State estimated tax — 2026

Michigan Estimated Tax Payments 2026

Who has to make Michigan quarterly estimated payments, the 2026 due-date calendar, the safe-harbor rules that avoid an underpayment penalty, and how to pay through Michigan Treasury eServices.

Who must pay

Michigan’s trigger for MI-1040ES payments is a projected 2026 Michigan tax bill of $500 or more once withholding and credits are subtracted out.

2026 due-date calendar

Installment	% of annual estimate	Due date	Note
Q1	25%	April 15, 2026	—
Q2	25%	June 15, 2026	—
Q3	25%	September 15, 2026	—
Q4	25%	January 15, 2027	—

Michigan divides the annual required payment by four (or by however many vouchers remain if you start filing later in the year) for equal 25% installments — no unequal schedule like California.

Safe harbor — avoiding the underpayment penalty

Michigan sets the baseline required payment at 90% of 2026 tax (dropping to 66⅔% for farmers, fishermen, and seafarers), or lets you anchor instead to 100% of last year’s bill. Once 2025 Michigan AGI clears $150,000 ($75,000 married filing separately), that anchor option rises to 110% — a high-income step-up several states on this list apply, each at its own threshold and percentage.

How to calculate your payment

Estimate your annual Michigan tax, test it against the safe harbor above, then split the required annual payment across the installments in the calendar. The site's quarterly planner handles the math and the federal side together.

Open the quarterly estimated tax calculator → Check your underpayment penalty exposure →

How to pay

Pay online through Michigan Treasury eServices, or mail a check or money order with the Form MI-1040ES voucher.

Penalty basics

Michigan charges a 25% penalty (minimum $25) for failing to file estimated payments at all, or a 10% penalty (minimum $10) for underpaying or paying late, plus interest on the shortfall at 1 percentage point above the adjusted prime rate, reset every January 1 and July 1. The published rate for January 1 – June 30, 2026 is 8.48% annualized.

Michigan-specific notes

Michigan’s statutory 4.25% flat rate is subject to a "trigger" mechanism that can lower it when General Fund revenue growth outpaces inflation — Treasury confirmed the trigger was NOT activated for 2026, so the rate stays at 4.25%.
23 Michigan cities (Grand Rapids, Lansing, Saginaw, and others) administer their own local income tax entirely separately from the state MI-1040ES — their own forms, filing, and estimated-payment schedules apply. Detroit is a partial exception: Treasury processes Detroit city returns, but Detroit still runs a distinct estimated-payments track from the state MI-1040ES.
The 66⅔% current-year safe-harbor percentage is reserved for farmers, fishermen, and seafarers — everyone else uses the 90% test.

See the Michigan 2026 tax brackets for current rates, or the Michigan state tax calculator to estimate your full-year liability.

Frequently asked questions

When are Michigan estimated tax payments due in 2026?

The four Michigan due dates for 2026 are April 15, 2026, June 15, 2026, September 15, 2026, January 15, 2027. Michigan divides the annual required payment by four (or by however many vouchers remain if you start filing later in the year) for equal 25% installments — no unequal schedule like California.

Does Michigan’s flat tax rate ever change during the year?

It can. Michigan's income tax rate is set at 4.25% by statute, but a "trigger" provision can lower it for a tax year if General Fund revenue growth outpaces inflation. Treasury reviews this every spring — for 2026, Treasury confirmed the trigger was not activated, so the rate holds at 4.25%.

Do Michigan city income taxes need their own estimated payments?

Yes, for most cities. 23 Michigan cities with a local income tax — including Grand Rapids, Lansing, and Saginaw — run their own estimated-payment systems, entirely separate from the state MI-1040ES. Detroit is a partial exception: Treasury processes Detroit’s city income tax returns, but Detroit still has its own distinct quarterly estimated-payment track, not the state form.

What if I only underpay Michigan estimated tax — is there a separate penalty from the interest charge?

Yes, they’re two different charges. Michigan can add a 10% penalty (minimum $10) for underpaying or paying late, or a steeper 25% penalty (minimum $25) if you skip estimated payments entirely, on top of interest on the unpaid balance at 1 percentage point above the adjusted prime rate.

How do I pay Michigan estimated tax?

Pay online through Michigan Treasury eServices, or mail a check with the Form MI-1040ES voucher.

Estimated tax in other states

Compare how Michigan stacks up against the other states with a Rising search trend for estimated-tax rules.