485BPOS

As filed with the Securities and Exchange Commission on November 15, 2013

Registration No. 33-56339

811-07237

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933	x
Pre-Effective Amendment No.	¨
Post-Effective Amendment No. 133	x

and

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No. 131	x

(Check appropriate box or boxes)

PUTNAM INVESTMENT FUNDS

(Exact Name of Registrant as Specified in Charter)

One Post Office Square, Boston, Massachusetts 02109

(Address of Principal Executive Offices)

Registrant’s Telephone Number, including Area Code

(617) 292-1000

It is proposed that this filing will become effective (check appropriate box)

¨ immediately upon filing pursuant to paragraph (b)

x on November 1, 2013 pursuant to paragraph (b)

¨ 60 days after filing pursuant to paragraph (a) (1)

¨ on (date) pursuant to paragraph (a) (1)

¨ 75 days after filing pursuant to paragraph (a) (2)

¨ on (date) pursuant to paragraph (a) (2) of Rule 485.

If appropriate, check the following box:

¨ this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Robert T. Burns, Vice President

Putnam Investment Funds

One Post Office Square

Boston, Massachusetts 02109

(Name and Address of Agent for Service)

Copy to:

John W. Gerstmayr, Esquire

Ropes & Gray LLP

Prudential Tower

800 Boylston Street

Boston, Massachusetts 02199

This Post-Effective Amendment relates solely to the Registrant’s Putnam Small Cap Value Fund series. Information contained in the Registrant’s Registration Statement relating to any other series of the Registrant is neither amended nor superseded hereby.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement under Rule 485(b) under the Securities Act of 1933 and has duly caused this Amendment to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Boston, and The Commonwealth of Massachusetts, on the 15^th day of November, 2013.

Putnam Investment Funds
By:	/s/  Jonathan S. Horwitz
	Jonathan S. Horwitz, Executive Vice President, Principal Executive Officer and Compliance Liaison

Pursuant to the requirements of the Securities Act of 1933, this Amendment to the Registration Statement of Putnam Investment Funds has been signed below by the following persons in the capacities and on the dates indicated:

Signature	Title
Jameson A. Baxter*	Chair, Board of Trustees
Robert L. Reynolds*	President and Trustee
Jonathan S. Horwitz*	Executive Vice President, Principal Executive Officer and Compliance Liaison
Steven D. Krichmar*	Vice President and Principal Financial Officer
Janet C. Smith*	Vice President, Principal Accounting Officer and Assistant Treasurer
Liaquat Ahamed*	Trustee
Ravi Akhoury*	Trustee
Barbara M. Baumann*	Trustee
Charles B. Curtis*	Trustee
Robert J. Darretta*	Trustee
Katinka Domortoffy*	Trustee
John A. Hill*	Trustee

Paul L. Joskow*	Trustee
Kenneth R. Leibler*	Trustee
Robert E. Patterson*	Trustee
George Putnam, III*	Trustee
W. Thomas Stephens*	Trustee

By:	/s/  Jonathan S. Horwitz,
	as Attorney-in-Fact November 15, 2013
	*  Signed pursuant to power of attorney filed in Post-Effective Amendment No. 122 to the Registrant’s Registration Statement on November 26, 2012.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	PUTNAM INVESTMENT FUNDS
Prospectus Date	rr_ProspectusDate	Jun. 30, 2013
Document Creation Date	dei_DocumentCreationDate	Nov. 01, 2013

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

PUTNAM INVESTMENT FUNDS

Prospectus Date

rr_ProspectusDate

Jun. 30, 2013

Supplement [Text Block]

pif_SupplementTextBlock

The fund will offer class R5 and class R6 shares to employer-sponsored retirement plans beginning on November 1, 2013. The prospectus is supplemented as follows to add information about class R5 and class R6 shares.

The front cover page is supplemented to add class R5 and class R6 shares to the list of shares to which the prospectus relates, and to indicate that fund symbols for class R5 and class R6 shares are pending.

The following information is added to Fees and expenses:

Shareholder fees (fees paid directly from your investment)

	Maximum sales charge (load)	Maximum deferred sales charge (load) (as
	imposed on purchases (as a	a percentage of original purchase price or
Share class	percentage of offering price)	redemption proceeds, whichever is lower)
Class R5	NONE	NONE
Class R6	NONE	NONE

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

					Total
		Distribution		Acquired	annual fund
	Management	and service	Other	fund fees and	operating
Share class	fees	(12b-1) fees	expenses	expenses	expenses
Class R5	0.64%	N/A	0.24% <	0.10%	0.98%
Class R6	0.64%	N/A	0.14% <	0.10%	0.88%

< Other expenses are based on expenses of class A shares for the fund’s last fiscal year, adjusted to reflect the lower investor servicing fees applicable to class R5 and class R6 shares.

Example

Share class	1 year	3 years	5 years	10 years
Class R5	$100	$312	$542	$1,201
Class R6	$90	$281	$488	$1,084

Putnam Small Cap Value Fund

Risk/Return:

rr_RiskReturnAbstract

Supplement [Text Block]

pif_SupplementTextBlock

The fund will offer class R5 and class R6 shares to employer-sponsored retirement plans beginning on November 1, 2013. The prospectus is supplemented as follows to add information about class R5 and class R6 shares.

The front cover page is supplemented to add class R5 and class R6 shares to the list of shares to which the prospectus relates, and to indicate that fund symbols for class R5 and class R6 shares are pending.

The following information is added to Fees and expenses:

Shareholder fees (fees paid directly from your investment)

	Maximum sales charge (load)	Maximum deferred sales charge (load) (as
	imposed on purchases (as a	a percentage of original purchase price or
Share class	percentage of offering price)	redemption proceeds, whichever is lower)
Class R5	NONE	NONE
Class R6	NONE	NONE

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

					Total
		Distribution		Acquired	annual fund
	Management	and service	Other	fund fees and	operating
Share class	fees	(12b-1) fees	expenses	expenses	expenses
Class R5	0.64%	N/A	0.24% <	0.10%	0.98%
Class R6	0.64%	N/A	0.14% <	0.10%	0.88%

< Other expenses are based on expenses of class A shares for the fund’s last fiscal year, adjusted to reflect the lower investor servicing fees applicable to class R5 and class R6 shares.

Example

Share class	1 year	3 years	5 years	10 years
Class R5	$100	$312	$542	$1,201
Class R6	$90	$281	$488	$1,084

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

Other expenses are based on expenses of class A shares for the fund’s last fiscal year, adjusted to reflect the lower investor servicing fees applicable to class R5 and class R6 shares.

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Putnam Small Cap Value Fund | Class R5

Risk/Return:

rr_RiskReturnAbstract

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

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

Management fees

rr_ManagementFeesOverAssets

0.64%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.24%

^[1]

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.10%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.98%

1 year

rr_ExpenseExampleYear01

$ 100

3 years

rr_ExpenseExampleYear03

312

5 years

rr_ExpenseExampleYear05

542

10 years

rr_ExpenseExampleYear10

1,201

Putnam Small Cap Value Fund | Class R6

Risk/Return:

rr_RiskReturnAbstract

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

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (load) (as a percentage of original purchase price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOther

none

Management fees

rr_ManagementFeesOverAssets

0.64%

Distribution and service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

Other expenses

rr_OtherExpensesOverAssets

0.14%

^[1]

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.10%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.88%

1 year

rr_ExpenseExampleYear01

90

3 years

rr_ExpenseExampleYear03

281

5 years

rr_ExpenseExampleYear05

488

10 years

rr_ExpenseExampleYear10

$ 1,084

[1] Other expenses are based on expenses of class A shares for the fund’s last fiscal year, adjusted to reflect the lower investor servicing fees applicable to class R5 and class R6 shares.

XML

The fund will offer class R5 and class R6 shares to employer-sponsored retirement plans beginning on November 1, 2013. The prospectus is supplemented as follows to add information about class R5 and class R6 shares.

The front cover page is supplemented to add class R5 and class R6 shares to the list of shares to which the prospectus relates, and to indicate that fund symbols for class R5 and class R6 shares are pending.

The following information is added to Fees and expenses:

Shareholder fees (fees paid directly from your investment)

	Maximum sales charge (load)	Maximum deferred sales charge (load) (as
	imposed on purchases (as a	a percentage of original purchase price or
Share class	percentage of offering price)	redemption proceeds, whichever is lower)
Class R5	NONE	NONE
Class R6	NONE	NONE

Annual fund operating expenses
(expenses you pay each year as a percentage of the value of your investment)

					Total
		Distribution		Acquired	annual fund
	Management	and service	Other	fund fees and	operating
Share class	fees	(12b-1) fees	expenses	expenses	expenses
Class R5	0.64%	N/A	0.24% <	0.10%	0.98%
Class R6	0.64%	N/A	0.14% <	0.10%	0.88%

< Other expenses are based on expenses of class A shares for the fund’s last fiscal year, adjusted to reflect the lower investor servicing fees applicable to class R5 and class R6 shares.

Example

Share class	1 year	3 years	5 years	10 years
Class R5	$100	$312	$542	$1,201
Class R6	$90	$281	$488	$1,084

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Feb. 28, 2013
Registrant Name	dei_EntityRegistrantName	PUTNAM INVESTMENT FUNDS
Central Index Key	dei_EntityCentralIndexKey	0000932101
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Nov. 01, 2013
Document Effective Date	dei_DocumentEffectiveDate	Nov. 01, 2013
Prospectus Date	rr_ProspectusDate	Jun. 30, 2013