W-4 Withholding Calculator

What is a W-4 and how withholding works

Form W-4 tells your employer how much federal income tax to withhold from each paycheck. Your employer sends that money to the IRS on your behalf throughout the year. When you file your return, the IRS compares what was withheld against what you actually owe — too much and you get a refund, too little and you owe the balance. The goal of a well-filled W-4 is to land close to zero.

Once you know your withholding, see what actually hits your bank account with the take-home pay calculator, then check where you'll land in April with the 2025 tax refund estimator.

W-4 Steps 1–4 explained

• Step 1 — Filing status. Single, married filing jointly, or head of household. This sets your standard deduction and tax brackets.
• Step 2 — Multiple jobs. Check box 2(c) if you have two jobs or a working spouse with similar income. It bumps up withholding so you aren't underpaid across both incomes.
• Step 3 — Dependents. $2,000 per qualifying child under 17, plus $500 per other dependent. This lowers your withholding.
• Step 4 — Adjustments. 4(a) other income with no withholding, 4(b) deductions above the standard deduction, and 4(c) any extra flat dollar amount to withhold each paycheck.

How to calculate your W-4 withholding

The IRS percentage method (Publication 15-T) works from your annual figures:

Annual withholding = tax on (wages + 4a − 4b − standard deduction) − dependent credit + (4c × paychecks per year)

Divide that by the number of paychecks in your year (26 for bi-weekly, 24 for semi-monthly, 12 for monthly) to get the amount withheld each payday.

How to adjust line 4(c) to break even

If Steps 1–3 don't withhold enough — common with a side gig, two jobs, or investment income — you'll owe at tax time. Line 4(c) lets you add a flat amount to every paycheck to close that gap. The calculator above shows the exact 4(c) figure to break even. A large refund means the opposite: you're over-withholding and lending the government money interest-free, so you can lower 4(c) or claim more on Step 3.

Estimated withholding by income & filing status

Rough bi-weekly federal withholding with no dependents and no Step 4 adjustments. Your number depends on your full W-4 — enter your own details above for a personalized figure.

Want the full paycheck picture including FICA and state tax? Use the paycheck calculator by state.

W-4 withholding calculator FAQ

How do I calculate my W-4 withholding?

Start from your annual wages, add any other income (line 4a), subtract extra deductions (line 4b) and the standard deduction, then apply the federal tax brackets. Subtract your dependent credit (line 3) and add any extra withholding (line 4c). Divide the result by the number of paychecks in a year to get the amount withheld each payday. This tool does all of that for you.

How do I claim dependents on the W-4?

On Step 3, multiply the number of qualifying children under 17 by $2,000 and other dependents by $500, then add them together. That total reduces your annual withholding dollar for dollar, so more lands in each paycheck. Only one spouse should claim dependents if you're married filing jointly.

How much extra should I withhold on line 4(c)?

Line 4(c) is a flat dollar amount added to every paycheck. Use it when Steps 1–3 don't withhold enough — for example with a side income, two jobs, or to avoid a balance due. This calculator recommends the line 4(c) amount that gets you to roughly break even at filing.

Should I check the Step 2 multiple-jobs box?

Check Step 2(c) when you hold two jobs at once, or when you're married filing jointly and your spouse also works and your two incomes are similar. It increases withholding so you don't end up underpaid across both jobs. Only check it on one W-4 (the higher-paying job), not both.

What's the difference between single and married withholding?

Married filing jointly uses a larger standard deduction and wider tax brackets, so less is withheld at the same salary than for a single filer. If both spouses work, that lower withholding can leave you underpaid unless you check the Step 2 box or add extra on line 4(c).