Michigan Used Car Sales Tax: 6% Flat, $12,000 Trade-In Cap in 2026

As of Oct 19, 2026, Michigan taxes a used car at a flat 6% with no local add-on. Buy from a dealer and the dealer collects it as sales tax; buy from a private seller and you pay it as use tax at a Secretary of State office when you transfer the title, on the purchase price or the car's retail value, whichever is higher. A trade-in at a licensed dealer cuts the taxable price by up to $12,000 in 2026, and buying from certain close relatives is tax-free.

Michigan's tax is simpler than Ohio's because you never look up a county or city rate. The tricky parts are the trade-in cap, which changes every January, and the family exemption, where two state agencies publish slightly different lists. I went through the Secretary of State's pages, Treasury's relative-transfer guidance and the state's trade-in rule on Monday, October 19, 2026. Both michigan.gov sites blocked my link checker, so I name those pages below with the date instead of linking them.

Dealer or private seller, it's 6%

The Secretary of State says most dealerships handle the paperwork and collect the 6% sales tax, and must file the title application within 21 days of delivery. In a private sale, the buyer has 15 days from the sale date to transfer the title and pays the title fee, registration and the 6% tax at an SOS office. The SOS FAQ lists a $15 title transfer fee, tax on "the full purchase price or fair market value, whichever is greater," and another $15 late fee past 15 days.

That "whichever is greater" line is the one that bites. Treasury's guidance says the 6% use tax applies to the greater of the purchase price or retail value, that Treasury makes the final call on what you owe, and that underpaying can mean the difference plus interest and penalties. So writing $500 on a $6,000 car can just buy you a letter later. If it really was cheap because it's rough, keep photos and repair quotes.

The trade-in credit, and why it's capped

Michigan only lets a trade lower the tax when you trade a motor vehicle to a licensed dealer toward another vehicle, and the trade value has to be separately stated on the invoice or bill of sale. Michigan Administrative Code R 205.15, as published by Cornell's Legal Information Institute, set the limit at $5,000 starting January 1, 2019, rising $1,000 every January 1, with the full agreed value eligible starting January 1, 2029. A 2026 trade-in examples handout dated July 1, 2026, posted by the Detroit Auto Dealers Association, confirms the 2026 cap is $12,000, and the Michigan Automobile Dealers Association says the same took effect January 1, 2026.

The handout's math is easy to copy. Trade an $8,000 car toward a $30,000 one and you're taxed on $22,000, which is $1,320. Trade a $16,000 car instead and only $12,000 counts, so the tax is on $18,000, or $1,080. If your trade is worth more than the car you're buying, the tax is zero, because the credit can't exceed the price. If you owe money on your trade, read our post on negative equity on a trade-in before you roll it into the new loan.

One thing people miss: none of this applies to a private sale. Swap cars with your neighbor and each of you owes use tax on the car you receive.

Family transfers are exempt, mostly

Treasury says the exemption under MCL 205.93(3)(a) covers a spouse, natural or adoptive parent or child, brother or sister, grandparent or grandchild, step-parent, step-child, step-brother, step-sister, a legal ward or legally appointed guardian with a certified letter, and in-laws. It doesn't cover aunts, uncles, cousins, nieces, nephews, step-grandparents, step-grandchildren or former spouses. A step-relationship still counts if the parent died while married but not if they divorced before the transfer.

This part is messy. Treasury's Revenue Administrative Bulletin 2018-5 lists grandparent-in-law as exempt and grandchild-in-law as not exempt. The SOS buying page lists grandchild-in-law as exempt, while another SOS FAQ lists grandparent-in-law. If your transfer depends on one of those two, call Treasury first. You don't bring proof to the SOS counter, but Treasury can ask for birth and marriage certificates later, and its page warns of a penalty of up to 100% of the tax for a claim that can't be proven. The SOS FAQ goes further and mentions up to 175 percent and possible prosecution.

Bought it out of state?

Treasury's use tax page says Michigan use tax applies to purchases made in other states when Michigan sales tax wasn't charged, and that tax on a vehicle bought from anyone who isn't a licensed dealer is paid to the Secretary of State before the registration transfers. If you paid sales tax to another state, bring the receipt and ask the SOS clerk how it's credited. I couldn't open an official page that spells out that credit, so I won't guess at it. Our out-of-state buying guide covers the paperwork.

Before the SOS visit

• Original title with the seller's section, odometer reading and signature filled in. No cross-outs.
• Michigan no-fault insurance proof and both IDs.
• A bill of sale with the real price, plus proof of relationship if you're claiming the family exemption.
• A VIN check on NMVTIS and a report you ran yourself; paying 6% on a salvage car you didn't know about stings twice.

Our Michigan title transfer guide walks through the SOS steps, the used car sales tax explainer compares states, and Michigan's lemon law post explains why a used car rarely qualifies. We're a licensed CARFAX and AutoCheck reseller and not affiliated with CARFAX, AutoCheck or Experian. Our mid October 2026 pricing was about $5.50 per guest report, about $4.50 for members and about $6.75 for the bundle, compared with roughly $39.99 to $44.99 retail. Confirm the price at checkout.

Sources

• Michigan Department of State, "Buying, selling, or leasing" and "Title transfer and vehicle registration" FAQs (michigan.gov/sos), read Oct. 19, 2026
• Michigan Department of Treasury, "Transferring a Vehicle Title to a Relative," Use Tax page and RAB 2018-5 (michigan.gov/taxes), read Oct. 19, 2026
• Mich. Admin. Code R 205.15 (via Cornell LII)
• 2026 Trade-In Sales Tax Exemption Examples for Dealers (rev. July 1, 2026)
• MADA: State of Michigan licensing topics