January 28, 1994 Securities and Exchange Commission 450 Fifth Street, N.W. Washington, DC 20549 RE: Putnam Managed Income Trust (Reg. No. 2-96309) (811-4242) (the "Fund") Post-Effective Amendment No. 10 to Registration Statement on Form N-1A Ladies and Gentlemen: We are filing today through the EDGAR system Post-Effective Amendment No. 10 to the Fund's Registration Statement on Form N- 1A. The Amendment has been electronically coded to show changes from the Prospectus dated March 1, 1993, as revised August 1, 1993, filed with the Commission on August 4, 1993 and the Statement of Additional Information dated March 1, 1993, filed with the Commission on March 5, 1993. The Amendment includes updated financial statements and uses standardized Putnam disclosure, as appropriate. The Amendment also registers additional shares of the Fund pursuant to Rule 24e-2, and the filing fee of $100 has been wire transferred to the Commission's lockbox at Mellon Bank, SEC Filing Fee Account Number 0000764110. The Amendment is filed pursuant to Rule 485(b) to become effective automatically on February 1, 1994. Pursuant to Rule 485(e) under the Act, I represent that the Amendment does not contain any disclosures which would render it ineligible to become effective under Rule 485(b). Comments or questions concerning the Amendment may be directed to me at 1-800-225-2465, Ext. 1105. Very truly yours, Karen R. Kay Senior Vice President and Assistant General Counsel Putnam Investments, Inc. cc: Bryan Chegwidden, Esq.