Tax Withholding Calculator
Flat-rate withholding sketch per paycheck and annualized. Click any i for detail.
Wages & rates
Gross wages per period ($)
i
Wages
Taxable wages on the paycheck. |
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|---|---|
Federal withholding (%)
i
Federal
Flat federal % sketch for this paycheck. |
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FICA (%)
i
FICA
Social Security + Medicare sketch; default 7.65. |
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Pay frequency
i
Freq
Periods/year: 52 / 26 / 24 / 12. |
How to use this calculator
- Enter gross wages for one paycheck.
- Set federal and FICA percentages.
- Choose pay frequency.
- Read per-check and annualized withholding.
Results explained
This flat-rate sketch multiplies wages by federal% + FICA% each period, then annualizes by pay frequency. It is not the IRS Publication 15-T percentage method or a full W-4 worksheet.
Quick reference: pay periods
per check = wages × (fed% + fica%); annual = per check × periods.
| Item | Detail |
|---|---|
| Weekly | 52 periods |
| Biweekly | 26 periods |
| Semimonthly | 24 periods |
| Monthly | 12 periods |
Educational paycheck arithmetic — not a payroll system.
How the estimate is built
perCheck = wages×(federalRate+ficaRate)/100; annual = perCheck×periods(freq).
Example scenario
$3,000 biweekly at 12% + 7.65% → about $589.50/check.
FAQ
Is this my W-4 result?
No — W-4 uses IRS tables and credits.
State tax?
Not included.
Additional withholding?
Add it into the federal % or outside this page.
SS wage base?
Cap not modeled — high earners may overstate FICA late in the year.