US Paycheck Calculator: How Gross Pay Becomes Take-Home Pay
Learn the main parts of a US paycheck estimate, including federal income tax, Social Security, Medicare, pay frequency, and deductions.
Take-home pay is lower than gross pay because payroll can include federal income tax withholding, Social Security, Medicare, state and local taxes, and employee deductions. A paycheck calculator is useful for estimating scenarios, but an actual paycheck depends on your W-4 elections, benefits, state, pay schedule, and employer payroll rules.
Gross pay and net pay
Gross pay is what you earn before deductions. Net pay is the amount you receive after applicable withholding and deductions. The difference between them can be substantial, particularly when benefits or retirement contributions are included.
Federal income tax withholding
Federal withholding depends on filing information and the payroll assumptions used by the employer. A calculator can provide an estimate from simplified inputs, but it cannot reproduce every individual W-4 situation.
Social Security and Medicare
These payroll taxes are commonly known as FICA. Social Security applies subject to an annual wage base, while Medicare has different rules including an additional Medicare tax for certain higher-income employees.
State and local taxes
State and local payroll taxes vary considerably across the United States. Some locations have no individual state income tax while others have substantial withholding. A federal-only estimate should therefore never be treated as an exact paycheck forecast for every worker.
Why pay frequency changes the calculation
Weekly, biweekly, semimonthly, and monthly schedules divide annual compensation differently. Biweekly payroll has 26 pay periods in a typical year, while semimonthly payroll has 24. That distinction matters when converting an annual salary into per-paycheck amounts.
Frequently asked questions
Why is my actual paycheck different from a calculator?
Your W-4, benefits, retirement contributions, state taxes, local taxes, and employer payroll configuration can all change the result.
Is salary divided by 26 for biweekly pay?
For a fixed annual salary, dividing by 26 gives the gross amount for each of 26 biweekly pay periods.
Can an online calculator replace payroll advice?
No. Use it for planning and estimates. For tax decisions, consult official tax guidance or a qualified professional.