Salary & Tax Estimator

What the estimator actually does

The tool performs a small chain of arithmetic steps on the numbers you enter. It does not look up your employer, your filing history or any government record, and it never sends your salary anywhere.

1. Gross pay is the annual figure you enter.
2. Pre-tax deductions are subtracted first: a percentage of gross pay plus any fixed annual amount. They are capped so they cannot exceed gross pay.
3. Federal taxable income is gross pay minus pre-tax deductions minus the standard deduction for the chosen filing status.
4. Federal income tax is computed with progressive marginal brackets: each portion of taxable income is taxed at its own rate, not the whole amount at one rate.
5. FICA applies Social Security at 6.2% up to the taxable wage base, Medicare at 1.45%, and the Additional Medicare surcharge above a filing-status threshold. FICA is calculated on gross pay, not on income after retirement contributions.
6. State / local tax is a simple flat rate you supply. There are no state bracket tables, no local surtaxes and no state-specific credits in this model.
7. Take-home is gross pay minus pre-tax deductions and all estimated taxes, divided by the number of pay periods you selected.

Why the result is only an approximation

A real paycheck involves many things this model deliberately leaves out: credits, itemized deductions, dependent benefits, health and dental premiums, flexible spending accounts, commuter benefits, employer matches, bonuses, stock compensation, overtime, multiple jobs, nonresident state rules, local income taxes, and the exact withholding tables an employer uses. Tax parameters also change from year to year. For that reason the page displays an explicit parameter note next to the form and a plain-language disclaimer next to every result.

If you want a closer figure, use your most recent pay stub as a reference and compare it with the breakdown above. The difference is usually explained by one of the items in the previous paragraph.

Terms used on this page

• Gross pay — total earnings before anything is taken out.
• Net / take-home pay — what remains after taxes and deductions.
• Marginal bracket — the rate applied to the last slice of taxable income.
• Effective tax rate — total estimated tax divided by gross pay; usually lower than the top bracket.
• FICA — Social Security and Medicare taxes under the Federal Insurance Contributions Act.
• Wage base — the annual earnings cap above which Social Security tax no longer applies.

Keeping the parameters current

The bracket table, standard deduction, Social Security wage base and Medicare thresholds live in one documented block at the top of the site's calculator script. The site owner reviews them against official IRS publications at the start of each tax year. The label in the form always tells you which parameter set is in use, so a stored number is never presented as current law without context.

Frequently asked questions