Michigan's property tax system runs on two parallel value tracks that often diverge from each other — a structure that surprises many new homeowners. Every parcel has a State Equalized Value (SEV), set by the local assessor at roughly 50% of the property's true cash (market) value, consistent with the state constitution and General Property Tax Act. But your tax bill isn't based on SEV — it's based on a separate taxable value, which under Proposal A (a 1994 constitutional amendment) can only rise by the lesser of 5% or the rate of inflation each year, regardless of how fast the SEV or market value is climbing.
The statewide average effective rate — actual tax paid as a percentage of market value — is approximately 1.18%–1.19% (Tax Foundation: 1.19%; SmartAsset: 1.18%), moderately above the U.S. average of roughly 0.9%. This guide explains how SEV, taxable value, and the Proposal A cap interact; how the separate Headlee Amendment can force millage rollbacks; how the Principal Residence Exemption removes up to 18 mills of school tax for owner-occupants; recent 2025–2026 legislative activity around personal property and millage reform; how rates compare across major counties; and a worked example for a home in Oakland County.
Michigan's property tax structure is governed by two separate constitutional provisions that interact in a way that trips up many homeowners, especially recent buyers.
Local assessors determine a property's assessed value, which the state's equalization process adjusts to produce the State Equalized Value (SEV) — intended to represent roughly 50% of the property's true cash (market) value, per the Michigan Constitution and General Property Tax Act. SEV is recalculated annually and tracks market conditions relatively closely.
Your tax bill is calculated from a different figure — taxable value — not SEV. Under Proposal A, a 1994 constitutional amendment, a property's taxable value can increase each year by no more than the lesser of 5% or the rate of inflation, regardless of how much the SEV or true market value grows. For 2026, the state-mandated inflation rate multiplier is 1.027 (2.7%), meaning most existing properties' taxable value could rise no faster than 2.7% for that tax year, even in a hot local market.
This is the mechanic that most surprises buyers: when a property is sold or transferred, its taxable value "uncaps" the following year and resets to match the current SEV. If a long-term owner's taxable value had drifted well below SEV due to years of capped 5%-or-inflation growth, a new buyer's taxable value — and tax bill — can jump substantially in the year after purchase, even though the millage rate itself hasn't changed. Buyers should never assume the prior owner's tax bill will carry over.
Proposal A was designed to give existing homeowners predictable, inflation-limited tax growth — similar in spirit to California's Proposition 13, though with an inflation-based cap rather than a flat 2%, and applied through a separate taxable-value mechanism rather than directly capping assessed value itself.
Layered on top of Proposal A is the Headlee Amendment, passed by Michigan voters in 1978 — an older, distinct constitutional provision that caps how much revenue a local government or school district can collect from existing property without voter approval.
If the total taxable value of existing property in a jurisdiction (excluding new construction) grows faster than inflation, Headlee requires the jurisdiction's millage rate to be rolled back so that revenue growth from existing property is limited to the inflation rate, not the higher growth rate. For example, if inflation is 2% but existing taxable value rose 5%, the millage rate must be reduced so total revenue grows by roughly 2%, not 5%.
A subtle and often-overlooked interaction: when a property sells and its taxable value uncaps under Proposal A, that increase counts as existing property growth for Headlee purposes — not new construction. In a community with a lot of home sales, the cumulative effect of many uncapping events can trigger a Headlee rollback that reduces the millage rate for every taxpayer in the jurisdiction, even those who didn't sell.
Local voters can approve a "Headlee override" at the ballot box, restoring a millage rate to its original authorized level (up to the maximum allowed by the jurisdiction's charter or a separate voter-approved millage) despite an automatic rollback. These overrides are common on Michigan ballots and are a major reason millage rates vary so much between similar communities.
Michigan's main property tax break for owner-occupants isn't a credit or refund — it's an exemption from a specific portion of the school tax.
The Principal Residence Exemption exempts a qualifying owner-occupied home from the local school district's operating millage, up to 18 mills. Most Michigan school districts levy close to 18 mills in operating tax on non-homestead property, so a properly filed PRE can meaningfully reduce a homeowner's bill relative to a rental or investment property in the same district.
The property must be the owner's principal residence — defined by statute (MCL 211.7dd(c)) as the one place the owner has their "true, fixed, and permanent home" and intends to return to whenever absent. This also covers unoccupied residential or timber-cutover land that is contiguous to the dwelling.
Submit a PRE Affidavit (Form 2368) to the assessor for the city or township where the property is located. There are two filing windows each year: June 1 and November 1. Missing both means the exemption doesn't apply until the following tax cycle. This exemption is distinct from — and should not be confused with — Michigan's separate Homestead Property Tax Credit, which is claimed on your state income tax return.
A property that loses its PRE status (converted to a rental, second home, or investment property) becomes subject to the full local school operating millage the following year, which can add a meaningful amount to the bill — commonly in the range of a few hundred to well over a thousand dollars annually depending on the district's millage rate and the property's taxable value.
Michigan's property tax framework has been the subject of active legislative attention in the 2025–2026 session, though most of the largest proposals remain pending rather than enacted as of this guide's publication.
HB 5878 amends the General Property Tax Act to add a new section fully exempting personal property — business machinery, equipment, furniture, and tools — from taxation for taxes levied after December 31, 2026. This bill passed the Michigan House; check the Michigan Legislature's bill tracker for its current status in the Senate before assuming it has been enacted into law.
Introduced in April 2026, this eight-bill package would make far more sweeping changes, including eliminating the taxable-value "uncapping" (pop-up tax) that occurs when a property is sold, eliminating the State Education Tax (a separate 6-mill statewide levy that funds K–12 education), and eliminating Michigan's real estate transfer tax. According to legislative fiscal analysis, the package would reduce revenue to schools and local governments by more than $5 billion — a scale of change that has drawn significant pushback from municipal and school funding groups. As of this guide's publication, this package remains a proposal, not enacted law — confirm current status with the Michigan Legislature before relying on any of these changes.
Until and unless these bills are enacted, Michigan's existing SEV/taxable value/Proposal A/Headlee framework remains fully in effect. Homeowners considering a purchase or sale should not assume the uncapping mechanic will be eliminated — budget for a potential taxable value reset upon transfer under current law.
Because millage is set by county, city or township, school district, and any voter-approved overrides, effective rates vary across Michigan's 83 counties. The figures below are approximate effective rates (tax paid as a percentage of home value) from SmartAsset's county-level analysis; treat them as directional rather than exact for any specific parcel.
| County | Metro/Region | Approx. Effective Rate | Approx. Median Home Value |
|---|---|---|---|
| Ingham | Lansing | ~1.76% | $218,300 |
| Saginaw | Saginaw | ~1.52% | $159,000 |
| Wayne | Detroit | ~1.51% | $194,800 |
| Washtenaw | Ann Arbor | ~1.47% | $395,300 |
| Macomb | Detroit suburbs | ~1.28% | $266,500 |
| Genesee | Flint | ~1.28% | $200,400 |
| Oakland | Detroit suburbs | ~1.23% | $365,500 |
| Kent | Grand Rapids | ~1.03% | $325,400 |
Wayne County (Detroit) carries a relatively high effective rate (~1.51%) despite median home values well below several suburban counties — a pattern reflecting the city's higher millage needed to fund municipal services against a comparatively smaller tax base, plus historically high Detroit-specific city and school millage.
Ottawa County illustrates how the Headlee rollback keeps nominal millage low even as home values rise: in 2025, the county's maximum allowable millage after the Headlee rollback was 4.2023 mills, with its total 2025 millage (including voter-approved overrides) at 5.3685 mills — the fourth-lowest total county millage in Michigan, according to county fiscal reporting.
This example illustrates both the quick effective-rate estimate and the more detailed SEV/taxable-value mechanics, since Oakland County is a useful case study of a suburban Detroit market with meaningfully appreciating home values.
Using Oakland County's approximate effective rate of ~1.23% (SmartAsset, based on actual sale prices):
$350,000 × 1.23% ≈ $4,305 per year
For a buyer purchasing this $350,000 home in 2026, the local assessor sets SEV at approximately 50% of market value:
SEV: $350,000 × 50% ≈ $175,000
Because the sale triggers an uncapping event, the new owner's taxable value resets to match this SEV the following year: taxable value ≈ $175,000. If this is the buyer's principal residence and they file Form 2368 for the Principal Residence Exemption by the applicable June 1 or November 1 deadline, the home is exempt from up to 18 mills of local school operating tax; the county, city/township, and any non-operating school millage still apply to the full taxable value.
A neighbor who has owned an identically valued home since, say, 2016 would have a taxable value that grew no faster than the lesser of 5% or inflation each year since purchase — likely well below the current $175,000 SEV, since home values in many Oakland County submarkets have appreciated faster than the Proposal A cap over that period. Their tax bill could be meaningfully lower than the new buyer's, despite owning a home of equal current market value — directly analogous to the long-term-owner-vs-new-buyer gap seen under California's Proposition 13.
The quick effective-rate estimate (~$4,305) approximates what a new buyer with the Principal Residence Exemption in place should expect. Your actual bill depends on your specific city/township and school district's current millage (available from the county treasurer or your local assessor), your parcel's exact SEV and taxable value, and whether the PRE has been properly filed.
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