485BPOS

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Dec. 31, 2017
Registrant Name	dei_EntityRegistrantName	TRANSAMERICA FUNDS
Central Index Key	dei_EntityCentralIndexKey	0000787623
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Apr. 30, 2018
Document Effective Date	dei_DocumentEffectiveDate	May 01, 2018
Prospectus Date	rr_ProspectusDate	May 01, 2018

Risk/Return:

rr_RiskReturnAbstract

Prospectus Date

rr_ProspectusDate

May 01, 2018

Risk/Return:

rr_RiskReturnAbstract

Objective [Heading]

rr_ObjectiveHeading

Investment Objective:

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses:

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

May 1, 2019

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, 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.

For the period beginning April 21, 2017 and ending December 31, 2017, the portfolio turnover rate for the fund was 11% of the average value of its portfolio.

Expenses Represent Both Master and Feeder [Text]

rr_ExpensesRepresentBothMasterAndFeeder

The fund invests in securities through an underlying master fund. This table and the example below reflect the direct expenses of the fund and its allocated share of expenses of the underlying master fund.

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in 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 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 remain the same. Only the 1 year dollar amount shown below reflects TAM's agreement to waive fees and/or reimburse fund expenses. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund invests in securities through an underlying master fund having the same investment goals and strategies. BlackRock Fund Advisors is the investment adviser of the S&P 500 Index Master Portfolio, the underlying master fund in which the fund invests.

The fund seeks its objective by investing in the stocks comprising the Standard & Poor’s (“S&P”) 500^® Index¹. The weightings of stocks in the S&P 500^® Index are based on each stock’s relative total market capitalization; that is, its market price per share times the number of shares outstanding. The fund invests approximately the same percentage of its assets in each stock as the stock represents in the S&P 500^®Index. Under normal circumstances, the fund invests at least 90% of its net assets (plus the amount of borrowings, if any, for investment purposes) in securities comprising the S&P 500^®Index and other investments with similar economic characteristics.

The fund attempts to achieve, in both rising and falling markets, a correlation of at least 95% between the total return of its net assets before expenses and the total return of the S&P 500^®Index. The fund’s ability to match the investment performance of the S&P 500^® Index may be affected by, among other things, fund expenses, the amount of cash and cash equivalents held by the fund, the manner in which the total return of the S&P 500^® Index is calculated, the size of the fund’s investment portfolio and the timing, frequency and size of cash flows into and out of the fund. In the unlikely event that the fund cannot achieve a correlation of at least 95%, the fund’s Trustees will consider alternative arrangements.

In the future, the fund may select another index if it is deemed to be more representative of the performance of publicly traded common stocks in the aggregate.

In seeking to replicate or match the performance of the S&P 500^®Index, the fund may use various investment techniques, such as buying and selling futures contracts and options, entering into swap agreements and purchasing indexed securities. The fund may also lend its portfolio securities. These techniques may increase the fund’s volatility and may involve a small investment of cash relative to the magnitude of the risk being taken.

The fund may invest not more than 10% of its total assets, under normal market conditions, in cash and high-quality money market instruments. These investments are made to provide liquidity and when there is an unexpected or abnormal level of investments in or redemptions from the fund.

1 Standard & Poor's does not sponsor the fund, nor is it affiliated in any way with the fund or the fund's advisers. "Standard & Poor's^®," "S&P^®," "S&P 500^®," and "Standard & Poor's 500^®" are trademarks of McGraw-Hill, Inc. The fund is not sponsored, endorsed, sold or promoted by Standard & Poor's and Standard & Poor's makes no representation or warranty, express or implied, regarding the advisability of investing in the fund.

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

Risk is inherent in all investing. Many factors affect the fund's performance. The value of your investment in the fund, as well as the amount of return you receive on your investment, may fluctuate significantly. You may lose part or all of your investment in the fund or your investment may not perform as well as other similar investments. The fund, through its investment in the underlying master fund, is subject to the risks of the underlying master fund. The following is a summary description of principal risks (in alphabetical order) of investing in the fund (either directly or through its investment in the underlying fund). Each risk described below may not apply to the underlying master fund and the underlying master fund may be subject to additional or different risks than those described below. An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. You may lose money if you invest in this fund.

Counterparty – The fund will be subject to credit risk (meaning the risk of adverse changes in an issuer’s real or perceived financial strength) with respect to counterparties to derivatives, repurchase agreements and other financial contracts entered into by the fund or held by special purpose or structured vehicles. Adverse changes to counterparties may cause the value of financial contracts to go down. If a counterparty becomes bankrupt or otherwise fails to perform its obligations, the value of your investment in the fund may decline.

Derivatives – Using derivatives exposes the fund to additional risks and can increase fund losses and reduce opportunities for gains when market prices, interest rates, currencies, or the derivatives themselves, behave in a way not anticipated by the fund. Using derivatives may have a leveraging effect, increase fund volatility and not produce the result intended. Certain derivatives have the potential for unlimited loss, regardless of the size of the initial investment. Derivatives may be difficult to sell, unwind or value, and the counterparty may default on its obligations to the fund. Derivatives are generally subject to the risks applicable to the assets, rates, indices or other indicators underlying the derivative. The value of a derivative may fluctuate more than, or otherwise not correlate well with, the underlying assets, rates, indices or other indicators to which it relates. Use of derivatives may have different tax consequences for the fund than an investment in the underlying security, and those differences may affect the amount, timing and character of income distributed to shareholders. The U.S. government and foreign governments are in the process of adopting and implementing regulations governing derivatives markets, including mandatory clearing of certain derivatives, margin and reporting requirements. The ultimate impact of the regulations remains unclear. Additional regulation of derivatives may make derivatives more costly, limit their availability or utility, otherwise adversely affect their performance, or disrupt markets. For additional information regarding derivatives, see “More on Risks of Investing in the Fund—More on Principal Risks: Derivatives” in this prospectus. In addition, the SEC has proposed a new rule that would change the regulation of the use of derivatives by registered investment companies, such as the fund. If the proposed rule, or a different rule, takes effect, it could limit the ability of the fund to invest in derivatives.

Equity Securities – Equity securities represent an ownership interest in an issuer, rank junior in a company’s capital structure and consequently may entail greater risk of loss than debt securities. Equity securities include common and preferred stocks. Stock markets are volatile. Equity securities may have greater price volatility than other asset classes, such as fixed income securities, and fluctuate based on changes in a company’s financial condition and overall market and economic conditions. If the market prices of the equity securities owned by the fund fall, the value of your investment in the fund will decline. If the fund holds equity securities in a company that becomes insolvent, the fund’s interests in the company will rank junior in priority to the interests of debtholders and general creditors of the company.

Index Tracking – While the underlying master fund seeks to track the performance of an index (i.e., achieve a high degree of correlation with the applicable index), the returns of the underlying master fund that seeks to track an index may not match the returns of the applicable index.

Industry Concentration – The underlying master fund will concentrate its investments in issuers of one or more particular industries to the same extent that its underlying index is so concentrated and to the extent permitted by applicable regulatory guidance. Concentration in a particular industry subjects the underlying master fund to the risks associated with that industry. As a result, the underlying master fund may be subject to greater price volatility and risk of loss as a result of adverse economic, business or other developments affecting that industry than funds investing in a broader range of industries.

Legal and Regulatory – Legal and regulatory changes could occur that may adversely affect the fund, its investments, and its ability to pursue its investment strategies and/or increase the costs of implementing such strategies. New or revised laws or regulations may be imposed by the U.S. Securities and Exchange Commission, the U.S. Commodity Futures Trading Commission, the Internal Revenue Service, the U.S. Federal Reserve or other governmental regulatory authorities or self-regulatory organizations that could adversely affect the fund. The fund also may be adversely affected by changes in the enforcement or interpretation of existing statutes and rules by governmental regulatory authorities or self-regulatory organizations.

Leveraging – The value of your investment may be more volatile to the extent that the fund borrows or uses derivatives or other investments, such as ETFs, that have embedded leverage. Other risks also will be compounded because leverage generally magnifies the effect of a change in the value of an asset and creates a risk of loss of value on a larger pool of assets than the fund would otherwise have. The use of leverage is considered to be a speculative investment practice and may result in the loss of a substantial amount, and possibly all, of the fund's assets. The fund also may have to sell assets at inopportune times to satisfy its obligations or meet segregation requirements.

Management – The fund is subject to the risk that the investment manager’s or investment adviser’s judgments and decisions may be incorrect or otherwise may not produce the desired results. The value of your investment may decrease if the investment manager’s or investment adviser’s judgment about the quality, relative yield or value of, or market trends affecting, a particular security or issuer, industry, sector, region or market segment, or about the economy or interest rates, is incorrect. The fund may also suffer losses if there are imperfections, errors or limitations in the quantitative, analytic or other tools, resources, information and data used, or the analyses employed or relied on, by the investment manager or investment adviser, if such tools, resources, information or data are used incorrectly, fail to produce the desired results or otherwise do not work as intended, or if the investment manager’s or investment adviser’s investment style is out of favor or otherwise fails to produce the desired results. The fund’s investment strategies designed by the investment manager or investment adviser may not work as intended. In addition, the fund’s investment strategies or policies may change from time to time. Those changes may not lead to the results intended by the investment manager or investment adviser and could have an adverse effect on the value or performance of the fund. Any of these things could cause the fund to lose value or its results to lag relevant benchmarks or other funds with similar objectives.

Market – The value of the fund's securities may go up or down, sometimes rapidly or unpredictably, due to general market conditions, such as real or perceived adverse economic or political conditions, inflation, changes in interest rates or currency rates, lack of liquidity in the markets or adverse investor sentiment. Adverse market conditions may be prolonged and may not have the same impact on all types of securities. The value of securities also may go down due to events or conditions that affect particular sectors, industries or issuers. If the value of the securities owned by the fund fall, the value of your investment will go down. The fund may experience a substantial or complete loss on any individual security.

In the past decade, financial markets throughout the world have experienced increased volatility, depressed valuations, decreased liquidity and heightened uncertainty. Governmental and non-governmental issuers have defaulted on, or been forced to restructure, their debts. These market conditions may continue, worsen or spread. Events that have contributed to these market conditions include, but are not limited to, major cybersecurity events; geopolitical events (including wars and terror attacks); measures to address budget deficits; downgrading of sovereign debt; declines in oil and commodity prices; dramatic changes in currency exchange rates; and public sentiment. The European Union has experienced increasing stress for a variety of reasons, including economic downturns in various member countries. In June 2016, the United Kingdom voted to withdraw from the European Union, and additional members could do the same. The impact of these conditions and events is not yet known.

The U.S. government and the Federal Reserve, as well as certain foreign governments and central banks have taken steps to support financial markets, including by keeping interest rates at historically low levels. This and other government interventions may not work as intended, particularly if the efforts are perceived by investors as being unlikely to achieve the desired results. The Federal Reserve has reduced its market support activities and has begun raising interest rates. Certain foreign governments and central banks are implementing or discussing so-called negative interest rates (e.g., charging depositors who keep their cash at a bank) to spur economic growth. Further Federal Reserve or other U.S. or non-U.S. governmental or central bank actions, including interest rate increases or contrary actions by different governments could negatively affect financial markets generally, increase market volatility, and reduce the value and liquidity of securities in which the fund invests.

Policy and legislative changes in the United States and in other countries are affecting many aspects of financial regulation, and may in some instances contribute to decreased liquidity and increased volatility in the financial markets. The impact of these changes on the markets, and the practical implications for market participants, may not be fully known for some time.

Economies and financial markets throughout the world are increasingly interconnected. Economic, financial or political events, trading and tariff arrangements, terrorism, natural disasters and other circumstances in one country or region could have profound impacts on global economies or markets. As a result, whether or not the fund invests in securities of issuers located in or with significant exposure to the countries directly affected, the value and liquidity of the fund's investments may be negatively affected.

Passive Investment – Because the investment adviser of the underlying master fund does not select individual companies in the index that the underlying master fund tracks, the underlying master fund may hold securities of companies that present risks that an investment adviser researching individual securities might seek to avoid.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The bar chart and the table below provide some indication of the risks of investing in the fund. The bar chart shows how the fund’s performance has varied from year to year. The table shows how the fund’s average annual total returns for different periods compare to the returns of a broad measure of market performance.

The fund acquired the assets and assumed the liabilities of two Transamerica Partners funds, including Transamerica Partners Institutional Stock Index (the "predecessor fund"), on April 21, 2017, and the predecessor fund was the accounting and performance survivor of the reorganizations. This means that the predecessor fund's financial and performance history became the financial and performance history of the fund. In the reorganization of the predecessor fund, former shareholders of the predecessor fund received Class R4 shares of the fund. The performance of Class R4 shares includes the performance of the predecessor fund prior to the reorganizations, and has not been restated to reflect the annual operating expenses of Class R4 shares.

The past performance shown below is for Class R4 shares. Although Class R shares would have similar annual returns as Class R4 shares because the classes are invested in the same underlying master fund, the returns for Class R shares will differ from Class R4 shares to the extent that the classes have different expenses. Performance information for Class R shares will be included in a future prospectus after the class has been in operation for one calendar year.

Absent any applicable fee waivers and/or expense limitations, performance would be lower.

As with all mutual funds, past performance (before and after taxes) is not a prediction of future results. Updated performance information is available on our website at www.transamerica.com/individual/products/mutual-funds/performance/ or by calling 1-888-233-4339.

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

Performance information for Class R shares will be included in a future prospectus after the class has been in operation for one calendar year.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.transamerica.com/individual/products/mutual-funds/performance/

Bar Chart [Heading]

rr_BarChartHeading

Annual Total Returns (calendar years ended December 31) - Class R4

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (periods ended December 31, 2017)

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns may depend on the investor’s individual tax situation and may differ from those shown. After-tax returns may not be relevant if the investment is made through a tax-exempt or tax-deferred account, such as a 401(k) plan.

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management fees

rr_ManagementFeesOverAssets

0.07%

Other expenses

rr_OtherExpensesOverAssets

0.04%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

none

^[1]

1 year

rr_ExpenseExampleYear01

$ 62

5 years

rr_ExpenseExampleYear05

340

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management fees

rr_ManagementFeesOverAssets

0.07%

Other expenses

rr_OtherExpensesOverAssets

0.04%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.06%

^[1]

1 year

rr_ExpenseExampleYear01

$ 31

5 years

rr_ExpenseExampleYear05

196

2008

rr_AnnualReturn2008

(37.16%)

2010

rr_AnnualReturn2010

14.77%

2012

rr_AnnualReturn2012

15.71%

2014

rr_AnnualReturn2014

13.33%

2016

rr_AnnualReturn2016

11.66%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

16.03%

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

1 Year

rr_AverageAnnualReturnYear01

21.48%

10 Years

rr_AverageAnnualReturnYear10

8.23%

1 Year

rr_AverageAnnualReturnYear01

20.34%

10 Years

rr_AverageAnnualReturnYear10

7.41%

1 Year

rr_AverageAnnualReturnYear01

12.74%

10 Years

rr_AverageAnnualReturnYear10

6.25%

1 Year

rr_AverageAnnualReturnYear01

21.83%

10 Years

rr_AverageAnnualReturnYear10

8.50%


		FORM N-1A
		REGISTRATION STATEMENT *UNDER* *THE SECURITIES ACT OF 1933*		☒
		Pre-Effective Amendment No.		☐
		Post-Effective Amendment No. 258		☒
		and/or
		REGISTRATION STATEMENT *UNDER* *THE INVESTMENT COMPANY ACT OF 1940*		☒
		Amendment No. 259


TRANSAMERICA FUNDS

By:		/s/ Marijn P. Smit
		Marijn P. Smit
		Trustee, President and Chief Executive Officer


/s/ Marijn P. Smit		Trustee, President and Chief Executive Officer	May 15, 2018
Marijn P. Smit

/s/ Sandra N. Bane		Trustee	May 15, 2018
Sandra N. Bane*

/s/ Leo J. Hill		Trustee	May 15, 2018
Leo J. Hill*

/s/ David W. Jennings		Trustee	May 15, 2018
David W. Jennings*

/s/ Russell A. Kimball, Jr.		Trustee	May 15, 2018
Russell A. Kimball, Jr.*

/s/ Fredric A. Nelson III		Trustee	May 15, 2018
Fredric A. Nelson III*

/s/ John E. Pelletier		Trustee	May 15, 2018
John E. Pelletier*

/s/ Patricia L. Sawyer		Trustee	May 15, 2018
Patricia L. Sawyer*

/s/ John W. Waechter		Trustee	May 15, 2018
John W. Waechter*

/s/ Alan F. Warrick		Trustee	May 15, 2018
Alan F. Warrick*

/s/ Vincent J. Toner		Vice President, Treasurer and Principal Financial	May 15, 2018
Vincent J. Toner		Officer

* By:	/s/ Tané T. Tyler	Vice President, Associate General Counsel, Chief Legal Officer and Secretary	May 15, 2018
	Tané T. Tyler**

** Attorney-in-fact pursuant to power of attorney, filed previously.


Exhibit Number		Description of Exhibit

EX-101.INS		XBRL Instance Document

EX-101.CAL		XBRL Taxonomy Calculation Linkbase Document

EX-101.DEF		XBRL Taxonomy Extension Definition Linkbase Document

EX-101.LAB		XBRL Taxonomy Extension Labels Linkbase Document

EX-101.SCH		XBRL Taxonomy Extension Schema Document

EX-101.PRE		XBRL Taxonomy Presentation Linkbase Document