Section 906 Certifications

I, Jonathan S. Horwitz, the Principal Executive Officer of the Funds listed on Attachment A, certify that, to my knowledge:

1. The form N-CSR of the Funds listed on Attachment A for the period ended March 31, 2018 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Form N-CSR of the Funds listed on Attachment A for the period ended March 31, 2018 fairly presents, in all material respects, the financial condition and results of operations of the Funds listed on Attachment A.

Date: May 29, 2018

/s/ Jonathan S. Horwitz

______________________

Jonathan S. Horwitz

Principal Executive Officer

Section 906 Certifications

I, Janet C. Smith, the Principal Financial Officer of the Funds listed on Attachment A, certify that, to my knowledge:

1. The form N-CSR of the Funds listed on Attachment A for the period ended March 31, 2018 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Form N-CSR of the Funds listed on Attachment A for the period ended March 31, 2018 fairly presents, in all material respects, the financial condition and results of operations of the Funds listed on Attachment A.

Date: May 29, 2018

/s/ Janet C. Smith

______________________

Janet C. Smith

Principal Financial Officer

Attachment A

Period (s) ended March 31, 2018

               Putnam Master Intermediate Income Trust

               Putnam California Tax Exempt Income Fund

               Putnam American Government Income Fund

               Putnam Tax Exempt Income Fund

               Putnam International Growth Fund

               Putnam Mortgage Securities Fund

               Putnam Money Market Fund

               Putnam Government Money Market Fund

               Putnam Diversified Income Trust

               Putnam Dynamic Asset Allocation Balanced Fund

               Putnam Dynamic Asset Allocation Growth Fund

               Putnam Dynamic Asset Allocation Conservative Fund