About the Take-Home-Paycheck Calculator
A take-home paycheck calculator estimates the amount that lands in your bank account after federal income tax, Social Security, Medicare, state and local taxes, and pre- and post-tax deductions. The difference between gross pay and take-home ("net") pay is often 25–35% — the gap that surprises most first-time earners and anyone who just received a raise.
What's pulled from gross pay, in order
Pre-tax deductions come out first: traditional 401(k) contributions, traditional HSA contributions, certain health insurance premiums, FSA contributions. These reduce your taxable income, which is why a $5,000 traditional 401(k) contribution doesn't reduce your paycheck by the full $5,000 — it reduces it by closer to $3,500–$3,800 depending on your bracket.
Federal income tax withholding is calculated using IRS tables that map your gross pay (after pre-tax deductions), filing status, and W-4 elections to a withholding amount. Withholding is an estimate; your actual tax is reconciled when you file, which is why a tax refund is essentially a return of your own money you over-withheld.
FICA taxes — Social Security at 6.2% (up to the annual wage base) and Medicare at 1.45% (no cap, plus 0.9% additional Medicare tax on high earners) — are flat percentages, not progressive. They apply to gross wages before income tax but, importantly, traditional 401(k) contributions don't reduce FICA. Health insurance and HSA contributions through a Section 125 cafeteria plan do.
State and local income taxes vary enormously. Nine states have no state income tax (Alaska, Florida, Nevada, New Hampshire on wages, South Dakota, Tennessee, Texas, Washington, Wyoming). Others run flat (e.g., Pennsylvania, Illinois) or progressive (e.g., California, New York). Some cities — New York City, Philadelphia, several Ohio cities — add their own income tax.
Why your raise feels smaller than it sounds
Marginal tax brackets, not average tax rates, govern the take-home of additional income. A $10,000 raise for someone in the 24% federal bracket who lives in a 6% state and pays full FICA loses roughly 24% + 6% + 7.65% = 37.65% before any other deductions. Net: about $6,200 of the $10,000 lands in the bank.
The flip side: pre-tax contributions become more valuable as your bracket rises. A $1,000 401(k) contribution for someone in the 24% federal + 6% state bracket reduces takehome by only about $700, while still being a $1,000 retirement contribution. The higher your bracket, the larger this leverage.
Adjusting your W-4: refunds vs. accurate withholding
A large refund is not free money — it's a year-long, zero-interest loan you made to the U.S. Treasury. If you're consistently getting a $3,000+ refund, you can update your W-4 to capture that as $250/month in additional take-home pay. Use the IRS Tax Withholding Estimator to fine-tune.
Conversely, owing more than $1,000 at tax time can trigger an underpayment penalty. The safe harbor: withhold at least 100% of last year's tax (110% for high earners) or 90% of this year's, whichever is smaller. Use the calculator to estimate your withholding, then adjust your W-4 if needed.
How it works
- Start with gross pay. Annual salary divided by pay periods, or hourly rate × hours worked.
- Subtract pre-tax deductions. Traditional 401(k), traditional HSA, qualifying health insurance premiums, FSA contributions.
- Apply federal income tax withholding. Based on the current IRS tax tables, your filing status, and W-4 elections.
- Apply FICA. Social Security at 6.2% (subject to the annual wage base) plus Medicare at 1.45%, plus the 0.9% additional Medicare tax on wages above the threshold for your filing status.
- Apply state and local income tax. Varies by state and locality; some have no income tax, some are flat, some are progressive.
- Subtract post-tax deductions. Roth 401(k) contributions, after-tax health premiums, garnishments, union dues.
Worked examples
$80,000 salary, single, Texas (no state income tax), 6% to traditional 401(k)
Gross weekly pay ≈ $1,538. After 401(k) ($92.31) and FICA ($117.71) and federal withholding (~$170), weekly take-home ≈ $1,158. Annual take-home ≈ $60,200 of $80,000 gross — about 75%.
Same salary, single, California, no 401(k)
Gross weekly ≈ $1,538. FICA $117.71, federal ~$181, California ~$60. Weekly take-home ≈ $1,179, annual ≈ $61,300. Adding California cost about $3,100/year vs. Texas, but skipping the 401(k) means missing the deferral and any employer match.
Effect of a $5,000 raise (24% federal bracket, 6% state)
Marginal taxes: 24% federal + 6% state + 7.65% FICA = 37.65%. Net new take-home: about $3,120 of the $5,000, or $260/month. The gross-to-net haircut is what makes "the math" of small raises feel underwhelming.
Frequently asked questions
What's the difference between marginal and effective tax rate?
Your marginal rate is the rate on your last dollar earned (the bracket your top dollar falls into). Your effective rate is total tax divided by total income — always lower than marginal because lower brackets are taxed at lower rates first. Most people quote marginal when they should be quoting effective.
Why is my bonus taxed so much?
Bonuses are usually withheld at a flat 22% federal rate (the supplemental rate) plus FICA and state. That's withholding, not your final tax — at filing time, the bonus is taxed at your actual marginal rate. If your marginal rate is below 22%, you'll get the difference back.
Should I contribute to a traditional or Roth 401(k)?
Traditional reduces taxable income now; Roth grows tax-free. Higher current bracket → lean traditional; lower current bracket and decades to grow → lean Roth. Holding both for tax diversification is a reasonable hedge against future tax-law changes.
Does FICA stop at a certain income?
Social Security has an annual wage base above which the 6.2% tax stops; check the SSA for the current year's figure. Medicare has no cap and adds an extra 0.9% on wages above $200,000 (single) or $250,000 (joint). High earners often see their take-home rate jump up mid-year when they cross the Social Security wage base.
How do health insurance and HSA contributions affect my paycheck?
Pre-tax health premiums and HSA contributions through payroll reduce taxable income and FICA wages — so a $200/month HSA contribution might only reduce your take-home by $130–$150 depending on bracket. They're a rare deduction that beats both income tax and FICA.
What is the additional Medicare tax?
An extra 0.9% Medicare tax applies to wages above $200,000 for single filers and $250,000 for married filing jointly. It's withheld automatically once your year-to-date wages from a single employer cross $200,000, regardless of your filing status.
Why don't my paychecks match exactly?
Withholding is based on annualized pay-period income. A bonus, overtime, or unequal pay periods can push the calculation into a higher bracket for that period. Tax owed is based on annual income, so the differences wash out at filing time.