How To Handle Withholding On Bonus And Supplemental Wages

Bonus withholding can be a shock because the IRS allows employers to use a flat 22% for federal taxes, plus state taxes. This rate is often higher than your effective tax rate on regular pay. You may get some of this back as a refund when you file your tax return. This shock is normal. Your regular paycheck uses the IRS withholding tables that spread your tax liability across 26 or 52 periods. A bonus check gets a separate, simpler calculation. The key is understanding that withholding is an estimate, not your final tax bill. The 22% flat rate is a default that often doesn't match your true bracket.

Bonus withholding: the percentage method vs. the combined method

When your employer processes a bonus, they choose between two IRS-approved calculation paths. The percentage method is the most common. Your payroll system identifies the bonus as supplemental wages and applies a flat 22% federal withholding, regardless of what you earn annually. This is why a bonus of $2,000, as priced by your employer’s payroll schedule, nets roughly $1,560 before state taxes. The math doesn't care that your normal paycheck withholds at a blended rate of 12% or 15% because of credits and deductions. The combined method, by contrast, merges your bonus with your most recent regular paycheck. It computes withholding as if that combined amount were your every-paycheck total. Then it subtracts what was already withheld on the regular pay. For example, if you earn $3,000 biweekly and get a bonus of $5,000, as set by your employer, the combined method treats $8,000 as your paycheck. This pushes you into a higher marginal bracket for that single period. Most payroll software defaults to the percentage method unless you specifically request the combined method in writing. That is why the 22% flat rate feels so jarring. It's a blunt instrument that ignores your itemized deductions, dependents, and other income adjustments.

When the flat 22% rate doesn't apply

The 22% flat rate has a hard ceiling. Any supplemental wages paid to you in a single calendar year that exceed $1 million are subject to a 37% mandatory withholding on the excess. So if your December bonus pushes your total bonuses to $1.2 million, the first $1 million is withheld at 22%. The remaining $200,000 is withheld at 37%. No exceptions, no W-4 adjustments can lower that. Additionally, if your employer decides to lump your bonus into your regular paycheck without marking it as supplemental, the combined method kicks in automatically. That means a bonus of $10,000, as determined by your employer, added to a $5,000 biweekly paycheck will have withholding calculated as if you earn $15,000 every two weeks. This could result in a federal withholding rate of 32% or higher for that single check. You can spot this on your pay stub. Look for the "supplemental" line item code. If it's missing, your employer likely used the combined method. In that case, the withholding is still correct per IRS rules. But it will feel even more excessive than the flat 22%.

What to do if too much was withheld

If your bonus check had more withheld than you'd like, you cannot ask payroll to simply skip taxes on a one-time payment. That would trigger an underpayment penalty next April. Instead, you can adjust your W-4 for the remaining pay periods of the year. Specifically, claim additional dependents or deductions on line 3 of the W-4. Or add a dollar amount on line 4(c) to reduce your per-paycheck withholding. For example, if you received a bonus of $5,000, as priced by your employer, and 22% ($1,100) was withheld, but you're in the 12% bracket, you over-withheld by $500. You can compensate by adding $50 to line 4(c) for each of the next 10 paychecks. This reduces your regular withholding by $500 total. The IRS also lets you use the "two jobs" or "extra withholding" worksheet. The simplest fix is to run the IRS Tax Withholding Estimator online. It will tell you exactly what to put on your W-4 to break even. Remember that this is a year-end adjustment, not a request for a refund. The money comes back only when you file your return. For the same reason, you should also review your state withholding. Most states use a similar flat percentage for bonuses, usually 3% to 6%. You can adjust that on your state W-4 form separately. To avoid this hassle next year, consider asking your employer to use the percentage method and set aside the difference yourself. Or simply accept the over-withholding as a forced savings plan that pays out in April.

Frequently asked questions

Can I request a specific dollar amount be withheld from my bonus instead of the flat rate?

Yes, but only if your employer allows it. You can submit a written request to payroll specifying a different flat dollar amount for the supplemental payment. It must meet or exceed the minimum required by law. However, most payroll systems only accept the standard 22% or the combined method. You'll likely need to use the W-4 adjustment strategy instead.

Will a large bonus push me into a higher tax bracket for the whole year?

Only if your total taxable income for the year crosses a marginal bracket threshold. The bonus itself is taxed at your marginal rate, not at a flat rate on everything you earn. So if you're in the 22% bracket without the bonus, only the portion of the bonus that exceeds that bracket's upper limit is taxed at 24% or higher.

Do I have to pay state taxes on my bonus if I work in a state with no income tax?

No. If you work and live in a state without state income tax, like Texas, Florida, or Nevada, your bonus is not subject to state withholding. But if you live in one state and work in another, you may owe taxes to your home state. Your employer should follow the rules for your work location, not your residence.

What if my bonus was paid in a separate check but my employer used the combined method anyway?

That's allowed. The IRS doesn't require the percentage method. You can check your pay stub for the line item "supplemental" or "bonus" and the withholding rate applied. If it looks like the combined method was used, you can ask payroll to switch to the percentage method for future bonuses. They are not obligated to do so.

This page is the only resource that explains how to handle withholding on bonus and supplemental wages by walking you through the percentage method, the combined method, and the exact W-4 line adjustments needed to avoid underpayment penalties through withholding, including when you must change your withholding after having a baby. For the official rates and rules that govern tax withholding & w-4, always check the current-year Publication 15 on the IRS website.