Filed Pursuant to Rule 424(b)(2)

Registration Nos. 333-268718 and 333-268718-01

This pricing supplement, which is not complete and may be changed, relates to an effective Registration Statement under the Securities Act of 1933. This pricing supplement and the accompanying product supplement, prospectus supplement and prospectus are not an offer to sell these Securities in any country or jurisdiction where such an offer would not be permitted.

Preliminary Pricing Supplement Subject To Completion, dated September 8, 2025 (To Prospectus dated December 30, 2022, Series A Prospectus Supplement dated December 30, 2022 and Product Supplement No. WF-1 dated March 8, 2023)
	BofA Finance LLC Medium-Term Notes, Series A Fully and Unconditionally Guaranteed by Bank of America Corporation
	Market Linked Securities—Auto-Callable with Leveraged Upside Participation and Contingent Downside Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029
■   Linked to the common stock of Intel Corporation (the “Underlying Stock”) ■   Unlike ordinary debt securities, the Securities do not pay interest or repay a fixed amount of principal at maturityand are subject to potential automatic call prior to the Maturity Date upon the terms described below. Whether the Securities are automatically called for a fixed call premium or, if not automatically called, the Maturity Payment Amount, will depend, in each case, on the performance of the Underlying Stock ■   Automatic Call.  If the stock closing price of the Underlying Stock on the Call Date is greater than or equal to the Starting Price, the Securities will be automatically called for the principal amount plus a Call Premium of at least 24.05% of the principal amount (to be determined on the Pricing Date) ■   Maturity Payment Amount. If the Securities are not automatically calledprior to the Maturity Date, you will receive a Maturity Payment Amount that may be greater than, equal to or less than the principal amount of the Securities, depending on the performance of the Underlying Stock from the Starting Price to the Ending Price. The Maturity Payment Amount will reflect the following terms: ■ If the price of the Underlying Stock increases, you will receive the principal amount plus a positive return equal to the Upside Participation Rate of 150% of the percentage increase in the price of the Underlying Stock from the Starting Price ■ If the price of the Underlying Stock decreases but the decrease is not more than 40%, you will receive the principal amount ■ If the price of the Underlying Stock decreases by more than 40%, you will have full downside exposure to the decrease in the price of the Underlying Stock from the Starting Price, and you will lose more than 40%, and possibly all, of the principal amount of your Securities ■   Investors may lose a significant portion, or all, of the principal amount ■If the Securities are automatically called, the positive return on the Securities will be limited to the Call Premium, even if the stock closing price of the Underlying Stock on the Call Date significantly exceeds the Starting Price. If the Securities are automatically called, you will not have the opportunity to participate in any appreciation of the Underlying Stock at the Upside Participation Rate ■   All payments on the Securities are subject to the credit risk of BofA Finance LLC (“BofA Finance”), as issuer of the Securities, and Bank of America Corporation (“BAC” or the “Guarantor”), as guarantor of the Securities ■   No periodic interest payments or dividends ■   Securities will not be listed on any securities exchange

The initial estimated value of the Securities as of the Pricing Date is expected to be between $904.25 and $974.25 per Security, which is less than the public offering price listed below. The actual value of your Securities at any time will reflect many factors and cannot be predicted with accuracy. See “Selected Risk Considerations” beginning on page PS-9 of this pricing supplement and “Structuring the Securities” on page PS-17 of this pricing supplement for additional information.
The Securities have complex features and investing in the Securities involves risks not associated with an investment in conventional debt securities. Potential purchasers of the Securities should consider the information in “Selected Risk Considerations” beginning on page PS-9 herein and “Risk Factors” beginning on page PS-5 of the accompanying product supplement, page S-6 of the accompanying prospectus supplement, and page 7 of the accompanying prospectus. 
None of the Securities and Exchange Commission (the “SEC”), any state securities commission, or any other regulatory body has approved or disapproved of these Securities or determined if this pricing supplement and the accompanying product supplement, prospectus supplement and prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

	Public offering price	Underwriting Discount(1)(2)	Proceeds, before  expenses, to BofA Finance
Per Security	$1,000.00	$15.75	$984.25
Total

⁽¹⁾ Wells Fargo Securities, LLC and BofA Securities, Inc. are the selling agents for the distribution of the Securities and are acting as principal. See “Terms of the Securities—Selling Agents” in this pricing supplement for further information.

⁽²⁾ In addition, in respect of certain Securities sold in this offering, BofA Securities, Inc. or one of its affiliates may pay a fee of up to $3.00 per Security to selected securities dealers in consideration for marketing and other services in connection with the distribution of the Securities to other securities dealers.

Wells Fargo Securities 

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

Terms of the Securities

Issuer:	BofA Finance LLC
Guarantor:	BAC
UnderlyingStock:	The common stock of Intel Corporation (Nasdaq Global Select Market symbol: “INTC”) (the “Underlying Stock”).
Pricing Date*:	September 11, 2025.
Issue Date*:	September 16, 2025.
Maturity Date*:	September 14, 2029, subject to postponement as described below in “—Market Disruption Events and Postponement Provisions.” The Securities are not subject to repayment at the option of any holder of the Securities prior to the Maturity Date.
Denominations:	$1,000 and any integral multiple of $1,000. References in this pricing supplement to a “Security” are to a Security with a principal amount of $1,000.
Automatic Call:	If the stock closing price of the UnderlyingStock on the Call Date is greater than or equal to the Starting Price, the Securities will be automatically called, and on the Call Settlement Date you will be entitled to receive a cash payment per Security in U.S. dollars equal to the principal amount plus the Call Premium. If the Securities are automatically called, the positive return on the Securities will be limited to the Call Premium, even if the stock closing price of the Underlying Stock on the Call Date significantly exceeds the Starting Price. If the Securities are automatically called, you will not have the opportunity to participate in any appreciation of the Underlying Stock at the Upside Participation Rate. If the Securities are automatically called, they will cease to be outstanding on the Call Settlement Date and you will have no further rights under the Securities after the Call Settlement Date.  You will not receive any notice from us if the Securities are automatically called.
Call Date:	September 16, 2026, subject to postponement as described below in “—Market Disruption Events and Postponement Provisions”.
Call Premium:	At least 24.05% of the principal amount (or at least $240.50 per Security), to be determined on the Pricing Date.
Call Settlement Date:	Three business days after the Call Date (as the Call Date may be postponed as described below in “—Market Disruption Events and Postponement Provisions”).

Maturity Payment Amount:	If the Securities are not automatically called, then on the Maturity Date, you will be entitled to receive a cash payment per Security in U.S. dollars equal to the Maturity Payment Amount. The “Maturity Payment Amount” per Security will equal: • if the Ending Price is greater than the Starting Price: $1,000 + ($1,000 × Underlying Stock Return × Upside Participation Rate);
	• if the Ending Price is less than or equal to the Starting Price, but greater than or equal to the Threshold Price: $1,000; or • if the Ending Price is less than the Threshold Price: $1,000 + ($1,000 × Underlying Stock Return)

PS-2

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

If the Securities are not automatically called, and the Ending Price is less than the Threshold Price, you will have full downside exposure to the decrease in the price of the Underlying Stock from the Starting Price, and will lose more than 40%, and possibly all, of the principal amount of your Securities at maturity.
Final Calculation Day*:	September 11, 2029, subject to postponement as described below in “—Market Disruption Events and Postponement Provisions.”
Stock Closing   Price:	Stock closing price, closing price and adjustment factor have the meanings set forth under “General Terms of the Securities—Certain Terms for Securities Linked to an Underlying Stock—Certain Definitions” in the accompanying product supplement.
Starting Price:	$          , which is the stock closing price of the Underlying Stock on the Pricing Date.
Ending Price:	The stock closing price of the Underlying Stock on the Final Calculation Day.
Threshold Price:	$          , which is equal to 60.00% of the Starting Price.
Upside Participation Rate:	150%.
Underlying Stock Return:	The percentage change from the Starting Price to the Ending Price, measured as follows: Ending Price – Starting Price Starting Price
Market Disruption Events and Postponement Provisions:	The Call Date and the Final Calculation Day are each subject to postponement due to non-trading days and the occurrence of a market disruption event. In addition, each of the Call Settlement Date and the Maturity Date will be postponed if the Call Date or Final Calculation Day, as applicable, is postponed and will be adjusted for non-business days. For more information regarding adjustments to the Call Date, the Final Calculation Day, the Call Settlement Date and the Maturity Date, see “General Terms of the Securities—Consequences of a Market Disruption Event; Postponement of a Calculation Day—Securities Linked to a Single Market Measure” and “—Payment Dates” in the accompanying product supplement. For purposes of the accompanying product supplement, the Call Date and the Final Calculation Day are each a “calculation day” and the Call Settlement Date and the Maturity Date are each a “payment date.” In addition, for information regarding the circumstances that may result in a market disruption event, see “General Terms of the Securities—Certain Terms for Securities Linked to an Underlying Stock—Market Disruption Events” in the accompanying product supplement.
Calculation Agent:	BofA Securities, Inc. (“BofAS”), an affiliate of BofA Finance.

PS-3

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

Selling Agents:	BofAS and Wells Fargo Securities, LLC (“WFS”). Under our distribution agreement with BofAS, BofAS will purchase the Securities from us as principal at the public offering price indicated on the cover of this pricing supplement, less the indicated underwriting discount. BofAS will sell the Securities to WFS at the public offering price of the Securities less a concession of up to $15.75 per Security. WFS may provide dealers, which may include Wells Fargo Advisors (“WFA”) (the trade name of the retail brokerage business of WFS’s affiliates, Wells Fargo Clearing Services, LLC and Wells Fargo Advisors Financial Network, LLC), with a selling concession of up to $10.00 per Security. In addition to the concession allowed to WFA, WFS may pay up to $0.75 per Security to WFA as a distribution expense fee for each Security sold by WFA. In addition, in respect of certain Securities sold in this offering, BofAS or its affiliates may pay a fee of up to $3.00 per Security to selected securities dealers in consideration for marketing and other services in connection with the distribution of the Securities to other securities dealers. WFS has advised us that if it, WFA or any of their affiliates makes a secondary market in the Securities at any time up to the Issue Date or during the four-month period following the Issue Date, the secondary market price offered by it, WFA or any of their affiliates will be increased by an amount reflecting a portion of the costs associated with selling, structuring and hedging the Securities that are included in the public offering price of the Securities. Because this portion of the costs is not fully deducted upon issuance, WFS has advised us that any secondary market price it, WFA or any of their affiliates offers during this period will be higher than it otherwise would be outside of this period, as any secondary market price offered outside of this period will reflect the full deduction of the costs as described above. WFS has advised us that the amount of this increase in the secondary market price will decline steadily to zero over this four-month period. If you hold the Securities through an account at WFS, WFA or any of their affiliates, WFS has advised us that it expects that this increase will also be reflected in the value indicated for the Securities on your brokerage account statement.  If you hold your Securities through an account at a broker-dealer other than WFS, WFA or any of their affiliates, the value of the Securities on your brokerage account statement may be different than if you held your Securities at WFS, WFA or any of their affiliates.
Events of Default and Acceleration:	If an Event of Default, as defined in the senior indenture relating to the Securities and in the section entitled “Description of Debt Securities of BofA Finance LLC—Events of Default and Rights of Acceleration; Covenant Breaches” on page 54 of the accompanying prospectus, with respect to the Securities occurs and is continuing, the amount payable to a holder of the Securities upon any acceleration permitted under the senior indenture will be equal to the amount described under the caption “Terms of the Securities—Maturity Payment Amount” above, calculated as though the date of acceleration were the Maturity Date of the Securitiesand as though the Final Calculation Day were the third trading day prior to the date of acceleration; provided that, if the event of default occurs on or prior to the Call Date (i.e., not during the period from after the Call Date to the original Maturity Date of the Securities), then the payment on the Securities will be determined as described above under the caption “—Automatic Call,” calculated as if the Call Date were three trading days prior to the date of acceleration, and in such a case, the calculation agent shall pro-rate the Call Premium according to the period of time elapsed between the issue date of the Securities and the date of acceleration In case of a default in the payment of the Securities, whether at their maturity or upon acceleration, the Securities will not bear a default interest rate.
Material Tax Consequences:	For a discussion of the material U.S. federal income and estate tax consequences of the ownership and disposition of the Securities, see “U.S. Federal Income Tax Summary.”
CUSIP:	09711M6C1

* Subject to change

PS-4

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

Additional Information about BofA Finance, the Guarantor and the Securities

The terms and risks of the Securities are contained in this pricing supplement and in the following related product supplement, prospectus supplement and prospectus. Information included in this pricing supplement supersedes information in the product supplement, prospectus supplement and prospectus to the extent that it is different from that information. These documents can be accessed at the following links:

•    Product Supplement No. WF-1 dated March 8, 2023:

https://www.sec.gov/Archives/edgar/data/1682472/000119312523064044/d451936d424b2.htm

•    Series A MTN prospectus supplement dated December 30, 2022 and prospectus dated December 30, 2022: 
https://www.sec.gov/Archives/edgar/data/1682472/000119312522315195/d409418d424b3.htm

These documents have been filed as part of a registration statement with the SEC, which may, without cost, be accessed on the SEC website at www.sec.gov or obtained from BofAS by calling 1-800-294-1322. Before you invest, you should read this pricing supplement and the accompanying product supplement, prospectus supplement and prospectus for information about us, BAC and this offering. Any prior or contemporaneous oral statements and any other written materials you may have received are superseded by this pricing supplement and the accompanying product supplement, prospectus supplement and prospectus. Certain terms used but not defined in this pricing supplement have the meanings set forth in the accompanying product supplement or prospectus supplement. Unless otherwise indicated or unless the context requires otherwise, all references in this document to “we,” “us,” “our,” or similar references are to BofA Finance, and not to BAC.

The Securities are our senior debt securities.  Any payments on the Securities are fully and unconditionally guaranteed by BAC. The Securities and the related guarantee are not insured by the Federal Deposit Insurance Corporation or secured by collateral.  The Securities will rank equally in right of payment with all of our other unsecured and unsubordinated obligations, except obligations that are subject to any priorities or preferences by law. The related guarantee will rank equally in right of payment with all of BAC’s other unsecured and unsubordinated obligations, except obligations that are subject to any priorities or preferences by law, and senior to its subordinated obligations. Any payments due on the Securities, including any repayment of the principal amount, will be subject to the credit risk of BofA Finance, as issuer, and BAC, as guarantor.

PS-5

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

Investor Considerations

The Securities are not appropriate for all investors. The Securities may be an appropriate investment for investors who:

■   seek a fixed return equal to the Call Premium if the securities are automatically called on the Call Date;

■if the Securities are not automatically called, seek 150% leveraged exposure to the upside performance of the Underlying Stock if the Ending Price is greater than the Starting Price;

■are willing to accept the risk that, if the Securities are not automatically called and the Ending Price is less than the Threshold Price, they will be fully exposed to the decrease in the price of the Underlying Stock and will lose more than 40%, and possibly all, of the principal amount per Security at maturity;

■understand that the term of the Securities may be as short as approximately one year if the Securities are called on the Call Date;

■understand and are willing to accept the full downside risks of the UnderlyingStock;

■are willing to forgo interest payments on the Securities and dividends on the UnderlyingStock; and

■are willing to hold the Securities until maturity.

The Securities may not be an appropriate investment for investors who:

■seek a liquid investment or are unable or unwilling to hold the Securities to maturity;

■require full payment of the principal amount of the Securities at maturity;

■   seek a security with a fixed term;

■   are unwilling to accept the risk that, if the stock closing price of the Underlying Stock is less than the Starting Price on both the Call Date and the Final Calculation Day, they will not receive any positive return on their investment in the Securities;

■   are unwilling to accept the risk that the stock closing price of the Underlying Stock may decrease by more 40% from the Starting Price to the Ending Price;

■   are unwilling to purchase Securities with an estimated value as of the Pricing Date that is lower than the public offering price and that may be as low as the lower estimated value set forth on the cover page;

■seek current income;

■   are unwilling to accept the risk of exposure to the UnderlyingStock;

■seek exposure to the Underlying Stock but are unwilling to accept the risk/return trade-offs inherent in the Maturity Payment Amount for the Securities;

■are unwilling to accept the credit risk of BofA Finance, as issuer, and BAC, as guarantor, to obtain exposure to the Underlying Stock generally, or to obtain exposure to the Underlying Stock that the Securities provide specifically; or

■prefer the lower risk of conventional fixed income investments with comparable maturities issued by companies with comparable credit ratings.

The considerations identified above are not exhaustive. Whether or not the Securities are an appropriate investment for you will depend on your individual circumstances, and you should reach an investment decision only after you and your investment, legal, tax, accounting and other advisors have carefully considered the appropriateness of an investment in the Securities in light of your particular circumstances. You should also review carefully “Selected Risk Considerations” herein and “Risk Factors” in each of the accompanying product supplement, prospectus supplement and prospectus for risks related to an investment in the Securities. For more information about the UnderlyingStock, please see the section titled “The Common Stock of Intel Corporation” below.

PS-6

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

Determining Timing and Amount of Payment on the Securities

Whether the Securities are automatically called on the Call Date will be determined based on the stock closing price of the Underlying Stock on the Call Date as follows:

PS-7

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

If the Securities are not automatically called, then on the Maturity Date, you will receive a cash payment per Security (the Maturity Payment Amount) calculated as follows:

PS-8

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

Selected Risk Considerations

The Securities have complex features and investing in the Securities will involve risks not associated with an investment in conventional debt securities. Your decision to purchase the Securities should be made only after carefully considering the risks of an investment in the Securities, including those discussed below, with your advisors in light of your particular circumstances. The Securities are not an appropriate investment for you if you are not knowledgeable about significant elements of the Securities or financial matters in general. You should carefully review the more detailed explanation of risks relating to the Securities in the “Risk Factors” sections beginning on page PS-5 of the accompanying product supplement, page S-6 of the accompanying prospectus supplement and page 7 of the accompanying prospectus.

Structure-related Risks

Your investment may result in a loss; there is no guaranteed return of principal. There is no fixed principal repayment amount on the Securities at maturity. If the Securities are not automatically called prior to maturity and the Ending Price of the Underlying Stock is less than the Threshold Price, at maturity, you will lose 1% of the principal amount for each 1% that the Ending Price of the UnderlyingStock is less than the Starting Price. In that case, you will lose a significant portion or all of your investment in the Securities.

The Securities do not bear interest. Unlike a conventional debt security, no interest payments will be paid over the term of the Securities, regardless of the extent to which the stock closing price of the Underlying Stock exceeds the Starting Price or Threshold Price on the Call Date or the Final Calculation Day, as applicable.

If the Securities are automatically called, your return will be limited to the Call Premium. If the Securities are automatically called, the positive return on the Securities will be limited to the Call Premium, and you will not participate in any appreciation of the Underlying Stock beyond the Call Premium, which may be significant. Accordingly, if the Securities are automatically called, the return on the Securities may be less than the return in a direct investment in the UnderlyingStock. If the Securities are automatically called, you will not have the opportunity to participate in any appreciation of the Underlying Stock at the Upside Participation Rate.

The amount payable upon an automatic call or the Maturity Payment Amount, as applicable, will not reflect the price of the Underlying Stock other than on the Call Date or the Final Calculation Day, as applicable. The prices of the Underlying Stock during the term of the Securities other than on the Call Date or the Final Calculation Day, as applicable, will not affect payments on the Securities. Notwithstanding the foregoing, investors should generally be aware of the performance of the Underlying Stock while holding the Securities, as the performance of the Underlying Stock may influence the market value of the Securities. The calculation agent will determine whether the Securities will be automatically called, and will calculate the amount payable upon an automatic call or the Maturity Payment Amount, as applicable, by comparing only the Starting Price or Threshold Price, as applicable, to the stock closing price of the Underlying Stock on the Call Date or the Final Calculation Day, as applicable. No other prices of the Underlying Stock will be taken into account. As a result, if the Securities are not automatically called, and the Ending Price of the Underlying Stock is less than the Threshold Price, you will receive less than the principal amount at maturity even if the price of the Underlying Stock was always above the Threshold Price prior to the Final Calculation Day.

The Securities are subject to a potential automatic call, which would limit your ability to receive further payment on the Securities. The Securities are subject to a potential automatic call. The Securities will be automatically called if, on the Call Date, the stock closing price of the Underlying Stock is greater than or equal to the Starting Price. If the Securities are automatically called, you will be entitled to receive the principal amount and the Call Premium, and no further amounts will be payable with respect to the Securities. If the Securities are called, you may be unable to invest in other securities with a similar level of risk that could provide a return that is similar to the Securities.

Your return on the Securities may be less than the yield on a conventional debt security of comparable maturity. Any return that you receive on the Securities may be less than the return you would earn if you purchased a conventional debt security with the same Maturity Date. As a result, your investment in the Securities may not reflect the full opportunity cost to you when you consider factors, such as inflation, that affect the time value of money.

The Call Settlement Date or the Maturity Date may be postponed if the Call Date or the Final Calculation Day is postponed. The Call Date or Final Calculation Day with respect to the Underlying Stock will be postponed if the applicable originally scheduled Call Date or Final Calculation Day is not a trading day with respect to the Underlying Stock or if the calculation agent determines that a market disruption event has occurred or is continuing with respect to the Underlying Stock on the Call Date or Final Calculation Day. If such a postponement occurs with respect to the Call Date, then the Call Settlement Date will be postponed. If such a postponement occurs with respect to the Final Calculation Day, the Maturity Date will be the later of (i) the initial Maturity Date and (ii) three business days after the Final Calculation Day as postponed.

PS-9

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

Any payment on the Securities is subject to our credit risk and the credit risk of the Guarantor, and actual or perceived changes in our or the Guarantor’s creditworthiness are expected to affect the value of the Securities. The Securities are our senior unsecured debt securities. Any payment on the Securities will be fully and unconditionally guaranteed by the Guarantor. The Securities are not guaranteed by any entity other than the Guarantor. As a result, your receipt of the payment upon automatic call or the Maturity Payment Amount at maturity, as applicable, will be dependent upon our ability and the ability of the Guarantor to repay our respective obligations under the Securities on the applicable payment date, regardless of the stock closing price of the Underlying Stock as compared to the Starting Price or Threshold Price, as applicable. No assurance can be given as to what our financial condition or the financial condition of the Guarantor will be at any time after the Pricing Date of the Securities. If we and the Guarantor become unable to meet our respective financial obligations as they become due, you may not receive the amount(s) payable under the terms of the Securities.

In addition, our credit ratings and the credit ratings of the Guarantor are assessments by ratings agencies of our respective abilities to pay our obligations. Consequently, our or the Guarantor’s perceived creditworthiness and actual or anticipated decreases in our or the Guarantor’s credit ratings or increases in the spread between the yield on our respective securities and the yield on U.S. Treasury securities (the “credit spread”) prior to the Maturity Date of your Securities may adversely affect the market value of the Securities. However, because your return on the Securities depends upon factors in addition to our ability and the ability of the Guarantor to pay our respective obligations, such as the price of the Underlying Stock, an improvement in our or the Guarantor’s credit ratings will not reduce the other investment risks related to the Securities.

We are a finance subsidiary and, as such, have no independent assets, operations or revenues. We are a finance subsidiary of the Guarantor, have no operations other than those related to the issuance, administration and repayment of our debt securities that are guaranteed by the Guarantor, and are dependent upon the Guarantor and/or its other subsidiaries to meet our obligations under the Securities in the ordinary course. Therefore, our ability to make payments on the Securities may be limited.

Valuation- and Market-related Risks

The public offering price you pay for the Securities will exceed their initial estimated value. The range of initial estimated values of the Securities that is provided on the cover page of this preliminary pricing supplement, and the initial estimated value as of the Pricing Date that will be provided in the final pricing supplement, are each estimates only, determined as of a particular point in time by reference to our and our affiliates’ pricing models. These pricing models consider certain assumptions and variables, including our credit spreads and those of the Guarantor, the Guarantor’s internal funding rate, mid-market terms on hedging transactions, expectations on interest rates, dividends and volatility, price-sensitivity analysis, and the expected term of the Securities. These pricing models rely in part on certain forecasts about future events, which may prove to be incorrect. If you attempt to sell the Securities prior to maturity, their market value may be lower than the price you paid for them and lower than their initial estimated value. This is due to, among other things, changes in the price of the Underlying Stock, changes in the Guarantor’s internal funding rate, and the inclusion in the public offering price of the underwriting discount and the hedging related charges, all as further described in "Structuring the Securities" below. These factors, together with various credit, market and economic factors over the term of the Securities, are expected to reduce the price at which you may be able to sell the Securities in any secondary market and will affect the value of the Securities in complex and unpredictable ways.

The initial estimated value does not represent a minimum or maximum price at which we, BAC, BofAS or any of our other affiliates or WFS or its affiliates would be willing to purchase your Securities in any secondary market (if any exists) at any time. The value of your Securities at any time after issuance will vary based on many factors that cannot be predicted with accuracy, including the performance of the Underlying Stock, our and BAC’s creditworthiness and changes in market conditions.

We cannot assure you that a trading market for your Securities will ever develop or be maintained. We will not list the Securities on any securities exchange. We cannot predict how the Securities will trade in any secondary market or whether that market will be liquid or illiquid.

The Securities are not designed to be short-term trading instruments, and if you attempt to sell the Securities prior to maturity, their market value, if any, will be affected by various factors that interrelate in complex ways, and their market value may be less than the principal amount. The following factors are expected to affect the value of the Securities: price of the Underlying Stock at such time; volatility of the UnderlyingStock; economic and other conditions generally; interest rates; dividend yields; our and the Guarantor’s financial condition and creditworthiness; and time to maturity.

Conflict-related Risks

Trading and hedging activities by us, the Guarantor and any of our other affiliates, including BofAS, and WFS and its affiliates, may create conflicts of interest with you and may affect your return on the Securities and their market value. We, the Guarantor or one or more of our other affiliates, including BofAS, and WFS and its affiliates, may buy or sell shares of the Underlying Stock, or futures or options contracts on the Underlying Stock, or other listed or over-the-counter derivative instruments linked to the Underlying Stock. While we, the Guarantor or one or more of our other affiliates, including BofAS, and WFS and its affiliates, may from 

PS-10

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

time to time own shares of the UnderlyingStock, we, the Guarantor and our other affiliates, including BofAS, and WFS and its affiliates, do not control the issuer of the Underlying Stock (the “Underlying Stock Issuer”), and have not verified any disclosure made by the Underlying Stock Issuer or any other company. We, the Guarantor or one or more of our other affiliates, including BofAS, or WFS and its affiliates, may execute such purchases or sales for our own or their own accounts, for business reasons, or in connection with hedging our obligations under the Securities. These transactions may present a conflict of interest between your interest in the Securities and the interests we, the Guarantor and our other affiliates, including BofAS, and WFS and its affiliates, may have in our or their proprietary accounts, in facilitating transactions, including block trades, for our or their other customers, and in accounts under our or their management. These transactions may adversely affect the price of the Underlying Stock in a manner that could be adverse to your investment in the Securities. On or before the Pricing Date, any purchases or sales by us, the Guarantor or our other affiliates, including BofAS or others on its behalf, and WFS and its affiliates (including for the purpose of hedging some or all of our anticipated exposure in connection with the Securities), may affect the price of the Underlying Stock. Consequently, the price of the Underlying Stock may change subsequent to the Pricing Date, which may adversely affect the market value of the Securities.

We, the Guarantor or one or more of our other affiliates, including BofAS, and WFS and its affiliates, also expect to engage in hedging activities that could affect the price of the Underlying Stock on the Pricing Date. In addition, these hedging activities, including the unwinding of a hedge, may decrease the market value of your Securities prior to maturity, and may affect the amounts to be paid on the Securities. We, the Guarantor or one or more of our other affiliates, including BofAS, and WFS and its affiliates, may purchase or otherwise acquire a long or short position in the Securities and may hold or resell the Securities. For example, BofAS may enter into these transactions in connection with any market making activities in which it engages. We cannot assure you that these activities will not adversely affect the price of the Underlying Stock, the market value of your Securities prior to maturity or the amounts payable on the Securities.

If WFS, BofAS or an affiliate of either selling agent participating as a dealer in the distribution of the Securities conducts hedging activities for us in connection with the Securities, such selling agent or participating dealer will expect to realize a projected profit from such hedging activities, and this projected profit will be in addition to any discount, concession or fee received in connection with the sale of the Securities to you. This additional projected profit may create a further incentive for the selling agents or participating dealers to sell the Securities to you.

There may be potential conflicts of interest involving the calculation agent, which is an affiliate of ours. We have the right to appoint and remove the calculation agent. One of our affiliates will be the calculation agent for the Securities and, as such, will make a variety of determinations relating to the Securities, including the amounts that will be paid on the Securities. Under some circumstances, these duties could result in a conflict of interest between its status as our affiliate and its responsibilities as calculation agent.

Underlying-related Risks

Any payments on the Securities and whether the Securities are automatically called will depend upon the performance of the UnderlyingStock, and therefore the Securities are subject to the following risks, each as discussed in more detail in the accompanying product supplement.

●    The Securities may become linked to the common stock of a company other than the original Underlying Stock Issuer.

●    We cannot control actions by the Underlying Stock Issuer.

●    We and our affiliates have no affiliation with the Underlying Stock Issuer and have not independently verified any public disclosure of information.

●    You have limited anti-dilution protection.

Tax-related Risks

The U.S. federal income and estate tax consequences of the Securities are uncertain, and may be adverse to a holder of the Securities.  See “U.S. Federal Income Tax Summary” below and “U.S. Federal Income Tax Summary” beginning on page PS-36 of the accompanying product supplement.

PS-11

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

Hypothetical Examples and Returns

The payout profile, hypothetical returns and examples below illustrate hypothetical payments upon automatic call or at maturity for a $1,000 principal amount security on a hypothetical offering of securities under various scenarios, with the assumptions set forth in the table below. The terms used for purposes of these hypothetical examples do not represent the actual Starting Price or Threshold Price of the UnderlyingStock. The hypothetical Starting Price of 100.00 for the UnderlyingStock has been chosen for illustrative purposes only and does not represent the actual Starting Price of the UnderlyingStock. The actual Starting Price and Threshold Price for the Underlying Stock will be determined on the Pricing Date and will be set forth under “Terms of the Securities” above. For historical data regarding the actual stock closing prices of the UnderlyingStock, see the historical information set forth herein. The payout profile, return table and examples below assume that an investor purchases the Securities for $1,000 per Security. These examples are for purposes of illustration only and the values used in the examples may have been rounded for ease of analysis. The actual amount you receive at maturity or upon automatic call and the resulting pre-tax total rate of return will depend on the actual terms of the Securities.

Hypothetical Call Premium:	24.05% of the principal amount (the lowest possible Call Premium that may be determined on the Pricing Date)
Upside Participation Rate:	150.00%
Hypothetical Starting Price:	100.00
Hypothetical Threshold Price:	60.00 (60% of the hypothetical Starting Price)

Hypothetical Payout Profile

PS-12

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

Hypothetical Returns

If the Securities are automatically called:

If the Securities are automatically called on the Call Date, on the Call Settlement Date you will receive the principal amount of your Securities plus the Call Premium, resulting in a hypothetical pre-tax total rate of return of 24.05%.

If the Securities are not automatically called:

Hypothetical Ending Price	Hypothetical UnderlyingStock Return	Hypothetical Maturity Payment Amount per Security	Hypothetical pre-tax total rate of return
$200.00	100.00%	$2,500.00	150.00%
$150.00	50.00%	$1,750.00	75.00%
$140.00	40.00%	$1,600.00	60.00%
$130.00	30.00%	$1,450.00	45.00%
$120.00	20.00%	$1,300.00	30.00%
$110.00	10.00%	$1,150.00	15.00%
$105.00	5.00%	$1,075.00	7.50%
$100.00	0.00%	$1,000.00	0.00%
$90.00	-10.00%	$1,000.00	0.00%
$80.00	-20.00%	$1,000.00	0.00%
$70.00	-30.00%	$1,000.00	0.00%
$60.00	-40.00%	$1,000.00	0.00%
$59.00	-41.00%	$590.00	-41.00%
$50.00	-50.00%	$500.00	-50.00%
$25.00	-75.00%	$250.00	-75.00%
$0.00	-100.00%	$0.00	-100.00%

Hypothetical Examples Of Payment Upon Automatic Call Or At Maturity

Example 1. The stock closing price of the Underlying Stock on the Call Date is greater than the Starting Price, and the Securities are automatically called on the Call Date:

	Common Stock of Intel Corporation
Hypothetical Starting Price:	$100.00
Hypothetical stock closing price on the Call Date:	$125.00

Because the hypothetical stock closing price of the Underlying Stock on the Call Date is greater than the hypothetical Starting Price, the Securities are automatically calledon the Call Date and you will receive on the Call Settlement Date the principal amount of your Securities plus a Call Premium of 24.05% of the principal amount. Even though the Underlying Stock appreciated by 25.00% from the Starting Price to its stock closing price on the Call Date in this example, your return is limited to the Call Premium of 24.05%.

On the Call Settlement Date, you would receive $1,240.50 per Security.

PS-13

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

Example 2. The Securities are not automatically called. The Ending Price is greater than the Starting Price and the Maturity Payment Amount is greater than the principal amount of your Securities:

	Common Stock of Intel Corporation
Hypothetical Starting Price:	$100.00
Hypothetical stock closing price on the Call Date:	$75.00
Hypothetical Ending Price:	$120.00
Hypothetical Threshold Price:	$60.00, which is 60% of the hypothetical Starting Price
Hypothetical Underlying Stock Return (Ending Price - Starting Price)/Starting Price:	20.00%

Because the hypothetical stock closing price of the Underlying Stock on the Call Date is less than the hypothetical Starting Price, the Securities are not automatically called. Because the hypothetical Ending Price is greater than the hypothetical Starting Price, the Maturity Payment Amount per Security would be equal to the principal amount of $1,000 plus a positive return equal to:

$1,000 × Underlying Stock Return × Upside Participation Rate

$1,000 × 20.00% × 150.00%

= $300.00

On the Maturity Date, you would receive $1,300.00 per Security.

Example 3. The Securities are not automatically called. The Ending Price is less than the Starting Price but greater than the Threshold Price and the Maturity Payment Amount is equal to the principal amount of your Securities:

	Common Stock of Intel Corporation
Hypothetical Starting Price:	$100.00
Hypothetical stock closing price on the Call Date:	$75.00
Hypothetical Ending Price:	$95.00
Hypothetical Threshold Price:	$60.00, which is 60% of the hypothetical Starting Price
Hypothetical Underlying Stock Return (Ending Price - Starting Price)/Starting Price:	-5.00%

Because the hypothetical stock closing price of the Underlying Stock on the Call Date is less than the hypothetical Starting Price, the Securities are not automatically called. Because the hypothetical Ending Price is less than the hypothetical Starting Price, but not by more than 40%, you would receive the principal amount of your Securities at maturity.

On the Maturity Date, you would receive $1,000.00 per Security.

Example 4. The Securities are not automatically called. The Ending Price is less than the Threshold Price and the Maturity Payment Amount is less than the principal amount:

PS-14

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

	Common Stock of Intel Corporation
Hypothetical Starting Price:	$100.00
Hypothetical stock closing price on the Call Date:	$75.00
Hypothetical Ending Price:	$50.00
Hypothetical Threshold Price:	$60.00, which is 60% of the hypothetical Starting Price
Hypothetical Underlying Stock Return (Ending Price - Starting Price)/Starting Price:	-50.00%

Because the hypothetical stock closing price of the Underlying Stock on the Call Date is less than the hypothetical Starting Price, the Securities are not automatically called. Because the hypothetical Ending Price is less than the hypothetical Starting Price by more than 40%, you would lose a portion of the principal amount of your Securities and would be paid a Maturity Payment Amount equal to:

$1,000 + ($1,000 × Underlying Stock Return)

$1,000 + ($1,000 × -50.00%)

= $500.00

On the Maturity Date, you would receive $500.00 per Security, resulting in a loss of 50.00%.

PS-15

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

All disclosures contained in this pricing supplement regarding the Underlying Stock and the Underlying Stock Issuer have been derived from publicly available sources. Because the Underlying Stock is registered under the Securities Exchange Act of 1934, the Underlying Stock Issuer is required to periodically file certain financial and other information specified by the Securities and Exchange Commission (SEC). Information provided to or filed with the SEC by the Underlying Stock Issuer can be located through the SEC’s website at sec.gov by reference to the CIK number set forth below. This document relates only to the offering of the Securities and does not relate to any offering of Underlying Stock or any other securities of the Underlying Stock Issuer. None of us, the Guarantor, BofAS or any of our other affiliates has made any due diligence inquiry with respect to the Underlying Stock Issuer in connection with the offering of the Securities. None of us, the Guarantor, BofAS or any of our other affiliates has independently verified the accuracy or completeness of the publicly available documents or any other publicly available information regarding the Underlying Stock Issuer and hence makes no representation regarding the same. Furthermore, there can be no assurance that all events occurring prior to the date of this document, including events that would affect the accuracy or completeness of these publicly available documents that could affect the trading price of the Underlying Stock, have been or will be publicly disclosed. Subsequent disclosure of any events or the disclosure of or failure to disclose material future events concerning the Underlying Stock Issue could affect the price of the Underlying Stock and therefore could affect your return on the Securities. The selection of the Underlying Stock is not a recommendation to buy or sell the Underlying Stock.

None of us, the Guarantor, BofAS or any of our other affiliates makes any representation to you as to the future performance of the Underlying Stock. You should make your own investigation into the Underlying Stock.

The Common Stock of Intel Corporation

Intel Corporation designs, manufactures, and sells computer components and related products. The company's major products include microprocessors, chipsets, embedded processors and microcontrollers, flash memory, graphic, network and communication, systems management software, conferencing, and digital imaging products. This Underlying Stock trades on the Nasdaq Global Select Market under the symbol “INTC.” The company's CIK number is 0000050863 and its SEC file number is 000-06217. 

Historical Information

The following graph sets forth the daily historical performance of INTC in the period from January 2, 2020 through September 4, 2025. We obtained this historical data from Bloomberg L.P. We have not independently verified the accuracy or completeness of the information obtained from Bloomberg L.P. The horizontal line in the graph represents INTC’s hypothetical Threshold Price of $14.766, which is 60% of INTC’s hypothetical Starting Price of $24.61, which was its stock closing price on September 4, 2025. The actual Starting Price and Threshold Price will be determined on the Pricing Date.

This historical data on INTC is not necessarily indicative of the future performance of INTC or what the value of the Securities may be. Any historical upward or downward trend in the price of INTC during any period set forth above is not an indication that the price of INTC is more or less likely to increase or decrease at any time over the term of the Securities.

Before investing in the Securities, you should consult publicly available sources for the trading pattern and prices of INTC.

PS-16

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

Structuring the Securities

The Securities are our debt securities, the return on which is linked to the performance of the Underlying Stock. The related guarantee is BAC’s obligation. Any payments on the Securities, including payment of the Maturity Payment Amount, depend on the credit risk of BofA Finance and BAC and on the performance of the Underlying Stock. As is the case for all of our and BAC’s respective debt securities, including our market-linked securities, the economic terms of the Securities reflect our and BAC’s actual or perceived creditworthiness at the time of pricing. In addition, because market-linked securities result in increased operational, funding and liability management costs to us and BAC, BAC typically borrows the funds under these types of securities at a rate, which we refer to in this pricing supplement as BAC’s internal funding rate, that is more favorable to BAC than the rate that it might pay for a conventional fixed or floating rate debt security. This generally relatively lower internal funding rate, which is reflected in the economic terms of the Securities, along with the fees and charges associated with market-linked securities, typically results in the initial estimated value of the Securities on the Pricing Date being less than their public offering price.

The initial estimated value range of the Securities is set forth on the cover page of this preliminary pricing supplement. The final pricing supplement will set forth the initial estimated value of the Securities as of the Pricing Date.

In order to meet our payment obligations on the Securities, at the time we issue the Securities, we may choose to enter into certain hedging arrangements (which may include call options, put options or other derivatives) with BofAS or one of our other affiliates. The terms of these hedging arrangements are determined based upon terms provided by BofAS and its affiliates, and take into account a number of factors, including our and BAC’s creditworthiness, interest rate movements, the volatility of the Underlying Stock, the tenor of the Securities and the hedging arrangements. The economic terms of the Securities and their initial estimated value depend in part on the terms of these hedging arrangements.

BofAS has advised us that the hedging arrangements will include hedging related charges, reflecting the costs associated with, and our affiliates’ profit earned from, these hedging arrangements. Since hedging entails risk and may be influenced by unpredictable market forces, actual profits or losses from these hedging transactions may be more or less than any expected amounts.

For further information, see “Selected Risk Considerations” beginning on page PS-9 above and “Use of Proceeds” on page 17 of the accompanying prospectus.

PS-17

Market Linked Securities—Auto-Callable with Leveraged Upside

Participation and Contingent Downside

Principal at Risk Securities Linked to the Common Stock of Intel Corporation due September 14, 2029

U.S. Federal Income Tax Summary

You should consider the U.S. federal income and estate tax consequences of an investment in the Securities, including the following:

•    There is no statutory, judicial, or administrative authority directly addressing the characterization of the Securities.

•    You agree with us (in the absence of an administrative determination, or judicial ruling to the contrary) to characterize and treat the Securities for all tax purposes as single financial contracts with respect to the Underlying Stock. In the opinion of Sidley Austin LLP, our tax counsel, the U.S. federal income tax characterization and treatment of the Securities described herein is a reasonable interpretation of current law.

•    Under this characterization and tax treatment of the Securities, a U.S. Holder (as defined on page 71 of the accompanying prospectus) generally will recognize capital gain or loss upon maturity or upon a sale, exchange or redemption of the Securities. This capital gain or loss generally will be long-term capital gain or loss if you held the Securities for more than one year.

•    No assurance can be given that the Internal Revenue Service (“IRS”) or any court will agree with this characterization and tax treatment.

•    Under current IRS guidance, withholding on “dividend equivalent” payments (as discussed in the accompanying product supplement), if any, will not apply to Securities that are issued as of the date of this pricing supplement unless such Securities are “delta-one” instruments. Based on our determination that the Securities are not delta-one instruments, Non-U.S. Holders should not be subject to withholding on dividend equivalent payments, if any, under the Securities.

•    Under current law, while the matter is not entirely clear, individual Non-U.S. Holders, and entities whose property is potentially includible in those individuals’ gross estates for U.S. federal estate tax purposes (for example, a trust funded by such an individual and with respect to which the individual has retained certain interests or powers), should note that, absent an applicable treaty benefit, the Securities are likely to be treated as U.S. situs property, subject to U.S. federal estate tax. These individuals and entities should consult their own tax advisors regarding the U.S. federal estate tax consequences of investing in the Securities.

You should consult your own tax advisor concerning the U.S. federal income tax consequences to you of acquiring, owning, and disposing of the Securities, as well as any tax consequences arising under the laws of any state, local, foreign, or other tax jurisdiction and the possible effects of changes in U.S. federal or other tax laws. You should review carefully the discussion under the section entitled “U.S. Federal Income Tax Summary” beginning on page PS-36 of the accompanying product supplement.

PS-18