How Tax Estimates Are Calculated
Gross pay per period is annualized by multiplying by the number of pay periods. Federal income tax is then estimated using the 2025 tax brackets for your filing status. Social Security is withheld at 6.2% up to the $176,100 annual wage base; Medicare at 1.45% on all wages with an additional 0.9% above $200,000. State income tax uses the flat rate you enter. All figures are then divided back to the per-period amount.
Limitations
This is an estimate using the standard deduction. Actual withholding depends on your Form W-4 elections, pre-tax deductions, and your employer's specific payroll system. Use as a guide, not a guarantee.
Frequently Asked Questions
Take-home pay is gross pay minus all deductions. Federal income tax is withheld using the IRS percentage method based on your annualized income and filing status. Social Security is withheld at 6.2% up to the annual wage base ($176,100 in 2025). Medicare is withheld at 1.45%. State income tax uses the rate you enter.
The Social Security wage base is the maximum annual earnings subject to the 6.2% Social Security tax. For 2025, the wage base is $176,100. Earnings above this limit are not subject to Social Security withholding for the remainder of the year, though Medicare withholding (1.45%) continues on all earnings.
High earners pay an additional 0.9% Medicare tax on wages above $200,000 (single filers) or $250,000 (married filing jointly). This calculator includes the standard 1.45% Medicare withholding and applies the 0.9% surcharge at the $200,000 threshold.
This calculator does not include pre-tax deductions such as 401(k) contributions, health insurance premiums, HSA contributions, or flexible spending account contributions. These reduce your taxable income before federal and state taxes are applied. Entering your gross pay after these deductions will give a closer approximation of your net pay.
Payroll tax calculations involve many factors this calculator approximates: specific withholding allowances, year-to-date earnings affecting FICA wage bases, local city or county taxes, state-specific rules, employer-specific benefit deductions, and mid-year changes. Use this as an estimate, not an exact figure.
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