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Wisconsin Bonus Paycheck Calculator

A bonus paid in Wisconsin is withheld at the flat 22% federal supplemental rate in 2026 (37% on amounts above $1 million), plus FICA of 7.65% and Wisconsin's graduated income tax (3.5% to 7.65%). Your final tax bill is settled when you file, not at withholding.

How are bonuses taxed in Wisconsin?

In Wisconsin, your employer withholds a flat 22% federal supplemental rate and 7.65% FICA, plus Wisconsin's graduated income tax (3.5% to 7.65%), so roughly 30–35% of a bonus is typically withheld up front. Withholding isn't your final tax: at filing time a bonus is ordinary income, so any over-withholding comes back as a refund. Against the 4 states Wisconsin borders, the same a $10,000 bonus is worth $6,505 here: Iowa keeps $150 more ($6,655), Michigan keeps $105 more ($6,610), Illinois keeps $35 more ($6,540) and Minnesota leaves $150 less ($6,355). Illinois, Iowa and Michigan are the only borders worth crossing for the tax alone.

Calculate your exact bonus take-home pay

Your bonus take-home

$3,518

from $5,000 bonusFor a $5,000 bonus · Wisconsin · single

Take-home 70%Taxes 30%
Bonus amount$5,000
Federal tax−$1,100
State tax—
Social Security−$310
Medicare−$73
Net bonus$3,518

Estimate based on 2026 federal and Wisconsin tax rules updated Oct 2026 How we calculate

Your details

Taxation method

Most common: a flat 22% federal rate is withheld on the bonus.

More options Base salary

What a bonus is actually worth in Wisconsin

On top of a $75,000 salary in Wisconsin, here is what each extra dollar survives federal tax, Wisconsin income tax and FICA in 2026:

BonusGrossWisconsin taxYou keepShare kept
$5,000 bonus$5,000$265$3,25365.0%
$10,000 bonus$10,000$530$6,50565.0%
$25,000 bonus$25,000$1,325$16,26365.0%

Wisconsin takes about 5.3% of that money on top of the 22% federal marginal rate and 7.65% FICA.

How Wisconsin ranks on bonuses

Across all 50 states and DC, Wisconsin ranks 34th for what a $10,000 bonus leaves in 2026, tied with 1 other state that levy no income tax on wages. That is $60 less than the median state ($6,565), and $488 more than California, where the same a $10,000 bonus leaves $6,017.

The best outcome anywhere is $7,035 in Alaska and the other states with no wage income tax, $530 more than Wisconsin keeps.

Wisconsin bonuses against the states next door

Crossing a state line changes what the same bonus is worth without changing what you are paid. Here is a $10,000 bonus in Wisconsin against the states it borders:

StateState income taxYou keepvs Wisconsin
Wisconsin$530$6,505—
Illinois$495$6,540$35 more
Iowa$380$6,655$150 more
Michigan$425$6,610$105 more
Minnesota$680$6,355$150 less

How Wisconsin bonus withholding works

Short answer: your employer withholds a flat 22% for federal income tax (the supplemental rate), plus 7.65% for Social Security and Medicare, plus Wisconsin withholding on top: typically 30–35% of a Wisconsin bonus withheld up front. Bonuses aren't actually taxed at a higher rate, though: at tax time they're ordinary income, and any over-withholding comes back in your refund. Here's how each piece works. Wisconsin is not alone: Idaho leave exactly the same $6,505.

  • Federal supplemental rate: Most employers withhold federal income tax from bonuses at a flat 22%, $2,200 on a $10,000 bonus, or 37% above $1 million a year, regardless of your regular bracket.
  • Wisconsin state tax: Bonus income is ultimately taxed through Wisconsin's graduated income tax (3.5% to 7.65%). The calculator estimates the Wisconsin share based on your inputs.
  • FICA taxes still apply: Social Security (6.2% up to the annual wage base) and Medicare (1.45%, plus 0.9% for high earners) come out of a bonus like any wage: $765 on $10,000.
  • Over-withholding is common: The flat 22% federal rate is often higher than your actual effective rate, and the difference comes back as a refund. In Wisconsin the whole $10,000 nets $6,505 once state tax and FICA are in.

Your actual bonus tax depends on your total annual income, not the bonus alone: these figures assume a $75,000 Wisconsin salary. Enter your own numbers above for an estimate that fits your situation.

Frequently Asked Questions

Typically 30–35%: a flat 22% federal supplemental withholding, 7.65% FICA, and Wisconsin's graduated income tax (3.5% to 7.65%). Your actual tax owed depends on your full-year income and may be lower: the difference comes back as a refund when you file.

The IRS requires employers to withhold federal income tax from supplemental wages (including bonuses) at a flat 22% rate for amounts up to $1 million, rising to 37% above that. Your employer may alternatively add the bonus to your regular paycheck and withhold using the aggregate method. Worked through for Wisconsin: a $10,000 bonus keeps $6,505: 65.0% of it, after $530 of Wisconsin income tax.

It depends on your total annual income and tax bracket. If the 22% flat withholding rate is higher than your actual effective rate on the bonus, you'll get the difference back as a refund; if you're in a higher bracket, you may owe more. On a $75,000 salary in Wisconsin, a bonus is taxed at about 22% federally plus 5.3% to Wisconsin, so the 22% flat rate is close to the mark at that income.

Yes: as regular income. Some employers withhold Wisconsin tax on bonuses at a supplemental rate, but what you ultimately owe is determined by Wisconsin's graduated income tax (3.5% to 7.65%) applied to your full-year income.

Splitting a bonus across pay periods can reduce withholding if your employer uses the aggregate method, which annualizes your income, but it changes the timing, not the amount you ultimately owe. Where you live changes the amount: Wisconsin ranks 34 of 51 on what a $10,000 bonus leaves, against $6,565 in the median state and $6,017 in California.

Against the 4 states Wisconsin borders, the same a $10,000 bonus is worth $6,505 here: Iowa keeps $150 more ($6,655), Michigan keeps $105 more ($6,610), Illinois keeps $35 more ($6,540) and Minnesota leaves $150 less ($6,355). Illinois, Iowa and Michigan are the only borders worth crossing for the tax alone. Wisconsin is not alone: Idaho leave exactly the same $6,505.

Wisconsin's brackets are relatively spread out compared to compressed-bracket states, meaning taxpayers move through rates more gradually. However, the starting rate of 3.54% is higher than many progressive states, which means even lower earners pay more than they might expect. A $100,000 earner pays an effective rate around 5%-6% (approximately $5,000-$6,000 annually), while the same earner in a flat-tax state like Pennsylvania would pay $3,070 (3.07% flat, though PA may have local EIT).

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