Tax Withholding Calculator
Why Withholding Isn't Just "My Tax Bracket"
A common misconception is that your entire paycheck gets taxed at your top marginal rate. It doesn't — the U.S. federal system is progressive, meaning each slice of income is taxed at the rate for its own bracket before the next slice kicks in at a higher rate. This calculator applies the annualized-wage percentage method: it takes your pay per period, annualizes it, subtracts the standard deduction, and runs the result through the actual 2024 bracket structure.
The Formula
Annual Wages = (Gross Pay per Period − Pre-tax Deductions) × Pay Periods
Taxable Income = Annual Wages − Standard Deduction
Withholding = Progressive Tax on Taxable Income − Dependents Credit
Taxable Income = Annual Wages − Standard Deduction
Withholding = Progressive Tax on Taxable Income − Dependents Credit
2024 Federal Tax Brackets (Single Filer)
| Taxable Income | Rate |
|---|---|
| $0 – $11,600 | 10% |
| $11,600 – $47,150 | 12% |
| $47,150 – $100,525 | 22% |
| $100,525 – $191,950 | 24% |
| $191,950 – $243,725 | 32% |
| $243,725 – $609,350 | 35% |
| $609,350 and above | 37% |
2024 standard deduction: $14,600 (single), $29,200 (married filing jointly), $21,900 (head of household).
A Worked Example
| Biweekly Gross Pay | Annualized Taxable Income | Withheld per Paycheck |
|---|---|---|
| $1,500 | $24,400 | $103.69 |
| $2,500 | $50,400 | $236.19 |
| $4,000 | $89,400 | $566.19 |
| $6,000 | $141,400 | $1,037.63 |
Where This Matters
- Filling out a new W-4 — estimating withholding before adjusting allowances or additional withholding amounts on a new job.
- Avoiding a surprise tax bill — comparing estimated annual withholding against expected total tax liability to see if you're on track.
- Understanding a raise's real impact — seeing how much of a raise crosses into a higher bracket versus stays in the current one.
Note: This is a simplified federal-only estimate using the annualized wage percentage method. It does not include state withholding, FICA, or the exact IRS Publication 15-T tables — treat it as an approximation, not payroll guidance.
How to Use This Calculator
- Enter your gross pay per period.
- Select your pay frequency.
- Select your filing status — Single, Married Filing Jointly, or Head of Household.
- Enter pre-tax deductions per period, if any.
- Enter an annual dependents tax credit, if applicable.
- Select Calculate to see estimated withholding per paycheck.
Related Calculations
See full take-home pay including FICA with the Paycheck Calculator, or break out every payroll deduction with the Payroll Deduction Calculator.