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Tax Withholding Calculator

Enter your annual gross pay, effective tax rate and pay periods to estimate per-paycheck withholding.

How it is calculated

The tool applies one flat effective tax rate to annual gross pay: annual tax = gross × rate ÷ 100, withholding per paycheck = annual tax ÷ pay periods and take-home per paycheck = (gross − annual tax) ÷ pay periods. Gross is the yearly amount before any deduction, the rate is a percentage from 0 to 100, and pay periods is the number of paychecks per year (52 weekly, 26 biweekly, 24 semi-monthly, 12 monthly). Gross and periods must be above zero. Only this one tax is subtracted: social security or payroll contributions, health premiums, pension and other deductions are not included, so real take-home pay is lower. Real withholding rules depend on the country, bracket system and your filing choices; this is a flat-rate planning estimate, not a payroll calculation.

Worked example

Annual gross pay of 60,000, an effective tax rate of 18%, paid biweekly (26 periods). Annual tax: 60,000 × 0.18 = $10,800.00. Per paycheck: 10,800 ÷ 26 = $415.38. Take-home per paycheck: (60,000 − 10,800) ÷ 26 = 49,200 ÷ 26 = $1,892.31, before any other deductions.

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Common mistakes

  • Entering the top marginal bracket rate instead of the effective rate (total tax divided by total income); the effective rate is lower, so withholding comes out too high.
  • Entering a monthly or per-paycheck pay in the gross field; it expects the annual amount.
  • Using 12 periods for a biweekly job (26) or 24 for one paid every two weeks; some years have 27 paydays and the tool does not account for that.
  • Typing the rate as a fraction (0.18); the field takes percent, so this would be 0.18%.
  • Treating the take-home figure as the actual bank deposit when pension, insurance and other deductions are not included in it.

Sources

About this calculator

In a typical U.S.-style payroll system, employers do not hand employees their full annual salary in one lump sum — they withhold an estimated portion of income tax from each paycheck and remit it to tax authorities throughout the year, based on the employee's W-4 elections and an estimated effective tax rate. The per-paycheck amount follows simply from (annual gross pay ÷ pay periods) × effective tax rate.

The number of pay periods matters as much as the rate: the same annual salary withholds a different amount per check depending on whether it's paid weekly (52 periods), biweekly (26), semi-monthly (24) or monthly (12). This estimate is a simplified planning tool — actual withholding also depends on filing status, additional withholding elections, pre-tax deductions and bracket-based marginal rates rather than one flat effective rate — but it gives a quick sanity check on whether take-home pay lines up with expectations.

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Comments (1)

  • Editorial team

    The rate you enter should be your effective rate, meaning total tax divided by total income, not the top bracket you fall into. Using the bracket rate overstates the withholding, because lower slices of income are taxed at lower rates. A convenient source is last year's return: divide the total tax line by gross income, then enter that percentage here. Remember the take-home figure leaves out every other deduction. What effective rate do you get from your own figures?

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