Why Is My Bonus Taxed So Much? (And Do You Get It Back?)

Your bonus isn’t taxed more — it’s withheld more

Here’s the mix-up almost everyone makes: the number that gets taken out of your bonus on payday is withholding, not your actual tax bill. Withholding is the IRS’s best guess at what you’ll owe, collected upfront so you don’t face one giant bill in April. Your real tax liability is only calculated once a year, when you file your return — based on your total income for the whole year, taxed at your actual marginal rate.

Bonuses, commissions, severance pay, and other one-time payments fall into a category the IRS calls “supplemental wages,” and supplemental wages get special withholding rules that are almost always more aggressive than your normal paycheck withholding. That’s the entire reason the bonus check feels smaller than it should — not because the government taxes bonuses at some punitive rate.

The flat 22% method (and the 37% version for big bonuses)

When your employer pays a bonus as its own separate check, the simplest and most common approach is the percentage method: withhold a flat 22% for federal taxes, no matter what tax bracket you’re actually in. That rate applies to bonuses up to $1 million in a calendar year. Any amount above $1 million gets withheld at 37% — the top federal bracket — regardless of your income.

The 22% flat rate is the same for a high schooler earning minimum wage and a VP earning $300,000. If your actual marginal tax rate is lower than 22% (true for most teens and most early-career workers), the withholding overshoots your real tax bill — which sets up the refund explained below.

The aggregate method: why a bonus added to your paycheck hits even harder

Some employers don’t cut a separate bonus check — they fold the bonus into your regular paycheck for that pay period. When that happens, payroll often uses the aggregate method instead: it adds the bonus to your normal wages for that period, calculates withholding on the combined total as if you earned that much every single pay period of the year, and then subtracts what was already withheld from your regular pay.

This is usually the version that feels brutal. A $1,000 bonus added to a $1,500 paycheck makes that one paycheck look like you earn $2,500 every two weeks, or about $65,000 a year — pushing the withholding on that period into a much higher bracket than your actual annual income justifies. The money isn’t gone, it’s just over-withheld for that one period.

FICA still takes its cut either way

Regardless of which federal withholding method your employer uses, your bonus is still regular wages for Social Security and Medicare purposes. That means 6.2% comes out for Social Security (up to the annual wage base cap, which adjusts most years) and 1.45% comes out for Medicare, with no cap at all on the Medicare portion. High earners also owe an extra 0.9% Medicare surtax on wages above a set threshold, though that rarely applies to anyone early in their career. State income tax withholding, where applicable, gets tacked on separately using your state’s own supplemental wage rules.

Do you actually get the extra withholding back?

Usually, yes — if too much was withheld from your bonus relative to your real tax bracket, it comes back as part of your tax refund (or shrinks whatever you owe) when you file. Withholding from every paycheck and every bonus you received all year gets lumped together and compared against your actual tax liability on your return. Overpaid all year through 22%-flat bonus withholding while your real marginal rate is 10% or 12%? That difference comes back to you.

The flip side: if you’re a high earner whose actual marginal rate is above 22%, bonus withholding can undershoot what you owe, meaning you might owe more at tax time instead of getting it back. For most teens and students with modest total income, the first scenario is far more common.

Your checklist

1. Don’t panic at the smaller-than-expected bonus deposit — withholding is an estimate, not your final tax bill. 2. Check your pay stub to see whether the bonus was taxed as its own check (likely the flat 22% method) or folded into a regular paycheck (likely the aggregate method). 3. Remember FICA (Social Security + Medicare) comes out of a bonus just like any paycheck — that part isn’t refundable. 4. File your taxes and compare your total withholding for the year against your actual tax bracket — over-withheld bonus money usually shows up in your refund. 5. If a big bonus is coming and you’d rather not wait for a refund, some employers let you adjust your W-4 for the rest of the year to reduce future withholding.