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Payroll Tax Calculator

Tax

Calculate how much federal income tax, Social Security, and Medicare is withheld from each paycheck. See your net take-home pay by filing status in seconds.

$0$25,000
$0$5,000

Net Take-Home Pay

$2,268
Federal Income Tax
$302
Social Security Tax (6.2%)
$186
Medicare Tax (1.45%)
$44
Total Withheld
$732
Employer Payroll Taxes
$230

This calculator computes your Net Take-Home Pay, Federal Income Tax, Social Security Tax (6.2%), Medicare Tax (1.45%), Total Withheld, Employer Payroll Taxes from the values you enter.

Inputs
Gross Pay (Per Period)Pay FrequencyFiling StatusPre-Tax Deductions (401k, HSA, etc.)
Outputs
Net Take-Home PayFederal Income TaxSocial Security Tax (6.2%)Medicare Tax (1.45%)Total WithheldEmployer Payroll Taxes

What is a Payroll Tax?

A payroll tax calculator shows how much federal income tax, Social Security, and Medicare are withheld from each paycheck — and exactly what you take home after all deductions. Enter your gross pay per period, pay frequency, filing status, and any pre-tax contributions such as a 401(k) or HSA, and the calculator produces a complete per-paycheck breakdown of every federal withholding in seconds.

Three distinct taxes reduce every US employee's paycheck. Federal income tax is withheld using the IRS 2024 annualised wage bracket method: your per-period earnings are multiplied by your pay frequency to estimate annual wages, the standard deduction for your filing status is subtracted, and the resulting taxable income is run through the 2024 federal brackets. The per-period withholding is that annual figure divided back by the number of pay periods — the same calculation your employer's payroll software performs.

FICA taxes — Social Security and Medicare — are separate and fixed-rate. Social Security is withheld at 6.2% on wages up to the 2024 wage base of $168,600. Once your year-to-date earnings cross that threshold, Social Security withholding stops for the rest of the calendar year. Medicare is withheld at 1.45% on all wages with no cap; high earners above $200,000 (single) or $250,000 (married filing jointly) also pay a 0.9% Additional Medicare Tax surtax, which the employee bears alone with no employer match.

Unlike federal income tax, FICA withholding is not adjusted by your filing status, standard deduction, or W-4 elections. It applies to your full gross wages regardless of retirement contributions or other pre-tax deductions — though traditional 401(k) and HSA contributions do reduce your federal income tax base, creating a meaningful difference between FICA wages and federal income taxable wages on the same paycheck.

For a year-end view that incorporates tax credits and projects your actual refund or amount owed, use our Tax Refund Estimator. To check whether your total annual federal income tax withholding is on track relative to your actual liability, our W-4 Withholding Calculator compares projected withholding against your estimated tax and flags any per-period adjustment needed.

How to use this Payroll Tax calculator

  1. Enter your Gross Pay (Per Period) — the amount on your paycheck before any taxes or deductions are taken out. Use the per-paycheck amount, not your annual salary. If you are paid $78,000 per year bi-weekly, enter $3,000.

  2. Select your Pay Frequency — most US employees are paid bi-weekly (26 pay periods per year) or semi-monthly (24 per year). Choose the option that matches your actual pay schedule, as this directly affects how federal income tax withholding is annualised and divided back per period.

  3. Choose your Filing Status — use the status you will file with on your federal tax return. Single is the default for unmarried individuals. Married Filing Jointly applies if you are married and filing a joint return with your spouse, which generally produces lower withholding due to wider brackets and a higher standard deduction. Head of Household applies if you are unmarried and paid more than half the annual cost of maintaining a home for a qualifying person.

  4. Enter your Pre-Tax Deductions per period — the total amount deducted before taxes each pay period for traditional 401(k), 403(b), HSA, FSA, or employer-sponsored health insurance. Check your most recent pay stub's pre-tax deduction lines. These reduce federal income tax withholding but not Social Security or Medicare. Leave this at $0 if you have no pre-tax deductions or only post-tax benefit elections such as a Roth 401(k).

  5. Review your results. Compare Net Take-Home Pay against your actual direct deposit amount. The calculator covers federal withholding only — any gap is likely state income tax or other post-tax deductions. Use Federal Income Tax to verify your withholding is consistent with the Federal Income Tax Calculator's annual liability estimate, and check Employer Payroll Taxes to understand your total compensation cost from your employer's perspective.

Formula & Methodology

Three calculations run in parallel. Pre-tax deductions reduce only the federal income tax base — FICA is always computed on full gross wages.

Social Security Tax (per period):
SS = min(Gross Pay × Pay Periods, $168,600) × 6.2% ÷ Pay Periods

Medicare Tax (per period):
Medicare = Gross Pay × 1.45%
+ max(0, Gross Pay × Pay Periods − Threshold) × 0.9% ÷ Pay Periods

Where Threshold = $200,000 (Single / Head of Household) or $250,000 (Married Filing Jointly)

Federal Income Tax (Annualised Wage Bracket Method, IRS Pub 15-T 2024):
1. Annual Federal Taxable Wages = (Gross Pay − Pre-Tax Deductions) × Pay Periods
2. Annual Taxable Income = max(0, Annual Federal Taxable Wages − Standard Deduction)
3. Annual Federal Tax = computed using 2024 tax brackets for filing status
4. Per-Period Federal Tax = Annual Federal Tax ÷ Pay Periods

2024 standard deductions used in withholding computation:
- Single: $14,600
- Married Filing Jointly: $29,200
- Head of Household: $21,900

Worked example: A bi-weekly employee (26 pay periods) earns $3,000 gross per period, files Single, and contributes $200 pre-tax to a 401(k) each period.

Annual gross: $3,000 × 26 = $78,000

Social Security: min($78,000, $168,600) × 6.2% ÷ 26 = $4,836 ÷ 26 = $185.84 per period

Medicare: $78,000 × 1.45% ÷ 26 = $1,131 ÷ 26 = $43.50 per period (no Additional Medicare Tax — below $200,000)

Annual federal taxable wages: ($3,000 − $200) × 26 = $72,800
Annual taxable income: $72,800 − $14,600 (standard deduction, Single) = $58,200
Federal tax on $58,200 (Single 2024): $5,426 + ($58,200 − $47,150) × 22% = $5,426 + $2,431 = $7,857
Per-period federal income tax: $7,857 ÷ 26 = $302.19

Total withheld per period: $200 + $302.19 + $185.84 + $43.50 = $731.53
Net take-home: $3,000 − $731.53 = $2,268.47

Assumptions:
- Uses 2024 IRS Pub 15-T standard withholding (Step 2 not checked; no Step 3 credits or Step 4 additional deductions on W-4)
- Pre-tax deductions are 401(k)-style: they reduce federal income taxable wages but not Social Security or Medicare wages
- Social Security is annualised for the per-period display; in practice, withholding stops mid-year once cumulative wages hit $168,600
- State, city, and local income taxes are not included
- Additional Medicare Tax threshold is compared against annualised wages from this employer only

For a fuller definition, see our glossary entry on Payroll Tax.

Frequently Asked Questions

A payroll tax calculator shows how much federal income tax, Social Security, and Medicare are withheld from each paycheck and what you actually take home after all deductions. You enter your gross pay per period, pay frequency, filing status, and any pre-tax contributions such as a 401(k) or HSA, and the calculator produces a complete per-paycheck breakdown of every federal withholding. Federal income tax is computed using the IRS 2024 annualised wage bracket method, while Social Security and Medicare are applied as fixed percentages of gross wages.
FICA stands for the Federal Insurance Contributions Act, the law that requires employers to withhold Social Security and Medicare taxes from every employee's wages. Social Security (6.2%) funds the retirement and disability insurance programmes administered by the Social Security Administration. Medicare (1.45%) funds hospital and supplemental insurance for people aged 65 and older and certain disabled individuals. Unlike federal income tax, FICA taxes apply regardless of your filing status, standard deduction, or W-4 elections — they are a fixed percentage of gross wages up to the applicable limits.
The Social Security wage base is the annual earnings ceiling above which the 6.2% Social Security tax no longer applies. For 2024, that ceiling is $168,600. Once your year-to-date wages cross this threshold, your employer stops withholding Social Security for the remainder of the calendar year, and your take-home pay increases accordingly. For a bi-weekly employee earning $7,000 gross per period, the wage base is reached around mid-year — producing a noticeable jump in take-home pay starting with the first paycheck after the cap is crossed. Medicare has no equivalent wage base — it applies to all wages throughout the year.
Employers use the IRS Publication 15-T annualised wage bracket method. Your per-period gross pay (reduced by pre-tax deductions) is multiplied by the number of pay periods per year to estimate annual federal taxable wages. The standard deduction for your filing status is then subtracted to arrive at annual taxable income, which is run through the 2024 tax brackets. The resulting annual tax is divided back by the number of pay periods to produce per-period withholding. This is the same calculation your payroll software performs — running it yourself lets you verify the output or model scenarios before making W-4 changes.
Income taxes — federal, state, and local — are computed on taxable income after deductions and credits, and the rate varies based on how much you earn. Payroll taxes (FICA) are a flat percentage of gross wages, are not affected by deductions or filing status, and are split equally between employee and employer. Another key difference: income tax withholding is an estimate of what you will owe at filing, while FICA is a final tax — there is no year-end settlement or refund for Social Security and Medicare already withheld. Both appear on your W-2 and factor into your total cost of employment.
Employees pay half of FICA — 6.2% Social Security and 1.45% Medicare — while the employer pays the matching half. Self-employed individuals pay both halves themselves as self-employment tax: 12.4% Social Security and 2.9% Medicare on 92.35% of net self-employment income. The 92.35% factor accounts for the employer-side deduction the self-employed are allowed. Self-employed workers can deduct half their SE tax above the line, which partially offsets the higher rate. To compare your payroll situation against a freelance income scenario, use our [Self-Employment Tax Calculator](/self-employment-tax-calculator/) alongside this tool.
Filing status affects federal income tax withholding significantly but has no effect on Social Security or Medicare withholding. The annualised withholding method applies different standard deductions — $14,600 for Single, $29,200 for Married Filing Jointly, $21,900 for Head of Household — which changes the taxable income that goes through the brackets. A Married Filing Jointly employee earning the same gross pay as a Single employee will have notably lower federal income tax withheld per paycheck due to the higher standard deduction and wider brackets. FICA is computed on gross wages with no adjustment for status.
Traditional 401(k), 403(b), HSA, and employer-sponsored health insurance contributions are deducted from your wages before federal income tax is calculated, reducing your taxable wages and therefore your withholding. They do not reduce Social Security or Medicare wages — FICA applies to your full gross pay regardless. The practical effect is that a $200 per-period 401(k) increase does not reduce take-home pay by $200 — the tax savings partially offset the contribution. For a 22% bracket employee, a $200 contribution reduces federal withholding by roughly $44, so net take-home falls by approximately $156, not $200.
The Additional Medicare Tax is a 0.9% surtax on wages above $200,000 for single filers and $250,000 for married filing jointly. Only the employee pays this surcharge — there is no employer match. Your employer begins withholding the Additional Medicare Tax once your wages from that employer cross $200,000 in a calendar year, regardless of your filing status. If your combined income from multiple employers or from self-employment exceeds the applicable threshold, you may owe the surtax even if no single employer withheld it. It is reconciled on your annual Form 8959.
Yes — enter your gross pay, pay frequency, filing status, and pre-tax deductions exactly as they appear on your most recent pay stub and compare the calculator's outputs to the actual withholding lines. A close match confirms your employer's payroll software is applying the correct rates and deduction basis. Significant differences often indicate a W-4 processing error, an incorrect deduction classification, or a year-to-date Social Security cap adjustment not reflected in this single-period calculation. If withholding diverges materially from the calculator, raise it with your HR or payroll department.
Federal income tax withholding is set by the information on your W-4. To reduce withholding, you can increase pre-tax deductions (a higher 401(k) contribution reduces taxable wages), update your W-4 to claim the Child Tax Credit or other credits in Step 3, or add expected deductions in Step 4(b) if you plan to itemise. You cannot reduce FICA — Social Security and Medicare are non-negotiable unless wages fall below taxable thresholds. Use our [W-4 Withholding Calculator](/w4-withholding-calculator-us/) to determine exactly how much additional withholding or what W-4 adjustments will produce your target take-home pay.
Once your cumulative wages in a calendar year exceed the Social Security wage base of $168,600, your employer stops withholding the 6.2% Social Security tax. For the remaining pay periods of that year, your take-home pay increases by the amount that was previously going to Social Security. For a bi-weekly employee earning $180,000 per year, this cap is reached after approximately 24.5 pay periods — meaning the final two or three paychecks of the year have no Social Security withholding. Medicare withholding continues at 1.45% (plus the 0.9% surtax for income exceeding $200,000) with no annual cap.
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