Summary Prospectus

NOVEMBER 16, 2018, AS AMENDED AND RESTATED MAY 31, 2019

TIAA-CREF Short Duration Impact Bond Fund

of the TIAA-CREF Funds

Class:	Institutional	Advisor	Premier	Retirement	Retail
Ticker:	TSDJX	TSDHX	TSDFX	TSDDX	TSDBX

Before you invest, you may want to review the Fund’s prospectus, which contains more information about the Fund and its risks. You can find the Fund’s prospectus and other information about the Fund online at www.tiaa.org/tcf_pro. You can also get this information at no cost by calling 800-223-1200 or by sending an e-mail request to disclosure@tiaa.org. The Fund’s prospectus and Statement of Additional Information (“SAI”), each dated November 16, 2018, as subsequently supplemented, are incorporated into this Summary Prospectus by reference and may be obtained free of charge at the website, phone number or e-mail address noted above.

Investment objective

The Fund seeks a favorable long-term total return through income and capital appreciation while giving special consideration to certain environmental, social and governance (“ESG”) criteria.

TIAA-CREF Short Duration Impact Bond Fund ■Summary Prospectus     1

Fees and expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. In addition to the fees and expenses described below, investors may be required to pay a commission to a broker-dealer or other financial intermediary on purchases and sales of Institutional Class or Advisor Class shares of the Fund.

SHAREHOLDER FEES (fees paid directly from your investment)

	Institutional Class	Advisor Class	Premier Class	Retirement Class	Retail Class
Maximum sales charge imposed on purchases (percentage of offering price)	0%	0%	0%	0%	0%
Maximum deferred sales charge	0%	0%	0%	0%	0%
Maximum sales charge imposed on reinvested dividends and other distributions	0%	0%	0%	0%	0%
Redemption or exchange fee	0%	0%	0%	0%	0%
Account maintenance fee (annual fee on accounts under $2,000)	0%	0%	0%	0%	$15.00

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ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)

		Institutional Class	Advisor Class	Premier Class	Retirement Class	Retail Class
Management fees		0.30%	0.30%	0.30%	0.30%	0.30%
Distribution (Rule 12b-1) fees		—	—	0.15%	—	0.25%
Other expenses1		0.57%	0.65%	0.57%	0.82%	0.78%
Total annual Fund operating expenses		0.87%	0.95%	1.02%	1.12%	1.33%
Waivers and expense reimbursements2		(0.52)%	(0.52)%	(0.52)%	(0.52)%	(0.63)%
Total annual Fund operating expenses after
	fee waiver and/or expense reimbursement	0.35%	0.43%	0.50%	0.60%	0.70%

1

Estimates are for the current fiscal year.

2

Under the Fund’s expense reimbursement arrangements, the Fund’s investment adviser, Teachers Advisors, LLC, has contractually agreed to reimburse the Fund for any Total annual Fund operating expenses (excluding interest, taxes, brokerage commissions or other transactional expenses, Acquired fund fees and expenses and extraordinary expenses) that exceed: (i) 0.35% of average daily net assets for Institutional Class shares; (ii) 0.50% of average daily net assets for Advisor Class shares; (iii) 0.50% of average daily net assets for Premier Class shares; (iv) 0.60% of average daily net assets for Retirement Class shares; and (v) 0.70% of average daily net assets for Retail Class shares of the Fund. These expense reimbursement arrangements will continue through at least November 15, 2019, unless changed with approval of the Board of Trustees.

Example

This example is intended to help you compare the cost of investing in shares of the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses, before fee waivers and/or expense reimbursements, remain the same. The example assumes that the Fund’s fee waiver and/or expense reimbursement arrangements will remain in place for the duration noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

	Institutional Class		Advisor Class		Premier Class		Retirement Class		Retail Class
1 year	$	36	$	44	$	51	$	61	$	72
3 years	$	226	$	251	$	273	$	304	$	359

Portfolio turnover

The Fund pays transaction costs when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. The Fund has no annual portfolio turnover rate because the Fund is newly operational.

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Principal investment strategies

Under normal circumstances, the Fund invests at least 80% of its assets in fixed-income investments with average maturities or average lives of less than 5 years. The Fund primarily invests in a broad range of investment-grade bonds and fixed-income securities, including, but not limited to, U.S. Government securities, corporate bonds and mortgage-backed and other asset-backed securities. The Fund may also invest in other fixed-income securities, including those of non-investment-grade quality (usually called “high-yield” or “junk bonds”). Securities of non-investment-grade quality are speculative in nature. Although the Fund may invest in fixed-income securities of any duration, the duration of the Fund’s portfolio typically ranges between zero and three years. As of September 30, 2018, the duration of the Fund’s benchmark index, the Bloomberg Barclays U.S. 1–3 Year Government/Credit Bond Index, was 1.92 years. For purposes of the 80% investment policy, the term “assets” means net assets, plus the amount of any borrowings for investment purposes. The term “duration” is defined in the Glossary section in the non-summary portion of the Prospectus.

The Fund is actively managed and does not rely exclusively on rating agencies when making investment decisions. Instead, the Fund’s investment adviser, Teachers Advisors, LLC (“Advisors”) performs its own credit analysis, paying particular attention to economic trends and other market events. Subject to the ESG and Impact criteria described below, individual securities or sectors may be overweighted or underweighted relative to the Fund’s benchmark index, when Advisors believes that the Fund can boost returns above that of the index.

The Fund’s investments in fixed-income securities issued by corporate entities or certain foreign governments are subject to certain ESG criteria. The ESG criteria are implemented based on data provided by independent research vendor(s). All corporate issuers must meet or exceed minimum ESG performance standards to be eligible for investment by the Fund. The evaluation process favors companies with leadership in ESG performance relative to their peers. Typically, environmental assessment categories include climate change, natural resource use, waste management and environmental opportunities. Social evaluation categories include human capital, product safety and social opportunities. Governance assessment categories include corporate governance, business ethics and government & public policy. How well companies adhere to international norms and principles and involvement in major ESG controversies (examples of which may relate to the environment, customers, human rights & community, labor rights & supply chain, and governance) are other considerations.

The ESG evaluation process is conducted on an industry-specific basis and involves the identification of key performance indicators, which are given more or less relative weight compared to the broader range of potential assessment categories. Concerns in one area do not automatically eliminate an issuer from being an eligible Fund investment. When ESG concerns exist, the evaluation process gives careful consideration to how companies address the risks and opportunities they face in the context of their sector or industry and relative to

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their peers. The Fund will not generally invest in companies significantly involved in certain business activities, including but not limited to, the production of alcohol, tobacco, military weapons, firearms, nuclear power and gambling products and services. While Advisors may invest in corporate and foreign government issuers that meet these criteria, it is not required to invest in every issuer that meets these criteria. The ESG criteria the Fund takes into consideration are non-fundamental investment policies. Such criteria and the universe of investments that the Fund utilizes may be changed without the approval of the Fund’s shareholders.

The Fund is not restricted from investing in any securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities. Advisors considers investments in these securities to be consistent with the Fund’s investment and Impact objectives.

The Fund also invests in certain asset-backed securities, mortgage-backed securities and other securities that represent interests in assets such as pools of mortgage loans, automobile loans or credit card receivables. These securities are typically issued by legal entities established specifically to hold assets and to issue debt obligations backed by those assets. Asset-backed or mortgage-backed securities are normally created or “sponsored” by banks or other institutions or by certain government-sponsored enterprises such as the Federal National Mortgage Association or the Federal Home Loan Mortgage Corporation. Advisors does not take into consideration whether the sponsor of an asset-backed security in which the Fund invests meets the ESG criteria. That is because asset-backed securities represent interests in pools of loans, and not of the ongoing business enterprise of the sponsor. It is therefore possible that the Fund could invest in an asset-backed or mortgage-backed security sponsored by a bank or other financial institution in which the Fund could not invest directly.

The Fund’s investments in mortgage-backed securities can include pass-through securities sold by private, governmental and government-related organizations and collateralized mortgage obligations (“CMOs”). Mortgage pass-through securities are created when mortgages are pooled together and interests in the pool are sold to investors. The cash flow from the underlying mortgages is “passed through” to investors in periodic principal and interest payments. CMOs are obligations that are fully collateralized directly or indirectly by a pool of mortgages from which payments of principal and interest are dedicated to the payment of principal and interest on the CMO.

The Corporate Governance and Social Responsibility Committee (the “CGSR Committee”) of the Board of Trustees of the Trust (“Board of Trustees”) reviews the ESG criteria used to evaluate securities issued by corporate and foreign government issuers held by the Fund and reviews the ESG vendor(s) of that service. Advisors seeks to ensure that the Fund’s investments are consistent with its ESG criteria, but Advisors cannot guarantee that this will always be the case for every Fund investment issued by a corporate entity or by a foreign government or agency. Consistent with its responsibilities, the CGSR Committee

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evaluates options for implementing the Fund’s ESG investment criteria and monitors the ESG vendors selected to supply the ESG eligible universe. Advisors has the right to change the ESG vendor(s) at any time and to add to the number of vendors providing the universe of eligible companies. Investing on the basis of ESG criteria is qualitative and subjective by nature, and there can be no assurance that the ESG criteria utilized by the Fund’s ESG vendor(s) or any judgment exercised by the CGSR Committee or Advisors will reflect the beliefs or values of any particular investor.

Additionally, Advisors invests a portion of the Fund’s assets in fixed-income instruments according to TIAA’s proprietary Impact framework. These investments provide direct exposure to issuers and/or individual projects with social or environmental benefits. Within this Impact allocation, the Fund seeks opportunities to invest in publicly traded fixed-income securities that finance initiatives in areas including affordable housing, community and economic development, renewable energy and climate change, and natural resources. These investments will be selected based on the same financial criteria used by Advisors in selecting the Fund’s other fixed-income investments.

The Fund may also engage in relative value trading, a strategy in which the Fund reallocates assets across different sectors and maturities. Relative value trading is designed to enhance the Fund’s returns but increases the Fund’s portfolio turnover rate.

The Fund may purchase and sell futures, options, swaps, forwards and other fixed-income derivative instruments to carry out the Fund’s investment strategies. The Fund may also invest in credit default swaps or index credit default swaps primarily to hedge or manage risks associated with assets held by the Fund or to facilitate the implementation of portfolio strategies for the Fund. The Fund may also invest in foreign securities, including emerging markets fixed-income securities and non-dollar denominated instruments. Under most circumstances, the Fund’s investments in fixed-income securities of foreign issuers constitute less than 25% of the Fund’s assets.

Principal investment risks

You could lose money over short or long periods by investing in this Fund. An investment in the Fund, due to the nature of the Fund’s portfolio holdings, typically is subject to the following principal investment risks:

·ESG Criteria Risk—The risk that because the Fund’s ESG criteria and/or proprietary Impact framework exclude securities of certain issuers for nonfinancial reasons, the Fund may forgo some market opportunities available to funds that do not use these criteria.

·Interest Rate Risk (a type of Market Risk)—The risk that increases in interest rates can cause the prices of fixed-income investments to decline. This risk is heightened to the extent the Fund invests in longer duration fixed-income investments and during periods when prevailing interest rates are low or negative. As of the date of this Prospectus, interest rates in the

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United States and in certain foreign markets are at or near historic lows, which may increase the Fund’s exposure to risks associated with rising interest rates. In general, changing interest rates could have unpredictable effects on the markets and may expose fixed-income and related markets to heightened volatility.

·Prepayment Risk—The risk that, during periods of falling interest rates, borrowers may pay off their mortgage loans sooner than expected, forcing the Fund to reinvest the unanticipated proceeds at lower interest rates and resulting in a decline in income.

·Extension Risk—The risk that, during periods of rising interest rates, borrowers may pay off their mortgage loans later than expected, preventing the Fund from reinvesting principal proceeds at higher interest rates and resulting in less income than potentially available.

·Issuer Risk (often called Financial Risk)—The risk that an issuer’s earnings prospects and overall financial position will deteriorate, causing a decline in the value of the issuer’s financial instruments over short or extended periods of time.

·Credit Risk (a type of Issuer Risk)—The risk that the issuer of fixed-income investments may not be able or willing to meet interest or principal payments when the payments become due.

·Income Volatility Risk—The risk that the level of current income from a portfolio of fixed-income investments may decline in certain interest rate environments.

·Market Volatility, Liquidity and Valuation Risk (types of Market Risk)—The risk that volatile or dramatic reductions in trading activity make it difficult for the Fund to properly value its investments and that the Fund may not be able to purchase or sell an investment at an attractive price, if at all.

·Fixed-Income Foreign Investment Risk—Investment in fixed-income securities or financial instruments of foreign issuers involves increased risks due to adverse issuer, political, regulatory, currency, market or economic developments. These developments may impact the ability of a foreign debt issuer to make timely and ultimate payments on its debt obligations to the Fund or impair the Fund’s ability to enforce its rights against the foreign debt issuer. These risks are heightened in emerging or developing markets. Foreign investments may also be less liquid and more difficult to value than investments in U.S. issuers.

·Active Management Risk—The risk that Advisors’ strategy, investment selection or trading execution may cause the Fund to underperform relative to the benchmark index or mutual funds with similar investment objectives.

·Call Risk—The risk that, during periods of falling interest rates, an issuer may call (or repay) a fixed-income security prior to maturity, resulting in a decline in the Fund’s income.

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·Downgrade Risk—The risk that securities are subsequently downgraded should Advisors and/or rating agencies believe the issuer’s business outlook or creditworthiness has deteriorated.

·Non-Investment-Grade Securities Risk—Issuers of non-investment-grade securities, which are usually called “high-yield” or “junk bonds,” are typically in weaker financial health and such securities can be harder to value and sell and their prices can be more volatile than more highly rated securities. While these securities generally have higher rates of interest, they also involve greater risk of default than do securities of a higher-quality rating.

·Illiquid Investments Risk—The risk that illiquid investments may be difficult to sell for the value at which they are carried, if at all, or at any price within the desired time frame.

·U.S. Government Securities Risk—Securities issued by the U.S. Government or one of its agencies or instrumentalities may receive varying levels of support from the U.S. Government, which could affect the Fund’s ability to recover should they default. To the extent the Fund invests significantly in securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities, any market movements, regulatory changes or changes in political or economic conditions that affect the securities of the U.S. Government or its agencies or instrumentalities in which the Fund invests may have a significant impact on the Fund’s performance.

·Floating and Variable Rate Securities Risk—Floating and variable rate securities provide for a periodic adjustment in the interest rate paid on the securities. The rate adjustment intervals may be regular and range from daily up to annually, or may be based on an event, such as a change in the prime rate. Floating and variable rate securities may be subject to greater liquidity risk than other debt securities, meaning that there may be limitations on the Fund’s ability to sell the securities at any given time. Such securities also may lose value.

·Derivatives Risk—The risks associated with investing in derivatives may be different and greater than the risks associated with directly investing in the underlying securities and other instruments. The Fund may use futures, options, single name or index credit default swaps, or forwards, and the Fund may also use more complex derivatives such as swaps that might present liquidity, credit and counterparty risk. When investing in derivatives, the Fund may lose more than the principal amount invested.

Please see the non-summary portion of the Prospectus for more detailed information about the risks described above.

Past performance

Performance information is not available for the Fund for the most recently completed calendar year because the Fund is newly operational.

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For current performance information of each share class, including performance to the most recent month-end, please visit www.tiaa.org.

Portfolio management

Investment Adviser. The Fund’s investment adviser is Teachers Advisors, LLC.

Portfolio Managers. The following persons manage the Fund on a day-to-day basis:

Name:	Stephen Liberatore, CFA	Jessica Zarzycki, CFA
Title:	Managing Director	Senior Director
Experience on Fund:	since 2018	since 2018

Purchase and sale of Fund shares

Institutional Class shares are available for purchase directly from the Fund by certain eligible investors (which include employee benefit plans and financial intermediaries). Advisor Class shares are available for purchase through certain financial intermediaries, employee benefit plans and insurance company separate accounts. Premier Class and Retirement Class shares are generally available for purchase through employee benefit plans, other types of savings plans or accounts, and certain financial intermediaries. Retail Class shares are available for purchase through certain financial intermediaries or by contacting the Fund directly at 800-223-1200 or www.tiaa.org.

·The minimum initial investment is $2 million and the minimum subsequent investment is $1,000 for Institutional Class shares, unless an investor purchases shares by or through financial intermediaries that have entered into an appropriate agreement with the Fund or its affiliates. Employee benefit plans, fee-based managed account programs (“wrap accounts”), state sponsored 529 college savings plans, collective trust funds, investment companies or other pooled investment vehicles, thrifts and bank and trust companies that have entered into agreements to offer Institutional Class shares held in omnibus accounts on the books of the Fund are exempt from initial and subsequent investment minimums.

·There are no minimum initial or subsequent investment requirements for Advisor Class, Premier Class or Retirement Class shares.

·The minimum initial investment for Retail Class shares is $2,000 per Fund account for Traditional IRA, Roth IRA and Coverdell accounts and $2,500 for all other account types. Subsequent investments for all account types must be at least $100.

Redeeming or Exchanging Shares. You can redeem (sell) or exchange your shares of the Fund on any day that the New York Stock Exchange (“NYSE”) or its affiliated exchanges, NYSE Arca Equities or NYSE MKT, are open for trading (each such day a “Business Day”). Exchanges may be made for shares of the same share class of other funds offered by the Trust. If your shares are held through a third party, please contact that entity for applicable redemption or exchange requirements.

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Tax information

The Fund intends to make distributions to shareholders that may be taxed as ordinary income or capital gains. Distributions made to tax-exempt shareholders or shareholders who hold Fund shares in a tax-deferred account are generally not subject to income tax in the current year, but redemptions made from tax-deferred accounts may be subject to income tax.

Payments to broker-dealers and other financial intermediary compensation

If you purchase shares of the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and/or its related companies may pay the financial intermediary for providing investor services. The Fund’s related companies may also pay the financial intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other financial intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

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TIAA

730 Third Avenue

New York, NY 10017-3206

Printed on paper containing recycled fiber A40357 (5/19)

TIAA

730 Third Avenue

New York, NY 10017-3206

A40357 (5/19)