Form 485BXT PUTNAM FUNDS TRUST

NOTE: This Post-Effective Amendment No. 291 is being filed pursuant to Rule 485(b) under the Securities Act of 1933, as amended (the “Securities Act”), solely to designate September 20, 2018 as the new effective date for Post-Effective Amendment No. 288 filed pursuant to Rule 485(a) under the Securities Act on June 29, 2018. Post-Effective Amendment No. 288 was initially scheduled to become effective on August 28, 2018. This Post-Effective Amendment No. 291 is not intended to amend or supersede any information contained in Post-Effective Amendment No.288.

This Post-Effective Amendment relates solely to the Registrant's Putnam Short Duration Income Fund series. Information contained in the Registrant's Registration Statement relating to any other series of the Registrant is neither amended nor superseded hereby.

Putnam Funds Trust

Putnam Short Duration Income Fund

Part A. INFORMATION REQUIRED IN A PROSPECTUS

Part A is incorporated by reference to Part A of Post-Effective Amendment No. 288 to the Registration Statement on Form N-1A of Putnam Funds Trust (the “Registrant”) under the Securities Act of 1933, as amended, and Amendment No. 289 to the Registrant’s Registration Statement on Form N-1A under the Investment Company Act of 1940, as amended, filed with the Securities and Exchange Commission on June 29, 2018 (“Amendment No. 288/289”).

Part B. INFORMATION REQUIRED IN A STATEMENT OF ADDITIONAL INFORMATION

Part B is incorporated by reference to Part B of Amendment No. 288/289.

Part C. OTHER INFORMATION

Part C is incorporated by reference to Part C of Amendment No. 288/289.

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement under Rule 485(b) under the Securities Act of 1933, as amended, and has duly caused this Amendment to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Boston, and The Commonwealth of Massachusetts, on the 27th day of August, 2018.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Amendment to the Registration Statement has been signed below by the following persons in the capacities and on the date indicated: