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Bulletin 5 of 2026

Bulletin 5 of 2026

MTT Interest Rates

May 11, 2026
Subject: Interest Rates on Michigan Tax Tribunal Judgments

Public Act 220 of 2012 provides that, after June 30, 2012, the Tax Tribunal interest rate shall be calculated twice a year for the periods of January 1 to June 30 and July 1 to December 31. The interest rate is established as the “adjusted prime rate” plus 1%. The “adjusted prime rate” is the average predominant prime rate quoted by not fewer than 3 commercial banks to large businesses during a preceding six-month period, as determined by the Department of Treasury.

Prior to July 1, 2012, the average interest rate was calculated annually utilizing the average auction rate of 91-day discount Treasury bills in the prior State fiscal year. Announced interest rates through June 30, 2012, may be found in Bulletin 14 of 2012.

 

Period

Interest Rate

July 1 – December 31, 2012

4.25%

January 1 – June 30, 2013

4.25%

July 1 – December 31, 2013

4.25%

January 1 – June 30, 2014

4.25%

July 1 – December 31, 2014

4.25%

January 1 – June 30, 2015

4.25%

July 1 – December 31, 2015

4.25%

January 1 – June 30, 2016

4.25%

July 1 – December 31, 2016

4.40%

January 1 – June 30, 2017

4.50%

July 1 – December 31, 2017

4.70%

January 1 – June 30, 2018

5.15%

July 1 – December 31, 2018

5.41%

January 1 – June 30, 2019

5.90%

July 1 – December 31, 2019

6.39%

January 1 – June 30, 2020

6.40%

July 1 – December 31, 2020

5.63%

January 1 – June 30, 2021

4.25%

July 1 – December 31, 2021

4.25%

January 1 – June 30, 2022

4.25%

July 1 – December 31, 2022

4.27%

January 1 – June 30, 2023

5.65%

July 1 – December 31, 2023

8.25%

January 1 – June 30, 2024

9.30%

July 1 – December 31, 2024

9.50%

January 1 – June 30, 2025

9.47%

July 1 – December 31, 2025

8.66%

January 1 – June 30, 2026

8.48%

July 1 – December 31, 2026

7.85%