W-2 Paycheck Calculator — Take-Home Pay Estimator

How Your W-2 Paycheck Is Calculated

Every W-2 paycheck follows the same basic pipeline. Your employer starts with your gross pay, then deducts federal income tax, FICA (Social Security and Medicare), state income tax, and any pre-tax benefits you've elected. What's left over is your net pay — the number that actually lands in your bank account. Understanding each step lets you see exactly where your money goes and, more importantly, how to keep more of it.

Let's walk through the five steps with a concrete example: a single filer earning $75,000 per year, paid biweekly, in a state with no income tax, claiming the standard deduction.

Step 1: Gross Pay

Your gross annual salary is $75,000. Paid biweekly (26 paychecks per year), each check starts at $75,000 ÷ 26 = $2,884.62. This is the starting point before anything is withheld.

Step 2: Federal Income Tax

Federal income tax is progressive — only the dollars inside each bracket are taxed at that bracket's rate. First, the $16,100 standard deduction for single filers reduces your taxable income: $75,000 − $16,100 = $58,900 of taxable income. Using the 2026 single brackets, that works out to roughly $8,400 in federal tax per year (10% on the first $12,400, 12% on the next $38,000, and 22% on the rest up to $50,400, then 22% on the balance to $58,900). Split across 26 checks, that's about $323 per paycheck.

Step 3: FICA — Social Security and Medicare

FICA is a flat 7.65% of gross wages, split between Social Security (6.2%, up to the $184,500 wage base) and Medicare (1.45%, with no cap). On $75,000: 6.2% = $4,650 and 1.45% = $1,087.50, for a total of $5,737.50 per year, or $220.67 per biweekly paycheck. FICA is charged on your gross wages, not your taxable income, and it doesn't stop when you reach the standard deduction — everyone pays it.

Step 4: State Income Tax

State taxes vary wildly. In this example we've chosen a no-income-tax state (like Texas or Florida), so state withholding is $0. If you live in a state with income tax, the calculator subtracts it here using that state's own brackets and standard deduction. A $75,000 earner in California, for example, would owe roughly $2,500–$3,000 in state tax.

Step 5: Pre-Tax Deductions and Net Pay

If you contribute to a traditional 401(k), an HSA, or pay health insurance premiums through a Section 125 plan, those are subtracted from your gross before federal and state tax are computed. With no pre-tax deductions in this example, your net pay per biweekly check is $2,884.62 − $323 − $220.67 = $2,340.95. That's roughly $60,865 take-home for the year — an effective tax rate of about 18.8% on your $75,000 salary.

What Each W-2 Box Means

Your W-2 is the tax form your employer sends you every January, and each box answers a specific question the IRS and your state ask. Here's what the most important boxes actually mean.

Box 1 — Wages, Tips, Other Compensation. This is your total taxable income for federal income tax purposes: your gross wages minus any pre-tax deductions like a 401(k), HSA, or health premiums. This is the number that flows onto your 1040.

Box 2 — Federal Income Tax Withheld. The total federal tax your employer already sent to the IRS on your behalf. Compare this to what you actually owe on your 1040 — a difference means either a refund or a bill.

Box 3 — Social Security Wages. Your wages subject to the 6.2% Social Security tax, capped at the $184,500 wage base for 2026. Unlike Box 1, this includes most pre-tax retirement contributions.

Box 4 — Social Security Tax Withheld. 6.2% of Box 3, up to a maximum of $11,439. The IRS automatically caps it at the wage base.

Box 5 — Medicare Wages and Tips. Your wages subject to Medicare tax. This is generally your full gross pay — unlike Social Security, there is no cap, and some pre-tax deductions still count here.

Box 6 — Medicare Tax Withheld. 1.45% of Box 5. If you earned over $200,000 (single), an additional 0.9% Medicare surtax also appears here.

Box 12 — Codes. This box uses letter codes to report specific amounts. The most common are D for 401(k) deferrals, W for HSA contributions, DD for the cost of employer-sponsored health coverage (informational only), and E for 403(b) deferrals. Code D shows how much of your salary went into retirement before taxes.

How Pre-Tax Deductions Change Your Take-Home

Pre-tax deductions are the single most powerful lever you have over your paycheck, because they reduce the income you're taxed on — not just the income you see. A traditional 401(k) contribution, an HSA contribution, and health insurance premiums paid through payroll all come out of your gross pay before federal and state income tax are calculated.

Here's a concrete example. Say you're in the 22% federal bracket. If you contribute $5,000 to your traditional 401(k) this year, that $5,000 is subtracted from your taxable income before tax is computed. You save $5,000 × 22% = $1,100 in federal tax. If your state also taxes at 5%, that's another $250 — a total of $1,350 in combined tax savings on a $5,000 contribution. The $5,000 still grows tax-deferred in your 401(k); you're simply not taxed on it yet.

The same logic applies to an HSA, which is even more powerful because contributions reduce FICA too, and withdrawals for medical expenses are tax-free forever. Health insurance premiums under a Section 125 plan work the same way — every dollar you pay in premiums is a dollar you never pay federal or state tax on. The trade-off, of course, is less money in today's paycheck: that $5,000 401(k) contribution costs you about $4,650 in take-home (because you save $1,100 in tax) while putting the full $5,000 to work for retirement. That's the whole game: a dollar saved in tax is a dollar you get to keep.

How Your Paycheck Is Actually Calculated

Your offer letter says one number; your bank account sees another. The gap between gross pay and take-home pay is the sum of five separate withholdings, each with its own rules: federal income tax, state income tax, Social Security, Medicare, and your own pre-tax elections. This calculator models all five using the official 2026 parameters published by the IRS and Social Security Administration.

For 2026, the numbers that matter are: federal brackets adjusted under the OBBBA inflation rules (10% bracket now reaches $12,400 for single filers), a standard deduction of $16,100 single / $32,200 married filing jointly / $24,150 head of household, a Social Security wage base of $184,500, and a 401(k) employee deferral limit of $23,500.

Federal Withholding: Progressive, Not Flat

A common misconception is that moving into a higher bracket taxes all of your income at the higher rate. In reality, only the dollars above each threshold are taxed at that bracket's rate. A single filer earning $80,000 in 2026 pays 10% on the first $12,400 of taxable income, 12% up to $50,400, and 22% only on the slice above that — after first subtracting the $16,100 standard deduction and any pre-tax contributions. That's why the effective rate shown in your results is always lower than your marginal bracket.

FICA: The Tax Everyone Pays

Social Security (6.2%) and Medicare (1.45%) come out of nearly every paycheck regardless of bracket. Two nuances our calculator handles correctly that many don't: Social Security stops once your year-to-date wages cross $184,500 — high earners see their checks jump mid-year — and an extra 0.9% Additional Medicare Tax applies to wages over $200,000. Note that 401(k) contributions do not reduce FICA wages — only Section 125 items like health insurance premiums and HSA contributions do. That distinction alone changes take-home math for anyone with employer benefits.

Pre-Tax Deductions: The Levers You Control

The fastest way to change your take-home pay without changing jobs is through pre-tax elections. A traditional 401(k) contribution reduces your federal and state taxable income dollar-for-dollar — at a combined 27% marginal rate, maxing the $23,500 limit saves over $6,300 in tax. HSA contributions ($4,400 individual / $8,750 family in 2026) are triple-advantaged: pre-tax going in, tax-free growth, tax-free out for medical costs — and unlike the 401(k), they reduce FICA wages too. Employer health premiums under a Section 125 cafeteria plan work the same way. Use the deductions panel above to model each.

State Taxes: A 0% to 12.3% Swing

Where you live changes the verdict more than almost any other input. Nine states levy no wage income tax. At the other end, California's top rate reaches 12.3%, New Jersey's 10.75%, and New York's 10.3% with progressive brackets. For a $120,000 earner, the difference between Texas and California is roughly $7,000 a year in take-home pay. This calculator includes full progressive brackets for CA, NY, and NJ, flat rates for states like Pennsylvania (3.07%) and Illinois (4.95%), and zero for the no-tax states.

Reading Your Results

The breakdown shows each withholding per pay period — weekly, biweekly, semimonthly, or monthly — alongside your annual totals, effective rate, and marginal rate. Try the what-if scenarios to see how maxing your 401(k), moving states, or adding extra W-4 withholding changes the bottom line, then save or email the result for your records.

Is my take-home pay the same as my net pay?

Yes — take-home pay, net pay, and "pay after taxes" all refer to the same thing: your gross pay minus all withholdings and deductions. It's the amount you actually receive each pay period.

Why is my federal withholding different from my tax bill?

Withholding is an estimate your employer makes based on your W-4. If it's too low, you owe at tax time; if it's too high, you get a refund. The W-4's Step 2 and Step 4(c) let you fine-tune this so your withholding matches your true tax liability.

Do pre-tax deductions affect my Social Security and Medicare taxes?

Mostly no. 401(k) and 403(b) contributions still count toward FICA wages, so you pay Social Security and Medicare on them. HSA contributions and Section 125 health premiums, however, do reduce FICA wages.

How does filing status change my paycheck?

Married filing jointly has roughly double the standard deduction and wider brackets than single, so the same gross salary withholds less federal tax — giving you a larger net check, assuming your W-4 is accurate.