W-4 Paycheck Withholding Calculator
Calculate the federal income tax withheld from each paycheck for 2026 with the IRS Publication 15-T percentage method, and see how each W-4 line changes it.
W-4 Paycheck Withholding Calculator
This tool calculates federal income tax withholding only, the number your W-4 controls. It does not include Social Security, Medicare, or state tax. It uses the 2026 IRS Publication 15-T percentage-method tables and assumes a 2020-or-later Form W-4.
Paycheck and filing status
Taxable wages this pay period (W-4 line 1a), after any pre-tax deductions.
Uses the Step 2 Checkbox schedule and sets the standard-deduction adjustment to $0.
W-4 Steps 3 and 4
$2,200 per qualifying child under 17 plus $500 per other dependent (2026).
Added flat to every paycheck, on top of the calculated tax.
Pay after federal withholding is before Social Security, Medicare, and state tax. The default W-4 is the same gross, frequency, and filing status with the box unchecked and Steps 3, 4a, 4b, and 4c all zero.
How the 2026 W-4 controls your federal withholding, line by line
The Form W-4 does one job: it feeds numbers into IRS Publication 15-T so your employer knows how much federal income tax to hold back from each paycheck. Every line maps to a step in the math.
- Step 1c (filing status): picks which bracket table applies and sets the standard-deduction adjustment ($12,900 for married filing jointly, $8,600 otherwise).
- Step 2 box (multiple jobs): switches to a schedule with roughly half-width brackets and drops the standard-deduction adjustment to $0, so more is withheld.
- Step 3 (dependents): a dollar amount that is divided by your paychecks and subtracted from each check.
- Step 4(a): annual non-wage income added before tax is figured.
- Step 4(b): deductions beyond the standard deduction, which lower taxable wages.
- Step 4(c): a flat extra dollar amount added to every check.
How this W-4 paycheck withholding calculator does the math
This tool runs Publication 15-T Worksheet 1A, the percentage method that automated payroll systems use. Here is the flow: annualize your gross pay, add Step 4(a) income, subtract Step 4(b) deductions and the standard-deduction adjustment, look up the adjusted annual wage in the 2026 bracket table for your filing status and Step 2 box, divide the tentative annual tax by your number of pay periods, subtract the prorated Step 3 dependent credit (never below $0), then add Step 4(c) extra withholding.
Here is a worked example: single, biweekly, $2,500 per check, box unchecked, one child ($2,200 on Step 3). Annual wages are $65,000, minus the $8,600 adjustment gives $56,400. That lands in the 12% band, so tentative annual tax is $1,240 plus 12% of ($56,400 minus $19,900), which is $5,620, or $216.15 per check. The child credit is $2,200 divided by 26, about $84.62, leaving $131.53 withheld per check.
Federal withholding only, what is missing from your full paycheck
The W-4 controls federal income tax withholding and nothing else, so that is all this page computes. Your actual take-home also has Social Security (6.2%), Medicare (1.45%), and, in most states, state income tax withheld. For a fuller per-check take-home number, use the Salary to Paycheck Calculator. If a bonus is in play, the Bonus Tax Calculator handles supplemental withholding, and a pre-tax 401(k) contribution lowers the taxable gross you enter here.
Common W-4 mistakes and how to fix your withholding
The usual slip-ups: leaving the Step 2 box unchecked when two incomes stack (which under-withholds), treating Step 3 as a headcount instead of a dollar amount, and forgetting that Step 4(c) adds a flat amount on top of the calculated tax. If you consistently owe at filing, check the Step 2 box or add a Step 4(c) amount; if you get a large refund, you are over-withholding and can add Step 3 dependents or Step 4(b) deductions. Working back from a take-home target is easier with the Payroll Gross-Up Calculator.
To model W-4 changes across a full team, with FICA, all 50 states plus DC, and year-to-date tracking, the WorkLogs44 Payroll Calculator app runs the complete paycheck per employee.
Frequently Asked Questions
Common questions about w-4 paycheck withholding calculator
How does the W-4 change my paycheck withholding?
Your W-4 tells your employer how to run IRS Publication 15-T. Filing status and the Step 2 box pick the tax schedule, Step 3 (dependents) lowers withholding by a fixed dollar amount per check, Step 4(a) raises taxable income, 4(b) lowers it, and 4(c) adds a flat extra amount. Nothing on the W-4 touches Social Security or Medicare.
What do I put on Step 3 for dependents in 2026?
A dollar amount, not a headcount: $2,200 for each qualifying child under 17 plus $500 for each other dependent. Two kids and one other dependent is $4,900 on line 3. Your employer divides that by your number of paychecks and trims that slice off each check's federal withholding.
When should I check the Step 2 box (multiple jobs)?
Check it if you have more than one job, or you are married filing jointly and your spouse also works, and the jobs pay about the same. It switches your employer to a schedule with roughly half-width brackets and drops the standard-deduction adjustment to $0, so more is withheld, which is usually right when two incomes stack.
How does extra withholding (Step 4c) work?
It is a flat dollar amount added to every paycheck's federal withholding, on top of the calculated tax. People use it to cover a spouse's income, side income, or to avoid owing at tax time. If you want an extra $1,300 withheld over a year and you are paid biweekly, enter $50.
Why is little or no federal tax being withheld from my paycheck?
A few things cause this: low wages relative to the standard deduction, a large Step 3 dependent amount, big Step 4(b) deductions, or the Step 2 box left unchecked with two incomes. If your adjusted annual wage lands in the 0% band, $0 is withheld, which can leave you with a balance due at filing.
Does this calculator include Social Security, Medicare, or state tax?
No. This tool computes federal income tax withholding only, the piece the W-4 controls. Social Security (6.2%), Medicare (1.45%), and state tax are separate. Use the Salary to Paycheck Calculator for a fuller take-home number, or the Payroll Calculator app for the complete paycheck with FICA and all 50 states plus DC.
Which year tax tables does this use?
The 2026 IRS Publication 15-T percentage-method tables for automated payroll systems, released December 2025. The page states the tax year so you always know the basis, and it assumes a 2020-or-later Form W-4.
Will a bigger refund come from lowering my withholding?
No, it works the other way. Lowering withholding (more dependents, extra deductions) increases take-home now but shrinks your refund or creates a balance due. Raising withholding (checking Step 2, adding Step 4c) grows your refund but reduces each paycheck. The goal is usually to land near $0 owed or refunded.