PUTNAM TAX FREE INCOME TRUST /MA/
N-30D, 1994-03-28
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(LOGO)

Putnam 
Tax-Free 
Insured 
Fund 

Semiannual 
Report 
January 31, 1994 

(ARTWORK)

For investors seeking 
high current income 
free from federal income 
tax through investments 
in high-quality 
tax-exempt securities 

A member 
of the Putnam 
Family of Funds 

          Contents 
 2        How your fund performed 
 4        Report from Putnam Management 
          Semiannual Report 
 7        Portfolio of investments owned 
16        Financial statements 
23        Fund performance supplement 

<PAGE>
How your 
fund performed 

For periods ended January 31, 1994 

 Total return*             Fund                  Lehman 
                      (class B shares)   Municipal Bond 
                       NAV       CDSC             Index      CPI 
- ---------------------------------------------------------------- 
6 months               5.02%      0.02%            5.91%     1.24% 
1 year                11.23       6.23            12.26      2.53 
5 years               52.43      50.43            61.37     20.73 
 annualized            8.80       8.51            10.04      3.84 
Life-of-fund         116.02     116.02           135.16     35.37 
 annualized            9.61       9.61            10.73      3.68 
- ---------------------------------------------------------------- 

- ----------------------------------------------------------- 
                               Class B         Class A 
Share data                         NAV       NAV        POP 
- ----------------------------------------------------------- 
July 31, 1993                   $15.50      --         -- 
September 20, 1993                --      $15.88     $16.67 
January 31, 1994                 15.80     15.79      16.58 
- ----------------------------------------------------------- 

- ----------------------------------------------------------------------------- 
Distributions+                                    Capital gains 
                                   Investment    Short-    Long- 
                           Number      Income      term     term        Total 
- ----------------------------------------------------------------------------- 
Class B: 
  7/31/93-1/31/94               7   $0.371130    $0.013   $0.085    $0.469130 
Class A: 
  9/20/93-1/31/94               5    0.314439     0.013    0.085     0.412439 
- ----------------------------------------------------------------------------- 

 --------------------------------------------------------------- 
Current returns at the end of the period 
- --------------------------------------------------------------- 
                               Class B     Taxable equivalents++ 
                                  NAV                        NAV 
- --------------------------------------------------------------- 
Current dividend rate             4.61%                     7.63% 
Current 30-day yield              4.14                      6.85 
- --------------------------------------------------------------- 

* Performance data represent past results. Investment return and principal 
value will fluctuate so that an investor's shares, when redeemed, may be 
worth more or less than their original cost. The fund began operations 
September 9, 1985, offering shares now known as class B. On September 20, 
1993, the fund began offering class A shares. Performance for each share 
class will differ. 

+ Capital gains are taxable and income from this fund may be subject to the 
alternative minimum tax and/or state and local taxes. 
++ Taxable equivalent rates cited assume the maximum federal tax rate of 
39.6%. Results for investors subject to lower tax rates would not be as 
advantageous, although many such investors would have the opportunity to 
receive attractive tax benefits from a fund investment. Consult your tax 
advisor for more guidance. 

Please see the fund performance supplement on page 23 for total return at the 
end of the most recent calendar quarter and additional information about 
performance comparisons 

Terms you need to know 

Total return is the change in value of an investment from the beginning to 
the end of a period, assuming the reinvestment of all distributions. It may 
be shown at net asset value or at public offering price. 

Net asset value (NAV) is the value of all your fund's assets, minus any 
liabilities, divided by the number of outstanding shares, not reflecting any 
sales charge. 

Public offering price (POP) is the price of a mutual fund share plus the 
maximum sales charge levied at the time of purchase. 

Contingent deferred sales charge (CDSC) is a charge applied at the time of 
the redemption of shares rather than the time of purchase. It generally 
declines and eventually disappears over a stated period. 

Class A shares are the shares of your fund offered subject to an initial 
sales charge. Your fund's POP includes the maximum 4.75% sales charge. 

Class B shares are the shares of your fund offered with no initial sales 
charge. Within the first six years of purchase, they are subject to a CDSC 
declining from 5% to 1%. After the sixth year, the CDSC no longer applies. 

Current dividend rate is calculated by annualizing the net investment income 
paid to shareholders in the fund's most recent distribution, then dividing by 
the NAV or POP on the last day of the period. 

Current 30-day yield, based only on the fund's net investment income 
earnings, is calculated in accordance with Securities and Exchange Commission 
guidelines. 

Taxable equivalent return is the rate at which a taxable investment would 
have to generate income to equal the fund's current dividend rate or yield. 

<PAGE>

From the 
Chairman 

(George Putnam photo) 

George Putnam 
Chairman of the Trustees 
(C) Karsh, Ottawa 

Dear Shareholder: 

In the six months ended January 31, 1994, Putnam Tax-Free Insured Fund 
continued to provide attractive tax-free income and total return performance 
with its portfolio of high-quality investments. The portfolio quality is 
reflected in the fund's AAAf rating from Standard & Poor's,(R) the highest 
available for a mutual fund. 

The past six months have been characterized by modest growth in the U.S. 
economy, low interest rates, and a low rate of inflation. Amid this 
encouraging investment environment, the municipal bond market flourished, 
delivering some of its strongest performance in decades. Your fund's 
proactive strategy of timely trading based on relative values and regional 
supply/demand imbalances enabled it to benefit fully from these market 
conditions. 

In closing, I would like to draw your attention to the new format of this 
report. Previous reports contained information on both of the portfolios that 
compose Putnam Tax-Free Income Trust: Putnam Tax-Free High Yield Fund and 
Putnam Tax-Free Insured Fund. Now, each fund will publish its own report, 
thereby saving shareholders of only one fund the time and trouble of sorting 
through information not directly related to their investment. 

The following Report from Putnam Management contains fund manager Richard 
Wyke's overview of the past six months and his insight into what 
lies ahead. 

Respectfully yours, 

(SIGNATURE) 

George Putnam 
March 16, 1994 

<PAGE>

Report from 
Putnam Management 

Building on its well-established record of dependable performance, Putnam 
Tax-Free Insured Fund provided shareholders with solid tax-free income over 
the six-month period ended January 31, 1994. At the same time, the fund 
maintained its superior AAAf rating from Standard & Poor's, providing a 
measure of security for quality-conscious investors. This is the highest 
possible rating for a mutual fund based on the S&P(R) assessment of portfolio 
quality. Of course, it does not guarantee the fund's market value nor 
constitute approval of the shares. 

The current dividend rate for class B shares on January 31, 1994, was 4.61%, 
based on net asset value. For an investor in the new maximum 39.6% federal 
tax bracket,* a fully taxable investment would have had to earn 7.63% to 
equal the tax-free yields of this portfolio. Compare this level of after-tax 
income with the 6.23% yield for 30-year Treasury bonds as of that date to 
recognize the full advantage of tax-exempt investing. 

Muni market strengthens The municipal bond market's strength remained in 
evidence during the fund's semiannual period. The U.S. economy grew at a 
moderate rate while inflation and interest rates remained low. The entire 
fixed-income market responded positively to this environment, rallying almost 
daily from June through September. Bond prices increased as yields on U.S. 
Treasury securities reached 20-year lows, while yields on insured municipal 
bonds, like those in which your fund invests, approached their lowest levels 
in more than a decade. 

In November and December, the Treasury market corrected. The insured 
municipal bond market followed suit. Still, the relative value of municipal 
securities was so compelling that in January these securities began to 
outperform Treasuries on an after-tax basis. In fact as the semiannual period 
drew to a close, municipal bond values actually began to appreciate from 
their December lows while Treasury values remained flat. 

High-quality portfolio An investment in a municipal bond mutual fund exposes 
an investor to some risk, not the least of which is credit risk. Credit risk 
involves the possibility that the issuer of a debt obligation will default. 
Only the U.S. Treasury's bonds, notes, and bills are considered free of 
credit risk. 

The credit risk of this fund's holdings has been significantly reduced, 
however. This fund invests in high-quality, 

- ----------------------
* Results for investors subject to lower tax rates would not be as advantageous,
  although many could receive tax benefits from a fund investment. Consult your
  tax advisor for more guidance. 


<PAGE>

tax-exempt bonds and notes. Each security that we purchase is either rated 
AAA, or backed by the full faith and credit of the U.S. government or covered 
by insurance guaranteeing the timely payment of principal and interest. At 
least 70% of the fund's holdings are insured. 

Compelling dynamics The recent relative outperformance of municipal bonds 
over U.S. Treasuries has been rooted largely in a favorable supply/demand 
relationship. For more than two years, the supply of municipal bonds has 
surged as municipalities took advantage of low interest rates, to refinance 
existing debt issued at higher interest rates. 

In January 1994, the pace of this refinancing finally began to slow. At the 
same time, investor demand for municipal bonds has continued to grow. With so 
many other shelters now gone, municipal bonds have become one of the last tax 
refuges for investment income. Their current after-tax yield advantage has 
further increased investor demand. The resulting imbalance helped boost bond 
prices, and in turn, the fund's net asset value, throughout the period. 



(BAR CHART)


Top industry sectors (1/31/94) 
- ------------------------------
Hospitals/Healthcare     17.6% 
Housing                  17.2 
Utilities                15.8 
Water & Sewer            10.4 

Regional opportunities Regional supply/demand relationships continue to play 
an important role in our investment strategy. For example, over the past six 
months, we discovered some excellent values in California-insured municipal 
securities. Abundant supply made these securities particularly attractive, 
and the growing appetite of California investors for insured investments 
should make these securities strong performers in the months ahead. 

Our recent California securities purchase also highlights a new strategy of 
seeking investments in states with higher taxes and where we expect higher 
investor demand for tax-free income. If, as we expect, the supply of 
municipal securities wanes, insured bonds issued by higher-tax, high-demand 
states should perform particularly well. Thus far, we have found such 
opportunities only in California. However, we are currently evaluating 
investments with similar characteristics in New York, Minnesota, and Florida. 

<PAGE>

Looking ahead We are maintaining our positive outlook for the municipal bond 
market as a whole. Although there can never be any assurance, the market's 
shift in the supply/demand balance toward higher demand should lead to strong 
performance by insured bonds, especially those from higher-tax states and a 
continuation of the relative advantage of tax-free yields over yields on 
comparable taxable investments. 

Going forward, we expect more of an income emphasis--reflecting the 
beginnings of a trend toward higher interest rates. Rates began moving upward 
after the end of the semiannual period and, while they may go somewhat 
higher, there seems to be no serious inflationary threat driving the shift. 
In this climate, municipal bonds should continue to provide solid income but 
not the significant price appreciation we have seen in recent years. Your 
fund's emphasis on regions and states with favorable supply/demand dynamics 
and its somewhat higher-yielding portfolio position it well for what we see 
ahead. 

<PAGE>

Portfolio of 
investments owned 
January 31, 1994 (Unaudited) 


<TABLE>
<CAPTION>

Municipal Bonds and Notes (99.1%)(a) 

Principal Amount                                                                                     Rating (b)            Value 
- -------------------------------------------------------------------------------------------------------------------------------- 
<S>              <C>                                                                                <C>               <C>
Alaska (0.3%) 
$ 1,490,000      AK Hsg. Fin. Corp. Rev. Bonds Ser. A, Government National Mortgage Assn. 
                   (GNMA) Coll., 8-3/8s, 12/1/16                                                    AAA               $ 1,558,913 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Arizona (4.3%) 
                 AZ Muni. Fin. Program Certif. of Participation 
  1,000,000       Ser. 31, Bond Investors Guaranty Insurance Co. (BIGI), 7-1/4s, 8/1/09              AAA                1,232,500 
   
  5,700,000       Ser. 34, BIGI, 7-1/4s, 8/1/09                                                     AAA                 7,025,250 
   
 16,000,000      Pima Cnty., Indl. Dev. Auth. Rev. Bonds (Tucson Elec Pwr. Co.), Ser. A, 
                   Financial Security Assurance, Inc. (FSA), 7-1/4s, 7/15/10(c)                     AAA                18,220,000 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       26,477,750 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
California (12.4%) 
  3,850,000      CA Hlth. Fac. Fin. Auth. Insd. Rev. Bonds (Catholic), Ser. B, American 
                   Municipal Bond Assurance Corp. (AMBAC), 5s, 7/1/21                               AAA                 3,667,125 
   
                 CA Pub. Works Board Lease Rev. Bonds 
  8,000,000       (U. of CA), Ser. A, AMBAC, 6.4s, 
                   12/1/16                                                                          AAA                 8,740,000 
   
  3,110,000       (Dept. of Corrections-State Prisons), AMBAC, 5s, 12/1/19                          AAA                 3,008,925 
   
  7,000,000      El Cajon, Redev. Agcy. Tax Alloc. Rev. Bonds (El Cajon Redev. Project), 
                   AMBAC, 6.6s, 
                   10/1/22                                                                          AAA                 7,875,000 
   
  3,090,000      LA Cnty., Cap. Asset Leasing Corp. Rev. Bonds AMBAC, 3.85s, 12/1/08                AAA                 3,306,300 
   
                 LA Cnty., Trans. Comm. Sales Tax Rev. Bonds 
  2,500,000       Ser. A, Financial Guaranty Insurance Corp. FGIC, 6-3/4s, 7/1/20                   AAA                 2,946,875 
   
  4,000,000       (Proposition C), Ser. A, (Municipal Bond Insurance Association (MBIA), 
                   6-3/4s, 7/1/19                                                                   AAA                 4,755,000 
   
  3,455,000       (Proposition C), Ser. A, MBIA, 6-1/2s, 7/1/20                                     AAA                 4,046,669 
   
                 LA Cnty., Waste Wtr. Syst. Rev. Bonds Ser. D, FGIC 
  5,000,000       6s, 11/1/14                                                                       AAA                 5,350,000 
   
  5,810,000       5.2s, 11/1/21                                                                     AAA                 5,737,375 
   
  3,250,000      LA Cnty., Convention and Exhibition Ctr. Auth. Lease Rev. Bonds, Ser. A, 
                   MBIA, 5-3/8s, 8/15/18                                                            AAA                 3,262,188 
   
  5,000,000      Sacramento, Muni. Util. Dist. Elec. Rev. Rfdg. Bonds Ser. Y, MBIA, 6-3/4s, 
                   9/1/19                                                                           AAA                 5,912,500 
   
  5,000,000      San Diego, Regl. Bldg. Auth. Lease Residual Interest Bonds (RIBS), MBIA, 
                   3.81s, 5/1/23 (acquired 8/5/93, cost $4,971,000)(d)                              AAA                 5,237,500 


<PAGE>
   
Principal Amount                                                                                     Rating (b)            Value 
- -------------------------------------------------------------------------------------------------------------------------------- 
California (continued) 
$ 6,300,000      U. of CA, Rev. Rfdg. Bonds (Multi-Purpose Projects), Ser. A, MBIA, 6-7/8s, 
                   9/1/16                                                                           AAA               $ 7,189,875 
   
  4,700,000      Vallejo, Wtr. Rev. Bonds (Wtr. Impt. Project), Ser. B, FGIC, 6-1/2s, 11/1/14       AAA                 5,228,750 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       76,264,082 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Colorado (2.0%) 
  4,225,000      CO Hlth. Fac. Auth. Rev. Bonds (Cmnty. Provider Pooled Loan Program), Ser. A, 
                   Capital Guarantee Insurance Co. 7-1/4s, 7/15/17                                  AAA                 4,932,688 
   
  6,895,000      El Paso Cnty., Home Mtge. Rev. Bonds Ser. A, GNMA Coll., 8s, 3/1/21                AAA                 7,351,794 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       12,284,482 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Connecticut (1.1%) 
     1,000,      CT Hlth. & Edl. Fac. Auth. Rev. Bonds (Hosp. of St. Raphael), Ser. H, AMBAC, 
                   6-1/2s, 7/1/13                                                                   AAA                 1,166,250 
   
  5,000,000      South Central CT Regl. Wtr. Auth. Sys. Rev. Bonds 11th Ser., FGIC, 5-3/4s, 
                   8/1/12                                                                           AAA                 5,343,750 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                        6,510,000 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Delaware (0.9%) 
                 DE Econ. Dev. Auth. Poll. Rfdg. Rev. Bonds 
  5,000,000       (Delmarva Pwr.), Ser. B, FGIC, 7.15s, 7/1/18                                      AAA                 5,787,500 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Florida (11.6%) 
$   900,000      Dade Cnty., Hlth. Fac. Auth. Hosp. Rev. Bonds (North Shore Med. Ctr. 
                   Project), AMBAC, 9-1/8s, 
                   10/1/13                                                                          AAA               $ 1,004,625 
   
  3,500,000      FL Muni. Pwr. Agcy. Rev. Bonds (Stanton II Project), AMBAC, 4-1/2s, 10/1/27        AAA                 3,119,375 
   
 13,675,000      Hernando Cnty., Rev. Bonds (Criminal Justice Complex), FGIC, 7.65s, 7/1/16         AAA                18,358,688 
   
  2,000,000      Jacksonville, Hsg. Rev. Bonds (Windermere Manor Apt.), GNMA Coll., 9-1/8s, 
                   9/20/10                                                                          AAA                 2,147,500 
   
  3,500,000      Miami Beach, Hlth. Fac. Auth. Rev. Bonds (Mt. Sinai Med. Ctr. Project), 
                   Capital Guananty Insurance Co., 6-1/8s, 11/15/14                                 AAA                 3,771,250 
   
  5,500,000      Orange Cnty., Hlth. Fac. Auth. RIBS, Ser. 91-C, MBIA, 10.217s, 
                   10/29/21                                                                         AAA                 6,558,750 
   
                 Orange Cnty., Hlth. Fac. Auth. Rev. Bonds (Pooled Hosp. Loan Project) 
    150,000       Ser. A, FGIC, 7-7/8s, 12/1/25                                                     AAA                   169,688 
   
 10,930,000       Ser. B, BIGI, 7-7/8s, 12/1/25                                                     AAA                12,364,563 
   
  5,000,000      Orlando & Orange Cnty. Expressway Auth. Rev. Bonds FGIC, 8-1/4s, 7/1/14            AAA                 6,862,500 
   
 16,495,000      Plantation, Wtr. & Swr. Auth. Rev. Bonds MBIA, zero%, 3/1/07                       AAA                 8,577,400 


<PAGE>
   
Principal Amount                                                                                     Rating (b)            Value 
- -------------------------------------------------------------------------------------------------------------------------------- 
Florida (continued) 
$ 4,000,000      Sumter Cnty., School Dist. Rev. Bonds (Multi Dist. Loan Program), Capital 
                   Guaranty Insurance Co., 7.15s, 11/1/15                                           AAA               $ 5,075,000 
   
  3,000,000      Tampa, Wtr. & Swr. Auth. RIBS, Ser. A-2, FGIC, 9.21s, 10/1/12                      AAA                 3,450,000 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       71,459,339 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Georgia (2.6%) 
  5,000,000      Burke Cnty., Dev. Auth. Poll. Control VRDN (Oglethorpe Power Corp.), Ser. A, 
                   FGIC, 2.1s, 1/1/16                                                               AAA                 5,000,000 
   
 10,000,000      GA Muni. Elec. Pwr. Auth. Rev. Bonds Ser. B, BIGI, zero %, 1/1/08                  AAA                 4,975,000 
   
  5,500,000      GA Muni. Elec. Pwr. Special Rev. Bonds (Project One), AMBAC, 6.4s, 1/1/13          AAA                 6,359,375 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       16,334,375 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Idaho (0.1%) 
    500,000      ID Hlth. Fac. Auth. Rev. Bonds (Kootenai Med. Ctr. Project), MBIA, 9-1/8s, 
                   8/1/15                                                                           AAA                   550,625 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Illinois (5.8%) 
                 Aurora, Hosp. Fac. Rev. Bonds 
    950,000       (Mercy Ctr. Hlth. Care Svcs.), Ser. A, AMBAC, 9-5/8s, Ser. A, AMBAC, 9-5/8s, 
                   10/1/09                                                                          AAA                 1,064,000 
   
  2,600,000      Chicago, Central Pub. Library Rev. Bonds Ser. B, AMBAC, 6.85s, 1/1/17              AAA                 3,081,000 
   
Illinois (continued) 
$ 6,780,000      Chicago, Pub. Bldg. Rev. Bonds (Comnty. Bldg.), Ser. A, MBIA, 7s, 1/1/20           AAA               $ 8,508,900 
   
  5,000,000      Chicago, Res. Mtge. Rev. Bonds Ser. B., MBIA, zero%, 10/1/09                       AAA                 1,743,750 
   
  2,000,000      Chicago, School Fin. Auth. Rev. Rfdg. Bonds FGIC, 8-3/4s, 6/1/09                   AAA                 2,185,000 
   
  2,000,000      Cook Cnty., Rev. Bonds MBIA, 7-1/4s, 11/1/07                                       AAA                 2,437,500 
   
  1,290,000      IL Hlth. Fac. Auth. Rev. Bonds (Elmhurst Mem. Hosp. Project), MBIA, 6-1/2s, 
                   1/1/12                                                                           AAA                 1,407,713 
   
  5,000,000      Metro. Pier & Exposition Auth. Tax Rev. Bonds Ser. A, FGIC, zero%, 6/15/17         AAA                 1,381,250 
   
  9,000,000      Streamwood, Multi-Fam. Rev. Rfdg. Bonds (Southgate Minors Project), Federal 
                   Housing Authority (FHA) Insd., 6.7s, 11/1/28                                     AAA                 9,720,000 
   
  4,005,000      Wheeling, Multi-Fam. Rev. Bonds (Arlington Club Project), Ser. A, FHA Insd., 
                   6.2s, 2/1/14                                                                     AAA                 4,155,188 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       35,684,301 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Indiana (2.9%) 
                 IN Hlth. Fac. Fin. Auth. Hosp. Rev. Bonds 
     7,500,       (Columbus Regl. Hosp.) Capital Guaranty, 7s, 8/15/15                              AAA                 9,056,250 
   
  2,000,000       (Cmnty. Hosp. Project), MBIA, 6.85s, 7/1/22                                       AAA                 2,240,000 


<PAGE>
   
Principal Amount                                                                                     Rating (b)            Value 
- -------------------------------------------------------------------------------------------------------------------------------- 
Indiana (continued) 
$5,000,000       Marion Cnty., Hosp. Auth. Fac. Rev. Bonds (Cmnty. Hosp. Project), MBIA, 9s, 
                   5/1/08                                                                           AAA               $ 5,431,250 
   
 1,000,000       Vigo Cnty., Hosp. Auth. Rev. Bonds (Union Hosp.), AMBAC, 9.3s, 5/1/11              AAA                 1,097,500 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       17,825,000 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Kentucky (0.1%) 
   645,000       KY Hsg. Corp. Multi-Fam. Mtge. Rev. Bonds Ser. A, BIGI, 8-7/8s, 7/1/19             AAA                   673,219 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Louisiana (1.4%) 
 3,940,161       East Baton Rouge, Mtge. Fin. Auth. Single-Fam. Mtge. Bonds, Ser. B, GNMA 
                   Coll., 8-1/4s, 2/25/11                                                           AAA                 4,137,675 
   
                 LA Hsg. Fin. Agcy. Single Fam. Mtge. Rev. Bonds 
   695,000        Ser. 85A, FGIC, 9-3/8s, 2/1/15                                                    AAA                   726,275 
   
 1,580,000        GNMA Coll., 9-1/8s,  11/1/18                                                      AAA                 1,680,725 
   
 1,700,000       New Orleans, Intl. Arpt. Rev. Bonds MBIA, 9s, 8/1/15                               AAA                 1,893,375 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                        8,438,050 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Maryland (1.3%) 
 1,055,000       Baltimore, Pub. Impt. Rev. Bonds Ser. A, MBIA, 7s, 10/15/09                        AAA                 1,279,188 
   
   700,000       Montgomery Cnty., Cmnty. Hsg. Opportunities (Draper Lane Apts.), VRDN, FGIC, 
                   2-1/2s, 2/1/26                                                                   AAA                   700,000 
   
Maryland (continued) 
                 Prince Georges Cnty., Hsg. Auth. Mtge. Rev. Bonds Ser. A 
$2,250,000        (Stevenson Apts. Project), GNMA Coll., 6.35s, 7/20/20                             AAA               $ 2,393,438 
   
 3,500,000        (Timber Ridge/Cypress Creek), GNMA Coll., Ser. A, 6s, 6/20/28                     AAA                 3,526,250 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                        7,898,876 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Massachusetts (2.1%) 
 5,000,000       MA Hlth. & Edl. Fac. Auth. Rev. Bonds (Baystate Med. Ctr.), Ser. D, FGIC, 6s, 
                   7/1/15                                                                           AAA                 5,306,250 
   
                 MA Hsg. Fin. Agcy. Multi-Fam. Hsg. Rev. Bonds 
 1,000,000        Ser. A, MBIA, 8-7/8s, 7/1/18                                                      AAA                 1,060,000 
   
 1,250,000        Ser. D, Federal National Mortgage Association, FNMA, 6-7/8s, 11/15/21             AAA                 1,364,063 
   
 5,200,000       MA Hsg. Fin. Agcy. Rev. Bonds (Hsg. Projects), Ser. A, AMBAC, 5.95s, 10/1/08       AAA                 5,473,000 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       13,203,313 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Michigan (4.0%) 
 1,000,000       Jackson Cnty., Hosp. Fin. Auth. Rev. Bonds (W.A. Foote Mem. Hosp.), Ser. A, 
                   FGIC, 4-3/4s, 6/1/15                                                             AAA                   932,500 
   
   800,000       Kent Cnty., Hosp. Fin. Auth. Fac. Rev. Bonds (Pine Rest Christian Hosp. 
                   Assn.), FGIC, 9s, 11/1/10                                                        AAA                   894,000 


<PAGE>
   
Principal Amount                                                                                     Rating (b)            Value 
- -------------------------------------------------------------------------------------------------------------------------------- 
Michigan (continued) 
                 MI Hsg. Dev. Auth. Multi-Fam. Rev. Bonds Ser. A, FGIC 
$   800,000       8-7/8s, 7/1/17                                                                    AAA               $   837,000 
   
  3,000,000       8-3/8s, 7/1/19                                                                    AAA                 3,183,750 
   
                 MI Strategic Fund Ltd. Oblig. Rev. Bonds (Detroit Edison Co. Project), 
  4,000,000       Ser. BB, AMBAC, 7s, 5/1/21                                                        AAA                 5,105,000 
   
     2,750,       Ser. AA, FGIC, 6.95s, 5/1/11                                                      AAA                 3,324,063 
   
  5,000,000       (Consumers Pwr. Co.  Project), 5.8s, 6/15/10                                      AAA                 5,243,750 
   
  4,735,000      MI Trunk Line Rev. Bonds Ser. A, AMBAC, zero %, 10/1/11                            AAA                 1,822,975 
   
  3,500,000      West Bloomfield, School Dist. Rev Bonds MBIA, 5-1/8s, 5/1/14                       AAA                 3,425,625 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       24,768,663 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Missouri (0.6%) 
  4,000,000      Missouri Hlth. & Ed. Fac. Auth. Rev. Bonds (St. Luke's Health Syst.), MBIA, 
                   5.1s, 11/15/13                                                                   AAA                 3,955,000 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Montana (2.3%) 
 12,000,000      Forsythe, Poll. Control Rev. Rfdg. Bonds (Puget Sound Pwr. & Lt. Project), 
                   AMBAC, 6.8s, 3/1/22                                                              AAA                13,500,000 
   
    500,000      Missoula, Hosp. Fac. Rev. Bonds (Sisters of Charity-St. Patrick), AMBAC, 
                   9.4s, 9/1/12                                                                     AAA                   558,750 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       14,058,750 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Nebraska (2.2%) 
$ 3,000,000      NE Investment Fin. Auth. Hosp. Rev. RIBS MBIA, 10.643s, 11/15/16                   AAA               $ 3,633,750 
   
  1,000,000      NE Investment Fin. Auth. Single Fam. Mtge. RIBS Ser. B, GNMA Coll. 12.606s, 
                   3/15/22                                                                          AAA                 1,172,500 
   
  8,350,000      NE Investment Fin. Auth. Single Fam. Mtge. Rev. Bonds 1st. Ser., GNMA Coll., 
                   MBIA, 8-1/8s, 
                   8/15/38                                                                          AAA                 8,851,000 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       13,657,250 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Nevada (1.5%) 
  3,500,000      Clark Cnty., Poll. Control Rev. Rfdg. Bonds (NV Pwr. Co. Project), Ser. B, 
                   FGIC, 6.6s, 6/1/19                                                               AAA                 3,902,500 
   
  4,500,000      Clark Cnty., School Dist. General Obligation (G.O.) Bonds, Ser. A, MBIA, 7s, 
                   6/1/10                                                                           AAA                 5,456,250 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                        9,358,750 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
New Hampshire (1.1%) 
  3,700,000      NH Higher Ed. & Hlth. Fac. Auth. Rev. Bonds (VHA New England Inc.), Ser. F, 
                   AMBAC, 1.8s, 12/1/25                                                             AAA                 3,700,000 
   
  2,500,000      NH State Tpk. Syst. RIBS FGIC, 11.057s, 11/1/17                                    AAA                 3,306,250 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                        7,006,250 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
New Jersey (1.9%) 
  3,000,000      Middlesex Cnty., Utils. Auth. Swr. RIBS Ser. A, MBIA, 8.85s, 8/15/10               AAA                 3,547,500 


<PAGE>
   
Principal Amount                                                                                     Rating (b)            Value 
- -------------------------------------------------------------------------------------------------------------------------------- 
New Jersey (continued) 
$   105,000      NJ Hlth. Care Fac. Finance Auth. Rev. Bonds (Bayshore Cmnty. Hosp.), Issue A, 
                   MBIA, zero%, 7/1/08                                                              AAA               $    50,925 
   
  8,000,000      Salem Cnty., Indl. Poll. Control Fin. Auth. Rev. Bonds (Pub. Svc. Elec. & Gas 
                   Co. Project), Ser. C, MBIA, 5.55s, 11/1/33                                       AAA                 8,190,000 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       11,788,425 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
New Mexico (0.6%) 
  2,000,000      NM Edl. Assistance Foundation Student Loan Rev. Bonds Ser. A, AMBAC, 6.85s, 
                   4/1/05                                                                           AAA                 2,220,000 
   
  1,375,000      NM Mtge. Fin. Auth. Single Fam. Mtge. Rev. Bonds Ser. C, FGIC, 8-1/2s, 7/1/07      AAA                 1,460,938 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                        3,680,938 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
New York (2.5%) 
    635,000      Erie Cnty., Wtr. Auth. Rev. Rfdg. Bonds AMBAC, zero%, 12/1/17                      AAA                   116,681 
   
 10,000,000      NY City, Muni. Wtr. Fin. Auth. Wtr. & Swr. Syst. Rev. Bonds, Ser. B, FGIC, 
                   7-1/2s, 6/15/11                                                                  AAA                12,675,000 
   
  2,850,000      NY State Med. Care Fac. Fin. Rev. Bonds (Mental Hlth. Svcs.), Ser. F, FSA 
                   Insd., 5-1/4s, 2/15/21                                                           AAA                 2,839,313 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       15,630,994 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
North Carolina (0.8%) 
                 NC Eastern Muni. Pwr. Agcy. Rev. Bonds (Pwr. Syst. Project), Ser. A, FGIC, 
$ 2,540,000       6.2s, 1/1/13                                                                      AAA               $ 2,736,850 
   
  1,800,000       6.2s, 1/1/12                                                                      AAA                 1,939,500 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                        4,676,350 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Ohio (4.6%) 
  7,390,000      Cleveland, Waterworks 1st Mtge. Rev. Bonds Ser. F-92A, AMBAC, 6-1/2s, 1/1/21       AAA                 8,600,113 
   
                 OH Hsg. Fin. Agcy. Single-Fam. Mtge. Rev. Bonds 
  4,319,000       Ser. B, GNMA Coll., 8-1/4s, 12/15/19                                              AAA                 4,378,386 
   
  9,210,000       Ser. C, GNMA Coll., 8-1/8s, 3/1/20                                                AAA                 9,877,725 
   
 15,225,000       Ser. 85-A, FGIC, zero%, 1/15/15                                                   AAA                 2,131,500 
   
                 OH State Wtr. Dev. Auth. Rev. Bonds, AMBAC 
    360,000       9-3/8s, 12/1/18                                                                   AAA                   392,850 
   
  1,020,000       9-3/8s, 6/1/95                                                                    AAA                 1,133,475 
   
  1,400,000      Summit Cnty., Various Purpose Rev. Bonds AMBAC, 6-5/8s, 12/1/12                    AAA                 1,582,000 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       28,096,049 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Oklahoma (1.3%) 
  7,480,000      OK Hsg. Fin. Agcy. Single Fam. Rev. Bonds Ser. A, GNMA Coll., 8-1/4s, 12/1/20      AAA                 7,872,700 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Pennsylvania (7.4%) 
  1,500,000      Blair Cnty., Hosp. Auth. Rev. Bonds (Altoona Hosp. Project), AMBAC, 6-1/2s, 
                   7/1/22                                                                           AAA                 1,653,750 

<PAGE>

   
Principal Amount                                                                                     Rating (b)            Value 
- -------------------------------------------------------------------------------------------------------------------------------- 
Pennsylvania (continued) 
$2,600,000       Coraopolis-Verona Hsg. Dev. Corp. Multi-Fam. Mtge. Rev. Rfdg. Bonds, Ser. A, 
                   FHA Insd., 6s, 1/1/24                                                            AAA               $ 2,694,250 
   
 5,000,000       Delaware Cnty., Hlth. Care Auth. Rev. Bonds (Mercy Hlth. Corp., 
                   Southeastern), Ser. A, 5-1/8s, 11/15/12                                          AAA                 4,856,250 
   
 3,000,000       Falls Township, Hosp. Auth. Rev. Bonds (Delaware Valley Med.), FHA Insd., 
                   6.9s, 8/1/11                                                                     AAA                 3,442,500 
   
 4,000,000       Keystone Oaks, School Dist. Rev. Bonds Ser. C, AMBAC, 5.829s, 9/1/16               AAA                 4,230,000 
   
 5,000,000       PA Certif. of Participation Bonds Ser. A, AMBAC, 5s, 7/1/15                        AAA                 4,862,500 
   
 4,500,000       PA Higher Edl. Fac. Auth. Rev. Bonds (Hahnemann U. Project), MBIA, 7.2s, 
                   7/1/19                                                                           AAA                 5,152,500 
   
 3,215,000       PA Hills, G.O. Bonds AMBAC, 5-7/8s, 12/1/15                                        AAA                 3,383,788 
   
                 Philadelphia, Muni. Auth. Rev. Bonds 
 6,040,000        FGIC, 7.8s, 4/1/18                                                                AAA                 7,331,050 
   
   625,000        FGIC, 7.8s, 4/1/18                                                                AAA                   728,125 
   
 3,000,000       Philadelphia, Regl. Port Auth. Lease RIBS MBIA, 8.15s, 9/1/13 (acquired 
                   1/19/93, cost $3,000,000(d)                                                      AAA                 3,648,750 
   
 3,000,000       Philadelphia, Wtr. & Swr. Rev. Bonds, RIBS VRDN, FGIC, 4.8s, 6/15/05               AAA                 1,286,250 
   
Pennsylvania (continued) 
$2,000,000       Schuylkill Cnty., Redev. Auth. Lease Rev. Bonds Ser. A, FGIC 7-1/8s, 6/1/13        AAA               $ 2,387,500 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       45,657,213 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Rhode Island (0.8%) 
 4,315,000       RI Depositors Econ. Protection Corp. Special Oblig. Ser. A, MBIA, 7-1/4s, 
                   8/1/21                                                                           AAA                 4,784,256 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Tennessee (0.2%) 
   900,000       Metro. Nashville Arpt. Auth. Rev. Bonds FGIC, 9-3/4s, 7/1/15                       AAA                   993,375 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Texas (8.9%) 
    55,000       Bell Cnty., Hsg. Fin. Corp. Single Fam. Mtge. Rev. Bonds FGIC, 9.2s, 12/1/10       AAA                    59,675 
   
 3,000,000       Bexar Cnty., Hsg. Fin. Corp. Multi-Fam. Hsg. Rev. (Sunpark Apt. Project), 
                   FNMA, 6-7/8s, 12/1/12                                                            AAA                 3,240,000 
   
    40,000       Dallas Cnty., Hsg. Fin. Corp. Single Fam. Mtge. Rev. Bonds (Lomas & Nettleton 
                   Co.), FGIC, 9.2s, 7/1/06                                                         AAA                    41,950 
   
   452,000       Dallas, Hsg. Fin. Corp. Single Fam. Mtge. Rev. Bonds MBIA, 10s, 10/1/07            AAA                   471,775 
   
 5,000,000       Harris Cnty., Hosp. Dist. Mtge. Rev. Rfdg. Bonds AMBAC, 7.4s, 2/15/10              AAA                 6,256,250 
   
                 Harris Cnty., Toll Rd. Rev. Bonds 
 3,000,000        Ser. B, FGIC, 6-5/8s, 8/15/11                                                     AAA                 3,251,250 


<PAGE>
   
Principal Amount                                                                                     Rating (b)            Value 
- -------------------------------------------------------------------------------------------------------------------------------- 
Texas (continued) 
$ 4,750,000       Ser. A, AMBAC, 6-1/2s, 8/15/17                                                    AAA               $ 5,230,938 
   
  2,700,000      Houston, Wtr. & Swr. Syst. Rev. Rfdg. Bonds FGIC, 9-3/8s, 12/1/13                  AAA                 3,051,000 
   
  7,000,000      Lockhart, Correctional Fac. Fin. Corp. Rev. Bonds MBIA, 6-5/8s, 4/1/12             AAA                 7,665,000 
   
  4,630,000      Lubbock, Hsg. Fin. Corp. Single-Fam. Mtge. Rev. Bonds Ser. A, GNMA Coll., 
                   zero%, 11/25/17                                                                  AAA                   729,225 
   
  5,500,000      Matagorda Cnty., Navigation Dist. No. 1 Rev. Bonds (Houston Lt. & Pwr.), Ser. 
                   A, AMBAC, 6.7s, 3/1/27                                                           AAA                 6,153,125 
   
  2,000,000      Metro. TX Hlth. Fac. Auth. Rev. Bonds (Wilson Hosp.), 5-3/8s, 1/1/23               AAA                 1,950,000 
   
                 North Central Hlth. Fac. Dev. Corp. Rev. Bonds 
  1,500,000       (Methodist Hosp.-Dallas), Ser. A, BIGI, 9-1/2s, 10/1/15                           AAA                 1,680,000 
   
  4,300,000       (Presbyterian Med. Ctr.), Ser. D, MBIA, 1-3/4s, 12/1/15                           AAA                 4,300,000 
   
  5,000,000      Rio Grande Vy. Hlth. Fac. Dev. Corp. Hosp. Rev. Rfdg. Bonds (Baptist Med. 
                   Ctr.), Ser. B, RIB MBIA, 9.43s, 8/1/12 (acquired 1/20/93, cost 
                   $5,190,000)(d)                                                                   AAA                 5,812,500 
   
  4,500,000      TX Dept. of Hsg. & Cmnty. Affairs Home Mtge. RIBS Ser. A, GNMA Coll., 
                   11.207s, 7/18/23                                                                 AAA                 4,848,750 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       54,741,438 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Vermont (0.6%) 
$ 3,000,000      VT Edl. & Hlth. Bldg. Fin. RIBS FGIC, 9.969s, 9/1/13 (acquired 1/15/93, cost 
                   $3,000,000)(d)                                                                   AAA               $ 3,476,250 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Virginia (4.1%) 
  5,000,000      Fairfax Cnty., Redev. & Hsg. Auth. Multi.-Fam. Hsg. Rev. Bonds, Ser. A, FHA 
                   Insd., 7s, 5/1/26                                                                AAA                 5,500,000 
   
 10,000,000      Fredericksburg, Indl. Dev. Auth. Hosp. Facs. RIBS FGIC, 10.474s, 8/15/23           AAA                12,087,500 
   
  3,000,000      Roanoke Cnty., Wtr. Sys. Rev. Bonds FGIC, 6-1/2s, 7/1/21                           AAA                 3,468,750 
   
  4,000,000      Roanoke, Indl. Dev. Auth. Hosp. RIBS (Roanoke Memorial Hosp.), Ser. B, MBIA, 
                   8.38s, 7/1/20 (acquired 8/24/92, cost $4,000,000)(d)                             AAA                 4,440,000 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       25,496,250 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Washington (2.6%) 
  4,000,000      WA Hlth. Care Facs. Auth. Rev. Bonds (Swedish Hosp. Med Ctr.-Seattle), AMBAC, 
                   6.3s, 11/15/12                                                                   AAA                 4,330,000 
   
                 WA State Pub. Pwr. Supply Syst. Rev. Bonds 
  3,400,000       (Nuclear Project No. 2), Ser. C, FGIC, 7-3/8s, 7/1/11                             AAA                 4,080,000 
   
  6,000,000       (Nuclear Project No. 3), Ser. B, MBIA, 7-1/8s, 7/1/16                             AAA                 7,395,000 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                       15,805,000 

<PAGE>

   
- -------------------------------------------------------------------------------------------------------------------------------- 
Principal Amount                                                                                     Rating (b)            Value 
- -------------------------------------------------------------------------------------------------------------------------------- 
West Virginia (0.1%) 
$  525,000       WV Hsg. Dev. Auth. Home Ownership Mtge. Rev. Bonds Ser. A., FGIC, 9.1s, 
                   1/1/14                                                                           AAA              $    542,710 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Wisconsin (1.4%) 
 2,000,000       Superior, Ltd. Oblig. Rev. Rfdg. Bonds (Midwest Energy Resources), Ser. E, 
                   FGIC, 6.9s, 8/1/21                                                               AAA                 2,497,500 
   
 5,000,000       WI Hlth. Fac. Auth. Rev. Bonds (Meriter Hosp. Inc.), FGIC, 8-3/8s, 
                   12/1/09                                                                          AAA                 5,912,500 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                                                                                                                        8,410,000 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
Wyoming (0.8%) 
 5,000,000       Laramie Cnty., Indl. Dev. Rev. Bonds (Lt. & Fuel & Pwr. Co.) Ser. A, AMBAC, 
                   7-1/4s, 9/1/21                                                                   AAA                 5,462,500 
   
- -------------------------------------------------------------------------------------------------------------------------------- 
                 Total Investments (cost $549,082,674)(e)                                                            $610,868,936 
   
 -------------------------------------------------------------------------------------------------------------------------------- 

<FN>
(a) Percentages indicated are based on total net assets of $616,416,102, which correspond to a net asset value 
per class A and class B share of $15.79 and $15.80, respectively. 
(b) The Moody's or Standard & Poor's ratings indicated are believed to be the most recent ratings available at 
January 31, 1994, for the securities listed. Ratings are generally ascribed to securities at the time of 
issuance. While the agencies may from time to time revise such ratings, they undertake no obligation to do so, 
and the ratings do not necessarily represent what the agencies would ascribe to these securities at January 31, 
1994. Securities rated by Putnam are indicated by "/P" and are not publicly rated. 
(c) A portion of this security was pledged to cover margin requirements for futures contracts at January 31, 
1994. The market value of segregated securities with the custodian for transactions on futures contracts is 
$18,220,000.
(d) Restricted as to public resale. At the date of acquisition, these securities were valued at 
cost. There were no outstanding unrestricted securities of the same class as those held. Total market value of 
restricted securities owned at January 31, 1994 was $22,615,000, or 3.7% of net assets. 
(e) The aggregate identified cost on a tax basis is $549,137,517, resulting in gross unrealized appreciation of 
$62,021,225, and $289,806, respectively, or net unrealized appreciation of $61,731,419. 
The rates shown on Variable Rate Demand Notes and Residual Interest Bonds are the current interest rates at 
January 31, 1994, which are subject to change based on the terms of the security. 
</TABLE>

<TABLE>
Futures Contracts Outstanding at January 31, 1994 
<CAPTION>
- --------------------------------------------------------------------- 
                               Aggregate 
                       Total        Face  Expiration      Appreciation 
          Sells       Value        Value        Date    (Depreciation) 
- --------------------------------------------------------------------- 
<S>               <C>         <C>             <C>            <C>
U.S. Treasury 
   Bond Futures 
   (Sell)         $2,617,187  $2,585,691      Mar/94         $ (31,496) 
U.S. Treasury 
   Bond Futures 
   (Sell)          6,401,500   6,310,698      Mar/94            90,802 
U.S. Treasury 
   Bond Futures 
   (Sell)          2,811,750   2,639,977      Mar/94          (171,773) 
- --------------------------------------------------------------------- 
                                                             $(112,467) 
- --------------------------------------------------------------------- 

The Fund had the following industry group concentrations greater than 
10% on January 31, 1994 (as a percentage of net assets): 

Hospitals/Health Care   17.6% 
Housing                 17.2 
Utilities               15.8 
Water & Sewer           10.4 

The Fund had the following insurance concentrations greater than 10% on 
January 31, 1994, as a percentage of net assets: 

FGIC         26.5% 
MBIA         24.8 
AMBAC        21.0 


<PAGE>

Statement of 
assets and liabilities 
January 31, 1994 (Unaudited) 


</TABLE>
<TABLE>
<S>                    <S>                                                                         <C>             <C>
                       -------------------------------------------------------------------------------------------------------- 
Assets                 Investments in securities, at value (identified cost $549,082,674) (Note 1)                 $ 610,868,936 
                       Cash                                                                                               14,549 
                       Interest receivable                                                                             8,346,035 
                       Receivable for shares of the Fund sold                                                          1,827,605 
                       Receivable for securities sold                                                                  5,890,872 
                       Receivable for variation margin on open futures contracts                                         24,159 
                       -------------------------------------------------------------------------------------------------------- 
                         Total assets                                                                                626,972,156 
Liabilities            Payable for securities purchased                                            $8,140,822 
                       Distributions payable to shareholders                                        1,038,475 
                       Payable for shares of the Fund repurchased                                     433,431 
                       Payable for compensation of Manager (Note 2)                                   297,638 
                       Payable for investor servicing and custodian fees (Note 2)                     133,073 
                       Payable for administrative services (Note 2)                                     1,699 
                       Payable for compensation of Trustees (Note 2)                                      137 
                       Payable for distribution fees (Note 2)                                         433,589 
                       Other accrued expenses                                                          77,190 
                       -------------------------------------------------------------------------------------------------------- 
                         Total liabilities                                                                            10,556,054 
                       -------------------------------------------------------------------------------------------------------- 
                       Net assets                                                                                  $ 616,416,102 
                       -------------------------------------------------------------------------------------------------------- 
Represented by         Paid-in capital (Note 4)                                                                    $557,018,680 
                       Undistributed net investment income                                                              896,257 
                       Accumulated net realized loss on investment and futures transactions                           (3,172,686) 
   
                       Net unrealized appreciation of investments and futures contracts                               61,673,851 
                       -------------------------------------------------------------------------------------------------------- 
                       Total--Representing net assets applicable to capital shares outstanding                     $ 616,416,102 
                       -------------------------------------------------------------------------------------------------------- 
Computation of         Net asset and redemption price of Class A share 
net asset value           ($152,588,166 divided by 9,663,477 shares)                                                      $15.79 
and offering price     Offering price per Class A share (100/95.25 of $15.79)*                                            $16.58 
                       Net asset value and offering price of Class B share 
                          ($463,827,936 divided by 29,353,378 shares)**                                                   $15.80 
                       -------------------------------------------------------------------------------------------------------- 
                       *On single retail sales of less than $25,000. On sales of $25,000 or more and on group 
                       sales the offering price is reduced. 
                       **Redemption price per share is equal to net asset value less any contingent deferred 
                       sales charge. 
</TABLE>

<PAGE>

Statement of 
operations 
Six months ended January 31, 1994 (Unaudited) 

<TABLE>
- ------------------------------------------------------------------------------- 
<S>                                                <C>               <C>
Tax exempt interest income                                           $18,745,131 
Expenses: 
Compensation of Manager (Note 2)                   $1,757,382 
Investor servicing and custodian fees 
  (Note 2)                                            259,010 
Compensation of Trustees (Note 2)                       9,601 
Reports to shareholders                                16,989 
Auditing                                               14,343 
Legal                                                   7,562 
Postage                                                30,247 
Administrative services (Note 2)                        9,187 
Registration fees                                      10,081 
Distribution fees--Class A (Note 2)                   150,638 
Distribution fees--Class B (Note 2)                 2,068,053 
Other                                                  12,399 
- ------------------------------------------------------------------------------- 
  Total expenses                                                       4,345,492 
- ------------------------------------------------------------------------------- 
Net investment income                                                 14,399,639 
- ------------------------------------------------------------------------------- 
Net realized gain on investments 
  (Notes 1 and 3)                                                      2,335,561 
Net realized loss on futures contracts 
  (Notes 1 and 3)                                                       (698,566) 
Net unrealized appreciation of investments 
  and futures during the period                                       13,311,177 
- ------------------------------------------------------------------------------- 
Net gain on investments transactions                                  14,948,172 
- ------------------------------------------------------------------------------- 
Net increase in net assets resulting from 
  operations                                                         $29,347,811 
=============================================================================== 
</TABLE>

<PAGE>


Statement of 
changes in net assets 

<TABLE>
<caption
                                                   Six months 
                                                        ended         Year ended 
                                                   January 31            July 31 
                                                        1994*               1993 
<S>                                              <C>                <C>
Increase in net assets 
Operations: 
Net investment income                            $ 14,399,639       $ 25,121,946 
Net realized gain on investments                    2,335,561          4,446,719 
Net realized loss on futures contracts               (698,566)        (2,317,616) 
Net unrealized appreciation of investments 
  and futures contracts                            13,311,175          9,088,250 
- ------------------------------------------------------------------------------- 
Net increase in net assets resulting from 
  operations                                       29,347,809         36,339,299 
Distributions to shareholders from: 
 Net investment  income--Class A                   (3,006,680)           -- 
 Net investment  income--Class B                  (11,432,488)       (25,410,364) 
 Net realized gain on  investments--Class 
  A                                                  (935,585)           -- 
 Net realized gain on  investments--Class 
  B                                                (2,823,305)        (6,351,965) 
 Increase from capital  share transactions 
  (Note 4)                                         32,607,816        101,946,150 
- ------------------------------------------------------------------------------- 
Total increase in net assets                       43,757,567        106,523,120 
Net assets 
Beginning of year                                 572,658,535        466,135,415 
- ------------------------------------------------------------------------------- 
End of period (including undistributed net 
  investment income/distributions in excess 
  of net investment income of $896,257 and 
  $350,114, respectively)                        $616,416,102       $572,658,535 
 =============================================================================== 
*Unaudited. 
</TABLE>

<PAGE>

Financial 
Highlights* 
(For a share 
outstanding 
throughout the 
period) 

<TABLE>
<CAPTION>
                           For the 
                            period                                                                                  For the 
                         September                                                                                   period 
                          20, 1993                                                                                September 
                             (com-                                                                                  9, 1985 
                            mence-                                                                                    (com- 
                           ment of        Six                                                                        mence- 
                            opera-     months                                                                       ment of 
                         tions) to      ended                                                                        opera- 
                           January    January                                                                     tions) to 
                                31         31                          Year ended July 31                           July 31 
                         ---------   -------------------------------------------------------------------------------------- 
                           1994**     1994**        1993     1992     1991     1990      1989     1988     1987        1986 
                         ---------   -------    -------    -----    -----    -----     -----    -----    -----    --------- 
                           Class A                                           Class B 
- ----------------------------------     ------------------------------------------------------------------------------------ 
<S>                        <C>        <C>       <C>      <C>      <C>       <C>        <C>      <C>       <C>       <C>  
Net Asset Value, 
  Beginning of Period       $15.88     $15.50     $15.42   $14.38   $14.25    $14.79    $13.85   $13.77    $13.91    $12.57 
- --------------------------------------------------------------------------------------------------------------------------- 
Investment operations 
Net Investment Income          .30        .37        .75      .76      .79       .83       .85      .85       .84       .73(a) 
Net Realized and 
  Unrealized Gain 
  (Loss) on 
  Investments                  .02        .40        .28     1.14      .14      (.06)      .93      .11      (.10)     1.41 
- --------------------------------------------------------------------------------------------------------------------------- 
Total from Investment 
  Operations                   .32        .77       1.03     1.90      .93       .77      1.78      .96       .74      2.14 
- --------------------------------------------------------------------------------------------------------------------------- 
Less Distributions 
  from: 
Net Investment Income         (.31)      (.37)      (.75)    (.77)    (.80)     (.83)     (.84)    (.85)     (.84)     (.80) 
Net Realized Gain on 
  Investments                 (.10)      (.10)      (.20)    (.09)      --      (.48)       --     (.03)     (.04)       -- 
- --------------------------------------------------------------------------------------------------------------------------- 
Total Distributions           (.41)      (.47)      (.95)    (.86)    (.80)    (1.31)     (.84)    (.88)     (.88)     (.80) 
- --------------------------------------------------------------------------------------------------------------------------- 
Net Asset Value, End 
  of Period                 $15.79     $15.80     $15.50   $15.42   $14.38    $14.25    $14.79   $13.85    $13.77    $13.91 
- --------------------------------------------------------------------------------------------------------------------------- 
Total Investment 
  Return at Net Asset 
  Value (%) (b)               5.75(c)   10.04(c)    7.00    13.63     6.79      5.49     13.31     7.24      5.31     19.47(c) 
- --------------------------------------------------------------------------------------------------------------------------- 
Net Assets, End of 
  Period 
  (in thousands)          $152,588   $463,828   $572,659 $466,135 $359,465  $309,050  $293,127 $268,004  $264,916  $195,386 
- --------------------------------------------------------------------------------------------------------------------------- 
Ratio of Expenses to 
  Average Net Assets 
  (%)                         1.01(c)    1.55(c)    1.74     1.79     1.68      1.63      1.61     1.58      1.61      1.59(a)(c) 
Ratio of Net 
  Investment Income to 
  Average Net Assets 
  (%)                         5.33(c)    4.68(c)    4.88     5.16     5.60      5.81      6.01     6.20      5.83      6.29(a)(c) 
Portfolio Turnover (%)       19.04(d)   19.04(d)   42.01    66.18    54.69     86.29    201.21   197.29     85.49    125.36(d) 
===========================================================================================================================

* Financial Highlights for periods ended through July 31, 1992 have been 
restated to conform with requirements issued by the SEC in April 1993. 
** Unaudited 
(a) Reflects a waiver of a portion of the distribution plan payments during 
the period. As a result of this waiver, expenses of the Fund at July 31, 1986 
reflect a reduction of $0.01 per share. 
(b) Total Investment Return assumes dividend reinvestment and does not 
reflect the effect of sales charges. 
(c) Annualized. 
(d) Not annualized. 


<PAGE>

Notes to 
financial statements 
January 31, 1994 (Unaudited) 

Note 1 Significant accounting policies 

The Fund is a series of Putnam Tax-Free Income Trust which is registered 
under the Investment Company Act of 1940, as amended, as a diversified, 
open-end management investment company. Putnam Tax-Free Insured Fund seeks 
high current income exempt from federal income tax by investing in tax exempt 
securities that are covered by insurance guaranteeing the timely payment of 
principal and interest, are rated AAA or Aaa, or are backed by the U.S. 
government. 

The Fund offers both Class A and Class B shares. The Fund commenced its 
public offering of Class A shares on September 20, 1993. Class A shares are 
sold with a front-end sales charge of 4.75%. Class B shares do not pay a 
front-end sales charge, but pay a higher ongoing distribution fee than Class 
A shares and are subject to a contingent deferred sales charge if those 
shares are redeemed within six years of purchase. In addition, the Trustees 
declare separate dividends on each class of shares. Each class bears expenses 
unique to that class (including the distribution fees applicable to such 
class), and votes as a class only with respect to its own distribution plan 
or other matters on which a class vote is required by law to be determined by 
the Trustees, all other expenses of the Fund are borne pro-rata by the 
holders of both classes of shares. Shares of each class would receive their 
pro rata share of the net assets of the Fund if the Fund were liquidated. In 
addition, the Trustees declare separate dividends on each class of shares. 

The following is a summary of significant accounting policies consistently 
followed by the Fund in the preparation of its financial statements. The 
policies are in conformity with generally accepted accounting principles. 

A) Security valuation Tax-exempt bonds and notes are stated on the basis of 
valuations provided by a pricing service, approved by the Trustees, which 
uses information with respect to transactions in bonds, quotations from bond 
dealers, market transactions in comparable securities and various 
relationships between securities in determining value. 

B) Security transactions and related investment income Security transactions 
are accounted for on the trade date (date the order to buy or sell is 
executed). Interest income is recorded on the accrual basis. 

C) Option accounting principles When the Fund writes a call or put option, an 
amount equal to the premium received by the Fund is included in the Fund's 
"Statement of Assets and Liabilities" as an asset and an equivalent 
liability. The amount of the liability is subsequently "marked-to-market" to 
reflect the current market value of the option written. The current market 
value of an option is the last sale price or, in the absence of a sale, the 
last offering price. If an option expires on its stipulated expiration date, 
or if the Fund enters into a closing purchase transaction, the Fund realizes 
a gain (or loss if the cost of a closing purchase transaction exceeds the 
premium received when the option was written) without regard to any 
unrealized gain or loss on the underlying security, and the liability related 
to such option is extinguished. If a written call option is exercised, the 
Fund realizes a gain or loss from the sale of the underlying security and the 
proceeds of the sale are increased by the premium originally received. If a 
written put option is exercised, the amount of the premium originally 
received reduces the cost of the security the Fund purchases upon exercise of 
the option. 

The Fund writes covered call options; that is, options for which it holds the 
underlying security or its equivalent. Accordingly, the risk in writing a 
call option is that the Fund relinquishes the opportunity to profit if the 
market price of the underlying security increases and the option is 
exercised. In writing a put option, the Fund assumes the risk of incurring a 
loss if the market price of the underlying security decreases and the option 
is exercised. 

The premium paid by the Fund for the purchase of a call or put option is 
included in the Fund's "Statement of Assets and Liabilities" as an investment 
and subsequently "marked-to-market" to reflect the current market value of 
the option. If an option which the Fund has purchased expires on the 
stipulated expiration date, the Fund realizes a loss in the amount of the 
cost of the option. If the Fund enters into a closing sale transaction, the 
Fund realizes a gain or loss, depending on whether proceeds from the closing 
sale transaction are greater or less than the cost of the option. If the Fund 
exercises a call option, the cost of the securities acquired by exercising 
the call is increased by the premium paid to buy the call. If the Fund 
exercises a put option, it realizes a gain or loss from the sale of the 
underlying security and the proceeds from such sale are decreased by the 
premium originally paid. 

<PAGE>

Futures A futures contract is an agreement between two parties to buy and 
sell a security at a set price on a future date. Upon entering into such a 
contract, the Fund is required to pledge to the broker an amount of cash or 
U.S. government securities equal to the minimum "initial margin" requirements 
of the exchange. Pursuant to the contract, the Fund agrees to receive from or 
pay to the broker an amount of cash equal to the daily fluctuation in value 
of the contract. Such receipts or payments are known as "variation margin," 
and are recorded by the Fund as unrealized gains or losses. When the contract 
is closed, the Fund records a realized gain or loss equal to the difference 
between the value of the contract at the time it was opened and the value at 
the time it was closed. The potential risk to the Fund is that the change in 
value of the underlying securities may not correspond to the change in value 
of the futures contracts. 

Options on futures Options on futures generally operate in the same manner as 
options purchased or written directly on the underlying debt securities. The 
Fund is required to deposit, in a manner similar to futures contracts, 
"initial margin" and "variation margin" with respect to put and call options 
written on futures contracts. In addition, upon exercise, net premiums will 
decrease the unrealized loss or increase the unrealized gain on the future. 

D) Federal taxes It is the policy of each Fund to distribute all of its 
income within the prescribed time and otherwise comply with the provisions of 
the Internal Revenue Code applicable to regulated investment companies. It is 
also the intention of the Fund to distribute an amount sufficient to avoid 
imposition of any excise tax under Section 4982 of the Internal Revenue Code 
of 1986. Therefore, no provision has been made for federal taxes on income, 
capital gains or unrealized appreciation of securities held or excise tax on 
income and capital gains. 

E) Distributions to shareholders Income dividends are recorded daily by the 
Fund and are distributed monthly. Capital gain distributions are recorded on 
the ex-dividend date and paid annually, or as necessary to meet the 
distribution requirements described above. 

F) Amortization of bond premium and discount Any premium resulting from the 
purchase of securities is amortized using the effective yield method for 
bonds issued after September 27, 1985, and on a straight-line basis for bonds 
issued prior thereto. The premium in excess of the call price, if any, is 
amortized to the call date; thereafter, the remaining excess premium is 
amortized to maturity. Discount on zero-coupon bonds is amortized according 
to the effective yield method. 

G) Expenses of the Trust Expenses directly charged or attributable to the 
Fund will be paid from the assets of the Fund. Generally, expenses of the 
Trust will be allocated between and charged to the assets of each Fund on a 
basis that the Trustees deem fair and equitable, which may be based on the 
relative assets of each Fund or the nature of the services performed and 
relative applicability to each Fund. 

Note 2 Management fee, administrative services, and other transactions 

Compensation of Putnam Investment Management the Fund's Manager, a 
wholly-owned subsidiary of Putnam Investments, Inc., for management and 
investment advisory services is paid quarterly based on the average net 
assets of the Fund for the quarter. Such fee is based on 0.6% of the first 
$500 million of average net assets; 0.5% of the next $500 million; 0.45% of 
the next $500 million and 0.4% of any amount over $1.5 billion. Such fees are 
subject to reduction under current law in any year to the extent that 
expenses (exclusive of distribution fees, brokerage, interest and taxes) of 
the Fund exceed 2.5% of the first $30 million of average net assets, 2.0% of 
the next $70 million and 1.5% of any excess over $100 million and by the 
amount of certain brokerage commissions and fees (less expenses) received by 
affiliates of the Manager on the Fund's portfolio transactions. 

The Fund also reimburses the Manager for the compensation and related 
expenses of certain officers of the Fund and their staff who provide 
administrative services to the Fund. The aggregate amount of all such 
reimbursements is determined annually by the Trustees. For the six months 
ended January 31, 1994, the Fund paid $9,187 for these services. 

Trustees of the Fund receive an annual Trustee's fee of $1,270, and an 
additional fee for each Trustees' meeting attended. Trustees who are not 
interested persons of the Manager and who serve on committees of the Trustees 
receive additional fees for attendance at certain committee meetings. 

Custodial functions are being provided to the Fund by Putnam Fiduciary Trust 
Company (PFTC), a subsidiary of Putnam Invest-

<PAGE>

ments, Inc. Investor servicing agent functions are provided by Putnam 
Investor Services, a division of PFTC. Fees paid for these investor servicing 
and custodian fees functions for the six months ended January 31, 1994 
amounted to $259,010. Investor servicing and custodian fees reported in the 
Statement of operations for the six months ended January 31, 1994 have been 
reduced by credits allowed by PFTC. 

The Fund has adopted a distribution plan with respect to its Class A shares 
(the "Class A Plan") pursuant to Rule 12b-1 under the Investment Company Act 
of 1940. The purpose of Class A Plan is to compensate Putnam Mutual Funds 
Corp. (formerly known as Putnam Financial Services, Inc.), a wholly-owned 
subsidiary of Putnam Investments, Inc., for services provided and expenses 
incurred by it in distributing Class A shares. The Trustees have approved 
payment by the Fund to Putnam Mutual Funds Corp. at an annual rate of up to 
0.20% of the Fund's average net assets attributable to Class A shares. For 
the six months ended January 31, 1994, the Fund paid Putnam Mutual Funds 
Corp. distribution fees of $150,638, for Class A shares. 

The Fund has adopted a separate distribution plan with respect to its Class B 
shares (the "Class B Plan") pursuant to Rule 12b-1 under the Investment 
Company Act of 1940. The purpose of the Class B Plan is to compensate Putnam 
Mutual Funds Corp. for services provided and expenses incurred by it in 
distributing Class B shares. The Class B Plan provides for payments by the 
Fund to Putnam Mutual Funds Corp. at an annual rate of up to 0.85% of the 
funds average net assets attributable to Class B shares. For the six months 
ended January 31, 1994, the Fund paid Putnam Mutual Funds Corp. distribution 
fees of $2,068,052 for Class B shares. 

During the six months ended January 31, 1994, Putnam Mutual Funds Corp., a 
whollyowned subsidiary of Putnam Investments, Inc., acting as an underwriter, 
received net commissions of $21,860 from the sale of Class A shares of the 
Fund. 

Putnam Mutual Funds Corp. also receives the proceeds of contingent deferred 
sales charges levied on Class B share redemptions within four years of 
purchase. The charge is based on declining rates, which begin at 5.0% of the 
net asset value of the redeemed shares . Putnam Mutual Funds Corp. received 
contingent deferred sales charges of $370,307 from such redemptions for the 
six months ended January 31, 1994. 

A deferred sales charge of up to 1% is assessed on certain redemptions of 
Class A shares purchased as part of an investment of $1 million or more. For 
the six months ended January 31, 1994, Putnam Mutual Funds Corp., acting as 
underwriter, received no monies on Class A redemptions. 

Note 3 Purchases and sales of securities 

During the six months ended January 31, 1994, purchases and sales of 
investment securities other than short-term municipal obligations aggregated 
$134,075,069 and $110,688,155, respectively. Purchases and sales of 
short-term municipal obligations aggregated $29,360,000 and $19,060,000 
respectively. In determining the net gain or loss on securities sold, the 
cost of securities has been determined on the identified cost basis. 

                                                        Sales of futures 
                                                               contracts 
                                                ------------------------ 
                                                  Number 
                                                      of       Aggregate 
                                               Contracts      Face Value 
- ------------------------------------------------------------------------ 
Contracts open at 
  beginning of period                                210   $  23,732,146 
Contracts opened                                     864      97,659,273 
Contracts closed                                    (969)   (109,855,053) 
- ------------------------------------------------------------------------ 
Open at end of period                                105   $  11,536,366 
- ------------------------------------------------------------------------ 

<PAGE>

Note 4 Capital shares 

At January 31, 1994, there was an unlimited number of shares of beneficial 
interest authorized. Transactions in capital shares were as follows: 


</TABLE>
<TABLE>
<CAPTION>
                                                                                 September 20, 1993 
                                                                                      (commencement 
                                                                                  of operations) to 
                                                                                         January 31 
                                                                          ------------------------- 
                                                                                               1994 
                                                                          ------------------------- 
Class A                                                                    Shares           Amount 
- -------------------------------------------------------------------------------------------------- 
<S>                                                                     <C>            <C> 
Shares sold                                                             10,043,357     $160,080,844 
Shares issued in connection with reinvestment 
  of distributions                                                         188,642        2,289,738 
- -------------------------------------------------------------------------------------------------- 
                                                                        10,231,999      162,370,582 
Shares repurchased                                                        (568,522)      (8,961,785) 
- -------------------------------------------------------------------------------------------------- 
Net increase                                                             9,663,477     $153,408,797 
- -------------------------------------------------------------------------------------------------- 
</TABLE>

<TABLE>
<CAPTION>
                                                     Six months ended                    Year ended 
                                                           January 31                       July 31 
                                           --------------------------   -------------------------- 
                                                                 1994                          1993 
                                           --------------------------   -------------------------- 
Class B                                       Shares          Amount       Shares           Amount 
- -------------------------------------------------------------------------------------------------- 
<S>                                        <C>          <C>             <C>            <C>
Shares sold                                 3,053,466   $  48,041,084    8,533,119     $129,627,042 
Shares issued in connection with 
  reinvestment of distributions               596,710       9,380,958    1,319,439       19,989,290 
- -------------------------------------------------------------------------------------------------- 
                                            3,650,176      57,422,042    9,852,558      149,616,332 
Shares repurchased                        (11,240,285)   (178,223,023)  (3,133,007)     (47,670,182) 
- -------------------------------------------------------------------------------------------------- 
Net increase (decrease)                    (7,590,109)  ($ 120,800,981)  6,719,551     $101,946,150 
- -------------------------------------------------------------------------------------------------- 
</TABLE>

Note 5 Reclassification of Capital Accounts 

Effective August 1, 1993, Putnam Tax-Free Income Trust--Putnam Tax-Free 
Insured Fund has adopted the provisions of Statement of Position 93-2 
"Determination, Disclosure and Financial Statement Presentation of Income, 
Capital Gain and Return of Capital Distributions by Investment Companies 
(SOP)." The purpose of this SOP is to report the accumulated net investment 
income (loss) and accumulated net realized gain (loss) accounts in such a 
manner as to approximate amounts available for future distributions (or to 
offset future realized capital gains) and to achieve uniformity in the 
presentation of distributions by investment companies. 

As a result of the SOP, the Fund has reclassified $1,285,900 reducing 
distributions in excess of net investment income, $1,031,356 reducing 
accumulated net realized loss and $2,317,256 decreasing additional paid-in 
capital. 

These adjustments represent the cumulative amounts necessary to report these 
balances through July 31, 1993, the close of the Fund most recent fiscal 
year-end, for financial reporting and tax purposes. 

<PAGE>

Fund 
Performance 
Supplement 

Putnam Tax-Free Insured Fund is one of two separate portfolios composing 
Putnam Tax-Free Income Trust, a series investment company. Each portfolio 
seeks high current income exempt from federal income tax, consistent with its 
particular investment policies. Putnam Tax-Free Insured Fund invests in 
tax-exempt securities covered by insurance guaranteeing the timely payment of 
principal and interest, but not market value, uninsured securities rated AAA 
or Aaa, or securities backed by the U.S. government. 

The Lehman Brothers Municipal Bond Index is an unmanaged list of 
approximately 8,000 investment-grade, fixed rate, long-term maturity 
tax-exempt bonds, which are selected to be representative of the market in 
terms of price movement and sector distribution. The average quality of bonds 
held in the index may differ from the average quality of those bonds in which 
the fund invests. The index does not include bonds in certain of the lower 
rating classifications in which the fund may invest. The index does not take 
into account brokerage commissions or other costs and may pose different 
risks from the fund. Total return performance for the index reflects 
mathematically derived changes of market price and reinvestment of interest 
payments, as computed by Lehman Brothers. The fund portfolio contains 
securities that do not match those in the index. 

The Consumer Price Index is a commonly used measure of inflation; it does not 
represent an investment return. 

The fund performance supplement has been prepared by Putnam Management to 
provide additional information about the fund and the indexes used for 
performance comparisons. The information is not part of the portfolio of 
investments owned or the financial statements. 

Total return at end of most recent calendar quarter 
Periods ended December 31, 1993 

                            Class B 
                         Cumulative           Annualized 
                      NAV     CDSC       NAV       CDSC 
- ------------------------------------------------------- 
1 year               11.20%    6.20%    11.20%      6.20% 
5 years              52.95    50.95      8.87       8.58 
Life-of-fund+ 
  (since 9/9/85)    113.67   113.67      9.57       9.57 
- ------------------------------------------------------- 
Please see page 2 for more information about fund performance and a 
description of investment terms. 

<PAGE>

Putnam 
Tax-Free 
Insured 
Fund 

Fund information 

Investment manager 
Putnam Investment 
Management, Inc. 
One Post Office Square 
Boston, MA 02109 

Marketing services 
Putnam Mutual Funds Corp. 
One Post Office Square 
Boston, MA 02109 

Investor servicing agent 
Putnam Investor Services 
Mailing address: 
P.O. Box 41203 
Providence, RI 02940-1203 
1-800-225-1581 

Custodian 
Putnam Fiduciary 
Trust Company 

Legal Counsel 
Ropes & Gray 

(DALBAR LOGO) 

Putnam Investor Services 
has received the DALBAR 
award each year since 
the award's 1990 inception. 
In more than 10,000 tests 
of 38 shareholder 
service components, 
Putnam outperformed 
the industry standard 
in every category. 

80/11-11192 

<PAGE>

Officers 
George Putnam 
President 

Charles E. Porter 
Executive Vice President 

Patricia C. Flaherty 
Senior Vice President 

Lawrence J. Lasser 
Vice President 

Gordon H. Silver 
Vice President 

James P. Erickson 
Vice President 

Richard P. Wyke 
Vice President 
and Fund Manager 

William N. Shiebler 
Vice President 

John R. Verani 
Vice President 

Paul O'Neil 
Vice President 

John D. Hughes 
Vice President 
and Treasurer 

Beverly Marcus 
Clerk and 
Assistant Treasurer 

Trustees 
George Putnam, Chairman, 
William F. Pounds, Vice Chairman, 
Jameson Adkins Baxter, Hans H. Estin, 
John A. Hill, Elizabeth T. Kennan, Lawrence J. Lasser, Robert E. Patterson, 
Donald S. Perkins, George Putnam, III, 
A.J.C. Smith, W. Nicholas Thorndike 
Associate Trustee: Alla O'Brien 

This report is for the information of shareholders of Putnam Tax-Free Insured 
Fund. It may also be used as sales literature when preceded or accompanied by 
the current prospectus, which gives details of sales charges, investment 
objectives, and operating policies of the fund. 


PUTNAM INVESTMENTS
The Putnam Funds
One Post Office Square
Boston, Massachusetts 02109

Bulk Rate
U.S. Postage
Paid
Boston, MA
Permit No. 53749


<PAGE>


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(3)  Certain tabular and columnar headings and symbols are displayed 
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(4)  Bullet points and similar graphic signals are omitted.

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(6)  Dagger footnote symbol replaced with plus sign (+).

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