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Result

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The formula

Subtract the standard deduction and pre-tax retirement from gross, apply federal brackets, then subtract employee Social Security (wage-base capped) and Medicare. Optional flat state tax applies to wages after retirement. Monthly take-home is annual net ÷ 12.

Taxable = max(0, Gross − Std − Retirement) · Federal = Σ(Rate × Band) · FICA = SS(wage base) + Medicare · Net = Gross − Federal − FICA − State − Retirement · Monthly = Net ÷ 12

Worked example

  1. Single, $60,000 gross, 2025 standard deduction $15,000 → taxable $45,000
  2. Federal tax ≈ $5,161.50; Social Security $3,720; Medicare $870
  3. Net ≈ $50,248.50 → about $4,187 / month at ~16.3% effective tax

Result: ≈ $4,187 / month take-home with FICA on

How take-home is estimated

A paycheck stacks federal income tax withholding with FICA. This page uses IRS-style ordinary brackets plus simplified employee Social Security and Medicare shares.

Federal income tax

Progressive 2024 and 2025 brackets with an optional standard deduction. Pre-tax retirement lowers federal taxable wages in this model. Credits, AMT, and NIIT are omitted.

Social Security and Medicare

Employee OASDI is 6.2% up to the annual wage base; Medicare is 1.45% on all wages (additional Medicare tax not modeled). Traditional 401(k) deferrals usually still face FICA — this estimate applies FICA to full gross.

What we do not model

Health premiums, garnishments, local taxes, employer FICA, and year-specific credits. State tax is a flat percentage you enter — not a full state return.

Interesting facts

Gross vs take-home

Gross is before deductions. Take-home is what remains after federal tax, FICA, optional state tax, and any retirement amount you enter.

Effective rate

Total taxes ÷ gross. Usually far below your top marginal federal bracket because lower bands still apply.

Withholding ≠ final tax

Paycheck withholding is an estimate. Filing reconciles prepaid tax versus actual liability.

Biweekly ≠ twice monthly

Biweekly divides annual net by 26; semi-monthly calendars differ.

Pair with the income tax calculator

For a bracket-by-bracket federal-only view without FICA, use the income tax calculator.

Frequently asked questions

We estimate federal income tax from brackets, add employee Social Security and Medicare when enabled, subtract optional state tax and retirement, then show monthly, biweekly, weekly, and hourly nets.

It uses the same federal brackets and standard deduction options, then continues to net pay with FICA and paycheck-sized figures.

Yes when “Include Social Security and Medicare” is on — as a simplified employee FICA estimate. Turn it off for federal income tax only.

In this teaching model, FICA still applies to full gross wages. Retirement reduces federal taxable income and the cash take-home total.

Real paychecks include health premiums, local taxes, garnishments, and credits this tool skips. Treat the result as a planning ballpark.

Annual net ÷ 26 for biweekly, alongside monthly (÷12), weekly (÷52), and hourly (÷2,080) figures.

Only if you enter a flat state-tax percentage under the optional fields — not a full state return.

References

  1. IRS — Tax withholding estimator — Internal Revenue Service Official U.S. paycheck withholding tool.
  2. Social Security — contribution rates — U.S. Social Security Administration Employee/employer OASDI and HI rates.
  3. Understanding taxes — Internal Revenue Service Educational modules on how income tax works.

Regional versions

Simplified educational estimate only — not tax, payroll, or financial advice. Use IRS tools or a professional for decisions.

Last reviewed: 2026-10-11 — Reviewed by: Editorial Team

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