Calculator
More options are available below. Use only what you need.
Example data table
| Pay Mode | Gross / Period | Pre-tax | State% | Local% | Total Withheld | Net Pay |
|---|---|---|---|---|---|---|
| Amount | $2,500.00 | $200.00 | 4.00% | 1.00% | $531.60 | $1,768.40 |
| Hourly | $1,587.50 | $75.00 | 0.00% | 0.00% | $254.67 | $1,257.83 |
| Amount + bonus | $6,200.00 | $500.00 | 3.50% | 0.00% | $1,420.00 | $3,860.00 |
Examples are for demonstration and will differ from real tables.
Formula used
Total withheld is the sum of enabled layers. Net pay subtracts pre-tax, total withheld, and post-tax deductions.
How to use this calculator
- Select pay frequency and rounding.
- Choose amount mode or hourly mode.
- Add any supplemental pay for the same period.
- Enter pre-tax and post-tax deductions if applicable.
- Optionally add allowances or annual reductions.
- Select a federal method: bracket or flat rate.
- Enter standard deduction and credits if you use them.
- Optionally add state, local, and contribution layers.
- Click Calculate to see totals, details, and graphs.
- Download CSV or PDF after you calculate successfully.
Tax withheld guide
1) What this calculator estimates
This tool estimates paycheck withholding by modeling wages per period, converting them to annual totals, and then spreading annual tax back across your pay frequency. It is designed for planning, budgeting, and “what‑if” testing before payday.
2) Pay frequency and annualization
Pay frequency changes the annualization factor: weekly uses 52 periods, biweekly 26, semi‑monthly 24, monthly 12, quarterly 4, and annual 1. The calculator multiplies taxable pay per period by that factor to estimate annual taxable wages.
3) Pay inputs with hourly overtime
You can enter a single gross amount, or switch to hourly mode. Hourly mode computes gross as hourly rate × regular hours plus hourly rate × overtime multiplier × overtime hours, then adds supplemental pay like bonuses or commissions for the same period.
4) Deductions and allowances
Pre‑tax deductions reduce taxable wages, while post‑tax deductions reduce only net pay. Optional allowances apply as an annual reduction spread across periods: allowance reduction per period equals count × annual allowance amount ÷ periods. This can simulate allowances or other wage reductions. Rounding can be set to cents or nearest dollar.
5) Federal method, brackets, and credits
Federal withholding can use a flat percentage or an editable progressive table. Under brackets, annual federal taxable equals max(0, annual taxable − standard deduction). The bracket tax is computed across ranges, then annual credits subtract from tax, never below zero. You can also add an extra fixed federal amount per pay period.
6) State, local, and payroll contributions
State and local layers use flat rates on taxable wages and support extra fixed withholding per period. Social and health contributions can be enabled separately with editable rates. Social may use a wage‑base cap with year‑to‑date wages, so only the remaining wages under the cap are taxed. For example, a cap of 100,000 with 99,000 YTD taxes only the next 1,000.
7) Results, charts, and exports
After you calculate, the page shows withheld per period, a stacked chart, and a doughnut chart splitting federal, state, local, social, and health. It also reports an effective rate, which is total withheld divided by taxable pay. You can download a CSV or PDF summary to save scenarios and compare runs.
FAQs
1) Is this an official tax calculator?
No. It is a planning tool that estimates withholding from your inputs. Official withholding depends on your jurisdiction’s tables, filing status, allowances, and current-year rules.
2) What is “taxable per period” here?
Taxable per period is gross pay minus pre-tax deductions and any allowance reduction. It is the base used for federal, state, local, and contribution layers.
3) How do standard deduction and credits affect results?
Standard deduction reduces annual federal taxable income. Annual credits reduce the computed annual federal tax, but not below zero. Both are applied only to the federal bracket method.
4) Can I model bonuses or commissions?
Yes. Add the amount in “Supplemental pay per period.” The calculator includes it in gross, then applies deductions and withholding layers based on your settings.
5) How does the wage-base cap work for social contributions?
If a cap is set, the calculator uses year-to-date wages to tax only the remaining portion under the cap in the current pay period. Set cap to 0 to remove the limit.
6) Why do my numbers differ from my payslip?
Payslips may include special tables, pretax rules, employer contributions, garnishments, or local credits. Verify your settings, then compare each layer (federal, state, local, social, health) against your payroll statement.