W-4 Withholding Calculator

The 2026 standard deductions per IRS Rev. Proc. 2025-32 are: $16,100 for Single and Married Filing Separately · $32,200 for Married Filing Jointly · $24,150 for Head of Household. These are up from $15,000/$30,000/$22,500 in 2025. Adults age 65 or older can add an extra $2,050 (single) or $1,650 per qualifying spouse (MFJ).

Update your W-4 after any major life change: marriage or divorce · new child or dependent · new job or second job · spouse starts or stops working · large unexpected refund or tax bill last year · significant change in other income (freelance, investments) · starting to claim new OBBBA deductions (qualified tips, overtime). The IRS requires submission within 10 days of a change that increases your liability.

If you owe tax at filing, add extra withholding in Step 4(c) of a new W-4. Calculate how much extra you need for the full year, divide by your remaining paychecks, and enter that amount. Example: you expect to owe $2,400 over the next 24 bi-weekly paychecks, enter $100 per paycheck in 4(c). This is the cleanest fix — more reliable than quarterly estimated payments for employees with predictable income.

The Child Tax Credit for 2026 is $2,220 per qualifying child under age 17 (up from $2,200 in 2025, indexed for inflation). Up to $1,700 is refundable. Enter the total credit (children x $2,220) in Step 3 of your W-4. The credit phases out for incomes above $400,000 (MFJ) and $200,000 (all others). An additional $500 credit applies to other qualifying dependents.

Each employer withholds as if the job is the only income. When you combine two salaries on one return, the combined income may push you into a higher bracket, causing under-withholding. Fixes: (1) Check Step 2(c) on both W-4s — easiest option, uses higher withholding tables. (2) Use the IRS Multiple Jobs Worksheet. (3) Have one spouse add extra withholding in Step 4(c). This is one of the most common causes of unexpected tax bills for married couples.

The No Tax on Tips (up to $25,000) and No Tax on Overtime (up to $12,500 single / $25,000 MFJ) deductions from the One Big Beautiful Bill Act are claimed on your annual tax return, not through payroll withholding. Your employer still withholds on tips and overtime during the year. To account for these deductions, enter the expected amount in Step 4(b) of your W-4 to reduce withholding accordingly.

You can claim exempt only if you had zero federal tax liability in 2025 AND expect zero liability in 2026. Most working adults do not qualify since income above $16,100 (single) is taxable. If you claim exempt when ineligible, you may owe a large bill plus underpayment penalties. Exempt status expires February 15, 2026 and must be re-submitted each year to continue.

Enter your expected annual freelance / self-employment income in Step 4(a) of your W-4. Your employer will then withhold extra tax on that amount as if it were additional wages. Alternatively, enter a specific extra dollar amount per paycheck in Step 4(c). Either approach avoids the need for quarterly estimated tax payments (Form 1040-ES) for employees who have a regular W-2 job with predictable withholding.

2026 brackets for Single filers: 10% up to $12,400 · 12% up to $50,400 · 22% up to $105,700 · 24% up to $201,775 · 32% up to $256,225 · 35% up to $640,600 · 37% above $640,600. For MFJ, thresholds are approximately double. These are marginal rates — only income in each range is taxed at that rate. See our Tax Bracket Calculator for a full visual breakdown.

The IRS safe harbor: total payments (withholding + estimates) must equal at least 90% of your 2026 tax OR 100% of your 2025 tax (110% if 2025 AGI exceeded $150,000). For W-2 employees with only wage income, correct withholding typically covers this automatically. If you have significant non-wage income (investments, freelance, rental), you may also need quarterly estimated payments using Form 1040-ES by Apr 15, Jun 15, Sep 15, and Jan 15.