Paycheck tax calculator

What is a paycheck tax calculator?

A paycheck tax calculator is a free online tool that estimates how much money actually reaches your bank account on payday. Your employer does not hand you your gross salary: federal income tax, Social Security, Medicare, and usually a state income tax are withheld first, and any 401(k) or health-insurance contributions come out on top of that. This calculator works through those deductions in order and shows the take-home pay per paycheck, the annual take-home, and the effective tax rate you are really paying.

It works for both salaried and hourly workers. Choose your pay type, enter what you earn, pick how often you are paid, and the calculator converts everything to an annual figure, applies the tax rules, then divides the result back down to a single paycheck.

All federal figures used here are for tax year 2025: the income tax brackets published by the IRS in Revenue Procedure 2024-40, the standard deduction as raised for 2025 by the One Big Beautiful Bill Act, and the Social Security wage base announced by the Social Security Administration. The result is an estimate, not a payroll statement.

How does the paycheck tax calculator work?

You supply the following:

• Pay type — salary or hourly. This decides which pay fields you fill in.
• Annual salary — your gross yearly pay, shown when the pay type is salary.
• Hourly rate and hours per week — shown when the pay type is hourly. The calculator annualises them as rate × hours × 52 weeks.
• Pay frequency — weekly (52 paychecks), biweekly (26), semimonthly (24), or monthly (12).
• Filing status — single, married filing jointly, or head of household. This sets both your standard deduction and your tax brackets.
• State income tax rate — a percentage you enter yourself. It defaults to 0%.
• Pre-tax deductions per year — 401(k), health premiums, and similar contributions that come out of pay before income tax is calculated.

The calculator then works through the deductions in the order payroll does. It finds your gross annual pay, subtracts the standard deduction and your pre-tax deductions to get taxable income, runs that taxable income through the progressive federal brackets, applies FICA to your gross pay (not your taxable income), applies your state rate to gross pay, and subtracts everything to leave the annual take-home. Dividing by the number of paychecks in the year gives the amount per paycheck.

Why you enter your own state rate

There is no state table in this calculator, and that is deliberate. State income taxes are not a single number: most states run their own progressive brackets, with their own deductions, exemptions, and local add-ons, and they change every year. A built-in 50-state table would quietly go stale and give you a confidently wrong answer. Entering the rate yourself keeps the estimate honest and lets you model your real situation.

Nine states levy no tax on wage income at all — Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. If you live in one of them, leave the rate at 0%. Otherwise, enter your state’s rate, or an effective rate from last year’s return.

The 2025 standard deduction

The standard deduction is subtracted from your gross pay before federal income tax is worked out:

FICA in 2025

FICA is the pair of payroll taxes funding Social Security and Medicare, and it is charged on your gross pay, with no standard deduction:

• Social Security — 6.2% on earnings up to the 2025 wage base of $176,100. Earnings above that are not taxed for Social Security.
• Medicare — 1.45% on all earnings, with no cap.
• Additional Medicare — a further 0.9% on earnings above $200,000 (single and head of household) or $250,000 (married filing jointly).

Formulas

Gross annual pay depends on the pay type:

$$\text{Gross} = \text{Salary} \quad \text{or} \quad \text{Gross} = \text{Rate} \times \text{Hours per week} \times 52$$

Taxable income removes the standard deduction and pre-tax deductions, and never falls below zero:

$$\text{Taxable} = \max(0,\ \text{Gross} - \text{Standard deduction} - \text{Pre-tax deductions})$$

Federal income tax is progressive: each slice of taxable income is taxed at the rate of the bracket it falls in, and the slices are added up:

$$\text{Federal tax} = \sum_{i} (\text{income in bracket } i) \times (\text{rate}_i)$$

FICA is applied to gross pay, with the Social Security portion capped at the wage base:

$$\text{FICA} = 0.062 \times \min(\text{Gross},\ 176100) + 0.0145 \times \text{Gross} + 0.009 \times \max(0,\ \text{Gross} - \text{Threshold})$$

State tax uses the flat rate you enter:

$$\text{State tax} = \text{Gross} \times \frac{\text{State \%}}{100}$$

The annual take-home and the per-paycheck amount follow:

$$\text{Net annual} = \text{Gross} - \text{Federal tax} - \text{FICA} - \text{State tax} - \text{Pre-tax deductions}$$ $$\text{Take-home per paycheck} = \frac{\text{Net annual}}{\text{Paychecks per year}}$$ $$\text{Effective tax rate} = \frac{\text{Federal tax} + \text{FICA} + \text{State tax}}{\text{Gross}} \times 100$$

Worked examples

Example 1 — a $75,000 salary, single, paid biweekly, no state income tax, no pre-tax deductions.

• Gross annual pay = $75,000
• Taxable income = $75,000 − $15,750 = $59,250
• Federal income tax, bracket by bracket:
  • 10% on the first $11,925 = $1,192.50
  • 12% on the next $36,550 (from $11,925 to $48,475) = $4,386.00
  • 22% on the remaining $10,775 (from $48,475 to $59,250) = $2,370.50
  • Total federal tax = $7,949.00
• FICA = 6.2% × $75,000 + 1.45% × $75,000 = $4,650.00 + $1,087.50 = $5,737.50
• State tax = $0
• Annual take-home = $75,000 − $7,949.00 − $5,737.50 = $61,313.50
• Take-home per paycheck = $61,313.50 ÷ 26 = $2,358.21
• Effective tax rate = $13,686.50 ÷ $75,000 × 100 = 18.25%

Example 2 — $25 per hour, 40 hours a week, single, paid biweekly.

• Gross annual pay = $25 × 40 × 52 = $52,000
• Taxable income = $52,000 − $15,750 = $36,250
• Federal income tax:
  • 10% on the first $11,925 = $1,192.50
  • 12% on the remaining $24,325 = $2,919.00
  • Total federal tax = $4,111.50
• FICA = 6.2% × $52,000 + 1.45% × $52,000 = $3,224.00 + $754.00 = $3,978.00
• Annual take-home = $52,000 − $4,111.50 − $3,978.00 = $43,910.50
• Take-home per paycheck = $43,910.50 ÷ 26 = $1,688.87
• Effective tax rate = $8,089.50 ÷ $52,000 × 100 = 15.56%

Notice that the hourly worker earns 69% of the salaried worker’s gross but keeps a larger share of it: a smaller income means less of it reaches the 22% bracket, so the effective rate falls from 18.25% to 15.56%.

Practical notes

• The estimate uses the standard deduction. If you itemise, or claim credits such as the Child Tax Credit, your actual tax will be lower than shown here.
• Pre-tax deductions cut your taxable income but not your FICA in this model, and they also reduce your take-home pay directly — you are not losing that money, you are moving it into a 401(k) or a health plan.
• Social Security withholding stops for the year once your wages pass $176,100, so high earners see their paychecks grow slightly late in the year.
• Real payroll withholding is driven by the Form W-4 you filed and IRS Publication 15-T tables, so a single paycheck may differ from this annualised estimate. The two converge over a full year.
• This tool models federal and a flat state tax only. It does not cover local or city income taxes, which some jurisdictions add on top.

FAQs

Which tax year does this calculator use?

Tax year 2025. The brackets come from IRS Revenue Procedure 2024-40, the standard deduction reflects the increase enacted for 2025 by the One Big Beautiful Bill Act, and the $176,100 Social Security wage base is the Social Security Administration’s 2025 figure.

Why is there no list of states to choose from?

Because a state dropdown would be misleading. Most states use their own progressive brackets and adjust them yearly, so a hard-coded table becomes wrong the moment rules change. Entering your own rate — 0% in the nine states with no wage income tax — keeps the answer under your control and honest about what it is: an estimate.

Why is FICA charged on my gross pay and not my taxable income?

Social Security and Medicare are payroll taxes, not income taxes. They ignore the standard deduction and are levied on your wages from the first dollar, which is why the FICA figure is often larger than people expect at lower incomes.

Why does my real paycheck differ slightly from this?

Employers withhold using the W-4 you filed and the IRS wage-bracket tables, which spread the annual liability across the year and account for allowances and multiple jobs. This calculator instead computes your annual liability directly and divides it evenly. The two agree closely over a year but can differ on any single paycheck.