How to Fill Out a W-4 in 2026: Step by Step

Starting a job means paperwork, and the W-4 is the form that touches your paycheck the most. It is only one page of questions, but the answers decide how much tax comes out of every check. Get it close, and you avoid both a big bill and a big, pointless refund. This guide walks through the 2026 form step by step.

What the W-4 does

Employers are required to withhold federal income tax from your wages and send it to the IRS during the year. Your Form W-4, Employee's Withholding Certificate, gives them the information they need to do it. The IRS says to complete a new form each year and when your personal or financial situation changes.

The form does not change how much tax you really owe. That is decided when you file your tax return. The W-4 only controls how much is paid in along the way. If too little is withheld, you owe money in April, and you may owe a penalty. If too much is withheld, you get a refund, which is your own money coming back.

Step 1: Your information and filing status

Enter your name, address, Social Security number and filing status. The three choices on the form are single or married filing separately, married filing jointly or qualifying surviving spouse, and head of household. Choose the one you expect to use on your tax return. Head of household is for unmarried people who pay more than half the cost of keeping up a home for a qualifying person, so check that you qualify before you tick it.

Step 2: Multiple jobs or a working spouse

Skip this step if you have one job and your spouse does not work. Otherwise, the correct amount of withholding depends on income from all the jobs, and each employer sees only its own pay. The form offers three ways to handle it:

1. Use the IRS Tax Withholding Estimator at irs.gov/W4App. This is the most accurate option, and the IRS says to use it if you or your spouse have self-employment income.
2. Use the Multiple Jobs Worksheet on page 3 of the form and put the result in Step 4(c).
3. Check the box in Step 2(c) if there are only two jobs in total. Do the same on the other job's W-4. The IRS says this is generally more accurate than the worksheet when the lower-paying job pays more than half of what the higher-paying job pays.

Complete Steps 3 to 4(b) on only one of the W-4s, usually the highest-paying job. If you fill them in on both, you will claim the credit twice and owe money later.

Step 3: Claim dependents and other credits

This step reduces your withholding by the amount of credits you expect. For the 2026 form, it applies if your total income will be $200,000 or less ($400,000 or less if married filing jointly):

• Multiply the number of qualifying children under age 17 by $2,200.
• Multiply the number of other dependents by $500.
• Add any other credits you expect. Then add the three amounts and enter the total.

To see how much this matters, take a single filer who earns $75,000 a year and is paid every two weeks, in a state with no income tax. With no dependents, the federal income tax on that pay is about $7,670 a year. With two qualifying children, it falls to about $3,270, because of the $4,400 in credits. Over 26 paychecks, that is about $169 more in each paycheck.

If you have children and leave Step 3 blank, your employer withholds as if you had none. You would get the credit back as a large refund. That is allowed, but it is a way of lending the government money for a year.

Step 4: Other adjustments (optional)

Step 4 has three parts, and each is optional.

• 4(a) Other income. If you expect income that has no withholding, such as interest, dividends or retirement income, enter it here, and the withholding goes up to cover it.
• 4(b) Deductions. If you expect to itemize or claim deductions above the standard deduction, use the Deductions Worksheet on page 4. The worksheet starts with the standard deduction for 2026: $32,200 if married filing jointly, $24,150 for head of household and $16,100 for single or married filing separately. If you take the standard deduction, the worksheet also lets you add cash gifts to charity, up to $1,000 ($2,000 if married filing jointly). Most people leave this blank.
• 4(c) Extra withholding. Enter an extra dollar amount you want taken from each paycheck. This is the easiest tool to fix a problem. If you owed tax last year, add a few dollars here.

Step 5: Sign

The form is not valid without your signature and the date. Give it to your employer, not to the IRS. Keep a copy for your records, especially if you used the Multiple Jobs Worksheet.

Claiming exemption from withholding

You may claim exemption for 2026 only if you meet both conditions: you had no federal income tax liability in 2025, and you expect no federal income tax liability in 2026. If you do, you check the box in the "Exempt from withholding" section and complete only Steps 1(a), 1(b) and 5. You need to submit a new W-4 by February 16, 2027, to keep the exemption going. The IRS warns that with an exemption you will have no income tax withheld and may owe tax and penalties when you file. Social Security and Medicare tax still come out of your pay.

When to send a new W-4

• You start a new job or add a second job.
• You get married or divorced, or your spouse starts or stops working.
• You have a child or another dependent.
• Your income changes by a lot, or you have a large amount of income with no withholding.
• Your last tax return showed a bill or a refund you did not expect.

How to check that it is right

1. Use the IRS Tax Withholding Estimator. It asks for your pay, your pay-stub year-to-date numbers and your family situation, and it tells you what to enter on the W-4.
2. Look at a recent pay stub. Multiply the federal income tax per period by the number of periods in a year, and compare with your expected tax for the year.
3. Do this again in mid-year if anything changed.

To see roughly what federal tax, Social Security and Medicare take from your pay, enter your pay, filing status and number of children in the paycheck calculator. It estimates your tax on your yearly pay, so your real withholding can differ by a few dollars a period.

Frequently asked questions

Can I change my W-4 whenever I want?

Yes. You can give your employer a new Form W-4 at any time, and the new amount starts with an upcoming pay period.

What happens if I do not turn in a W-4?

Your employer must treat you as single with no other adjustments, which usually means more tax is withheld than you need. You can send a form later to correct it.

Why did my refund shrink after I changed jobs?

A new job often means a new W-4, and a different pay schedule. If you had two jobs for part of the year and did not complete Step 2, too little may have been withheld.

Is it better to get a big refund or a small one?

A big refund means you overpaid during the year. The IRS does not pay interest on it in most cases. If you would rather have the money in each paycheck, lower your withholding. If you like having a lump sum, a refund is your own money coming back, but it is not a bonus.

Do I need to fill out a state form too?

Many states have their own withholding form or use the federal one. Ask your employer's payroll team or check your state revenue department.

The bottom line

You can fill out the W-4 in about ten minutes. Complete Step 1 and Step 5, add your children in Step 3, handle a second job in Step 2 and use the IRS estimator if your situation is not simple. Then check a pay stub, and change the form if the numbers look off.

Sources

• About Form W-4, Employee's Withholding Certificate, Internal Revenue Service
• 2026 Form W-4 and instructions (PDF), Internal Revenue Service
• Tax Withholding Estimator, Internal Revenue Service
• Publication 505 (2026), Tax Withholding and Estimated Tax, Internal Revenue Service
• Revenue Procedure 2025-32 (2026 inflation adjustments), Internal Revenue Service

The example uses the 2026 federal brackets and standard deduction for a single filer paid every two weeks, calculated by script. Last reviewed October 12, 2026.