Bonus Tax Calculator
Take-home from a bonus, flat method vs aggregate.
Flat (supplemental) method
Federal 22% flat
- Federal: $2,200
- FICA (7.65%): $765
- State: $500
- Net: $6,535
Aggregate / true tax method
Treated as additional ordinary income
- Federal: $2,400
- FICA (7.65%): $765
- State: $500
- Net: $6,335
Likely under-withheld by $200 (refunded or owed at tax time)
IRS rules let employers withhold supplemental wages at a flat 22% (37% above $1M) or aggregate the bonus into your normal paycheck. Your actual tax owed is the same either way - the difference settles when you file.
About
Bonuses get withheld at a flat 22 percent federal (37 percent above 1M), regardless of your bracket. Most people see a bigger paycheck on a bonus than expected. This tool compares the flat-withholding amount to what you'd actually owe at tax time.
How to use
- Enter the bonus amount.
- Enter your federal marginal rate.
- Add state tax.
FAQ
Is my bonus taxed at a higher rate?+
No. It's withheld at a flat rate. Your actual tax is the same as on regular wages, settled when you file.
Why does my paycheck look so cut?+
Federal flat withholding is 22 percent. Add FICA (7.65 percent) and state tax. If your marginal rate is below 22 percent, the over-withholding comes back as a refund.