How to Use a Paycheck Calculator

Before You Start

Collect values for one paycheck period. A biweekly calculation should contain two weeks of hours and earnings, while a weekly calculation should contain one week.

• Hourly rate and regular hours for the paycheck
• Overtime hours and the multiplier to model
• Bonuses, commissions, tips, or other gross earnings
• Pre-tax and post-tax deduction amounts
• Federal, state and local, and payroll-tax percentages
• Comparable pay periods per year

Step 1: Enter Earnings

Enter the hourly rate, regular hours, overtime hours, and overtime multiplier. The calculator multiplies regular hours by the hourly rate and overtime hours by the hourly rate and multiplier.

Add only earnings that belong to the same paycheck in Other gross earnings. This can model a bonus, commission, or other compensation, but the calculator does not decide whether an earning changes a legal regular rate or overtime calculation.

Step 2: Enter Pre-Tax Deductions

Enter the amount that this scenario should subtract before applying the entered tax percentages. Examples may include some qualified benefit or retirement deductions, but actual tax treatment depends on the deduction and the specific tax.

The model creates one taxable-wage amount for all three entered tax rates. A real pay stub may show different wage bases for federal income tax, Social Security, Medicare, state tax, and benefits.

Step 3: Enter Withholding Rates

Enter separate percentage assumptions for federal tax, combined state and local tax, and payroll tax. Each percentage is applied to the simplified taxable-wage amount.

Federal income-tax withholding may depend on Form W-4 choices, filing status, income, credits, deductions, pay frequency, and payroll tables. State and local methods vary. Use values from a recent comparable pay stub or an official estimator when appropriate.

Step 4: Enter Post-Tax Deductions and Pay Periods

Enter deductions removed after the estimated taxes. Then enter how many comparable paychecks occur in the year. Common counts are 52 weekly, 26 biweekly, 24 semi-monthly, and 12 monthly.

The annual projection simply multiplies the modeled paycheck. Use it only when the earnings and deductions are expected to repeat.

Step 5: Read the Results

1. Gross pay: regular pay, overtime pay, and other gross earnings.
2. Taxable wages: gross pay minus the entered pre-tax deduction.
3. Tax lines: each entered rate multiplied by the simplified taxable wages.
4. Total deductions: pre-tax deduction, all calculated taxes, and post-tax deduction.
5. Net pay: gross pay minus total deductions.
6. Take-home rate: net pay as a percentage of gross pay.
7. Annual projections: gross and net pay multiplied by entered pay periods.

Worked Example: Biweekly Paycheck

The default scenario uses $25 per hour, 80 regular hours, 5 overtime hours at 1.5 times the hourly rate, $200 of other earnings, $200 of pre-tax deductions, 10% federal tax, 5% state and local tax, 7.65% payroll tax, $50 of post-tax deductions, and 26 pay periods.

These values are generated by the same production engine used on the calculator page.

Step 6: Reconcile a Pay Stub

1. Confirm regular, overtime, and other gross earnings.
2. Compare the modeled pre-tax deduction with actual deduction lines.
3. Compare each tax separately and check whether its wage base differs.
4. Confirm gross pay minus total deductions equals net pay.
5. Investigate differences caused by official tables, benefit rules, year-to-date limits, employer rounding, or jurisdiction rules.

Use the official IRS estimator for a federal withholding review and consult the relevant state or local tax authority when needed.