Payroll Tax Calculator
TaxCalculate 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.
Reviewed by the thecalcu.com team · Last updated July 25, 2026
Net Take-Home Pay
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.
Why Use a Payroll Tax Calculator?
Verify your paystub instantly. Payroll errors happen, incorrect filing status entered by HR, a miscoded deduction, or a system error after a W-4 update can quietly under- or over-withhold for months. Enter your current gross pay and deductions and compare the calculator's outputs against your most recent pay stub. Any significant discrepancy in federal income tax, Social Security, or Medicare lines is worth flagging with your employer before it compounds across a full pay cycle.
Model the real net-pay impact of a salary negotiation. A $5,000 annual raise does not add $5,000 to take-home pay. After Social Security, Medicare, and federal income tax at your marginal rate, the after-tax value depends on your current bracket and deduction elections. The calculator shows the exact net-pay increase from a proposed compensation change, providing accurate context when evaluating offers.
See the paycheck effect of a 401(k) increase before committing. Increasing a traditional 401(k) contribution reduces federal income tax withholding but not FICA. For a 22% bracket employee, a $200/period contribution increase reduces take-home pay by roughly $156, not $200, because $44 is recouped from reduced federal withholding. The calculator makes this offset visible before you change your contribution rate.
Anticipate the Social Security wage base mid-year increase. If your annual salary exceeds approximately $130,000, your Social Security withholding stops partway through the year, producing a noticeable paycheck increase. The calculator helps you anticipate when this happens and by how much your net pay will increase, useful for planning one-time expenses or adjusting automatic savings transfers.
Who Should Use This Calculator?
Employees evaluating a job offer who want to translate gross salary into a realistic take-home figure before accepting. The calculator covers the main variables, pay frequency, filing status, and pre-tax benefit elections, to give a close federal-only estimate. Remember to add any state income tax your own state imposes, which the calculator does not include.
Workers increasing retirement contributions who want to see the net paycheck impact before committing. Many employees overestimate the cost of a contribution increase, the federal income tax reduction partially offsets the larger deduction, often making the effective take-home reduction 20–30% smaller than the gross contribution amount.
Individuals who hold both W-2 employment and freelance or 1099 income need to track how much Social Security has already been withheld from W-2 wages against the $168,600 wage base. Any remaining gap before the cap is also subject to SE tax on the 1099 income. Use this calculator alongside our Self-Employment Tax Calculator to understand your combined FICA exposure.
HR coordinators and small business owners running manual sanity checks after payroll software updates, employee W-4 changes, or system migrations. While this calculator does not replace certified payroll software, it is useful for catching gross outlier errors in per-employee federal withholding.
Employees near the Social Security wage base, typically those earning above $140,000, will see Social Security withholding stop partway through the calendar year. Understanding the timing and dollar amount of that mid-year take-home increase is useful for cash flow planning.
What Insights Does the Payroll Tax Calculator Give You?
The payroll tax calculator produces six per-period figures, each answering a different question.
Net Take-Home Pay is the amount you actually receive. It is your gross pay minus pre-tax deductions, federal income tax withholding, Social Security, and Medicare. This is the primary output, use it to build a realistic monthly budget, compare job offers on an after-tax basis, or verify your direct deposit amount. If this figure differs from your actual deposit, the difference is likely state income tax, local taxes, post-tax deductions (Roth 401(k), life insurance), or wage garnishments, items outside the scope of this federal-only calculator.
Federal Income Tax is your per-period withholding based on the 2024 annualised bracket method. Multiplied by your pay frequency, this figure should closely match Box 2 on your W-2 at year-end. If it looks too high or too low, run our W-4 Withholding Calculator to confirm whether a W-4 adjustment is needed.
Social Security Tax (6.2%) is your employee share of the FICA Social Security component. This withholding stops mid-year once cumulative wages cross $168,600, at which point your take-home pay increases by this exact per-period amount for the remaining pay cycles of the year.
Medicare Tax (1.45%) applies to all wages with no cap. The figure shown includes the Additional Medicare Tax surtax (0.9%) if your annualised wages exceed $200,000 (single) or $250,000 (married filing jointly). Unlike Social Security, there is no mid-year paycheck increase for Medicare, it runs all year.
Total Withheld is the sum of pre-tax deductions, federal income tax, Social Security, and Medicare, the complete amount leaving your gross pay before you receive it. This is the number to subtract from gross pay to arrive at your net take-home.
Employer Payroll Taxes shows what your employer pays on top of your gross salary, their matching 6.2% Social Security and 1.45% Medicare per pay period. Employers do not pay the Additional Medicare Tax surcharge. This figure reveals your true total compensation cost to your employer and is useful context during salary negotiations.
How to use this Payroll Tax calculator
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.
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.
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.
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).
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.
Show formula & methodology ↓Show less ↑
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