How to Fill Out Your W-4 in 2026: Step-by-Step Guide (OBBBA Updated)

The W-4 (Employee's Withholding Certificate) tells your employer how much federal income tax to withhold from each paycheck. Filling it out accurately keeps your withholding aligned with your actual tax liability — minimizing a large refund (an interest-free loan to the IRS) and avoiding a surprise balance due at filing.

The W-4 was redesigned in 2020. It no longer uses "allowances." The current version has five steps, two of which are optional for most workers.

Step 1: Personal information and filing status (required)

Enter your legal name, address, Social Security number, and filing status. Filing status is the most impactful choice:

• Single / Married Filing Separately: Uses the higher withholding table. Required if you file separately from your spouse.
• Married Filing Jointly: Uses a lower withholding table. Appropriate if you and your spouse file jointly and one spouse earns significantly more than the other, or one spouse does not work.
• Head of Household: For unmarried taxpayers who provide more than half the cost of a home for a qualifying person. Uses a table that falls between Single and Married.

Choosing Single when you qualify for Married Filing Jointly results in over-withholding throughout the year. Choosing Married when you should file Single results in under-withholding.

Step 2: Multiple jobs or a working spouse (optional but important)

If you have more than one job, or you are married filing jointly and your spouse also works, Step 2 is critical. Without it, each employer calculates withholding independently — treating your income from that job as if it were your only income. The result is under-withholding across both jobs.

Three options:

1. Use the IRS Tax Withholding Estimator at irs.gov (most accurate)
2. Complete the Multiple Jobs Worksheet on page 3 of the W-4
3. Check the box in 2(c) — only appropriate if there are exactly two jobs earning similar pay

Step 3: Claim Dependents — Updated for 2026 (optional)

The 2026 W-4 splits Step 3 into two sub-steps following OBBBA changes:

• Step 3(a) — Qualifying children under 17: multiply by $2,200 under the 2026 W-4 updates enacted through the One Big Beautiful Bill Act. Enter the total on Step 3(a).
• Step 3(b) — Other dependents (qualifying relatives and other qualifying persons): multiply by $500. Enter on Step 3(b).

Add 3(a) and 3(b) together and enter the sum on Step 3. Only complete this step if your total income is below $200,000 (single filers) or $400,000 (married filing jointly). Above these thresholds, the Child Tax Credit begins to phase out.

At a $2,200 credit per qualifying child, a family with two qualifying children claims $4,400 on Step 3(a). This reduces annualized withholding by $4,400, or approximately $169 per biweekly paycheck.

Step 4: Other adjustments (optional)

• 4(a) Other income: If you receive income from sources your employer does not know about — freelance work, rental income, dividends — adding that amount here increases withholding so you do not owe at filing.
• 4(b) Deductions: If you plan to itemize deductions that exceed the standard deduction (for example, large mortgage interest, medical expenses, or state taxes), enter the expected excess here. This reduces your annualized taxable wages, reducing withholding. The 2026 W-4 also expanded Step 4(b) to include deductions for qualified tips and qualified overtime compensation under the OBBBA — if these apply to you, your employer or a tax professional can assist with the correct amount to enter.
• 4(c) Extra withholding: A flat dollar amount added to each paycheck's withholding. Useful when you know you will owe at filing and want to pay gradually throughout the year rather than in one lump sum.

Step 5: Sign and date (required)

Under penalties of perjury. If you do not sign, the employer must withhold using the Single / No Adjustments rate.

The 2026 W-4 adds a dedicated checkbox for employees who are exempt from federal income tax withholding. To claim exempt, check the box and certify that you had no federal tax liability in 2025 and expect none in 2026. Most workers do not qualify for exempt status.

When to update your W-4

Update your W-4 as soon as possible after any of the following:

• Getting married or divorced
• Having a child or adopting
• A spouse starting or stopping work
• Starting a second job
• Receiving a large bonus or one-time payment
• Purchasing a home (itemized deductions may exceed the standard deduction)
• Getting a significant raise that crosses a tax bracket

You can submit a new W-4 to your employer at any time. There is no limit on how frequently you can update it.

Frequently asked questions

How does Step 3 work for qualifying children and other dependents in 2026?

The 2026 W-4 splits Step 3 into 3(a) and 3(b). Enter $2,200 for each qualifying child under 17 on Step 3(a), enter $500 for each other dependent on Step 3(b), then add both amounts together on Step 3. Claiming $2,200 per qualifying child ($4,400 for two qualifying children) reduces each biweekly paycheck withholding by approximately $169.

Do I need to file a new W-4 every year?

No, unless you claimed exempt from withholding (Line 4 of the old form, or specific language on the current form). A W-4 remains in effect until you submit a new one. However, it is good practice to review it annually or whenever your circumstances change.

What happens if I do not submit a W-4?

Your employer must withhold at the Single / No Adjustments rate — the highest withholding rate. You will almost certainly over-withhold and receive a refund, but you will have less take-home pay throughout the year.

Can I claim exempt from withholding?

Only if you had no federal tax liability the prior year and expect none in the current year. Most workers do not qualify. Claiming exempt incorrectly results in a large balance due at filing plus potential penalties.