Cost Segregation Study in Michigan

Michigan is one of the simplest states in the country to run a cost segregation study in, and that simplicity is worth real money. Michigan conforms to the federal Internal Revenue Code on a rolling basis, which means the bonus depreciation you claim federally flows straight through to your Michigan return with no addback, no decoupling form, and no second depreciation schedule to maintain for the next twenty-seven years.

The Michigan individual income tax is a flat 4.25% and it starts from federal adjusted gross income. The Corporate Income Tax is 6.0% and starts from federal taxable income. In both cases the starting point already reflects your federal depreciation, so a study that produces a $500,000 federal deduction produces a $500,000 Michigan deduction in the same year.

How Michigan Income Tax Interacts With Federal Strategy

Because Michigan uses a single flat rate rather than graduated brackets, the state value of a cost segregation deduction is easy to compute and does not change with the size of the deduction. Every dollar of accelerated depreciation is worth exactly 4.25 cents of Michigan tax at any income level. There is no bracket management, no phase-out to model, and no surtax threshold to stay under.

What does change the math is Michigan's city income taxes. Twenty-four Michigan cities levy their own income tax under the Uniform City Income Tax Act. Detroit is the largest at 2.4% for residents and 1.2% for nonresidents. Grand Rapids and Saginaw are at 1.5%, Highland Park at 2.0%, and the remaining cities are generally 1.0% for residents. These city taxes start from federal AGI as well, so your cost segregation deduction reduces city taxable income too.

For a Detroit resident that pushes the combined state and local benefit of a deduction to 6.65%. That is more than double what a headline flat rate suggests, and it is the number most out-of-state cost segregation providers leave out of their Michigan projections entirely.

Michigan conforms to the federal passive activity loss rules of IRC Sec. 469. If your study generates a loss that is suspended federally because you do not qualify for short-term rental treatment or real estate professional status, the loss is suspended for Michigan too. The state does not offer a workaround.

Michigan Flow-Through Entity Tax

Michigan enacted its elective flow-through entity tax through Public Act 135 of 2021, applying retroactively to tax years beginning on or after January 1, 2021. The rate is tied to the individual income tax rate and is currently 4.25% on the entity's business income tax base attributable to Michigan.

Members receive a refundable Michigan credit for their share of the tax paid. Refundability is a meaningful advantage over states that offer only a nonrefundable credit, because a member whose Michigan liability is lower than their share of the entity-level tax still gets the full benefit rather than losing the excess.

Two mechanics matter. The election is made by submitting a payment through Michigan Treasury Online, and once made it is irrevocable for the year of the election and the two tax years that follow. That three-year lock is a real commitment. Before electing, model whether the entity will still be profitable and whether the owners will still be Michigan residents across all three years.

The federal point of the election is the same as everywhere else. The entity deducts the Michigan tax as a business expense on the federal return, which moves that portion of Michigan tax outside the individual state and local tax deduction cap.

Michigan Depreciation Conformity

Michigan is a full conformity state. It adopts the Internal Revenue Code in effect for the current year, and it does not require an addback of bonus depreciation under IRC Sec. 168(k) or a reduction of Section 179 expensing under IRC Sec. 179.

That means 100% federal bonus depreciation is 100% Michigan bonus depreciation. Section 179 at the full federal limit is allowed at the full federal limit for Michigan. There is no Michigan equivalent of the decoupling forms that Maryland, Indiana, and Minnesota taxpayers have to file.

The practical effect is that you maintain one depreciation schedule instead of two. Your federal basis and your Michigan basis are identical from acquisition through disposition. When you sell, federal gain and Michigan gain are the same number. That eliminates the single most common state-level cost segregation error, which is treating federal gain as the state number in a state where the two have quietly diverged.

Cost Segregation Considerations Specific to Michigan

Michigan investors should focus on three things that are genuinely local rather than on state conformity, which takes care of itself.

First, the city layer. If the property or the owner sits in a city that levies an income tax, model that return. A Detroit-resident investor who runs a study on a Detroit property is getting a 6.65% combined state and city benefit, and the city return is a separate filing that is easy to overlook when a national provider hands you a federal-only report.

Second, property tax uncapping. Under Proposal A, a Michigan property's taxable value is capped in the years you hold it but uncaps to the state equalized value in the year following a transfer of ownership. This is not an income tax issue, but it lands in the same year you are commissioning a study on a newly acquired building, and it can move your operating cash flow materially. It belongs in the same model as the depreciation acceleration, not in a separate conversation six months later.

Third, the disposition. Because Michigan basis tracks federal basis exactly, Section 1245 recapture on the short-life property identified by your study is ordinary income for Michigan at 4.25%, and unrecaptured Section 1250 gain is taxed at the same 4.25%. Michigan gives no preferential rate to long-term capital gains. That flat treatment means Michigan does not penalize the conversion of capital gain into ordinary recapture the way a state with a capital gains preference does. A cost segregation study in Michigan is close to a pure timing benefit at the state level, with no rate arbitrage working against you on exit.

Working With AE Tax Advisors in Michigan

AE Tax Advisors works with real estate investors, business owners, and high-income professionals across Michigan and all fifty states. We are a licensed CPA and IRS Enrolled Agent practice based in Billings, Montana, and we handle the engineering-based cost segregation study, the Michigan and city return treatment, the entity structuring, and the return preparation as one engagement rather than three vendors who do not talk to each other.

Michigan's clean conformity means the state modeling is fast, which frees the analysis to focus where the money actually is: whether you clear the passive activity hurdles to use the loss at all, whether the flow-through entity election is worth the three-year lock, and what the city return does to the number.

Related reading: the complete guide to cost segregation, our cost segregation study service, short-term versus long-term rental tax treatment, lookback studies and Form 3115, and multi-state tax planning.

Michigan tax rates, pass-through entity tax rules, and depreciation conformity provisions described on this page reflect law in effect as of August 2026 and are provided for general information only. State conformity changes frequently and often retroactively. Nothing here is tax advice for your situation, and no client relationship is created by reading it. Talk to us about your facts before acting.