Finance

W-4 Paycheck Withholding Calculator

Q: How is federal withholding calculated from my W-4?

Payroll starts with your annual pay, subtracts the **standard deduction** for your filing status, applies the 2026 tax brackets, subtracts the **dependent credits** you claimed on Step 3 ($2,000 per child, $500 per other dependent), and divides by your number of pay periods — then adds any **extra withholding** from Step 4(c).

Q: How do I avoid owing taxes next year?

Add a flat amount to **Step 4(c) extra withholding**, reduce the credits you claim on Step 3, or — for a two-earner household — check the **Step 2 box**. Adding extra withholding is the simplest way to cover side/1099 income that has no withholding of its own.

Q: Does this include Social Security and Medicare?

No. This calculator estimates only **federal income tax withholding**. FICA — Social Security (6.2%) and Medicare (1.45%) — is withheld separately and is not affected by your W-4. State income tax withholding is also separate and set on a state form.

Q: What changed with the 2020+ W-4?

The redesigned W-4 removed **allowances**. Instead you enter dollar amounts directly: filing status, dependent credits, other income, and deductions. The standard deduction is built into the withholding formula, so the form is more transparent about what drives your withholding.

Q: Should married couples both claim dependents?

No — claim the dependents on **only one** spouse's W-4 (usually the higher earner). If both claim the same children on Step 3, your household under-withholds and likely owes at filing. For two jobs, the IRS Tax Withholding Estimator gives the most accurate split.

Estimate the federal income tax withheld from each paycheck based on your 2026 W-4: filing status, dependents, extra income, deductions, and extra withholding. See per-paycheck and annual withholding.

Data verified · July 2026
Edited by Martín Rodríguez
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Data updated: Jan 1, 2026 · Source: IRS — About Form W-4

Edited by: Martín Rodríguez (editorial policy )

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Your Form W-4 is the instruction sheet that tells your employer how much federal income tax to withhold from every paycheck. Fill it out one way and you get a big refund in April; fill it another way and you take home more now but might owe at filing. This calculator estimates the federal withholding per paycheck that your current W-4 settings produce for 2026, so you can check it before you submit the form.

Unlike a take-home-pay tool, this focuses on the number that actually appears in Box 2 of your W-2 at year-end: federal income tax withheld. It follows the IRS Publication 15-T percentage method — starting from your annual pay, subtracting the standard deduction and any extra deductions, applying the 2026 brackets, then subtracting the dependent credits you claim in Step 3 and adding any extra withholding from Step 4(c).

Enter your salary, pay frequency, filing status, and the W-4 details. The result shows both the per-paycheck and annual withholding, plus your effective withholding rate — the practical way to decide whether to tweak your W-4 up or down.

When to use this calculator

See how much federal tax comes out of each paycheck before you submit a new W-4.
Check whether claiming your kids on Step 3 lowers withholding too much.
Estimate withholding after a raise so you are not surprised in April.
Add extra withholding (Step 4c) to cover side income and avoid owing.
Compare withholding when switching from bi-weekly to semi-monthly pay.
See how filing jointly vs as head of household changes your withholding.
Dial your refund toward zero by adjusting deductions and credits on the W-4.
Estimate withholding for a new job at a different salary.
Account for Step 4(a) other income (interest, dividends) in your withholding.
Check how a large itemized deduction on Step 4(b) reduces what is withheld.

Approx. federal withholding per bi-weekly paycheck (single, no dependents, 2026)

Annual salary	Annual withholding	Per bi-weekly paycheck	% of pay
$40,000	$2,620	$101	6.6%
$60,000	$5,020	$193	8.4%
$80,000	$8,770	$337	11.0%
$100,000	$13,170	$507	13.2%
$150,000	$24,734	$951	16.5%

Source: IRS Publication 15-T method with 2026 brackets and the $16,100 single standard deduction, Step 2 box unchecked. Dependent credits (Step 3) and extra withholding (Step 4c) change these figures.

How it works

How W-4 withholding is figured

Annual taxable = Salary + Step 4a income − Step 4b deductions − standard deduction
Annual tax     = 2026 brackets applied to annual taxable
Annual withheld = Annual tax − Step 3 dependent credits  (floored at $0)
Per paycheck   = Annual withheld ÷ pay periods + Step 4c extra

This mirrors the IRS Publication 15-T percentage method that payroll systems use. The standard deduction is built in, which is why you no longer claim 'allowances' as you did on pre-2020 W-4s.

What each W-4 step does

W-4 step	Effect on withholding
Step 1 — filing status	Sets the standard deduction and bracket table
Step 2 — multiple jobs	Raises withholding for two-earner households (see note)
Step 3 — dependents	Lowers withholding: $2,000 per child, $500 per other dependent
Step 4a — other income	Raises withholding to cover untaxed income
Step 4b — deductions	Lowers withholding if you itemize above the standard deduction
Step 4c — extra	Adds a flat dollar amount to each paycheck

Worked example — the effect of claiming kids

A single parent earning $80,000, paid bi-weekly:

No dependents: ~$337 withheld per paycheck ($8,770/year).

Two children on Step 3: credits of $4,000 → $4,770/year → ~$183 per paycheck.

That is about $154 more take-home every two weeks — but a smaller refund (or a balance due) if the credit is over-claimed.

2026 standard deduction (built into the method)

Filing status	Standard deduction
Single / married filing separately	$16,100
Married filing jointly	$32,200
Head of household	$24,150

A note on two jobs (Step 2)

This calculator uses the standard method with the Step 2 box unchecked — correct for a household with one job (or one earner). If you or your spouse hold multiple jobs, checking the Step 2 box (or using the IRS Tax Withholding Estimator) increases withholding so you are not under-withheld across jobs. Two-earner couples who leave everything at default are the most common cause of an April balance due.

Withholding is not your final tax

Withholding is only an estimate collected through the year. Your actual tax is settled on your Form 1040. If too much was withheld you get a refund; if too little, you owe. The goal of a well-tuned W-4 is to land close to zero — keeping your money in your paycheck without a surprise bill.

Disclaimer

Educational estimate of federal income tax withholding only. It does not include Social Security or Medicare (FICA), state withholding, or the Step 2 multiple-jobs adjustment. For an authoritative result, use the IRS Tax Withholding Estimator. Consult a tax professional for your specific situation.

Example: $80,000 salary, single, paid bi-weekly, no dependents

Annual taxable: $80,000 − $16,100 standard deduction = $63,900.

2026 tax on $63,900 (single): $1,240 + $4,560 + $2,970 = $8,770.

No Step 3 dependent credits, so annual withholding = $8,770.

Per paycheck: $8,770 ÷ 26 = about $337.31.

About $337 withheld each bi-weekly paycheck

Frequently asked questions

How is federal withholding calculated from my W-4?

Payroll starts with your annual pay, subtracts the standard deduction for your filing status, applies the 2026 tax brackets, subtracts the dependent credits you claimed on Step 3 ($2,000 per child, $500 per other dependent), and divides by your number of pay periods — then adds any extra withholding from Step 4(c).

Why is nothing (or very little) being withheld?

Common reasons: your income is low enough that the standard deduction wipes out most taxable income, or you claimed large dependent credits on Step 3 that exceed your calculated tax. If you also have other income, this can lead to owing at filing — consider reducing Step 3 or adding Step 4(c) extra withholding.

How do I get a bigger paycheck now?

Increase the credits or deductions on your W-4 (Step 3 or Step 4b), which lowers withholding and raises take-home pay. Just remember: withholding less now means a smaller refund or a possible balance due in April. Aim for accuracy, not the biggest paycheck.

How do I avoid owing taxes next year?

Add a flat amount to Step 4(c) extra withholding, reduce the credits you claim on Step 3, or — for a two-earner household — check the Step 2 box. Adding extra withholding is the simplest way to cover side/1099 income that has no withholding of its own.

Does this include Social Security and Medicare?

No. This calculator estimates only federal income tax withholding. FICA — Social Security (6.2%) and Medicare (1.45%) — is withheld separately and is not affected by your W-4. State income tax withholding is also separate and set on a state form.

What changed with the 2020+ W-4?

The redesigned W-4 removed allowances. Instead you enter dollar amounts directly: filing status, dependent credits, other income, and deductions. The standard deduction is built into the withholding formula, so the form is more transparent about what drives your withholding.

Should married couples both claim dependents?

No — claim the dependents on only one spouse's W-4 (usually the higher earner). If both claim the same children on Step 3, your household under-withholds and likely owes at filing. For two jobs, the IRS Tax Withholding Estimator gives the most accurate split.

How often can I change my W-4?

Anytime, as often as you like. Submit a new W-4 to your employer after a raise, marriage, a new child, a second job, or a big change in deductions. It is good practice to review it once a year and after any major life or income change.

Sources & references

Methodology & trust

Editorial

Finance calculator with its formula verified automatically against IRS — About Form W-4, Employee's Withholding Certificate, per our editorial policy and methodology.

Updates

Updated: July 2026. Parameters are verified periodically against the cited sources.

Privacy

Calculations run 100% in your browser. We do not store or transmit your data.

Limitations

Indicative results. For critical decisions, consult a professional.

📌 How to cite this calculator

Rodríguez, M. (2026). W-4 Paycheck Withholding Calculator. Hacé Cuentas. https://hacecuentas.com/en/w4-paycheck-withholding-calculator

Content licensed under CC-BY 4.0 — reuse it citing the source with a link to Hacé Cuentas.

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