Bonus Tax Calculator
Free bonus tax calculator. See how much of your work bonus you actually take home after federal tax, state tax, Social Security, and Medicare withholding.
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How Bonuses Are Taxed: The Two Methods
The IRS allows employers to withhold taxes on bonuses using two methods. The flat rate method (most common) withholds exactly 22% for federal tax on bonuses up to $1 million, and 37% on amounts over $1 million. This is straightforward: a $10,000 bonus has $2,200 withheld for federal tax. The aggregate method combines your bonus with your regular paycheck, calculates withholding on the total as if it were a single payment, then subtracts what was already withheld for your regular pay. This often results in higher withholding because the combined amount pushes you into a higher bracket temporarily.
Important distinction: withholding is not the same as your actual tax rate. The 22% flat rate is a withholding convenience — your bonus is actually taxed at your marginal tax rate when you file. If your marginal rate is 12%, you will get a refund of the over-withholding. If your marginal rate is 24%, you will owe the difference. The flat rate is designed to be close to the average marginal rate for most Americans, but it is not exact for everyone. Calculate your total tax picture with our Take-Home Pay Calculator.
Strategies to Keep More of Your Bonus
Several strategies can reduce the tax impact of bonuses. Increase 401K contributions: if your employer allows it, you can elect to have some or all of your bonus contributed to your 401K, reducing taxable income. A $10,000 bonus fully directed to your 401K saves $2,200+ in federal tax alone. Time your bonus: if you have flexibility, receiving a bonus in January vs December can shift income to a lower-earning tax year. HSA contributions: maximize your Health Savings Account ($4,150 single/$8,300 family in 2026) — contributions are pre-tax and reduce your taxable bonus income.
Charitable contributions: donating a portion of your bonus to qualified charities generates a tax deduction if you itemize. Estimated tax payments: if you expect a large bonus, making an estimated quarterly payment can prevent a surprise tax bill at filing time. The most impactful strategy for most people is maximizing tax-advantaged retirement contributions — every dollar put into a 401K or IRA reduces your taxable income dollar-for-dollar. Use our 401K Calculator to see the long-term impact.