Why Your Property Taxes Go Up After You Buy a House in Michigan (And How to Plan for It)

Rules and figures current as of November 2026 — millage rates vary by municipality and school district; verify your specific property before acting.

Quick answer

The property tax bill the seller was paying is not the bill you'll pay. In Michigan, a home's taxable value is capped while one owner holds it and resets — "uncaps" — to its full assessed value the year after it sells. If the seller owned the house for a long time, your tax bill can land 30%, 50%, or more above theirs. That's not an error and it isn't a reassessment of your house in particular; it's how Michigan's system has worked since 1994.

Most buyers find out in year two, when their mortgage servicer runs an escrow analysis and the monthly payment jumps. This article is how to see it coming and plan for it before you make an offer.

How Michigan property taxes actually work

Three numbers matter, and they're all on the assessor's record for any property:

Assessed value (SEV). The assessor's estimate of half the home's market value. It moves with the market every year.

Taxable value. The number your tax bill is actually calculated from. Under Proposal A (1994), taxable value can only rise each year by the rate of inflation or 5%, whichever is less — no matter what the market does. For a long-term owner, taxable value drifts far below assessed value.

Millage. The tax rate, expressed in mills (dollars per $1,000 of taxable value). Your total millage depends on your city or township, county, school district, and any voted millages — it varies substantially across West Michigan, which is why two similar houses a few miles apart can carry very different bills.

Your bill = taxable value × millage.

What happens when the house sells

The year after a transfer of ownership, taxable value uncaps and resets to the assessed value. The gap that built up over the seller's ownership closes in one step — on your bill.

Illustration, not a quote: a house the seller bought in 2008 might have an assessed value of $150,000 (market value around $300,000) but a taxable value of $95,000 because of the cap. The seller's bill is calculated on $95,000. After you buy, yours is calculated on roughly $150,000. Same millage, same house — about 58% more tax.

The listing's "annual taxes" figure, and the seller's bill that your agent pulls, are both history. Neither predicts yours.

How to estimate your real bill before you offer

1. Pull the property record from the city or township assessor (most are online through BS&A or the municipality's site). Find the current assessed value (SEV), not the taxable value.
2. Find the total millage rate for that property — the assessor's record or the treasurer's office will have it, split into homestead and non-homestead rates. Use the homestead rate if you'll live there.
3. Multiply: SEV × (millage ÷ 1,000). That's your rough year-two bill.
4. Compare it to the seller's current bill. The difference is the surprise you just avoided.

Any lender can do this with you before you write the offer. I do it on every purchase, because the number feeds directly into your monthly payment and your approval.

The Principal Residence Exemption — file it

If the home is your primary residence, you're eligible for the Principal Residence Exemption (PRE), which exempts you from up to 18 mills of local school operating tax. On a typical West Michigan property that's a meaningful reduction, and it's the single biggest lever you have.

Two things to know:

• It isn't automatic. You file Form 2368 with the local assessor. Most title companies prepare it at closing and have you sign it — confirm that yours did, and confirm it was actually filed. If you file by June 1, it applies to that year's summer and winter bills; by November 1, to the winter bill.
• If the seller didn't have it — a rental, a second home, an estate — the "taxes" shown on the listing were calculated at the non-homestead rate, which is higher. Your bill with the PRE may land lower than you'd expect from the uncapping alone. Run the math with the right millage.

Michigan's two tax bills, and what they do to your escrow

Michigan bills property taxes in two installments: a summer bill (typically issued July 1) and a winter bill (typically December 1). The split between them varies by municipality.

Your lender collects one-twelfth of the estimated annual tax in each mortgage payment and pays the bills from escrow. Here's the part that catches people:

At closing, your escrow account is set up using the seller's current tax bill — the capped one. Nobody has a better number yet; the uncapped bill doesn't exist until the next assessment cycle. So for your first year, escrow is collecting too little.

In year two, the servicer runs an escrow analysis, sees the new bill, and does two things: raises your monthly escrow to match the real tax, and adds a shortage — the amount it under-collected in year one — spread over the next twelve months. Your payment can jump by a few hundred dollars a month, and the shortage portion is temporary but real.

This is the moment most Michigan homeowners first learn the word "uncapping."

What to do about it: know the number in advance (see above), and either set aside the difference monthly in year one or pay the shortage as a lump sum when the analysis arrives, which most servicers allow. The payment still rises to the correct ongoing amount, but you skip the twelve-month catch-up.

What this means for your purchase

• Qualify on the real number. When I calculate your debt-to-income ratio, I use the estimated uncapped, PRE-adjusted tax — not the seller's bill. A lender who uses the seller's bill is approving you for a payment that doesn't exist yet.
• Compare houses on taxes, not just price. Two $275,000 houses in different townships can differ by well over $100 a month in tax. That's worth knowing before you choose.
• Ask about the seller's ownership length. A house owned for twenty years has a bigger uncapping gap than one that sold three years ago. Longer ownership, bigger jump.
• New construction has its own version: the first bill is often based on land value only, and the full bill arrives once the house is assessed. Plan for it.

Frequently asked questions

Why did my property taxes go up so much after I bought my house in Michigan? Because the taxable value uncapped. Michigan caps annual increases in taxable value while one owner holds the property; when it sells, taxable value resets to the full assessed value the following year. The longer the seller owned it, the bigger the jump.

What is uncapping in Michigan property taxes? The reset of a property's taxable value to its state equalized (assessed) value in the year after a transfer of ownership, removing the cap that limited increases under the prior owner.

How do I estimate property taxes on a house I want to buy in Michigan? Multiply the current assessed value (SEV) by the homestead millage rate for that municipality, divided by 1,000. Don't use the seller's current bill or the listing's tax figure — both reflect the old capped value.

What is the Principal Residence Exemption? A Michigan exemption from up to 18 mills of local school operating tax for a home that is your primary residence. You file Form 2368 with the local assessor; title companies often prepare it at closing. Confirm it was filed.

Why did my mortgage payment go up in the second year? Most likely an escrow analysis: your servicer discovered the real (uncapped) tax bill is higher than what escrow was collecting, raised the monthly amount, and added a catch-up for the year-one shortage.

Can I pay the escrow shortage all at once? Usually, yes. Paying the shortage as a lump sum avoids the twelve-month catch-up, though your ongoing payment still rises to the correct amount.

When are Michigan property taxes due? Two bills: summer (commonly issued July 1) and winter (commonly issued December 1). Due dates and the split between bills vary by municipality.

Who do you work with in West Michigan? Buyers and homeowners across Grand Rapids, Grandville, Wyoming, Kentwood, Rockford, Ada, Jenison, Caledonia, Holland, and the surrounding Kent, Ottawa, Allegan, and Barry county communities.

Looking at a house and want to know what the taxes will actually be before you offer? Send me the address. I'll pull the assessed value and millage and give you the real number — the one your payment will be built on, not the one on the listing.

Joe Bastien · Bastien Mortgage LLC NMLS #2392887 · Company NMLS #2852005 616-369-0021 · joe@bastienmtg.com · bastienmortgagemi.com 446 Hubbard St NE, Grand Rapids, MI 49525 Equal Housing Opportunity

This article is educational and is not a loan offer, approval, or commitment to lend, and is not tax or legal advice. All loans are subject to underwriting approval. Figures are illustrative; actual assessed values, millage rates, exemptions, and billing schedules vary by property and municipality. Consult your local assessor or a tax professional for your specific situation. Current as of November 2026.