Intergtm

W-4 Withholding Estimator

Estimate your total annual federal tax liability and required withholding per paycheck.

Inputs

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Results update as you type, and the address bar keeps your numbers so the link you share reopens this exact calculation.

Total annual federal tax liability

$9,758

At your income and filing status.

Detailed results
Recommended withholding per paycheck$375
Effective tax rate16.3%
Federal income tax (after credits)$5,168
FICA (Social Security + Medicare)$4,590

What this result means

Total annual federal tax liability: $9,758.

Total federal tax liability: $9,758. Recommended withholding per paycheck: $375.

Tax Breakdown

Components of your total tax liability.

Tax Breakdown. 9 rows, first 9 shown.
ComponentAmount
Total income$60,000
Standard deduction-$15,000
Taxable income$45,000
Federal income tax (before credits)$5,168
Child tax credit-$0.00
Other dependent credit-$0.00
Federal income tax (after credits)$5,168
FICA (Social Security + Medicare)$4,590
Total tax liability$9,758

How this is calculated

Taxable income = Total income − standard deduction. Federal tax from brackets − credits. FICA = 7.65% of income. Total tax = federal + FICA. Divide by pay periods for withholding per check.

Your W-4 tells your employer how much federal income tax to withhold from each paycheck. This calculator estimates your total tax liability and divides it by pay periods to show recommended withholding per check.

Standard deduction. The IRS lets you deduct a fixed amount before calculating tax. For 2025: $15,000 (single), $30,000 (married filing jointly). This reduces your taxable income dollar-for-dollar.

Tax brackets. Your tax rate increases as income rises. 2025 rates: 10%, 12%, 22%, 24%, 32%, 35%, 37%. You don't pay 37% on all income—only on income in the 37% bracket.

Tax credits vs deductions. Deductions reduce taxable income. Credits reduce tax owed directly. A $1,000 credit saves $1,000 in tax; a $1,000 deduction saves ~22% (your marginal rate). Credits are more valuable.

FICA (Social Security + Medicare). 7.65% of gross wages: 6.2% for Social Security (capped at $168,600 in 2025 — TODO: VERIFY) and 1.45% for Medicare (no cap). Your employer matches this, but only your portion reduces your take-home.

Adjusting your W-4. Claim dependents and credits accurately. Increase withholding if you expect a big tax bill; decrease if you're getting refunds. Too much withholding = interest-free loan to the IRS.

Assumptions

  • Standard deduction for 2025: $15k (single), $30k (MFJ), $22.5k (HOH) — TODO: VERIFY annually
  • Tax brackets for 2025 — TODO: VERIFY; these adjust annually for inflation
  • Child tax credit: $2,000/child under 17 — TODO: VERIFY; phaseouts not modeled
  • No AMT (alternative minimum tax), earned income tax credit, or other advanced credits modeled
  • FICA Social Security cap not applied (7.65% on all income); actual cap is $168,600 in 2025 — TODO: VERIFY
  • No state or local income tax modeled—this is federal only

Frequently asked questions

›Should I claim 0 or 1 on my W-4?

It depends on dependents and spouse income. Use the IRS W-4 worksheet or this calculator: claim 1 per dependent, adjust for spouse income and other deductions. This calculator does the math for you.

›What's the difference between federal withholding and FICA?

Federal withholding is income tax based on your filing status and income. FICA is Social Security + Medicare, always 7.65% of gross pay. Both are deducted from your paycheck; FICA goes to different programs.

›Why do I owe taxes even though I had withholding?

Your withholding may underestimate actual liability if: (1) you have 1099 income, (2) your spouse has 1099 income, (3) you have investment income, (4) your filing status or deductions changed. Adjust your W-4 if you expect this.

›Can I claim 0 dependents to withhold more?

Yes, or claim fewer dependents than you're entitled to. Some people do this to force overwithholding as a forced savings method. It's your choice, but it's giving the IRS an interest-free loan.

›Do I need to file a new W-4 every year?

No, but you should if your life changes: marriage, divorce, kids, major income change, job change, or if you consistently get large refunds/owe taxes. The form doesn't auto-update.

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