Bonus Tax Calculator — Oregon

The number that surprises everyone

You were told $10,000. The deposit was closer to $6,500. Nothing went wrong — this is how bonus withholding works, and it is worth understanding because part of that money is usually coming back to you.

Employers have two options for withholding on a bonus. Most pick the simpler one: a flat 22% federal rate on supplemental wages, instead of running the bonus through your normal payroll tables. On top of that come Social Security, Medicare and your state.

Withholding is not the same as tax

This is the distinction that matters, and it is the reason “bonus tax rate” is a misleading phrase.

Your bonus is ordinary income. It is taxed at exactly the same rates as your salary, in the same brackets. What differs is only how much your employer holds back from the check.

So:

• If your marginal rate is 12% and 22% was withheld, you over-paid. That comes back as a refund.
• If your marginal rate is 32%, the 22% withheld was not enough, and you may owe at filing time. Plan for it rather than being surprised in April.

Timing genuinely changes the amount

Social Security is charged at 6.2% but only up to an annual wage base. Once your year-to-date wages pass that ceiling, the tax stops for the rest of the year.

Which means a bonus paid in December, after you have crossed the cap, can be several thousand dollars better off than the identical bonus paid in February. Enter your salary above and the calculator accounts for how much cap room you have left.

This also explains a common confusion: two coworkers with the same bonus and the same state can take home visibly different amounts, purely because one of them earns more and had already maxed out Social Security.

State treatment varies more than people expect

Nine states take nothing at all. A flat-tax state takes the same percentage from your bonus as from every other dollar. In a graduated state, the bonus stacks on top of your salary and is taxed at your top marginal bracket, not your average rate — so the calculator computes the tax on salary-plus-bonus and subtracts the tax on salary alone, which is the bonus’s true cost.

What this leaves out

• Local income taxes, which cities like New York City and Philadelphia charge on top of the state.
• 401(k) deferrals from the bonus, if your plan allows them — a common way to reduce the income-tax hit.
• The aggregate withholding method, which some employers use instead of the flat rate. If your bonus was rolled into a regular paycheck, your withholding may differ from this estimate.

For the picture on your regular paychecks, use the take-home pay calculator. And before the bonus lands, check whether deferring part of it into your 401(k) would capture more employer match.