Be prepared for next year's property tax bill before you buy.
In Michigan, the taxes shown on a listing are usually what the seller pays now. After you buy, the bill can jump the next year because the city or township may reset the value used for taxes. This tool gives you a simple estimate so you are not surprised later.
Keller Williams Platinum
Catherine McMurray, REALTOR®
31525 23 Mile Road, Chesterfield, MI 48047
Cell: (586) 291-1492 Office: (586) 949-0200 c.mcmurray@kw.com
Each office independently owned and operated.
What to enter
Use the price you expect to pay for the home.
This is called the “millage rate.” Look it up using the Michigan Treasury Property Tax Estimator by choosing the county, city or township, and school district.
You can often find this on the listing, tax record, or city/township treasurer website.
Optional: enter a number from the assessor
If the assessor, treasurer, lender, or State estimator gives you a better number, enter it here. Otherwise, the calculator estimates this as half of the purchase price.
What to budget for
Buyer property tax planning summary
- Purchase price
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- Local tax rate
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- Main home?
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- Seller's current taxes
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- Estimated value used for taxes
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- Estimated yearly tax
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- Estimated monthly tax
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- Annual change vs seller
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Estimate only. Before closing, ask the local assessor or treasurer and your lender to confirm the number.
How to use this before you buy
- 1
Find what the seller pays now
Look at the listing, public tax record, or city/township treasurer website. Remember, this is the seller's bill, not always your future bill.
- 2
Look up the local tax rate
Use the official State of Michigan Property Tax Estimator. Pick the county, city or township, and school district. If you will live in the home, use the Homestead/PRE rate.
- 3
Compare the old bill to your possible bill
Enter the numbers here. The calculator estimates that Michigan may tax about half of the purchase price after the reset.
- 4
Ask before you close
Show the summary to your realtor, lender, and local assessor or treasurer. Ask: “Is my escrow based on the seller's old taxes or my estimated future taxes?”
Why this surprise happens in Michigan
Think of the seller's tax bill like an old phone plan. They may have had a lower bill for years because Michigan limits how fast the value used for their taxes can rise while they own the home. When the home is sold, that protected number can reset the next year.
That reset is often called “uncapping.” In simple terms, it means the city or township may calculate taxes using a newer value, often around half of the home's market value. So a buyer should not assume the seller's current tax bill is the number they will pay in the future.
Sources and assumptions
Simple formula
Estimated yearly tax = value used for taxes × local tax rate ÷ 1,000 — per the East Grand Rapids tax bill estimator, which explains that millage is the tax amount for every $1,000 of taxable value.
What this calculator assumes
By default, this tool estimates the future taxable value as 50% of the purchase price. The City of Southfield uncapping overview explains that after a sale, taxable value generally rises to assessed value, which is usually about 50% of market value. Your assessor may use a different value, so replace the estimate if you get an official number.
Why the number can change after purchase
Per the Michigan Department of Treasury — Change of Ownership page, a transfer of ownership can cause taxable value to uncap in the calendar year following the transfer. Some transfers are exempt, but a regular home purchase often triggers the reset.
Local tax rates
The Michigan Property Tax Estimator and Millage Rate Database let people estimate current property taxes and compare local tax rates across Michigan. The underlying Treasury estimator currently uses 2024 millage rates; 2025 rates are scheduled to post in August 2026. It shows both Homestead/PRE and Non-Homestead rates and does not include every special assessment or unusual case.
What this tool does not do
- It does not pull the tax rate for you. You enter the rate from the State estimator.
- It may not include special charges or special assessments on a property.
- It does not calculate closing prorations, summer/winter tax splits, or PRE filing deadlines.
- It does not handle special exemption situations, such as some family transfers or trust transfers.
