Paycheck Withholding Calculator

Taxable wages this check = gross pay − pre-tax deductions.

Federal/state withholding = taxable wages × the chosen rate.

Social Security withheld = min(gross pay, remaining wage-base room) × 6.2%.

Medicare withheld = gross pay × 1.45%, plus 0.9% on any wages that push year-to-date pay above $200,000.

Net paycheck = gross pay − pre-tax deductions − all withholding − extra withholding.

• Subtract pre-tax deductions from gross pay to get taxable wages for this check.
• Apply federal and state withholding rates to taxable wages.
• Check year-to-date wages against the Social Security wage base to see how much of this check is still taxable for Social Security.
• Add Medicare (plus the surtax if applicable) and any extra withholding you've requested.
• Subtract the total from gross pay to get your net paycheck, then multiply by paychecks per year for annual figures.

This breaks a single paycheck into each line that reduces it, so the total withheld and the net deposit can be checked against your stub line by line.

Common mistakes and assumptions

• Mixing pay frequencies — the gross figure must match the period you selected.
• Entering annual deduction amounts in per-paycheck fields.
• Expecting it to match a stub to the cent; employer withholding tables round differently.

A $3,000 biweekly paycheck with a $150 pre-tax deduction, 15%/5% withholding rates, $25 extra withholding, and no prior year-to-date wages.

1. 1Taxable wages this check = $3,000 − $150 = $2,850.
2. 2Federal withholding = $2,850 × 15% = $427.50. State withholding = $2,850 × 5% = $142.50.
3. 3Social Security = min($3,000, $184,500) × 6.2% = $186.00. Medicare = $3,000 × 1.45% = $43.50 (no surtax).
4. 4Total withheld = $427.50 + $142.50 + $186.00 + $43.50 + $25 extra = $824.50.
5. 5Net paycheck = $3,000 − $150 − $824.50 = $2,025.50.
6. 6Annualized gross = $3,000 × 26 = $78,000, and annualized withholding ≈ $21,437.

Why enter year-to-date wages?

Social Security tax only applies up to an annual wage base. If you've already earned more than that base this year — say, from a bonus or a second job — this paycheck may owe less or no Social Security tax.

What's the difference between this and the Take-Home Pay Calculator?

This tool looks at one paycheck in isolation and lets you factor in year-to-date wages and extra withholding. The Take-Home Pay Calculator starts from your full annual salary and estimates deductions across the whole year.

Why would I add extra withholding?

If your regular withholding tends to leave you owing money at tax time — common with side income, multiple jobs, or itemized deductions that changed — adding a flat extra amount per paycheck can smooth that out.

Is the annualized withholding accurate for the full year?

It's a straight-line estimate that assumes every paycheck looks like this one. In reality your Social Security withholding drops to zero once you hit the wage base, so actual annual withholding is usually a bit lower than this simple multiplication suggests.

Does this replace my W-4?

No. This is an estimate to help you understand your paycheck; it does not calculate exact IRS withholding tables or account for your filing status, dependents, or other W-4 adjustments.