Michigan property tax appeal: how to fight your residential assessment

Last updated 2026-07-10

What is a Michigan property tax assessment and why is yours probably wrong?

Michigan law requires your local assessor to set your assessed value (AV) at exactly 50% of your home's true cash value (TCV), which is basically market value. That rule comes straight from MCL 211.27a(1) ^[1]. Sell your home for $300,000 and your AV should read $150,000. Your taxable value is a separate, capped number that rises by inflation or 5%, whichever is smaller, until the property changes hands.

Assessors are people running mass-appraisal models. They revalue thousands of parcels at once from sales data, neighborhood averages, and property records that may be years stale. Errors creep in. A basement finish that never happened, a bathroom counted twice, a garage that burned down two winters ago. The model also has no clue your foundation is cracked or your roof is on its last season.

The result is that your AV can easily sit 5 to 15 percent above where it belongs. A $20,000 overassessment in a community with a 40-mill combined rate costs you about $800 a year. Every year. Until you fix it.

You don't need a lawyer or a contingency firm for this. You need the right evidence and a working grasp of the three-stage appeal process Michigan hands you for free.

What are the three levels of Michigan property tax appeal?

Michigan gives residential owners three shots, and you take them in order.

Level 1: Board of Review (BOR). Your local Board of Review meets in March. The schedule sits in MCL 211.29, which sets the board's convening the second week of March ^[2]. You must appear in person or file a written protest to keep your right to go higher. This is the cheapest, fastest route, and plenty of assessors settle right here.

Level 2: Michigan Tax Tribunal (MTT). If the BOR won't give you the reduction you need, file a Small Claims Division petition with the MTT. For principal residence (homestead) properties assessed at $200,000 or less (assessed value, not market value), the deadline is July 31 of the same tax year ^[3]. Properties above that AV threshold, or non-homestead properties, run through the Entire Tribunal division and its more formal rules. The Small Claims filing fee is currently $25 ^[3].

Level 3: Court of Appeals. After an MTT final order, you can appeal to the Michigan Court of Appeals on questions of law. For a single-family home, this is rarely worth the cost.

One warning. Skip the March BOR and you cannot reach the MTT for that tax year, unless your appeal claims an unconstitutional assessment (comparing your assessment ratio to your neighborhood's). Missing the BOR is the single most common and most expensive mistake Michigan homeowners make.

Level	Where	Deadline	Fee	Typical outcome
Board of Review	Local municipality	Second week of March	Free	Informal negotiation, same day
MTT Small Claims	Lansing / remote	July 31 (homestead ≤$200k AV)	$25	Hearing in 6-18 months
MTT Entire Tribunal	Lansing	May 31 (non-homestead)	$175-$300+	More formal, often 1-2 years
Court of Appeals	State appellate court	21 days after MTT order	Varies	Rare for residential

What is the March Board of Review and how do you prepare for it?

The Board of Review is three locally appointed residents, not elected officials, who hear your protest and can lower your assessment on the spot. Meetings run the second Monday through the second Friday of March, with evening and Saturday sessions required by statute so people with jobs can attend ^[2].

Call your township or city assessor's office in January for the exact schedule. Some jurisdictions allow phone or Zoom hearings. Many still want you in the room. You can submit a written protest if you truly can't appear, but showing up beats it, because you can answer questions live.

What to bring:

1. Your assessment change notice (the postcard mailed in late February) 2. A printout of three to five recent comparable sales (comps) in your neighborhood showing lower per-square-foot values than your assessment implies 3. Photos or repair estimates documenting any physical defects 4. A printout of your property record card (from the assessor's website or office) showing any data errors

The board members are not appraisers. They respond to clear, simple evidence. Don't hand them a 40-page binder. Give them a one-page summary with your requested value, your three best comps, and one or two photos if the house has condition problems. Make your case in under five minutes. Ask for a specific dollar figure, not "a reduction."

A data error is your fastest win. Correcting a wrong square footage or deleting a bathroom that doesn't exist is unambiguous, and boards fix those the same afternoon.

How do you find comparable sales to support your Michigan appeal?

Comps are the spine of any assessment appeal. The Michigan Tax Tribunal has said again and again that sales of similar properties in the same market area are the best evidence of true cash value. MTT valuation guidance describes "an arm's-length sale of the subject property" as the most reliable indicator of true cash value ^[4].

For a BOR hearing, use sales from roughly January 1 of the prior year through the assessment date (December 31 of the prior year). The MTT works off the same valuation date.

Where to find them:

• Michigan equalization data. The State Tax Commission publishes sales studies by county. County equalization departments post sales data publicly too ^[5].
• Your county's online property search. Oakland, Wayne, Kent, and most Michigan counties let you search recent sales by subdivision or street.
• Zillow and Redfin closed sales. Fine as a starting point. Verify each against county records.
• Realcomp or MLS data. Know a real estate agent? A quick pull of the last 12 months of closed sales in your neighborhood gives you clean numbers.

A good comp checks these boxes: same general neighborhood, sold within 12 months of the assessment date, size within 15 to 20 percent of your gross living area, similar age, similar condition. Adjust in your head for the differences. If your house has no garage and the comp does, that comp reads a little high for your purposes.

Once you have three to five comps, divide each sale price by its square footage. Average those. Multiply by your square footage. That's a rough TCV for your home. Half of that is your target AV. If it lands well below your current AV, you have a case.

How do you file a Michigan Tax Tribunal petition without a lawyer?

Filing with the MTT is genuinely not hard. The tribunal runs an online e-filing system at michigan.gov/taxtrib ^[3]. You create an account, pick "Small Claims" for homestead properties at or under $200,000 AV, and fill out the petition form.

The petition asks for:

• Parcel identification number (on your tax bill)
• Current assessed value and the value you believe is correct
• A short statement of why your assessment is wrong
• Your BOR protest date and outcome (this proves you exhausted Level 1)

You have until July 31 of the tax year for homestead Small Claims cases ^[3]. Do not miss it. The MTT is strict about jurisdiction. A petition filed August 1 gets dismissed, full stop.

After you file, you get a docket number and, later, a hearing notice. Small Claims hearings often happen by phone or video. The hearing officer asks you to present your evidence, then the assessor (or their representative) responds. Small Claims needs no legal citations and no formal appraisal. Your comps, your property record card corrections, and a clear explanation carry most cases.

Want a document-by-document walkthrough and language that tends to land with hearing officers? The TaxFightBack DIY Appeal Kit covers the Michigan MTT process step by step.

One practical tip. Call the MTT clerk's line (517-335-9760, per their published directory) with procedural questions. They are more helpful than you'd expect, and they'll tell you if you're missing a required document before your hearing date.

What is the Michigan Tax Tribunal Small Claims deadline and what happens if you miss it?

July 31. That date is fixed by MCL 205.735a(6) for principal residence properties with AV at or below $200,000 ^[3]. No exceptions. The MTT has no power to grant extensions on assessment appeals, unlike some civil courts.

If your AV tops $200,000, or the property isn't your homestead, the MTT Entire Tribunal deadline is May 31 ^[3]. That's earlier, and it trips people up every single year.

Miss both deadlines and you're done for that tax year. You can appeal next year's assessment when the notice lands in February. That stings if you're carrying a large overassessment, because you leave a full year of money on the table.

A few edge cases worth knowing:

• Discovered the error after July 31 because of assessor fraud or a mutual mistake? MCL 211.53a sometimes lets you recover, allowing refunds for up to three years of overpaid taxes tied to clerical errors or mutual mistakes of fact ^[6].
• Poverty exemptions (MCL 211.7u) run on a separate track, decided at the BOR level and renewable yearly. Missing an appeal deadline doesn't touch your ability to apply for the poverty exemption next year.

How do Michigan's principal residence exemption and assessment caps affect your appeal?

Michigan stacks two separate systems on top of each other, and mixing them up is the second most common mistake homeowners make.

Your assessed value (AV) is the assessor's 50%-of-TCV figure. This is what you appeal.

Your taxable value (TV) is what your actual bill is calculated on. TV is capped at the prior year's TV times the lesser of 1.05 or the inflation rate, the Proposal A cap from the 1994 constitutional amendment ^[7]. TV can never exceed AV. When a property sells, TV uncaps and resets to equal AV.

So if you bought five years ago when values were lower, your TV may already sit well below your AV, meaning your bill isn't as ugly as your AV suggests. Check your TV on your tax bill before you spend time appealing. If TV runs far below AV, the immediate savings from an AV cut may be smaller than you expect, though correcting AV still shields you from future TV growth and fixes the record.

The Principal Residence Exemption (PRE) is a third, separate thing. It exempts your homestead from the 18-mill school operating levy, which saves most homeowners $1,500 to $3,000-plus a year ^[8]. If you own and occupy your home and haven't filed a PRE affidavit, file one now with your local assessor. That's free money on a one-page form. It doesn't affect your appeal. Do it anyway.

Want to see how Michigan's capped-value system compares to other states? Our Montgomery County property tax breakdown lays it out.

What evidence wins at the Michigan Tax Tribunal?

The MTT reviews value de novo, meaning it re-determines your true cash value from scratch on the evidence you present. The assessor carries the initial burden to support their value. Put credible opposing evidence on the table and the burden shifts ^[4].

For Small Claims, the strongest evidence, roughly in order:

1. Arm's-length sales of comparable properties. Recent sales, adjusted for differences, are the standard. Three to five comps with a clean adjustment grid beat almost anything else. 2. A licensed appraisal. An appraisal from a Michigan-licensed appraiser is close to decisive but runs $400 to $700. Worth it on a high-value property. Probably not on a $150,000 home. 3. Data errors in the property record. If the card says 3 full baths and you have 2, that's a clean correction. 4. Listing price and days on market. A home sitting 180 days at a price well below AV times 2 is evidence the assessor is wrong. 5. Condition documentation. Photos and contractor estimates for major defects (foundation, roof, HVAC, environmental issues) support a below-average condition adjustment.

What flops: your personal opinion of value, a Zestimate on its own, or complaints about how high the tax bill is. The MTT sets value and nothing else. If the value is right, they can't lower it because you can't afford the taxes.

Mass appraisal models have known error rates. Nobody has published a precise statewide figure for Michigan, but a University of Chicago study of Detroit and studies of mass appraisal accuracy in comparable markets put the coefficient of dispersion around 10 to 15 percent in residential markets ^[9]. That range matches what MTT hearing officers see in contested cases.

How much can you realistically expect to save on your Michigan property tax bill?

It depends on how wrong your assessment is and your local millage rate. Michigan rates vary hard: rural townships often run 25 to 30 mills total, while parts of Detroit clear 70 mills ^[10].

The math is simple. Mills times taxable value, divided by 1,000, equals your bill. Knock $20,000 off your assessed value and your taxable value (which can't exceed AV) eventually follows, saving about $500 a year at 25 mills or $1,400 a year at 70 mills.

For most suburban owners in Wayne, Oakland, Macomb, Kent, or Washtenaw counties, a successful appeal on a moderately overassessed home saves $500 to $1,500 a year. That's real money for a $25 filing fee and a few hours of work.

Contingency firms typically take 30 to 50 percent of the first year's savings ^[11]. On $1,000 of annual savings, that's $300 to $500 handed away. For a single-family home, the DIY math wins nearly every time.

Some jurisdictions have worse reassessment histories than others. Detroit went through a well-documented stretch of extreme overassessment. A University of Chicago study found Detroit properties in the lowest value tier were assessed at effective rates four to six times higher than higher-value properties during 2009 to 2015 ^[9]. If you're in Detroit or a similar market, the odds your assessment has an error run higher than average.

What is the State Tax Commission's role and how does the equalization process work?

Every spring, the Michigan State Tax Commission (STC) and county equalization departments run an annual equalization process to check whether each jurisdiction's assessments actually average 50% of true cash value ^[5]. They use sales ratio studies, comparing recent arm's-length sales to the assessed values of those same sold properties.

If a township's aggregate ratio comes in under 50% (assessments generally too low), the county equalization director applies an equalization factor and bumps everyone's assessed value up. If the ratio runs over 50%, values get trimmed.

This matters for your appeal because it tells you whether your jurisdiction tends to run high or low. The STC publishes annual equalization reports by county ^[5]. If your county's factor came in above 1.0, your assessor's base values were already too high before equalization. That's an extra argument in your pocket.

The STC also writes assessment rules and certifies assessors. If you believe your assessor engaged in systematic discrimination or ignored appraisal standards, you can file a complaint directly with the STC. That process is separate from a tax appeal, and it moves much slower.

Curious how county-level assessment oversight runs in other big metros? See our Cook County tax assessor tax bill guide.

Are there special exemptions that could reduce your Michigan property tax beyond an appeal?

Yes, and this is where most homeowners leave money behind.

Principal Residence Exemption (PRE). As noted above, it exempts your home from the 18-mill school operating levy. File Form 2368 with your local assessor if you haven't ^[8]. You must own and occupy the property as your principal residence by June 1 to get it for that tax year.

Poverty Exemption (MCL 211.7u). If your household income falls below the federal poverty guidelines, you can apply for a full or partial exemption from property taxes. The application goes to your local Board of Review in March. Income thresholds are set locally but must meet at least the federal poverty level ^[6].

Senior citizen and disabled veteran exemptions. Michigan runs several targeted exemptions. Disabled veterans with a 100% service-connected disability rating received a full property tax exemption starting in 2014 under MCL 211.7b ^[6]. Surviving spouses of eligible veterans can also qualify. Worth checking if it fits your household.

Homestead Property Tax Credit. This is a state income tax credit, not an assessment reduction, for lower-income homeowners. If your household income sits under roughly $63,000 (the threshold adjusts yearly) and your property taxes exceed a set percentage of your income, you may get a credit on your Michigan return ^[8]. File Form MI-1040CR.

These exemptions run independent of an appeal. Pursue both at once.

What mistakes kill most Michigan property tax appeals?

These are the patterns that show up at BOR and MTT hearings over and over.

Skipping the BOR. No BOR appearance, no MTT filing. That's non-negotiable under MCL 205.735a for most appeal types ^[3]. Even if the BOR feels like a rubber stamp in your town, you have to go.

Missing the July 31 MTT deadline. The tribunal dismisses late petitions without mercy. Set a calendar reminder for July 15. Give yourself two weeks of runway.

Using bad comps. A comp from a different school district, or one that sold three years back, or a foreclosure, gets attacked immediately. Foreclosures and bank-owned sales are not arm's-length, and the MTT gives them little weight.

Arguing the wrong thing. Telling the BOR your taxes are higher than your neighbor's is not an assessment appeal. Telling them your TCV should be $240,000, not $280,000, because three comparable homes sold for $230,000 to $250,000, is an assessment appeal. Know the difference.

Taking the assessor's first offer without pushing. Assessors sometimes float a token cut at the BOR to make you go away. If the offer doesn't get you to the right number, decline it and file with the MTT. You can always accept later. You can't un-accept.

Not pulling the property record card first. Data errors are free wins. Request the card before you do anything else. Wrong square footage, wrong bathroom count, wrong basement finish, wrong year built, all correctable without a single comp.

Frequently asked questions

What is the deadline to appeal a Michigan property tax assessment?

For principal residence (homestead) properties with an assessed value at or below $200,000, the Michigan Tax Tribunal Small Claims deadline is July 31 of the tax year, under MCL 205.735a(6). Non-homestead properties and higher-value homes face a May 31 MTT deadline. You must also appear at the March Board of Review before filing with the MTT, or you lose your right to appeal.

Do I have to hire a lawyer or property tax consultant to appeal in Michigan?

No. The MTT Small Claims Division is built for self-represented homeowners. A $25 filing fee and an online petition are all you need to start. Bring three to five comparable sales, correct any data errors on your property record card, and present a clear argument for your requested value. Contingency firms take 30 to 50 percent of first-year savings; for most homes, the DIY approach keeps more money in your pocket.

What is the difference between assessed value and taxable value in Michigan?

Assessed value (AV) is 50% of the assessor's estimate of your home's market value, required by MCL 211.27a. Taxable value (TV) is the capped figure your actual bill is calculated on; it rises by the lesser of 5% or inflation each year under Michigan's Proposal A. TV resets to equal AV when the property sells. Your appeal targets AV, but tax savings depend on where TV sits relative to AV.

Can I appeal my Michigan property tax assessment if I missed the Board of Review?

Generally no, for a standard valuation appeal. Missing the March Board of Review blocks you from the MTT for that tax year. Two exceptions exist: a claim of unconstitutional assessment (arguing your property is assessed at a higher ratio than similar properties) and a refund claim under MCL 211.53a for clerical errors or mutual mistakes of fact, which allows refunds for up to three prior tax years.

How does the Michigan Tax Tribunal Small Claims hearing work?

After you file your petition and pay the $25 fee, you get a docket number and, later, a hearing notice. Small Claims hearings are often held by phone or video conference. A hearing officer (not a judge) hears both sides. You present your comps and any data corrections; the assessor defends their value. The hearing officer issues a written order, usually within a few weeks. No formal rules of evidence apply.

What comparable sales work best for a Michigan property tax appeal?

Use arm's-length sales of similar homes in your neighborhood, sold within 12 months of December 31 of the prior year (the assessment date). Aim for three to five comps within 15 to 20 percent of your home's square footage, same general condition, similar features. Avoid foreclosures, bank-owned sales, and intra-family transfers; the MTT gives them little weight because they don't reflect open-market conditions.

What is the Michigan Principal Residence Exemption and how do I apply?

The PRE exempts your home from the 18-mill school operating levy, saving most Michigan homeowners $1,500 to $3,000-plus a year. File Form 2368 with your local assessor by June 1 of the tax year. You must own and occupy the home as your principal residence. There is no income limit. If you've owned for years without filing, back-file; you can claim the exemption retroactively in some cases.

How much does it cost to appeal a Michigan property tax assessment?

The Board of Review is free. The MTT Small Claims Division costs $25 to file. Hire an appraiser for supporting documentation and expect $400 to $700 for a residential appraisal in Michigan. An attorney or contingency firm adds 30 to 50 percent of first-year savings. For most residential appeals, a self-represented homeowner's total out-of-pocket cost runs $25 to $750, depending on whether you need a formal appraisal.

Can I appeal my Michigan property taxes if my home just sold at a lower price?

Yes, and a recent arm's-length sale of your own property is the strongest possible evidence of true cash value. If you bought your home in a legitimate open-market sale within the past year at a price below what your assessment implies (AV times 2), bring the closing disclosure or deed to your BOR hearing and MTT petition. The MTT has repeatedly treated a recent sale of the subject property as the most reliable TCV indicator.

What happens if the Board of Review denies my Michigan property tax protest?

You file with the Michigan Tax Tribunal. For homestead properties with AV at or below $200,000, use the Small Claims Division and file by July 31. Bring the same evidence you used at the BOR, plus the BOR's written denial if they issued one. The MTT conducts a completely fresh review; the BOR outcome doesn't bind them. Most MTT hearing officers are more consistent and evidence-driven than local BOR panels.

Does appealing my Michigan property tax assessment affect my neighbors?

No. Your appeal is specific to your parcel. A reduction in your assessed value doesn't trigger reassessments of neighboring properties. It also doesn't directly change the overall tax levy in your community, which local governments set independently of individual assessments. Your successful appeal simply corrects your property's record and lowers your personal tax bill going forward.

How far back can I get a Michigan property tax refund if I was overassessed?

Under MCL 211.53a, if an overassessment resulted from a clerical error or mutual mistake of fact (such as a wrong square footage both you and the assessor relied on), you can claim a refund for up to three prior tax years by filing a refund petition with the local unit of government. Standard valuation disagreements don't qualify for retroactive refunds; those affect only the year you successfully appealed.

What millage rate should I use to estimate my Michigan property tax savings?

Your total millage rate is printed on your summer and winter tax bills. Michigan rates range from roughly 20 to 25 mills in low-tax rural areas to over 70 mills in parts of Detroit. The statewide average is around 40 to 45 mills for homestead properties after the PRE exclusion. Divide your millage rate by 1,000 and multiply by your taxable value to get your annual bill; use the same formula to estimate savings from an AV reduction.

Sources

1. Michigan Legislature, MCL 211.27a - Assessment of property: Michigan requires assessed value to be set at 50% of true cash value under MCL 211.27a(1)
2. Michigan Legislature, MCL 211.29 - Board of Review meeting schedule: Board of Review convenes the second week of March per MCL 211.29
3. Michigan Tax Tribunal - Filing and Deadlines: MTT Small Claims deadline is July 31 for homestead properties with AV at or below $200,000; filing fee is $25; MCL 205.735a(6) controls
4. Michigan Tax Tribunal - Valuation Methodology Guidance: MTT guidance states the most reliable indicator of true cash value is an arm's-length sale of the subject property
5. Michigan State Tax Commission - Equalization and Assessment Administration: STC and county equalization departments publish annual sales ratio studies and equalization factors by county
6. Michigan Legislature, MCL 211.7b - Disabled veteran exemption; MCL 211.7u - Poverty exemption; MCL 211.53a - Refund for clerical errors: Disabled veterans with 100% service-connected disability receive full exemption under MCL 211.7b; poverty exemption under MCL 211.7u; refund for mutual mistakes under MCL 211.53a for up to three prior years
7. Michigan State Tax Commission - Proposal A and Taxable Value Cap: Michigan's 1994 Proposal A constitutional amendment caps taxable value increases at the lesser of 5% or inflation annually
8. Michigan Department of Treasury - Principal Residence Exemption and Homestead Property Tax Credit: PRE exempts homestead from 18-mill school operating levy; Form 2368 required by June 1; Homestead credit available via MI-1040CR for income under approximately $63,000
9. University of Chicago Law Review - Bernadette Atuahene & Christopher Berry, Taxed Out: Illegal Property Tax Assessments and the Epidemic of Tax Foreclosure in Detroit (2019): University of Chicago study found Detroit properties in the lowest value tier were assessed at effective rates four to six times higher than higher-value properties during 2009-2015; mass appraisal coefficient of dispersion typically 10-15% in residential markets
10. Michigan Department of Treasury - Property Tax Millage Rates by County: Michigan combined millage rates range from roughly 20-25 mills in rural areas to over 70 mills in Detroit
11. Lincoln Institute of Land Policy - Property Tax Assessment Administration (general industry data on contingency fee structures): Contingency firms typically charge 30 to 50 percent of first-year tax savings