Tax Withholding Calculator 2026 — W-4 Withholding Estimator

Annual Gross Income ($)

Total salary or wages before any deductions

Filing Status

Pay Frequency

Federal Tax Withheld per Paycheck ($)

From your pay stub (federal income tax line only)

401(k) Contribution (%)

Pre-tax retirement contribution

Pre-tax Deductions ($/paycheck)

HSA, FSA, dental, etc.

Estimated Amount Owed

$1,577

You may owe at tax time — consider increasing your withholding

Withholding vs Tax

Federal Income Tax$8,077

Annual Withholding$6,500

Under-withheld (owed)$1,577

W-4 Adjustment Recommendation

Increase your W-4 withholding by $61 per paycheck (Step 4c on Form W-4) to avoid owing at tax time.

FICA Breakdown

Social Security (6.2% up to $184,500)$5,270

Medicare (1.45%)$1,233

Total FICA$6,503

Full Breakdown

Gross Income$85,000

401(k) Contribution- $4,250

Other Pre-tax Deductions- $3,900

Standard Deduction- $16,100

Taxable Income$60,750

Marginal Tax Rate22%

Effective Federal Rate9.5%

Total Tax Liability (Fed + FICA)$14,580

Underpayment Penalty Risk

You may owe more than $1,000 at tax time. If your withholding was less than 90% of your total tax liability, the IRS may charge an underpayment penalty under IRC Section 6654. Consider increasing your W-4 withholding or making an estimated tax payment. Use the Estimated Tax Penalty Calculator to check.

OBBBA Changes Affecting 2026 Withholding

The One Big Beautiful Bill Act (OBBBA) has updated several provisions for 2026, including a higher SALT deduction cap ($40,400), a $400 minimum QBI deduction, and new deductions for car loan interest and tipped income. If these apply to you, your actual tax may be lower than estimated here, meaning your current withholding may result in a larger refund. Adjust your W-4 accordingly.

Disclaimer

This tool provides estimates for educational purposes only and is not tax advice. Results use 2026 federal figures and do not account for state taxes, credits, multiple jobs, or your full tax situation. Your actual withholding may vary based on employer methods and W-4 elections. Consult a qualified tax professional before making financial decisions.

How this is calculated

This calculator estimates whether your current federal income tax withholding is on track for 2026, following IRS Publication 15 and Publication 505:

Annual pre-tax deductions = 401(k)% × gross income + pre-tax deductions per paycheck × pay periods.
Taxable income = gross income − pre-tax deductions − 2026 standard deduction ($16,100 single, $32,200 MFJ, $24,150 HoH).
Federal income tax = progressive brackets applied to taxable income using 2026 rates.
FICA = 6.2% Social Security (up to $184,500) + 1.45% Medicare + 0.9% Additional Medicare above $200,000 (single) or $250,000 (MFJ).
Annual withholding = federal tax withheld per paycheck × pay periods.
Withholding gap = annual withholding − federal income tax. Positive = refund; negative = amount owed.
Per-paycheck adjustment = withholding gap ÷ pay periods, to bring you to break-even.

Sources

Reviewed against 2026 figures · Last updated June 8, 2026

zhisan

Independent Developer

Full-stack developer passionate about building useful tools for the developer community. Creates free, privacy-focused web applications that solve everyday coding problems.

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What is How to Use the Tax Withholding Calculator?

Federal tax withholding is the amount your employer deducts from each paycheck for federal income tax. Getting it right means neither owing a large balance nor receiving a large refund at tax time.

How to Use

Enter your annual gross income
Select your filing status and pay frequency
Enter the federal tax withheld on your most recent paycheck
Add any 401(k) contributions and pre-tax deductions
See whether you are on track for a refund or balance due

Why Use This Tool?

Avoid surprise tax bills and underpayment penalties

Stop giving the government an interest-free loan via over-withholding

Get specific W-4 adjustment recommendations

Understand your FICA and income tax breakdown

Tips & Best Practices

A large refund is not free money — it means you overpaid throughout the year and missed out on investment returns
Submit a new W-4 to your employer to adjust withholding; changes take effect on your next paycheck
If you owe more than $1,000 and your withholding was less than 90% of your tax, you may face an underpayment penalty
The 2026 standard deduction is $16,100 for single filers and $32,200 for married filing jointly
Multiple jobs or a working spouse? Check the W-4 Step 2 box or use the IRS Tax Withholding Estimator for more accuracy

Frequently Asked Questions

How do I know if my withholding is correct?

Your withholding is correct if you neither owe a large balance nor receive a large refund at tax time. Aim for a refund or balance due under $500. A large refund means you over-withheld and gave the government an interest-free loan.

How do I adjust my W-4 withholding?

Submit a new Form W-4 to your employer. On the 2020+ W-4, use Step 4c to add extra withholding per paycheck, or Step 3 to claim dependent credits. Changes take effect on your next paycheck.

What happens if I under-withhold?

If you owe more than $1,000 at tax time and your withholding was less than 90% of your tax liability, you may owe an underpayment penalty (IRC Section 6654). The penalty is essentially interest on the underpaid amount.

What is the 2026 standard deduction?

The 2026 standard deduction is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for head of household.

Should I aim for a refund or break even?

Financially, breaking even is optimal — you keep more money in each paycheck to invest or save. A large refund means you overpaid throughout the year. However, some people prefer over-withholding as forced savings.