Paycheck Tax Withholding Calculator

The Paycheck Tax Withholding Calculator estimates your federal income tax for the year and compares it to what your paychecks are withholding, so you can see whether you are heading toward a refund or a tax bill — and how to adjust your W-4.

Intermediate⏱ 2 minutesUpdated 2026-07-06

Paycheck Tax Withholding Calculator icon

Enter your details above and click “Check My Withholding” to see your results here.

How This Tool Works

Enter one paycheck: gross pay, how often you are paid, your filing status, any pre-tax deductions, and the federal income tax already withheld (from your pay stub). The tool projects your annual tax versus withholding and suggests a W-4 adjustment.

Formula & Method

Annual taxable income = gross pay − pre-tax deductions − the standard deduction for your filing status. Federal income tax is applied across the 2026 brackets, then compared to your withholding (per-check amount × pay periods) to project a refund or balance due.

Example Calculation

A single filer paid $2,500 every two weeks ($65,000/year) withholds $5,200 at $200 per check. After the $16,100 standard deduction, 2026 federal income tax on the $48,900 taxable is about $5,620 — so they are under-withholding by roughly $420 and may owe at tax time unless they add extra withholding.

Please note: This calculator provides general estimates only and is not tax advice. Tax rules vary by location and change over time — consult a qualified tax professional for guidance specific to your situation.

Frequently Asked Questions

Is this federal only?+

Yes. It estimates federal income tax withholding for tax year 2026 using the standard deduction. State and local income taxes vary too much to include and are not part of this estimate.

Is a big refund a good thing?+

A large refund means you lent the government your money interest-free all year. Many people prefer to withhold closer to their actual tax so they keep more in each paycheck — this tool shows how much to adjust.

How do I change my withholding?+

Give your employer an updated Form W-4. To withhold more, add a dollar amount on line 4(c); to withhold less, adjust your dependents or deductions. Small changes take effect on your next paycheck.

Why does it not match my pay stub exactly?+

Employers use IRS percentage-method tables that can differ slightly from a straight bracket calculation, and this tool assumes the standard deduction with no credits. Treat it as a close estimate, not an exact figure.