Isabella Bank (ISBA) 10-Q 2017 Q3 Quarterly report

Exhibit 32

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Isabella Bank Corporation (the “Corporation”) on Form 10-Q for the quarterly period ended September 30, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Jae A. Evans, President and Chief Executive Officer and Rhonda S. Tudor, Interim Chief Financial Officer of the Corporation, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report 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 Report fairly presents, in all material respects, the financial condition and results of operations of the Corporation.

/s/ Jae A. Evans

President, Chief Executive Officer

(Principal Executive Officer)

November 3, 2017

/s/ Rhonda S. Tudor

Interim Chief Financial Officer

(Principal Accounting Officer)

November 3, 2017