You worked hard all year, earned a $5,000 bonus, and then watched in disbelief as only $3,350 landed in your account. Where did the other $1,650 go? Bonus withholding is one of the most misunderstood payroll topics in America. The good news: your bonus isn't being taxed at a special "penalty rate" — the withholding just looks dramatic because of how payroll processes supplemental wages.
When your employer pays a bonus separately from your regular paycheck, the IRS allows them to withhold federal income tax at a flat 22% supplemental rate. This is the most common method used by US employers. On a $5,000 bonus, that's $1,100 in federal income tax withholding alone — before FICA taxes (7.65%) add another $382.50.
If your employer adds your bonus to your regular paycheck rather than paying it separately, they must use the aggregate method. Your employer combines your bonus with your regular wages for that pay period, calculates withholding on the total as if it were your normal pay, then subtracts what would have been withheld without the bonus. The result is often a higher withholding rate than the 22% flat rate — especially if the combined amount pushes you into a higher bracket calculation.
💡 Important: Over- or under-withholding on a bonus does NOT change how much tax you ultimately owe. The withheld amount is just a prepayment. At tax time, your actual liability is calculated on your total annual income, and you receive a refund or pay additional tax to square the balance.
For the highest earners receiving bonuses above $1 million in a single year, the IRS requires withholding at 37% on the amount over $1 million. This only applies to truly exceptional bonus recipients — a small fraction of American workers — but it's worth knowing the rule exists.
Social Security (6.2%) and Medicare (1.45%) are applied to bonuses just like regular wages. If you've already crossed the Social Security wage base ($176,100 in 2026) through your regular salary by the time your bonus is paid, you won't owe Social Security on the bonus — only Medicare. This is why some employees who receive year-end bonuses see a slightly higher net amount than they expected.
While you can't change how your employer withholds from a bonus, you can take actions that reduce your actual tax liability on the bonus income. First, if you haven't maxed out your 401(k) for the year, ask HR if you can have a larger portion of your bonus directed there (up to the $23,000 2026 limit). Pre-tax 401(k) contributions reduce your taxable income dollar-for-dollar. Second, if you can time a charitable contribution in the same year as a large bonus, you can itemize those deductions to offset bonus income. Third, funding an HSA to its annual maximum ($4,300 single / $8,550 family in 2026) reduces taxable income as well.
Gift cards, merchandise, travel, and other non-cash rewards provided by your employer are generally considered taxable compensation at their fair market value — with a narrow exception for de minimis fringe benefits (low-value, occasional items like a holiday turkey or branded merchandise). If your employer gives you a $500 gift card as a performance bonus, that $500 should appear on your W-2 and is taxed as ordinary income. Some employers "gross up" non-cash awards to cover the tax burden so the employee receives the full intended value.
Model exactly how much of a raise or bonus you'll actually keep after all taxes.
Use the Pay Raise Calculator →After a significant bonus, consider running a new paycheck calculation to verify that your year-to-date withholding still aligns with your expected annual tax liability. A large bonus may have pushed your effective tax rate higher than anticipated. If so, you may want to add a small amount to your W-4 Step 4(c) extra withholding for the remainder of the year to avoid an April surprise. Use our free pay calculator to model the impact and adjust accordingly.