0000081248 pmmf1:S000006251Member 2012-01-31 2013-01-30 0000081248 2012-01-31 2013-01-30 0000081248 pmmf1:S000006569Member 2012-01-31 2013-01-30 0000081248 pmmf1:S000006569Member pmmf1:C000017921Member 2012-01-31 2013-01-30 0000081248 pmmf1:S000006251Member pmmf1:C000017192Member 2012-01-31 2013-01-30 0000081248 pmmf1:S000006251Member pmmf1:C000017193Member 2012-01-31 2013-01-30 0000081248 pmmf1:S000006251Member pmmf1:C000017194Member 2012-01-31 2013-01-30 0000081248 pmmf1:S000006251Member pmmf1:C000017195Member 2012-01-31 2013-01-30 0000081248 pmmf1:S000006251Member pmmf1:C000017196Member 2012-01-31 2013-01-30 0000081248 pmmf1:S000006251Member pmmf1:C000017191Member 2012-01-31 2013-01-30 0000081248 pmmf1:S000006251Member pmmf1:LipperMoneyMarketFundMember 2012-01-31 2013-01-30 0000081248 pmmf1:S000006569Member pmmf1:LipperTaxExemptMoneyMarketFundsCategoryAverageNoDeductionForTaxesMember 2012-01-31 2013-01-30 pure iso4217:USD <div style="display:none">~ http://www.putnam.com/role/ScheduleAverageAnnualTotalReturnsTransposedPUTNAMMONEYMARKETFUND column period compact * ~</div> <b>Fund summaries<br/><br/>PUTNAM MONEY MARKET FUND</b> 2013-01-30 485BPOS PUTNAM MONEY MARKET FUND 2013-01-28 2013-01-30 false 2012-09-30 <b>Goal</b> Putnam Money Market Fund seeks as high a rate of current income as Putnam Investment Management, LLC believes is consistent with preservation of capital and maintenance of liquidity. <b>Fees and expenses</b> The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. <b>Shareholder fees </b>(fees paid directly from your investment) <div style="display:none">~ http://www.putnam.com/role/ScheduleShareholderFeesPUTNAMTAXEXEMPTMONEYMARKETFUND column period compact * ~</div> <div style="display:none">~ http://www.putnam.com/role/ScheduleAnnualFundOperatingExpensesPUTNAMTAXEXEMPTMONEYMARKETFUND column period compact * ~</div> <div style="display:none">~ http://www.putnam.com/role/ScheduleExpenseExampleTransposedPUTNAMTAXEXEMPTMONEYMARKETFUND column period compact * ~</div> <div style="display:none">~ http://www.putnam.com/role/ScheduleAverageAnnualTotalReturnsTransposedPUTNAMTAXEXEMPTMONEYMARKETFUND column period compact * ~</div> <b>Annual fund operating expenses</b><br/> (expenses you pay each year as a percentage of the value of your investment) <b>Example</b> The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#8217;s operating expenses remain the same. Your actual costs may be higher or lower. <b>Investments</b> We invest mainly in money market instruments that are high quality and have short-term maturities. We invest significantly in certificates of deposit, commercial paper (including asset-backed commercial paper), U.S. government debt and repurchase agreements, corporate obligations and bankers acceptances. We may also invest in U.S. dollar denominated foreign securities of these types. We may consider, among other factors, credit and interest rate risks, as well as general market conditions, when deciding whether to buy or sell investments. The effects of inflation may erode the value of your investment over time. Although the fund seeks to preserve the value of your investment at $1.00 per share, deterioration in the credit quality of issuers whose securities the fund holds or an increase in interest rates may impair the value of your investment, and it is possible to lose money by investing in the fund. The values of money market investments usually rise and fall in response to changes in interest rates. Interest rate risk is generally lowest for investments with short maturities (a significant part of the fund&#8217;s investments). Although the fund only buys high quality investments, investments backed by a letter of credit have the risk that the provider of the letter of credit will not be able to fulfill its obligations to the issuer.<br/><br/>The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. <b>Risks</b> 0 <b>Performance </b> 0.01 The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund&#8217;s performance year to year and over time. Please remember that past performance is not necessarily an indication of future results. Monthly performance figures for the fund are available at putnam.com. 0.003 0 0.0028 <b>Average annual total returns</b><br/>(for periods ending 12/31/12) 0.0058 <b>Goal</b> -0.0003 <b>Annual total returns for class A shares</b> Putnam Tax Exempt Money Market Fund seeks as high a rate of current income, exempt from federal income tax, as Putnam Investment Management, LLC believes is consistent with preservation of capital and maintenance of liquidity. 0.0055 <b>Fees and expenses</b> <b>Example</b> 56 The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#8217;s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower. 183 321 723 <div style="sans-serif"><table style="font-size:10pt" cellspacing="0" border="0" cellpadding="0" width="100%"> <tr><td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 0px solid" width="20%">Best calendar<br/>quarter<br/><b>Q3 2007</b></td> <td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 0px solid" width="5%">1.26%</td><td width="40%"></td><td width="35%"></td> </tr> <tr><td width="20%">Worst calendar<br/>quarter<br/><b>Q4 2012</b></td> <td width="8%">0.00%</td><td width="40%"></td><td width="35%"></td> </tr></table></div> <b>Performance</b> The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund&#8217;s performance year to year and over time. Please remember that past performance is not necessarily an indication of future results. Monthly performance figures for the fund are available at putnam.com. Class B share performance does not reflect conversion to class A shares. 0.0056 0.0059 0.0186 0.0292 0.0314 0.0174 0.0006 0.0003 0.0001 0.0001 <div style="display:none">~ http://www.putnam.com/role/ScheduleAnnualTotalReturnsPUTNAMTAXEXEMPTMONEYMARKETFUNDBarChart column period compact * ~</div> 0 0 0 0 0 0 0.01 0.05 0.01 0.0015 0 0 0.003 <b>PUTNAM TAX EXEMPT MONEY MARKET FUND</b> 0.003 0.003 0.003 0.003 0.003 The following table describes the fees and expenses you may pay if you buy and hold shares of the fund. <b>Shareholder fees</b> (fees paid directly from your investment) <b>Annual fund operating expenses</b><br/>(expenses you pay each year as a percentage of the value of your investment) <b>Investments</b> 0 We invest mainly in money market instruments that pay interest that is exempt from federal income tax but may be subject to the federal alternative minimum tax (AMT), are high quality and have short-term maturities. We may consider, among other factors, credit and interest rate risks, as well as general market conditions, when deciding whether to buy or sell investments. 0.005 0.005 0.0015 <b>Risks</b> 0.005 0.0025 The effects of inflation may erode the value of your investment over time. Although the fund seeks to preserve the value of your investment at $1.00 per share, deterioration in the credit quality of issuers whose securities the fund holds or an increase in interest rates may impair the value of your investment, and it is possible to lose money by investing in the fund. The values of money market investments usually rise and fall in response to changes in interest rates. Interest rate risk is generally lowest for investments with short maturities (a significant part of the fund&#8217;s investments). Although the fund only buys high quality investments, investments backed by a letter of credit have the risk that the provider of the letter of credit will not be able to fulfill its obligations to the issuer. The amount of information about issuers of tax exempt debt may not be as extensive as that which is available about companies whose securities are publicly traded. Interest the fund receives might be taxable.<br/><br/>The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. <div style="sans-serif"><table style="font-size:10pt" cellspacing="0" border="0" cellpadding="0" width="100%"> <tr><td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 0px solid" width="20%">Best calendar<br/>quarter<br/><b>Q2 2007</b></td> <td style="BORDER-BOTTOM: #000000 1px solid; BORDER-LEFT: #000000 0px solid" width="5%">0.81%</td><td width="40%"></td><td width="35%"></td> </tr> <tr><td width="20%">Worst calendar<br/>quarter<br/><b>Q4 2010</b></td> <td width="8%">0.00%</td><td width="40%"></td><td width="35%"></td> </tr></table></div> 0.0022 0.0022 0.0022 0.0022 0.0022 0.0022 0.0052 0.0102 0.0102 0.0067 0.0102 0.0077 Although the fund seeks to preserve the value of your investment at $1.00 per share, deterioration in the credit quality of issuers whose securities the fund holds or an increase in interest rates may impair the value of your investment, and it is possible to lose money by investing in the fund. January 30, 2014 An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund&#8217;s performance year to year and over time. Please remember that past performance is not necessarily an indication of future results. putnam.com <b>Annual total returns for class A shares</b> Best calendar quarter 2007-06-30 0.0081 Worst calendar quarter 2010-12-31 0 53 104 104 68 104 79 <b> Average annual total returns</b><br/>(for periods ending 12/31/12) 167 325 325 214 325 246 291 563 563 373 428 563 653 1106 1248 835 1248 954 0.0072 0.0091 0.0281 0.0471 0.0001 0.0497 0.0037 0.0108 0.0271 0.0029 0.0005 0.0001 0.0001 0.0001 -0.0499 -0.0099 0.0001 0.0001 0.0002 0.0001 0.006 0.0007 0.0047 0.0047 0.0053 0.0047 0.0056 0.017 0.0138 0.0138 0.016 0.0153 0.0145 0.0139 0.0001 0.004 0.011 An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, deterioration in the credit quality of issuers whose securities the fund holds or an increase in interest rates may impair the value of your investment, and it is possible to lose money by investing in the fund. The performance information below gives some indication of the risks associated with an investment in the fund by showing the fund&#8217;s performance year to year and over time. Please remember that past performance is not necessarily an indication of future results. putnam.com Best calendar quarter 2007-09-30 0.0126 Worst calendar quarter 0 2012-12-31 <div style="display:none">~ http://www.putnam.com/role/ScheduleAnnualTotalReturnsPUTNAMMONEYMARKETFUNDBarChart column period compact * ~</div> 0000081248 <div style="display:none">~ http://www.putnam.com/role/ScheduleShareholderFeesPUTNAMMONEYMARKETFUND column period compact * ~</div> <div style="display:none">~ http://www.putnam.com/role/ScheduleAnnualFundOperatingExpensesPUTNAMMONEYMARKETFUND column period compact * ~</div> <div style="display:none">~ http://www.putnam.com/role/ScheduleExpenseExamplePUTNAMMONEYMARKETFUND column period compact * ~</div> it is possible to lose money by investing in the fund. it is possible to lose money by investing in the fund. A deferred sales charge on class A shares may apply to certain redemptions of shares purchased by exchange from another Putnam fund. Reflects Putnam Investment Management, LLC's contractual obligation to limit certain fund expenses through January 30, 2014. This obligation may be modified or discontinued only with approval of the Board of Trustees. A deferred sales charge on class A, B, C and T shares may apply to certain redemptions of shares purchased by exchange from another Putnam fund. A deferred sales charge on class M shares may apply to redemptions of shares from certain rollover accounts.