How Bonuses Are Taxed in 2026: The 22% Supplemental Wage Rule, the Aggregate Method, and Why Your Bonus Feels Over-Taxed

June 2026 Snapshot: Your Bonus Is Not "Taxed" at 22% — It Is Withheld at 22%

You earned a $5,000 bonus, but your deposit was barely $3,000. The most common reaction is "my bonus got taxed almost 40%." Here is the single most important fact in this entire guide: your bonus is not taxed at a higher rate than your salary. It is withheld differently. Under section 7 of IRS Publication 15 (Circular E), a bonus is a "supplemental wage," and employers may withhold federal income tax on it at a flat 22% — a withholding rate, not a tax rate. The actual tax is settled when you file your return, and any over-withholding comes back to you.[1]

Why does 2026 matter for a rule that sounds timeless? Because it almost changed. The 22% flat rate is tied to the 22% income-tax bracket created by the 2017 Tax Cuts and Jobs Act, which was scheduled to expire after 2025. The One Big Beautiful Bill Act (Public Law 119-21), signed July 4, 2025, made those individual rates permanent. As IRS Publication 15-B (2026) states plainly, the supplemental rate "remains 22% (37% if supplemental wages paid to an employee during the calendar year exceed $1 million)." So for 2026 the headline number is unchanged — but the confusion around it is as expensive as ever.[3, 14]

This guide walks through the two withholding methods (the flat 22% "percentage" method and the "aggregate" method that can take a much bigger bite), the mandatory 37% on bonuses over $1 million, how Social Security and Medicare still apply, and the smart moves — like steering a bonus into a 401(k) or HSA — that actually lower the tax. Before the numbers, it helps to see your own paycheck math: our salary tool models gross-to-net pay so you can frame a bonus against your real take-home.

What Counts as a Bonus: "Supplemental Wages" Defined

The special 22% rule does not apply only to a year-end bonus. It applies to a whole category the IRS calls supplemental wages. Per Publication 15, these are payments outside your regular pay and include bonuses, commissions, overtime pay, back pay, retroactive raises, awards and prizes, accumulated sick or vacation payouts, severance, taxable fringe benefits, and nonqualified deferred compensation. Your "regular wages" are the fixed amount you are paid each pay period; almost everything extra is supplemental.[1, 19]

Two things are true at once, and missing either one causes most of the confusion. First, a bonus is ordinary taxable income, exactly like salary — Publication 525 and Tax Topic 401 confirm it is taxed at your normal bracket rates at year-end, and it lands in Box 1 of your W-2 with the rest of your wages. Second, the withholding on it follows a separate, optional flat-rate system. The mismatch between those two — bracket-rate tax versus flat-rate withholding — is the entire reason a bonus can look "over-taxed."[5, 7, 13]

A note on cousins of the bonus, so this guide stays in its lane. Tips and overtime are supplemental wages too, but for 2025–2028 they get special new deductions — see our guides to the tip deduction (§224) and the overtime deduction (§225). Bonuses and commissions get no such deduction. RSUs and stock options are also supplemental wages, but carry their own cost-basis traps — see our employee stock compensation guide. And severance and unused-PTO payouts ride the same 22%/37% rule, covered in our layoff and severance guide. This article focuses on cash bonuses and commissions.

The Two Withholding Methods: Percentage vs. Aggregate

There are exactly two ways your employer is allowed to withhold income tax on a bonus, and which one they pick explains why two coworkers with identical bonuses can see different deductions. The methods are set in the Treasury regulation 26 CFR §31.3402(g)-1, under the withholding authority of 26 U.S.C. §3402. They are the percentage (flat-rate) method and the aggregate method. Your employer chooses; you do not.[18, 17]

The percentage method is the simple one. If the bonus is identified separately from your regular wages, and income tax was withheld from your regular wages this year or last, the employer can withhold a flat 22% on the bonus and be done. A $10,000 bonus, $2,200 withheld for federal income tax. Most large employers default to this because payroll software handles it in one line. Publication 15 and Publication 15-A spell out these conditions.[1, 2]

The aggregate method is the one that surprises people. Here the employer lumps the bonus together with a regular paycheck, looks up the withholding on that combined amount using the Pub 15-T wage tables and your Form W-4, then subtracts what they would have withheld on the regular paycheck alone. Because the tables assume every check is that large, the math can withhold far more than 22% on the bonus portion. Smaller employers, and any employer paying a bonus inside the same check as your salary, often land here by default. The next two sections work each method with real numbers.[1]

The Flat 22% Rate, and Why It Survived Into 2026

Under the percentage method, the arithmetic is refreshingly simple: bonus × 22% = federal income tax withheld. A $1,000 bonus has $220 withheld; a $15,000 bonus has $3,300 withheld; a $50,000 bonus has $11,000 withheld. There is no W-4, no allowances, no tables — just the flat rate on the supplemental amount, exactly as Publication 15 directs. This is the method behind almost every "why is my bonus taxed at 22%?" question online.[1]

It is worth pausing on why this 22% is still here in 2026. The flat supplemental rate is pegged to the third individual tax bracket — 22% — and to the top bracket of 37%. Both were created by the 2017 tax law and set to expire after 2025. The One Big Beautiful Bill Act (P.L. 119-21) made them permanent, which is why Publication 15-B says the rate "remains 22%." For 2026 the IRS confirms the 37% top bracket still begins at $640,600 for single filers and $768,700 for joint filers, per its 2026 inflation adjustments.[3, 14]

Here is the trap inside the simple math: 22% is not your tax rate. It is a one-size-fits-all withholding guess. If your real marginal rate is 10% or 12%, the 22% over-withholds and you get the difference back at filing. If your marginal rate is 32%, 35%, or 37%, a flat 22% under-withholds, and you will owe the rest in April. The flat rate is convenient for payroll, but it is only a rough stand-in for the bracket-rate tax your bonus actually faces.

Why the Aggregate Method Hits Harder

Picture a worker paid $4,000 every two weeks who gets a $10,000 bonus added to one paycheck. Under the aggregate method, payroll treats that check as $14,000. The withholding tables in Pub 15-T annualize it — as if the worker earns roughly $364,000 a year — and withhold at the high bracket rates that income implies. After subtracting the normal withholding on the $4,000, the leftover charged to the bonus can be 30% or more. The worker did nothing wrong; the table simply assumed every paycheck was a $14,000 paycheck.[1]

How do you tell which method your employer used? Look at the pay stub. If the bonus is a separate line with exactly 22% federal withholding, it was the percentage method. If the bonus was folded into your regular check and total withholding jumped more than 22% of the bonus, it was the aggregate method. Either way, remember the punchline: this is timing, not cost. Publication 505 explains that whatever was over-withheld is reconciled on your return — a bigger refund or a smaller balance due. The method changes your cash flow during the year, not your final tax.[4]

Bonuses Over $1 Million: The Mandatory 37% Rate

There is one place where the rate is not optional. Once your supplemental wages for the calendar year cross $1,000,000, the regulation in 26 CFR §31.3402(g)-1 requires withholding on the excess at the highest income-tax rate — which for 2026 is 37%. The employer has no choice and cannot use the aggregate method on the over-$1M portion. Publication 15 states the rule directly.[18, 1]

A worked example shows how the two tiers stack. Say an executive receives a $1,400,000 bonus in one year. The first $1,000,000 may be withheld at the 22% flat rate — $220,000. The remaining $400,000 is withheld at the mandatory 37% — $148,000. Total federal income tax withholding: $368,000. Per the IRS 2026 figures, 37% is also the top bracket, so a million-dollar earner is usually in that bracket anyway — meaning, unlike most workers, their withholding lands close to their true tax.[14]

Most people never see the $1M tier on a cash bonus, but high earners can hit it through stacked equity vesting (covered in our employee stock compensation guide). Whether your bonus is $2,000 or $200,000, the smartest question is not "how do I avoid the withholding?" but "what will this money do for me after tax?" A bonus invested can compound for decades — see what a few well-handled bonuses could grow into.

FICA, Medicare, and the 0.9% Surtax on Your Bonus

Income tax withholding is only half of what leaves your bonus. The other half is FICA — Social Security and Medicare — and the 22% conversation does not touch it. Under 26 U.S.C. §3121, a bonus is "wages," so the same payroll taxes that hit your salary hit your bonus. Per IRS Tax Topic 751, that is 6.2% Social Security plus 1.45% Medicare — a combined 7.65% — withheld on top of the income-tax withholding.[20, 6]

There is one quirk worth knowing. Social Security tax stops once your wages for the year reach the 2026 wage base of $184,500, confirmed by the Social Security Administration (the maximum employee Social Security tax is therefore $11,439.00). So a year-end bonus may have little or no Social Security tax if you have already crossed that cap — but Medicare's 1.45% never stops, because it has no wage cap. This is why a December bonus and a January bonus of the same size can have slightly different FICA.[24, 6]

A large bonus can also trigger the Additional Medicare Tax. Per the IRS Additional Medicare Tax Q&A, an extra 0.9% applies to wages above $200,000 (single or head of household), $250,000 (married filing jointly), or $125,000 (married filing separately). Your employer must start withholding the 0.9% the moment your year-to-date wages pass $200,000, regardless of your filing status — so a bonus that pushes you over that line will have it deducted. For the full filing-status table and how it interacts with your W-4, see our W-4 withholding guide.[9]

Withholding Is Not Your Tax Bill: The True-Up at Filing

Everything to this point leads to one liberating idea: withholding is a prepayment, not the tax itself. When you file, you add the bonus to all your other income, compute the real tax at your bracket rates, and compare it to everything withheld during the year. As Publication 505 explains, if too much was withheld, you get a refund; if too little, you pay the difference. The 22% on your bonus was just one deposit toward that final number.[4]

This is also where under-withholding can bite. If the flat 22% left you short — common for higher earners whose marginal rate is 32% to 37% — you could owe at filing and even face an underpayment penalty. Per IRS Tax Topic 306 and 26 U.S.C. §6654, you generally avoid the penalty if you owe under $1,000, or if your total payments cover at least 90% of this year's tax or 100% of last year's (rising to 110% if your prior-year AGI topped $150,000).[8, 21]

So why does a bonus feel like it lost 40%? Stack the pieces: 22% federal income-tax withholding (or more under the aggregate method), plus 7.65% FICA, plus state income tax — many states withhold their own flat supplemental rate. Add those and a take-home of roughly 60–65 cents on the dollar is normal, even though your actual federal income-tax rate on the bonus might be far lower. The "40%" is the withholding, not the tax.

State Supplemental Rates: The Other Bite

Federal rules are only part of the story. Most states that levy an income tax also have a supplemental wage withholding rate for bonuses, separate from their regular tables. Some are modest; a few are notably high — California, for example, applies an elevated flat rate to bonuses and stock options that is higher than its standard supplemental rate. Because the state rate stacks on top of the federal 22% and FICA, a single bonus can show three or four separate deductions on one pay stub.

The flip side: workers in the nine states with no state income tax — such as Texas, Florida, Washington, and Tennessee — see no state withholding on a bonus at all, leaving only the federal and FICA pieces. Wherever you live, the same principle holds: state withholding, like federal, is reconciled on your state return, so an aggressive state rate becomes a refund rather than a permanent loss.

Discretionary vs. Nondiscretionary Bonuses (and the Overtime Twist)

For income tax, every bonus is taxed the same way. But labor law draws a line that can quietly change your overtime pay. The Department of Labor's Fact Sheet #56C splits bonuses into two kinds. A discretionary bonus — one the employer decides to give, in an amount and timing it controls, with no promise in advance — is excluded from your "regular rate" of pay. A nondiscretionary bonus — a promised, formula-based, or expected payment such as a production, attendance, or retention bonus — is included in the regular rate.[22]

Why does it matter? Because the regulations in 29 CFR Part 778 require employers to fold a nondiscretionary bonus back into the regular rate, which slightly raises the overtime premium on hours you already worked. For an hourly worker, a quarterly production bonus can therefore generate a small retroactive bump in overtime pay. And note the connection to the new deduction: that higher overtime premium is what may qualify for the §225 "No Tax on Overtime" deduction — explained in our dedicated overtime guide.[23]

Smart Moves: Steering a Bonus Into a 401(k) or HSA

The honest way to pay less tax on a bonus is not a withholding trick — it is to route the money into a tax-advantaged account before it is taxed. Contributing a bonus to a traditional 401(k) reduces your taxable income dollar-for-dollar. The IRS set the 2026 employee deferral limit at $24,500, rising to $32,500 at age 50+ (an $8,000 catch-up) and $35,750 at ages 60–63 (an $11,250 super catch-up), per its 2026 retirement-plan announcement. Many plans let you set a separate, higher deferral percentage just for bonus checks.[15]

A Health Savings Account (HSA) is the other strong option if you have a qualifying high-deductible health plan. HSA contributions are deductible, grow tax-free, and come out tax-free for medical costs. For 2026, Revenue Procedure 2025-19 sets the limits at $4,400 self-only and $8,750 family, plus a $1,000 catch-up at age 55+. Funneling part of a bonus into either account turns a taxable windfall into long-term, tax-sheltered growth.[16]

One caution keeps the strategy honest: deferring a bonus into a 401(k) or HSA lowers your income tax, but it does not escape FICA. Under §3121, Social Security and Medicare are still withheld on amounts you defer through payroll. For very high earners who have maxed these accounts, an employer's nonqualified deferred compensation (NQDC) plan can push a bonus into a later year — a more advanced move worth discussing with a tax professional.[20]

Right-Sizing Your Withholding Around a Bonus

If the flat 22% leaves you under-withheld — likely if your marginal rate is 32% or higher — you can prepay the gap rather than face a surprise in April. Two tools do this. You can ask for extra withholding from each paycheck by entering an amount on line 4(c) of your Form W-4, or you can make a quarterly estimated payment with Form 1040-ES. The IRS's estimated tax guidance explains the quarterly schedule.[10, 11, 12]

The goal is to land inside the safe harbor — paying at least 90% of this year's tax or 100%/110% of last year's — so you owe little and pay no penalty, as Publication 505 describes. If you expect a regular bonus every year, the simplest fix is a standing line-4(c) amount that quietly covers the gap. For the step-by-step mechanics of filling out the W-4 itself, see our dedicated W-4 paycheck withholding guide.[4]

After Taxes: Should You Invest the Bonus or Pay Down Debt?

Once the withholding dust settles, the money that lands in your account is yours to deploy. A sensible order for most people: cover any short emergency-fund gap first, then attack high-interest debt, then invest. The reason debt often wins is simple math — paying off a credit-card balance at 22% APR is a guaranteed 22% return, which is hard to beat in the market with certainty.

If you have no expensive debt, a lump-sum bonus is an ideal seed for long-term investing, where time and compounding do the heavy lifting. Run both paths before you decide: model how fast the bonus could erase a balance with our debt-payoff calculator, and model how it might grow if invested with our compound interest calculator. The right answer is whichever gives you the higher, more certain return for your situation.

Frequently Asked Questions About Bonus Taxes

The questions below cover the points that confuse people most about bonus taxes — the 22% rate, why it can feel like 40%, the two withholding methods, refunds, the $1 million rule, FICA, the 401(k) move, and how to lower the bite.