Bonus Tax Rate: Why Your Bonus Paycheck Looks Overtaxed

The bonus email arrives with a number in it. Then the deposit arrives with a different, smaller number, and the pay stub shows a slice taken out that looks far larger than anything your regular paycheck loses. The natural conclusion is that bonuses carry their own, harsher tax rate.

They do not. There is no bonus tax rate. There is a bonus withholding rate, which is a different thing, and for most people it is wrong. The useful part is that it is wrong in a direction you can predict from your tax bracket, which tells you before you file whether that bonus check is setting you up for a refund or a bill.

Quick answer

The IRS classifies bonuses as supplemental wages. Most employers withhold federal income tax from them at a flat 22 percent, and the rate becomes a mandatory 37 percent on supplemental wages above $1 million in a calendar year. Social Security, Medicare, and any state or local tax come out on top of that.

On your tax return, the bonus is simply more wages, taxed at the same rates as your salary. If your top federal bracket is below 22 percent, too much was withheld and the difference comes back to you. If your top bracket is above 22 percent, too little was withheld and you owe the difference.

Withholding is a prepayment, not the tax

Your bonus lands in Box 1 of your W-2 alongside your salary, with no separate line and no separate rate. Form 1040 has nowhere to report a bonus as anything other than wages. When you file, the IRS adds up all your income, applies the same brackets to all of it, and compares the result with everything withheld during the year.

Withholding is just your employer’s estimate, sent ahead on your behalf. The estimate on a regular paycheck is tuned to your W-4. The estimate on a bonus usually is not tuned to anything about you at all, which is why it misses.

The two ways payroll withholds on a bonus

Federal rules give employers two methods for supplemental wages of $1 million or less. Your employer chooses, not you.

The flat rate method. Payroll withholds exactly 22 percent of the bonus for federal income tax. Two conditions apply: the bonus has to be identified separately from your regular wages, either as its own check or its own line on the stub, and income tax must have been withheld from your regular wages this year or last. Under this method your W-4 is ignored completely. Your filing status, dependents, and any extra withholding you requested make no difference to the bonus.

The aggregate method. Payroll adds the bonus to your regular wages for the pay period, figures withholding on the total as if it were one normal paycheck, then subtracts what was already withheld from the regular portion. The rest comes out of the bonus. Employers must use this method if no income tax was withheld from your regular wages, and a bonus paid inside a regular paycheck without being separated out is treated the same way, as one combined payment.

Above $1 million. Once your supplemental wages from one employer pass $1 million in a calendar year, every further dollar is withheld at 37 percent. There is no choice of method and the W-4 plays no part.

Why the aggregate method can look brutal

The aggregate method is responsible for most of the truly alarming bonus stubs, and the reason is how withholding tables work. Payroll systems figure withholding by annualizing each paycheck: they multiply it by the number of pay periods in a year and ask what tax that annual salary would owe.

Take someone paid $2,000 every two weeks, which works out to $52,000 a year. A $5,000 bonus lands in the same check, so payroll sees $7,000 for a two week period. Multiplied by 26 pay periods, that check looks like a $182,000 salary, and it is withheld as though you earn that much all year. The bonus portion gets taxed at bracket rates you will never actually reach, and the effective withholding on it can run far above 22 percent.

None of that is lost. Your return looks at your real annual income, so the excess comes back at filing. The same annualizing effect is why a single week of heavy overtime can make a paycheck look overtaxed, which we cover in how overtime is actually calculated.

Which way 22 percent misses, by bracket

Under the flat rate method, the question is simple: is your top federal bracket above or below 22 percent? Here is a $10,000 bonus under each federal rate, assuming the whole bonus falls inside one bracket.

Your top federal bracket	Federal tax the bonus actually adds	Withheld at 22%	What happens at filing
10%	$1,000	$2,200	About $1,200 back
12%	$1,200	$2,200	About $1,000 back
22%	$2,200	$2,200	Roughly even
24%	$2,400	$2,200	About $200 owed
32%	$3,200	$2,200	About $1,000 owed
35%	$3,500	$2,200	About $1,300 owed
37%	$3,700	$2,200	About $1,500 owed

As a rough guide, most single filers earning under about $100,000, and most married couples earning under about $200,000 combined, sit at 22 percent or below. For them the flat rate overcollects or comes out close to right. Above those levels it starts to undercollect, and the gap widens with every bracket. A bonus that straddles two brackets lands somewhere between the rows.

Two refinements. First, your real marginal rate can sit above your bracket if the bonus reduces a credit or deduction that phases out with income. At lower incomes the earned income credit is the usual example, so a refund can be smaller than the table suggests. Our guide to marginal versus effective tax rates explains how to find the true figure. Second, the undercollection at higher incomes is the same mismatch that catches people with stock compensation, covered in why RSU withholding falls short.

To see where your own bonus lands, enter your salary plus the bonus in the PaycheckNet tax calculator and compare the result with your salary alone. The difference is what the bonus really costs you in federal tax. And a bonus never pushes your whole income into a higher bracket, only the dollars above each threshold, as Tax Brackets Are Not Buckets explains.

Everything else that comes out of a bonus

Federal income tax is only one line on a bonus stub. The rest follows its own rules.

• Social Security takes 6.2 percent until your combined wages for the year reach the annual wage base, then stops. For high earners a December bonus may be partly or entirely free of it, which is covered in why your paycheck can rise after the wage base.
• Medicare takes 1.45 percent of every dollar, with no cap. Once your wages from one employer pass $200,000 in a year, payroll must also withhold the 0.9 percent Additional Medicare Tax, and a bonus is often the payment that crosses that line.
• State income tax varies widely. Some states set their own flat supplemental rate: California withholds 10.23 percent on bonuses and 6.6 percent on other supplemental pay, and New York withholds 11.70 percent, plus 4.25 percent for New York City residents. States with a flat income tax generally withhold at that rate. States with no income tax withhold nothing, as our $150,000 in Texas breakdown shows.
• Local income taxes in places such as Philadelphia, Detroit, and most Ohio cities usually apply to bonuses too.
• Your 401(k) contribution comes out of the bonus if your plan counts bonuses as eligible pay, which most do. That lowers the deposit but not your wealth.

Add those together and a bonus check can easily lose a third or more of its gross before it reaches your account, even when the federal withholding is exactly what the law allows. If you want to match each line on the stub to its source, how to read your pay stub walks through every abbreviation.

Bonuses and the overtime deduction

The new federal deduction for overtime pay does not cover bonuses. It applies only to the premium portion of overtime that the Fair Labor Standards Act requires, the extra half in time and a half. A bonus is not that, however it is labeled.

There is one indirect link worth knowing if you are paid hourly. A nondiscretionary bonus, the kind promised in advance for production, attendance, or hitting a target, has to be folded into your regular rate for the weeks it covers. That raises the overtime premium you were owed in those weeks, and your employer has to pay the difference. That extra premium is overtime pay the law requires, so it can count toward the deduction even though the bonus itself cannot. The details are in what actually qualifies for no tax on overtime.

What you can do about it

What makes sense depends on which side of 22 percent you are on.

1. Below 22 percent, you can usually leave it alone. The excess comes back as part of your refund. If you would rather have the money during the year, you can lower withholding on your remaining regular paychecks, but estimate the full year first so you do not overshoot. Our step by step W-4 guide shows how.
2. Above 22 percent, fix it on your regular paychecks. Because the flat rate ignores your W-4, adding extra withholding will not change what comes out of the bonus. It will change your remaining paychecks, so enter the expected shortfall, spread across the pay periods left in the year, at Step 4(c). Withholding counts as paid evenly through the year no matter when it happens, so extra withholding in November and December still protects you from the underpayment penalty. An estimated tax payment works too.
3. Raise your 401(k) deferral before the payout. If your plan applies your contribution percentage to bonuses, increasing it for the bonus pay period sends more of the bonus into the plan before income tax, up to the annual limit. Social Security and Medicare still apply to those dollars. Change the election early, since payroll needs time to process it.
4. Watch the Roth catch-up threshold if you are 50 or older. Bonuses count toward the Social Security wages that decide whether your catch-up contributions must be Roth the following year. A large bonus can be what tips you over, as explained in the Roth catch-up rule.
5. Understand what timing can and cannot do. A bonus is taxed in the year it is paid, so one paid in early January belongs to the next tax year. That matters if your income will be noticeably lower or higher next year. You generally cannot push a bonus into next year yourself once it has been paid or made available to you, though some employers let you elect deferral in advance through a deferred compensation plan.

One quick check is worth doing on every bonus: look at the federal withholding line. If it is exactly 22 percent of the bonus, your employer used the flat rate and the table above tells you where you stand. If it is noticeably higher and the bonus was paid with your regular wages, the aggregate method was used, and most of the excess will come back. To see what your regular paychecks look like after any W-4 change, use the PaycheckNet payroll calculator.

Common questions

Sources and notes

Federal supplemental wage rules, including the 22 percent optional flat rate, the conditions for using it, the aggregate method, and the mandatory 37 percent rate above $1 million, follow IRS Publication 15, section 7, and Publication 15-T. The 22 and 37 percent rates are tied to the individual income tax brackets that the One Big Beautiful Bill Act made permanent. The Additional Medicare Tax withholding threshold comes from IRS guidance. California’s supplemental rates come from Revenue and Taxation Code section 18663, and New York’s from Publication NYS-50-T-NYS. The qualified overtime deduction is defined in IRS guidance implementing P.L. 119-21, and regular rate rules for nondiscretionary bonuses come from Department of Labor regulations under the Fair Labor Standards Act.

The bracket table is a simplified illustration that ignores state tax, credits, and phaseouts, all of which can change the result. State and local withholding rules change more often than federal ones, so confirm the current rate with your state if it matters to your planning. This article is for general education and is not personal tax advice.