Paycheck BookU.S. take-home estimates

One extra check

Bonus Tax Calculator

Enter a bonus amount and, if you have it, the wages already paid this year. The calculator applies 2026 FICA to this bonus and then multiplies the federal and state percentages you enter. It does not run the IRS aggregate method.

This bonus check

Start with a sample if you want to see a result first. You can change every number afterward. The estimate updates as you type.

Enter the gross bonus before taxes.
Wages already paid this calendar year, not including this bonus. Leave empty to treat year-to-date as $0.00.
The calculator multiplies this percentage. Enter 22 if you want the common supplemental-wage figure. It is not applied automatically.
A 401(k)-style amount on this bonus. It lowers the income-tax base and does not lower FICA here.

Estimated bonus remaining

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    How the calculator figures the estimate

    Social Security is 6.2% of the part of this bonus that still fits under the $184,500 wage base after year-to-date wages. Medicare is 1.45% of the full bonus. Additional Medicare Tax of 0.9% applies only to the slice of year-to-date wages plus this bonus that crosses $200,000.

    Federal and state income tax are the percentages you enter, multiplied by the bonus after the optional pre-tax amount. Estimated remaining pay is the bonus minus that pre-tax amount, minus FICA on the bonus, minus those income-tax figures.

    Common questions

    Should I enter 22% for federal tax?

    Many employers withhold 22% on supplemental wages. That is a common figure, not a finding that 22% is what you will owe for the year. Enter 22 if you want that withholding-style estimate. Enter the rate from a stub if you have one.

    Why ask for year-to-date wages?

    Social Security stops at the annual wage base. A late-year bonus for a high earner may owe little or no Social Security, while Medicare continues. Without year-to-date wages the calculator treats them as $0.00 and says so.

    Is this the IRS aggregate method?

    No. The aggregate method combines the bonus with a regular paycheck and uses withholding tables. This page does not do that.

    Why is this not my bonus stub?

    A stub uses the employer’s chosen method, benefits, and year-to-date totals. This estimate uses published FICA rates and the percentages you type.

    Does a 401(k) deferral from the bonus lower FICA?

    In this model it does not. The pre-tax amount lowers only the income-tax base on the bonus.