Michigan Summer vs Winter Property Tax Bills: Why You Get Two Bills and What’s in Each

Most states bill property tax once a year. Michigan bills it twice. Every Michigan homeowner gets a “summer” bill in July and a “winter” bill in December. Together, the two bills add up to the year’s total property tax. But what is actually in each bill — and why split them at all?

This guide explains why Michigan splits property taxes into two bills, what each bill funds, when each is due, what happens if you pay late, and how mortgage escrow accounts handle the timing. Understanding this is helpful when you are budgeting, when you are about to close on a home, and when you are deciding how to pay.

Why Michigan Splits Property Taxes Into Two Bills

Michigan’s two-bill system is mostly a historical artifact, formalized into modern statute. Different layers of Michigan government collect property tax on different schedules, and the legislature codified the split this way:

Summer tax historically funded the state and the schools, both of which run on a fiscal year that starts in July.
Winter tax historically funded the local government (city, township, county) and special assessments, which run on calendar-year budgets.

The result is a system where you pay schools and the state in summer, and you pay local government in winter. The split is not optional. Even if you wanted to pay everything in July or everything in December, the system bills it the way the law requires.

What’s in the Michigan Summer Tax Bill

Your summer tax bill, mailed in early July, typically funds:

School operating millage: the largest component for non-homestead properties, often 18 mills. Principal residences are exempt from this 18 mills if you have filed a Principal Residence Exemption — see our PRE guide
School debt millage: bond payments for school construction. Set by local school board referendums.
State Education Tax (SET): 6 mills, charged statewide on all property regardless of homestead status.
Intermediate School District (ISD) millage: regional school services.
Community college millage: in counties with community colleges (most of Michigan).
Some county and library millages in certain jurisdictions that bill in summer.

The exact mix depends on your local jurisdiction. The total summer millage is typically 60-75% of your annual property tax. For a homestead property in many Michigan suburbs, summer might be roughly 25-30 mills (excluding the 18-mill PRE exemption), while non-homestead summer can run 45-55 mills.

What’s in the Michigan Winter Tax Bill

Your winter tax bill, mailed in early December, typically funds:

City or township operating millage: general government services like police, fire, road maintenance, administration.
County operating millage: county-level services (sheriff, courts, jail, county roads, parks).
Public safety millages: often separate millages for fire department, EMS, or expanded police.
Library millage: if your area has a public library funded by millage.
Parks and recreation millages.
Special assessment districts: downtown development authorities, neighborhood improvement districts, sewer or sidewalk assessments.
Drainage assessments: in areas with established drain districts.

The total winter millage typically equals 25-40% of your annual tax. For a typical Michigan suburb, this might be 12-20 mills.

Key Dates: When Are the Bills Due?

Summer tax bill mailed: Early July (specific date varies by jurisdiction)
Summer tax due: September 14 in most Michigan jurisdictions
Winter tax bill mailed: Early December
Winter tax due: February 14 in most Michigan jurisdictions
Penalty for late summer payment: Typically 1% per month accrued
Penalty for late winter payment: Typically 1% per month, plus the entire balance becomes “delinquent” on March 1
March 1: Any unpaid taxes from the prior year roll over to the County Treasurer as delinquent. This is the start of the foreclosure clock — see our guide to Michigan property tax foreclosure.

Some jurisdictions allow earlier or split payment options. Detroit, for example, lets homeowners split summer tax into two installments. Always check the bill itself for your specific due dates and options.

How Mortgage Escrow Handles Two Bills

If you have a mortgage, your lender almost certainly collects 1/12th of your annual property tax in your monthly payment and holds it in escrow. When the tax bills come due, the lender pays them out of escrow.

The escrow process is invisible to most homeowners — you do not see the bills, do not write a check. But there are scenarios where the timing matters:

When You Buy a Home Mid-Year

If you close in October, the seller typically pays the summer tax (already due in September) and the title company prorates the winter tax between you and the seller. Your lender then needs to pay the winter bill out of an escrow account that has only been collecting for a couple months. They handle the math at closing through “prepaid escrow” — extra cash you put up to fund the account.

When You Refinance

Refinancing in summer (before the September 14 due date) means the new lender takes over escrow before the summer bill is paid. Refinancing in winter is similar with the December bill. Either way, expect the closing statement to include “tax escrow” amounts that may surprise you. These are not extra costs — they fund the new escrow account.

When Taxes Increase Mid-Year

If you bought a home and uncapping causes the next tax bill to jump (see our guide to Michigan uncapping), the lender’s escrow estimate will fall short. You’ll get a notice that your monthly payment is going up to cover the new tax amount, plus a temporary increase to refill the depleted escrow.

Paying Property Tax Without an Escrow Account

Homeowners who own free and clear (no mortgage), or who specifically opted out of escrow, pay property tax directly. Two strategies make this easier:

Set aside the monthly equivalent. Take your annual tax total, divide by 12, and transfer that amount to a separate savings account each month. When the summer and winter bills arrive, the money is there.
Use the local treasurer’s online portal. Most Michigan cities and townships now offer online tax payment, often with autopay. Set autopay for the summer and winter due dates and forget about it.

For homeowners who tend to forget bills, autopay through the local treasurer is highly recommended. A missed Michigan tax payment quickly compounds into delinquency, then forfeiture, then foreclosure.

Special Assessments: The Sometimes-Hidden Component

Both summer and winter tax bills can include special assessments. These are charges for specific improvements that benefit your property — sidewalks, sewer hookups, road paving, drain reconstruction. Special assessments are billed separately from millage and may show up as a flat dollar amount instead of a millage rate.

Common special assessments in Michigan:

Drain assessments: Common in areas served by county drain commissions. Charged annually for drain maintenance and improvements.
Downtown Development Authority (DDA) assessments: In certain commercial districts.
Neighborhood improvement assessments: Sidewalks, streetlights, paving.
Sewer or water connection assessments: When a previously septic neighborhood is connected to municipal sewer.

Special assessments often have specific payoff schedules — a few thousand dollars spread over 10 or 15 years. They cannot be appealed at the Board of Review (those are millage and SEV disputes). They can sometimes be paid off early to remove from future tax bills.

Reading Your Michigan Tax Bill

Every Michigan tax bill has a similar layout. Key fields to find:

Parcel number: your property’s unique identifier in the local assessor’s records
SEV (State Equalized Value): roughly half your home’s market value
Taxable Value: what taxes are calculated against (capped at the lesser of CPI or 5% increase per year)
Homestead percentage (PRE %): 100% if your PRE is fully active, lower if a partial exemption applies
Millage breakdown: a list of every millage being charged, with the rate and the dollar amount
Total tax due
Payment due date

If anything looks wrong — incorrect square footage, missing PRE, wrong owner name — call the local assessor right away. Errors get fixed for the next bill cycle. If your SEV looks too high, that’s a separate issue to address at the March Board of Review.

Frequently Asked Questions

Can I pay all my Michigan property tax in summer to be done with it? No. The winter bill cannot be prepaid before it is generated in December. Once the winter bill exists, you can pay it before the February 14 due date.

What happens if I pay summer tax late? Penalties of 1% per month accrue from September 15. The bill remains payable to the local treasurer through February. After March 1 of the following year, it rolls over to the County Treasurer as delinquent and additional fees apply.

Can I pay Michigan property tax with a credit card? Most local treasurers accept credit cards online with a convenience fee (typically 2.5-3%). For most homeowners, the fee outweighs any rewards, so direct bank payment is better.

What if I sell mid-year? Who pays the next tax bill? The title company prorates property taxes at closing. The seller pays for the days they owned the home; the buyer pays for the days going forward. Whoever holds title when the bill is issued is technically responsible to the treasurer, but the proration ensures everyone pays their fair share.

Are Michigan property taxes deductible on federal income tax? Yes, but the federal deduction is capped at $10,000 total for all state and local taxes (SALT cap from 2017). Many Michigan homeowners hit this cap quickly. Talk to a tax professional for your specific situation.

Do I get billed if I just bought the home? Yes, eventually. The next tax bill (summer or winter) goes to whoever owns the property at the time the bill is issued. Your closing statement shows whether you owe back taxes to the seller as proration.

Need to Sell a Michigan Home?

If property tax pressure is part of why you are thinking about selling — high bills, escrow surprises, falling behind — know that selling cuts that ongoing cost. Offer Now Michigan buys homes for cash regardless of tax status. Call 810-425-5961 or visit our sell my house fast Michigan page for a no-obligation cash offer within 24 hours.

For more on Michigan property taxes, see our pillar guide on Michigan property taxes for homeowners, or read our guide to Michigan uncapping taxes.