Wisconsin does not have a special tax rate for overtime. Every overtime dollar is treated as ordinary income and taxed at the same graduated Wisconsin income tax rates that apply to your regular wages, from 3.50% at the bottom to 7.65% at the top.1Wisconsin Department of Revenue. Tax Rates If your overtime paycheck looks like it was hit with a penalty, that is a withholding issue, not a tax rate. And starting with the 2025 tax year, a new federal deduction lets many workers write off part of their overtime premium on their federal return, which lowers the combined bite.2Internal Revenue Service. One, Big, Beautiful Bill Act: Tax Deductions for Working Americans and Seniors
Why Your Overtime Check Looks Overtaxed
The gap between what gets withheld and what you actually owe is the usual culprit. When you work 55 hours instead of 40, payroll software sees a bigger check and assumes you earn that inflated amount every pay period. It annualizes the number, withholds as if your yearly income jumped, and you take home a smaller percentage than usual.
It is a timing problem. Withholding is a prepayment toward your annual tax bill. If payroll overshoots across the year, Wisconsin refunds the excess when you file Form 1. The state has no surcharge, no overtime bracket, and no penalty rate for income earned past 40 hours.
The Wisconsin Rates That Actually Apply
Wisconsin uses four progressive brackets. Only the dollars sitting inside each range get taxed at that range’s rate, so crossing into a higher bracket never raises the tax on income below it. For tax year 2025, single filers pay:1Wisconsin Department of Revenue. Tax Rates
- 3.50% on taxable income up to $14,680
- 4.40% on taxable income from $14,680 to $50,480
- 5.30% on taxable income from $50,480 to $323,290
- 7.65% on taxable income above $323,290
Married couples filing jointly pay:
- 3.50% on taxable income up to $19,580
- 4.40% on taxable income from $19,580 to $67,300
- 5.30% on taxable income from $67,300 to $431,060
- 7.65% on taxable income above $431,060
Say you file single, earn $48,000 in base pay, and overtime pushes your taxable income to $58,000. The first $14,680 is still taxed at 3.50%. The next slice up to $50,480 is taxed at 4.40%. Only the $7,520 above $50,480 reaches the 5.30% rate. Your effective state rate on the full $58,000 lands around 4.3%, below the 5.30% rate on your last dollars of overtime.
Wisconsin adjusts the bracket thresholds for inflation, so 2026 filing-year numbers may creep slightly higher, but the four rates themselves have been stable.
The New Federal Overtime Deduction
The One, Big, Beautiful Bill Act, signed July 4, 2025, created a federal income tax deduction for overtime pay for tax years 2025 through 2028. You can take it whether you itemize or claim the standard deduction.2Internal Revenue Service. One, Big, Beautiful Bill Act: Tax Deductions for Working Americans and Seniors
The deduction covers only the premium portion of time-and-a-half, meaning the extra half. If your regular rate is $30 an hour and overtime pays $45, the deductible amount is the $15 premium, not the full $45. The annual cap is $12,500 for single filers and $25,000 for joint filers, and it phases out once modified adjusted gross income exceeds $150,000 (or $300,000 joint). You must include your Social Security number, and married taxpayers must file jointly to claim it.
Only overtime that is required under the Fair Labor Standards Act and reported on your W-2 qualifies. Employers now have to report qualified overtime compensation separately so the figure can be verified. For a Wisconsin worker who regularly clocks overtime, this deduction can mean hundreds or thousands of dollars in federal tax savings. It does not touch your Wisconsin state income tax, because Wisconsin has not adopted a matching deduction.
A Wisconsin Bill Would Add a State Deduction
Assembly Bill 461 would create a Wisconsin income tax subtraction for overtime pay that mirrors the federal approach. The bill passed the Wisconsin Assembly in early 2026 and moved to the Senate.3Wisconsin State Legislature. Armstrong Votes to Exempt Tips, Overtime Pay Until it becomes law, overtime is fully taxable at the state level under the brackets above.
Federal Income Tax and FICA Also Apply
State tax is a smaller slice than what federal takes. Federal income tax brackets for 2026 run from 10% to 37%, and most Wisconsin workers earning overtime sit in the 12% or 22% bracket. When overtime is paid on a separate check as supplemental wages, employers apply a flat 22% federal withholding rate (37% on supplemental wages above $1 million in a year).4Internal Revenue Service. Employer’s Tax Guide That flat 22% is often higher than your real effective federal rate, which is another reason overtime looks overtaxed in the moment.
FICA applies the same way to overtime as to regular pay. Social Security tax is 6.2% on earnings up to $184,500 in 2026.5Social Security Administration. Contribution and Benefit Base Medicare is 1.45% with no cap, plus an extra 0.9% on wages above $200,000 for single filers. There is no refund mechanism for FICA the way there is for income tax, so a worker under the Social Security wage base pays 7.65% in combined FICA on every overtime dollar on top of state and federal income tax.
How to Stop Giving Up Too Much Each Paycheck
If you work overtime regularly and get a big state refund every spring, your withholding is set too aggressively. You are lending the state money at zero interest.
Wisconsin Form WT-4 lets you adjust your state withholding allowances. Claiming additional exemptions you are entitled to reduces what comes out of each check. If you tend to owe at tax time instead, you can claim fewer exemptions or ask your employer to withhold an extra flat dollar amount per paycheck on line 2. If you have already maxed out your exemptions and your refund is still large, Form WT-4A lets you reduce the overwithholding further.
On the federal side, updating your W-4 usually moves the needle more, because federal rates are higher. The IRS Tax Withholding Estimator can model how your overtime affects your yearly liability. Aim close to your actual bill, without going so low that you trigger an underpayment penalty.
One more lever worth knowing: if overtime is paid on a separate check from regular wages, Wisconsin lets employers use a flat supplemental withholding rate instead of the annualizing method. The rate most workers fall under is 5.30%.6Wisconsin Department of Revenue. Wisconsin Withholding Tax Guide This usually tracks closer to your real tax owed, but employers are not required to use it, and many payroll systems default to the annualizing approach.
Make Sure You Actually Qualify for Overtime
Not every worker is entitled to overtime, and that matters for the new federal deduction. Under the FLSA, you must be non-exempt to receive time-and-a-half for hours over 40 in a workweek.7U.S. Department of Labor. Overtime Pay The common exemptions cover executive, administrative, and professional employees who meet specific duties tests and earn at least $684 per week, or $35,568 per year.8U.S. Department of Labor. Fact Sheet: Exemption for Executive, Administrative, Professional, Computer and Outside Sales Employees Under the Fair Labor Standards Act
The federal overtime deduction applies only to overtime required under the FLSA. If you are an exempt salaried employee who receives extra pay for long hours, that compensation may not count as qualified overtime, and you cannot deduct it. Confirm your exemption status before you plan on claiming the deduction.