How Your Bonus Is Taxed and Why Withholding Looks High
The bonus hits your account and the first thing you notice is how much got taken out. That leads most people to conclude that bonuses get taxed harder than regular pay. That conclusion is wrong — but the confusion is completely understandable, because the withholding on a bonus often looks nothing like what you'd expect.
Bonuses Are Supplemental Wages — and That Changes How Withholding Works
The IRS classifies bonuses as supplemental wages: compensation paid in addition to an employee's regular rate of pay. This category also includes commissions, overtime, severance, back pay, prizes, and awards.
The classification doesn't change how the income is ultimately taxed. At year-end, your bonus is ordinary income — it flows into your income tax brackets exactly like your salary. What the supplemental wage classification does change is how your employer withholds from that payment. And that's where the disconnect comes from.
The Two Withholding Methods Employers Use
Most Common
22%
Flat Percentage Method
If the bonus is paid separately (or clearly identified), employers may withhold at the IRS supplemental flat rate of 22% — regardless of your actual tax bracket. Simple, but blunt. Jumps to 37% on supplemental wages above $1M in a calendar year.
Can Overshoot
Varies
Aggregate Method
If bonus is combined with regular wages without separation, the IRS requires the aggregate method. Annualizes the combined payment — a $10K bonus with a $4K biweekly check looks like $364K/year income to the formula. Can push withholding into the 24–32% range even for average earners.
What You Actually Owe on Your Bonus
Your bonus is taxed at your effective marginal rate — whatever bracket rate applies given everything else you've earned that year. Not a special bonus rate. Not 22% by definition. The withholding method your employer used has no bearing on what your actual tax liability is.
Consider Sofia, a marketing manager earning $72,000. She receives an $8,000 year-end bonus:
Sofia · $72,000 Salary + $8,000 Bonus · Single · 2025
Salary (gross)$72,000
Bonus (gross)$8,000
Standard deduction−$15,000
Taxable income$65,000
All income lands in the 22% bracket22%
Employer withheld from bonus (flat 22%)$1,760
Actual tax owed on bonus~$1,760 ✓
Sofia's withholding was exactly right. No refund, no surprise bill. The 22% flat rate happened to match her marginal rate perfectly.
If Sofia earned $42,000 instead, the same 22% withholding would have been too high — her actual marginal rate on the bonus would be around 14–16%. She'd get the excess back as a refund when she files. The math lands at filing, regardless of withholding method.
Why Your Bonus Feels More Heavily Taxed — Even When It Isn't
A few compounding factors make the withholding feel brutal even when the rate is the same:
What Disappears from a $5,000 Bonus Before It Reaches Your Account
Federal income tax (flat 22%)
$1,100
Social Security (6.2%)
$310
Medicare (1.45%)
$73
State income tax (varies — example: 5%)
$250
Net deposit~$3,267
None of these individual rates are unusual — they just all hit at once on a single payment, making the lump-sum deduction feel disproportionate.
Scenario: Large Bonus, High Earner, Real Numbers
James, a sales director in Texas (no state income tax), earns $195,000 base salary and receives a $60,000 performance bonus paid separately:
James · $195K Salary + $60K Bonus · Single · 2025 — The Underwithholding Trap
Bonus amount$60,000
Federal withholding at flat 22%$13,200
Medicare (1.45%)$870
Net bonus deposit~$45,930
Reality: bonus pushes income from $195K to $255K32–35% marginal rate
Actual federal tax on the bonus~$19,500–$20,000
⚠️ Withheld $13,200 · Owes ~$20,000 · Gap of ~$6,800–$7,000 owed at filing — plus potential underpayment penalty.
The flat 22% method significantly underwitheld for James. This is the flip side that rarely gets discussed — lower earners may be overwitheld at 22%, but higher earners in the 32–35% brackets are frequently underwitheld, and the gap can be substantial.
No action required. But if you'd rather have the money during the year, submit a revised W-4 temporarily reducing withholding on remaining regular paychecks to offset the overpayment — then reset at year-start.
⚠️ Underwitheld — you're in 32%+ bracket
Act before year-end to avoid a penalty
Option 1: Make a Q4 estimated payment to the IRS before January 15. Option 2: Submit a revised W-4 adding flat-dollar extra withholding on remaining paychecks (line 4(c)). Option 3: At minimum, set the cash aside so the April balance isn't a cash-flow surprise.
The cleanest approach: Run an estimate as soon as you know your bonus amount. Plug in your salary, the bonus, your standard deduction, and filing status. Calculate your actual tax liability versus year-to-date withholding. The gap tells you exactly how much to cover before year-end.
Both are treated as supplemental wages under the same IRS rules.
Signing bonuses are fully taxable as ordinary income in the year received. If you receive a signing bonus and repay it within the same tax year, you report the net amount. Repayment in a different tax year is more complicated — you may be able to claim a deduction or credit for the repaid amount in the year of repayment.
Severance pay is also fully taxable as ordinary income, subject to the same withholding rules. It's not treated differently just because the employment relationship is ending.
Frequently Asked Questions
No — your bonus is ordinary income and ultimately taxed at your marginal income tax rate, the same as your salary. The withholding can look higher because employers use a flat 22% supplemental rate or the aggregate method, both of which can diverge from your real liability. The difference is settled when you file.
The IRS allows employers to use a flat 22% withholding rate on supplemental wages as a simplification — it doesn't account for your actual tax bracket. If your marginal rate is below 22%, you've been overwitheld and will receive the excess back as part of your refund when you file.
Not directly for the bonus itself — the withholding method is determined by how the employer processes payroll. But you can submit a revised W-4 to reduce withholding on your regular paychecks before or after the bonus to compensate, or simply receive the refund at filing.
It can. A large bonus increases your AGI, which may phase out eligibility for certain credits or deductions, and can trigger the Additional Medicare Tax if total income crosses $200,000 (single) or $250,000 (MFJ). Running a full estimate after you know your bonus is the only way to see all downstream effects.
Only the portion above the bracket threshold is taxed at the higher rate — not your entire income or the entire bonus. If your taxable income sits at $95,000 and a $10,000 bonus pushes you to $105,000, only the ~$4,500 above the 22%/24% boundary gets taxed at 24%. The rest remains at 22%.
The Withholding Is Temporary. Your Real Tax Bill Is What Matters.
Enter your salary, bonus, and filing status above — see your real estimated tax liability, how it compares to what was withheld, and whether to expect a refund or a balance due.