The Short Answer

Your bonus isn’t taxed more — it just looks like it is because of how withholding works.

The IRS requires employers to withhold at a flat 22% federal rate on supplemental wages (including bonuses) under $1 million. If your actual marginal tax rate is 12% or 22%, the withholding matches reality. If your rate is lower (say 10%), you’ll see a “high” withholding that gets corrected at tax time.


How Bonus Withholding Works

When your employer pays your regular salary, they calculate withholding using the IRS wage bracket method — spreading your paycheck out to estimate your full annual income and withholding accordingly.

When your employer pays a bonus, they use one of two methods:

Method 1: Flat Supplemental Rate (Most Common)

The employer withholds 22% federal on the bonus amount directly, plus applicable state income tax and FICA taxes.

Example: $5,000 bonus, using flat supplemental rate

Withholding Type Rate Amount Withheld
Federal income tax 22% $1,100
Social Security 6.2% $310
Medicare 1.45% $72.50
State income tax (varies) ~5% $250
Total withheld ~$1,732
Net payout ~$3,268

So a $5,000 bonus deposits roughly $3,268 — and it feels like 65% was taken. The gap comes from FICA taxes on top of the 22% federal withholding.

Method 2: Aggregate Method (Some Employers)

The employer combines your regular paycheck and the bonus, recalculates withholding on the total, then subtracts what was already withheld. This can result in higher withholding if the combined amount pushes into a higher bracket for that pay period.


Why It Feels “Higher” Than Your Normal Tax

Three reasons bonuses feel over-taxed:

1. Lump-sum visibility When $4,000 is withheld from a $20,000 bonus, it’s visible in one line. The same $4,000 spread across 26 biweekly paychecks ($154/paycheck) is invisible.

2. FICA applies (at least up to the cap) Social Security tax (6.2%) applies to income up to $176,100 in 2026. Medicare (1.45%) applies to all income. Both apply to bonuses.

3. State taxes are also withheld Most states withhold income tax on bonuses. Combined with federal and FICA, total withholding often reaches 35-45%.


What the Numbers Actually Look Like

$10,000 bonus — withholding vs. actual tax owed

Scenario: You earn $75,000 in salary. Your marginal federal rate is 22%.

Item Withheld Actual Tax Owed
Federal (22%) $2,200 $2,200
Social Security (6.2%) $620 $620
Medicare (1.45%) $145 $145
State (varies — assume 5%) $500 $500
Total $3,465 $3,465

In this case, withholding is accurate. At 22% marginal, the flat supplemental rate matches your bracket exactly.

If you’re in the 12% bracket (income ~$47,150-$100,525 for single, but at lower end):

Item Withheld Actual Tax Owed
Federal withheld at 22% $2,200
Federal actually owed at 12% $1,200
Over-withheld $1,000

You’d receive ~$1,000 back at tax time.


The $1 Million Threshold

For bonuses exceeding $1 million in a calendar year, the rate jumps:

  • First $1,000,000: 22% withheld
  • Amount above $1 million: 37% withheld

This is sometimes cited in headlines about executives receiving $5 million bonuses losing “37% to taxes” — but the 37% only applies to the portion over $1 million, not the full amount.


How to Reduce Your Actual Tax on a Bonus

Withholding is just a prepayment. To reduce what you actually owe, you need to reduce your taxable income:

Strategy 1: Max Out 401(k) Before Year-End

The 2026 401(k) limit is $23,500 ($31,000 if 50+). If you haven’t reached the limit, increase contributions before or after your bonus to shelter income. Pre-tax 401(k) contributions reduce your federal and state taxable income dollar-for-dollar.

Example: $10,000 bonus + $6,000 additional 401(k) contribution = $6,000 less taxable income. At 22% bracket, that’s $1,320 in tax savings.

Strategy 2: Fund an HSA

2026 HSA limits: $4,300 (individual), $8,550 (family), $1,000 catchup (55+). Contributions are pre-tax and reduce taxable income.

Strategy 3: Traditional IRA

$7,000 limit ($8,000 if 50+). Deductible if you don’t have a workplace retirement plan, or if income is below the phase-out threshold.

Strategy 4: Charitable Contributions

Qualifying donations reduce taxable income if you itemize. Donating appreciated stock (no capital gains + full deduction) is especially efficient.

Strategy 5: Defer the Bonus

If your employer allows it, ask to defer your bonus to January of next year — moving the taxable event to 2027. Useful if you expect income to drop next year (parental leave, gap year, business loss year).


Summary: What You Actually Lose to Taxes

Bonus Amount Federal (22%) FICA (~7.65%) State (~5% avg) Total Withheld Net Deposit
$1,000 $220 $76.50 $50 $347 $653
$5,000 $1,100 $382 $250 $1,732 $3,268
$10,000 $2,200 $765 $500 $3,465 $6,535
$25,000 $5,500 $1,912 $1,250 $8,662 $16,338
$50,000 $11,000 $3,825 $2,500 $17,325 $32,675

Note: FICA Social Security portion caps at $176,100 in combined wages. State rates vary 0-13%.


Related: Bonus Tax Withholding | Tax Planning for a Bonus | What to Do With a Bonus | Supplemental Income Tax Rate