What This Calculator Does
Your gross pay and your actual take-home pay are very different numbers. Between federal income tax, Social Security, Medicare, state income tax, and voluntary deductions, the gap can be 25% to 40% of your paycheck. Knowing exactly where your money goes helps you budget accurately, negotiate raises, and maximize tax-advantaged deductions.
This calculator estimates your net take-home pay after all federal taxes, FICA taxes, optional state income tax, and both pre-tax and post-tax deductions.
Inputs Required
- Gross Pay per Period: Your total earnings before any deductions for the selected pay period
- Pay Period: Weekly, bi-weekly, semi-monthly, monthly, or annual
- Filing Status: Single, Married Filing Jointly, or Head of Household
- Pre-Tax Deductions: Per-period contributions to 401(k), 403(b), HSA, or FSA accounts that reduce taxable income
- Post-Tax Deductions: Per-period deductions taken after taxes, such as Roth 401(k) contributions or health insurance premiums
- State Income Tax Rate: Your state's income tax rate as a flat percentage (leave at 0 for states with no income tax)
Outputs Provided
- Take-Home Pay per Period: Net paycheck after all deductions and taxes
- Federal Income Tax: Estimated federal withholding per period based on annualized income and 2024 brackets
- Social Security Tax: 6.2% on wages up to $168,600 annually
- Medicare Tax: 1.45% on all wages plus 0.9% surtax on high earners
- State Income Tax: Estimate based on the flat rate you provide
- Annual Take-Home and Gross: Full-year equivalents for budgeting
- Effective and Marginal Federal Rates: Your average and top bracket rates
How the Calculation Works
The calculator first annualizes your gross pay by multiplying it by the number of pay periods per year (52 for weekly, 26 for bi-weekly, 24 for semi-monthly, 12 for monthly). Pre-tax deductions are annualized and subtracted from gross income before the standard deduction is applied. Federal income tax is then calculated on the resulting taxable income using 2024 progressive tax brackets. All annual figures are divided back by the number of pay periods to show per-paycheck amounts.
Annual Gross = Gross Pay x Pay Periods per Year
Taxable Income = Annual Gross - Pre-Tax Deductions - Standard Deduction
Federal Tax = Progressive Brackets Applied to Taxable Income
Social Security = MIN(Annual Gross, $168,600) x 6.2%
Medicare = Annual Gross x 1.45% + Surtax
Take-Home = Gross - Federal Tax - FICA - State Tax - Post-Tax Deductions
The 2024 standard deductions are $14,600 for single filers, $29,200 for married filing jointly, and $21,900 for head of household. The Social Security wage base is $168,600. Medicare has no wage cap, and an additional 0.9% Medicare surtax applies to earnings over $200,000 for single filers and $250,000 for married filing jointly.
How to Use the Calculator
- Enter your gross pay (before any deductions) for your regular pay period
- Select your pay period frequency
- Choose your tax filing status
- Enter any pre-tax deductions per paycheck, such as 401(k) or HSA contributions
- Enter any post-tax deductions per paycheck, such as health insurance or Roth 401(k)
- Enter your state income tax rate, or leave at 0 if your state has none
- Review your take-home pay and the full per-period and annual breakdown
Example Calculation
A single filer paid bi-weekly with a gross pay of $3,500 per paycheck, $300 pre-tax 401(k) contribution, and a 5% state income tax rate:
- Annual gross: $3,500 x 26 = $91,000
- Annual pre-tax 401(k): $300 x 26 = $7,800
- Taxable income: $91,000 - $7,800 - $14,600 = $68,600
- Federal income tax: approximately $10,294 annually ($396 per paycheck)
- Social Security: $91,000 x 6.2% = $5,642 annually ($217 per paycheck)
- Medicare: $91,000 x 1.45% = $1,320 annually ($51 per paycheck)
- State tax: $91,000 x 5% = $4,550 annually ($175 per paycheck)
- Take-home: approximately $2,361 per bi-weekly paycheck
Real World Scenarios
Maximizing Pre-Tax Contributions
By increasing the 401(k) pre-tax deduction in this calculator, you can see how each additional dollar reduces your federal and state tax withholding. For a worker in the 22% federal bracket, every $100 increase in 401(k) contributions reduces take-home pay by only $72 to $75 after the tax savings, while the full $100 goes into retirement savings.
Comparing Job Offers Across States
A $100,000 job in Texas (no state income tax) produces a meaningfully different take-home than the same salary in California (up to 9.3% state rate at that income level). Use the state rate field to compare offers from different states on an after-tax basis.
Planning for a Salary Change
When receiving a raise or switching jobs, enter the new gross pay to see exactly how your take-home will change. The progressive tax system means a portion of any raise goes to taxes, but your after-tax income always increases with higher gross pay.
Why This Calculation Matters
Budgeting based on gross pay instead of take-home pay is one of the most common personal finance mistakes. Rent, groceries, car payments, and savings contributions all come out of your net pay. Knowing your actual take-home before accepting a job or signing a lease prevents financial stress and ensures you can meet your obligations.
Common Mistakes to Avoid
- Budgeting from gross pay: Your take-home can be 25% to 40% less than your gross pay. Always budget from the net figure shown by this calculator
- Forgetting post-tax deductions: Health insurance premiums, dental, vision, and Roth 401(k) contributions are taken after taxes and further reduce your paycheck. Include them in the post-tax deductions field
- Using an incorrect state tax rate: Many states have progressive rates rather than a single flat rate. Use the average effective rate for your income level in your state for a more accurate estimate
- Not updating withholding after life changes: Marriage, having a child, or a significant income change all affect your optimal W-4 withholding. Incorrect withholding leads to surprise tax bills or large refunds (which are interest-free loans to the government)
- Ignoring the Medicare surtax: High earners above $200,000 (single) or $250,000 (married) owe an additional 0.9% Medicare surtax that is often underwitheld by employers who are unaware of a spouse's income