A spot bonus is taxed as supplemental wages: your employer typically withholds federal income tax at a flat 22%, plus 6.2% Social Security and 1.45% Medicare, and often state income tax on top. That withholding is not your final tax rate. When you file your return, the bonus is added to the rest of your income and taxed at whatever marginal rate applies to your total, so you may owe a little more or get some back.
The Flat 22% Federal Withholding Rule
The IRS classifies spot bonuses as supplemental wages, which carry their own withholding rules. Under the flat-rate method, employers withhold federal income tax at exactly 22% on supplemental wages up to $1 million in a calendar year. Anything above the $1 million mark in a year is withheld at 37%.1Internal Revenue Service. Publication 15 (2026), Employer’s Tax Guide
Most payroll departments default to this flat method for one-off bonuses because it’s simple and predictable. The alternative, called the aggregate method, adds the bonus to your regular pay for the period and withholds based on the combined amount using standard tax tables. That can pull out more than 22% if the combined paycheck lands in a higher bracket for that period. Either way, any over-withholding comes back to you when you file.
Social Security and Medicare
On top of federal income tax, your employer withholds Social Security at 6.2% and Medicare at 1.45% from a spot bonus, exactly as it would from regular wages.2Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates The employer pays a matching share. Social Security withholding stops for the year once your total wages reach the 2026 wage base of $184,500.3Social Security Administration. Contribution and Benefit Base If you’ve already crossed that ceiling, the 6.2% won’t come out of the bonus.
Higher earners also face a 0.9% Additional Medicare Tax on wages above $200,000 ($250,000 for married couples filing jointly).4Internal Revenue Service. Topic No. 560, Additional Medicare Tax Employers must begin withholding the extra 0.9% once your wages exceed $200,000, regardless of your filing status. If your bonus pushes you past that line, the surtax applies to the excess.
Why the Withholding Isn’t Your Actual Tax Rate
Seeing 22% vanish from a $500 bonus can feel like a penalty on rewards. It isn’t. The 22% is a collection mechanism, not a tax rate. On your return, the bonus is folded into your other income and taxed at your marginal rate on the total. If your marginal rate is 24%, you’ll owe a little more than what was withheld. If it’s 12%, some comes back as a refund.
Put differently, the same bonus paid through your regular paychecks would likely produce roughly the same annual tax liability. The difference is timing and method, not the size of the eventual tax bill.
State Income Tax on Bonuses
Federal is only part of the story. Most states with an income tax also require withholding on supplemental wages, and the rules vary. Some states set a flat supplemental rate, which can run anywhere from about 3% to over 11%. Others require employers to withhold using the same method as regular wages. A handful of states have no income tax at all. Add federal, state, and FICA together and the withholding on a spot bonus can easily top 35%.
Gift Cards and Non-Cash Rewards
Some employers hand out gift cards thinking they avoid payroll tax. They don’t. The IRS treats cash and cash equivalents, including gift cards, gift certificates, and prepaid debit cards, as taxable wages regardless of amount.5Internal Revenue Service. De Minimis Fringe Benefits A $25 coffee shop card is reportable income. There is no de minimis exception for cash equivalents.
Actual non-cash property is different. Occasional low-value items such as flowers, a fruit basket, or event tickets can qualify as de minimis fringe benefits and stay untaxed.6Internal Revenue Service. Publication 15-B (2026), Employer’s Tax Guide to Fringe Benefits Tangible personal property given as a formal safety or length-of-service achievement award can be excluded up to $400, or up to $1,600 under a qualified written plan. The exclusion never covers cash or gift cards.7Internal Revenue Service. Publication 15-B (2026), Employer’s Tax Guide to Fringe Benefits
Gross-Ups: When the Employer Covers the Tax
Some employers want you to walk away with a specific net amount, say $500, so they “gross up” the bonus to cover the withholding. The basic math: divide the desired net by one minus the combined tax rate. If total withholding runs 34%, the calculation is $500 รท 0.66, or about $758. The employer pays $758, withholding takes $258, and you take home $500.
The exact divisor depends on whether you’ve already hit the Social Security wage base and whether you’re into Additional Medicare Tax territory. Grossing up is a real perk, but only about 13% of companies do it consistently, and many reserve it for larger awards. It’s fair to ask whether a bonus you’re offered is a gross or net figure.
How the Bonus Reaches You
A spot bonus arrives one of two ways. Many employers roll it into the next regular payroll cycle, which keeps administration simple. Others run an off-cycle payment as a separate deposit or check shortly after the achievement. The tax treatment is the same either way, and the payment shows up on your Form W-2 at year-end as part of total wages. If you’re comparing what hit your bank account to what you expected, check the paystub for the breakdown between federal, FICA, state, and any local withholding, because each piece is doing its own job.