Bonuses in Michigan are typically taxed at a combined withholding rate of about 34% before any local city tax, so most workers take home roughly 60% to 66% of the gross amount. That figure comes from a flat 22% federal withholding on supplemental wages, Michigan’s 4.25% flat income tax, and 7.65% in Social Security and Medicare. If you live or work in one of the state’s 24 cities with a local income tax, another 0.5% to 2.4% comes off the top.
The Federal Piece: 22% Flat
The IRS classifies bonuses as “supplemental wages,” which lets your employer withhold at a flat 22% rate rather than running the bonus through the regular payroll tax tables.1Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide – Section: 7. Supplemental Wages This is the method most Michigan employers use, and it’s why a $5,000 bonus shows $1,100 pulled for federal tax regardless of what bracket your salary sits in.
If your total supplemental wages for the year exceed $1 million, the portion above $1 million is withheld at 37%.1Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide – Section: 7. Supplemental Wages
Employers can instead use the aggregate method, which adds the bonus to your regular paycheck and withholds based on the standard tables. That approach usually pulls more federal tax up front because the combined amount temporarily lands in a higher bracket for that pay period.1Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide – Section: 7. Supplemental Wages Any over-withholding comes back as a refund when you file.
Michigan State Tax: 4.25%
Michigan applies its flat 4.25% income tax to bonuses the same way it applies it to regular wages.2Michigan Legislature. MCL Section 206.51 There are no brackets and no separate supplemental rate. The Michigan Department of Treasury confirmed 4.25% as the 2026 withholding rate.3State of Michigan. 2026 Michigan Income Tax Withholding Guide
Michigan’s $5,900 personal exemption for 2026 reduces your taxable income on the annual return but does not change what comes out of the bonus paycheck itself.3State of Michigan. 2026 Michigan Income Tax Withholding Guide
Social Security and Medicare: 7.65%
Bonuses are subject to the same FICA taxes as regular pay: 6.2% for Social Security on wages up to the $184,500 base limit, and 1.45% for Medicare on every dollar.4Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates5Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet Once your year-to-date wages pass $184,500, the Social Security piece stops and only the 1.45% Medicare tax continues.
Higher earners face an extra 0.9% Medicare surtax. Employers must start withholding it once your wages cross $200,000 in a calendar year, though the actual filing threshold is $250,000 for married joint filers and $125,000 for married filing separately.6Internal Revenue Service. Topic No. 560, Additional Medicare Tax Any difference gets reconciled on your return.
City Income Tax If You Live or Work in One of 24 Cities
Twenty-four Michigan cities levy their own income tax, and that tax applies to bonuses.7State of Michigan. Which Cities Impose an Income Tax? Most charge 1% for residents and 0.5% for non-residents who work in the city. Several are higher:
- Detroit: 2.4% resident, 1.2% non-resident8State of Michigan. 2025 City of Detroit Income Tax Withholding Guide
- Highland Park: 2% resident, 1% non-resident
- Grand Rapids: 1.5% resident, 0.75% non-resident9City of Grand Rapids. Michigan Cities Imposing an Income Tax
- Saginaw: 1.5% resident, 0.75% non-resident
Residents owe the resident rate on all income, including bonuses. Non-residents pay the lower rate on wages earned within city limits. If you neither live nor work in a taxing city, no local tax applies.
Withholding Isn’t Your Final Tax Bill
The 22% federal rate is a withholding shortcut, not your actual bracket. When you file, the bonus is added to your other income and taxed at the standard federal rates.10Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
If your total taxable income sits in the 12% bracket, you’ll get part of that 22% back as a refund. If your income puts you in the 24%, 32%, or higher bracket, the withholding fell short and you’ll owe the difference in April. High earners can close the gap in advance by submitting an updated Form W-4 with an additional withholding amount on Step 4(c).11Internal Revenue Service. Form W-4, Employee’s Withholding Certificate (2026)
A $5,000 Bonus in Grand Rapids
Take a single Grand Rapids resident earning $75,000 who receives a $5,000 bonus. Under the flat-rate method, withholding breaks down like this:
- Federal (22%): $1,100
- Michigan (4.25%): $212.50
- Social Security (6.2%): $310
- Medicare (1.45%): $72.50
- Grand Rapids resident tax (1.5%): $75
Total withholding comes to about $1,770, leaving roughly $3,230 in take-home pay. That’s a combined withholding rate near 35.4%. Deductions, credits, exemptions, and your total annual income will shift the final number when you file.
What About Gift Cards and Other Non-Cash Bonuses?
Cash equivalents like gift cards are fully taxable no matter how small the amount, and your employer should include the fair market value on your W-2 with federal, state, and FICA withheld against it. A narrow exclusion exists for tangible personal property given as a length-of-service or safety achievement award, but it does not cover cash, gift cards, vacations, event tickets, or securities. Truly small and infrequent perks, such as an occasional company lunch or a holiday ham, can qualify as non-taxable de minimis benefits; the IRS has indicated items worth more than $100 generally do not.12Internal Revenue Service. De Minimis Fringe Benefits