How to Calculate Take-Home Pay After Federal Tax Withholding

A $72,000 salary sounds like $6,000 a month — until the first paycheck arrives and the deposit is closer to $4,957. The gap between gross pay and take-home pay is not a mistake and it is not your employer keeping money. It is federal income tax withholding plus the two payroll taxes that fund Social Security and Medicare, all taken out before the money reaches your bank account. This guide works through the exact calculation with real 2026 numbers: the current federal brackets, the standard deduction, and the FICA rates. By the end you will be able to reproduce your own paycheck to the dollar and spot it immediately when something is off.

The three federal deductions on every paycheck

Almost every American paycheck has the same three federal lines, taken in this order from gross pay:

1. Federal income tax withholding. Your employer estimates the federal income tax you will owe for the year and withholds a slice from each paycheck. The estimate comes from your Form W-4 and the IRS withholding tables in Publication 15-T. It is an estimate, not your final tax bill — the return you file settles the difference.
2. Social Security tax (OASDI). A flat 6.2% of your wages, but only on the first $184,500 of wages in 2026. Once your year-to-date earnings pass that wage base, Social Security withholding stops for the rest of the year. The most any employee pays in 2026 is $184,500 × 6.2% = $11,439.
3. Medicare tax (HI). A flat 1.45% of all wages, with no cap — it applies to every dollar you earn. On top of that, wages above $200,000 in a year ($250,000 for married couples filing jointly) pick up an Additional Medicare Tax of 0.9% on the amount above the threshold.

Social Security and Medicare together are called FICA, and for most workers they add up to a flat 7.65% of gross pay. Your employer pays a matching 7.65% on top, which never appears on your pay stub.

State income tax, health insurance premiums, 401(k) contributions, and other deductions vary by person and by state, so this guide calculates the federal take-home pay first — the part that is the same for everyone — and then shows how pre-tax deductions change it.

How federal withholding is figured

Federal income tax is marginal, which is the single most misunderstood part of the calculation. Your income is taxed in slices: each slice is taxed only at the rate for its own bracket, never at your top rate. For tax year 2026, a single filer using the standard deduction works with these figures, from IRS Revenue Procedure 2025-32:

• Standard deduction: $16,100 for single filers ($32,200 married filing jointly, $24,150 head of household). This amount comes off your income before any bracket applies.
• 10% on taxable income up to $12,400
• 12% on taxable income from $12,400 to $50,400
• 22% on taxable income from $50,400 to $105,700
• 24% on taxable income from $105,700 to $201,775
• 32%, 35%, and 37% on higher slices

The steps payroll follows, simplified to the percentage method most employers use:

Step 1 — Annualize your pay. Multiply one paycheck by the number of pay periods in the year (26 for biweekly, 24 for semimonthly, 12 for monthly).

Step 2 — Subtract the standard deduction (and any W-4 adjustments for dependents or extra withholding) to get annual taxable income.

Step 3 — Apply the brackets slice by slice to get the annual federal income tax.

Step 4 — Divide the annual tax by the number of pay periods to get the withholding per paycheck.

Then Social Security and Medicare are calculated directly on each paycheck’s gross wages, and everything is subtracted from gross pay. That is the whole calculation. Here it is with real numbers.

Worked example: $72,000 salary, paid biweekly

Take a single filer earning $72,000 per year, paid biweekly (26 paychecks), with no pre-tax deductions and a W-4 claiming the standard deduction only.

Step 1 — Gross pay per paycheck:

• $72,000 ÷ 26 = $2,769.23

Step 2 — Annual taxable income:

• $72,000 − $16,100 standard deduction = $55,900

Step 3 — Annual federal income tax, slice by slice:

• 10% × $12,400 = $1,240.00
• 12% × ($50,400 − $12,400) = 12% × $38,000 = $4,560.00
• 22% × ($55,900 − $50,400) = 22% × $5,500 = $1,210.00
• Total annual federal income tax = $1,240 + $4,560 + $1,210 = $7,010.00

Notice the effective rate: $7,010 ÷ $72,000 = 9.7%. This worker’s top bracket is 22%, but only $5,500 of income is actually taxed at 22% — most of it is taxed at 10% and 12%. Anyone who multiplies their whole salary by their top bracket will overestimate their tax by thousands of dollars.

Step 4 — Federal withholding per paycheck:

• $7,010 ÷ 26 = $269.62

Step 5 — Payroll taxes per paycheck:

• Social Security: 6.2% × $2,769.23 = $171.69
• Medicare: 1.45% × $2,769.23 = $40.15

Step 6 — Take-home pay:

• Gross pay: $2,769.23
• Less federal withholding: −$269.62
• Less Social Security: −$171.69
• Less Medicare: −$40.15
• Take-home pay per paycheck = $2,287.77

Annualized, that is $2,287.77 × 26 = $59,482.02 of take-home pay, or about $4,957 per month. Cross-check: $72,000 − $7,010 (federal) − $4,464 (Social Security, 6.2% × $72,000) − $1,044 (Medicare, 1.45% × $72,000) = $59,482. The two routes agree, which is how you know the arithmetic is right.

Worked example: $25 per hour, 40 hours a week

Hourly workers can run the same calculation. A worker earning $25.00 per hour for 40 hours a week earns $25.00 × 40 × 52 = $52,000 per year, or $2,000.00 per biweekly paycheck.

• Taxable income: $52,000 − $16,100 = $35,900
• Federal tax: 10% × $12,400 = $1,240.00, plus 12% × ($35,900 − $12,400) = 12% × $23,500 = $2,820.00, for a total of $4,060.00 per year, or $156.15 per paycheck
• Social Security: 6.2% × $2,000.00 = $124.00
• Medicare: 1.45% × $2,000.00 = $29.00
• Take-home pay = $2,000.00 − $156.15 − $124.00 − $29.00 = $1,690.85 per paycheck, or $43,962.10 per year

If your hours vary week to week, your withholding varies with them, because payroll annualizes each paycheck as if you earned at that rate all year. A week with overtime pay pushes that check’s withholding up, which is why an overtime week sometimes looks like it was taxed more heavily than expected — the system assumed the higher pay would continue all year. To keep your own hours straight, the hours calculator or the time card calculator will total them for you before you run the withholding math.

How pre-tax deductions change the math

Not everything comes out of gross pay the same way. Contributions to a traditional 401(k) and premiums for employer health insurance are taken out before federal income tax is calculated, which lowers your taxable income — and your withholding with it.

Return to the $72,000 earner and add a 401(k) contribution of $300 per month ($3,600 per year):

• New taxable income: $72,000 − $16,100 − $3,600 = $52,300
• New annual federal tax: $1,240 + $4,560 + 22% × ($52,300 − $50,400 = $1,900) = $1,240 + $4,560 + $418 = $6,218, or $239.15 per paycheck (down from $269.62)
• The 401(k) itself costs $3,600 ÷ 26 = $138.46 per paycheck
• Social Security and Medicare are unchanged, because 401(k) contributions are still subject to FICA taxes
• New take-home pay = $2,769.23 − $138.46 − $239.15 − $171.69 − $40.15 = $2,179.78

Take-home falls by only $107.99 even though $138.46 went into retirement — the $30.47 of federal tax saved each paycheck softens the cost. That is the real price of a 401(k) contribution: less than the contribution itself, because part of it would otherwise have gone to tax. Health insurance premiums work the same way for federal income tax, and premiums paid through a cafeteria plan also escape Social Security and Medicare tax, which makes them slightly more valuable per dollar than a 401(k) contribution. For the broader picture, the hourly-to-salary conversion chart shows how hourly rates translate into annual pay before any of these deductions are applied.

Why your paycheck changes during the year

Two federal rules make take-home pay move even when your salary does not:

The Social Security wage base. Once your year-to-date wages pass $184,500, Social Security withholding stops. A worker earning $250,000 a year hits the wage base around the 20th biweekly paycheck; the last six paychecks of the year each arrive about $596 larger, because the 6.2% line simply disappears. If your December paychecks suddenly look bigger than your January ones, this is usually why.

The Additional Medicare Tax. In the other direction, once wages pass $200,000 in the year, an extra 0.9% Medicare tax applies to the amount above the threshold. For that same $250,000 earner, the last few paychecks carry the extra 0.9% on the wages above $200,000 — a small offset against the Social Security savings.

Neither change means your employer made an error. Both reset on January 1, so January paychecks return to the full FICA deduction.

Withholding is not your final tax bill

The number payroll withholds is an estimate built from your W-4. Your actual tax is settled when you file your return, and the difference comes back as a refund or is owed as a balance due. Three common reasons the estimate misses:

• Multiple jobs. Each employer withholds as if its job were your only income, which understates the total. The W-4 has a multiple-jobs worksheet for exactly this situation.
• A mid-year raise or job change. Payroll annualizes each paycheck, so a raise late in the year can over-withhold, and a job change can under-withhold.
• Credits and deductions beyond the standard deduction. Child tax credits, student loan interest, and itemized deductions all reduce your real tax below the W-4 estimate, which is why many people get refunds.

If your refund (or balance due) is large year after year, file a new W-4 with your employer — the IRS Tax Withholding Estimator will tell you the exact adjustment. A refund is not free money; it is an interest-free loan you gave the government out of your own paychecks.

Common mistakes and how to avoid them

Multiplying your whole salary by your top bracket. The 22% bracket taxes only the slice of income inside it. Your effective rate is always lower than your top bracket — 9.7% in the $72,000 example above.

Forgetting the standard deduction. Taxable income is gross pay minus $16,100 (single, 2026) before any bracket applies. Skipping it overstates the tax by roughly $1,932 to $3,542, depending on the bracket.

Confusing biweekly and semimonthly pay. Biweekly means 26 paychecks of $2,769.23 on a $72,000 salary; semimonthly means 24 paychecks of $3,000.00. The annual totals are identical, but the per-check amounts differ — and two months a year have three biweekly paychecks, which makes those months feel like a bonus.

Treating take-home pay as your salary when budgeting. Rent, loan, and savings targets should be set from take-home pay, not gross pay. A common rule is that rent should stay near 30% of take-home pay, not 30% of gross — on the $72,000 example, that is about $1,487 a month, not $1,800.

Ignoring state tax. This guide covers federal withholding only. State income tax ranges from zero in states like Texas and Florida to over 10% at the top in California, and it comes out of the same paycheck on a separate line.

How to check your answer

Take your most recent pay stub and reproduce it with the steps above: gross pay per period, minus the standard deduction annualized, brackets applied slice by slice, divided back into per-paycheck withholding, plus 6.2% Social Security and 1.45% Medicare on the gross. If your computed federal withholding is within a few dollars of the stub, payroll is doing it right — small differences come from rounding and from the exact withholding method your employer’s payroll system uses. If it is off by more than a few dollars, check first whether a pre-tax deduction (401(k), health premiums) is reducing your taxable wages, and then whether your W-4 has extra withholding or a dependents adjustment you forgot about.

Frequently asked questions

How do I calculate my take-home pay after federal tax withholding?

Start with gross pay per paycheck, subtract the standard deduction ($16,100 for a single filer in 2026) from your annual salary to get taxable income, apply the federal brackets slice by slice, divide the annual tax by your number of pay periods, then subtract that withholding plus 6.2% Social Security and 1.45% Medicare from each paycheck. For a $72,000 salary paid biweekly, that works out to $2,287.77 per paycheck.

What percentage of my paycheck goes to federal taxes?

For most workers, federal income tax withholding runs roughly 10% to 15% of gross pay, and FICA adds a flat 7.65% on wages up to $184,500. Combined, expect about 18% to 23% of gross pay to go to federal taxes, before any state tax or pre-tax deductions. The exact share rises with income because the marginal brackets climb while FICA stays flat.

Why is my take-home pay less than my salary divided by 12?

Because your salary is gross pay, and federal income tax withholding, Social Security, and Medicare are taken out first. On a $72,000 salary, those three federal deductions total $12,518 a year, leaving $59,482 — about $4,957 a month, not $6,000. State tax and pre-tax deductions like health insurance reduce it further.

Does my employer withhold the right amount of federal tax?

Usually, yes, if your W-4 is accurate and you have one job. The estimate can miss when you have multiple jobs, change jobs mid-year, or have credits and deductions beyond the standard deduction. If you consistently get a large refund or owe a large balance, update your W-4 — the IRS Tax Withholding Estimator gives the exact adjustment to enter.

Does Social Security tax stop at some point in the year?

Yes. In 2026, Social Security tax (6.2%) applies only to the first $184,500 of wages. Once your year-to-date earnings pass that amount, withholding stops for the rest of the year, so late-year paychecks are larger. Medicare tax has no cap and continues on every dollar.

How does a 401(k) contribution affect my take-home pay?

A traditional 401(k) contribution lowers the income subject to federal income tax, so your withholding falls — but your take-home pay still drops by most of the contribution. Contributing $300 a month on a $72,000 salary cuts take-home pay by about $108 per biweekly paycheck, not $138, because roughly $30 per paycheck is saved in federal tax. The contribution is still subject to Social Security and Medicare tax.