How to Fill Out a W-4 in 2026

Form W-4 tells your employer how much federal income tax to take out of your pay. Working out how to fill out a W-4 matters because the form is the only control you have over that number, and the 2026 version changed in several places, including how you claim exemption from withholding.

This article explains what the form asks. It is not tax advice, and it does not tell you what to enter for your own situation. For that, use the IRS Tax Withholding Estimator at IRS.gov/W4App or speak to a tax professional.

What the W-4 does, and what it does not do

The W-4 sets your withholding. It does not set your tax.

Your actual liability is calculated when you file. Withholding is your employer's running estimate of it, paid across the year: too high and you get a refund, too low and you owe. The form exists to make the estimate closer.

You give the form to your employer, not to the IRS. Your employer generally keeps it and uses it with the IRS withholding tables to work out each paycheck, and the result appears on your pay stub as the federal income tax line.

If you never hand one in, your employer does not guess. The IRS instructs employers to treat you as though you had selected Single or Married filing separately in Step 1(c), with no entries in Steps 2, 3 or 4. That is the IRS default baseline rather than the maximum the form can produce, since Step 2(c) or an amount in Step 4(c) can withhold more.

Step 1: personal information and filing status

Lines 1(a) and 1(b) are your name, address and Social Security number. Use the name that matches your Social Security card, because a mismatch creates problems that surface months later.

Line 1(c) is your filing status: Single or Married filing separately, Married filing jointly or Qualifying surviving spouse, or Head of household. This is the single biggest lever on the form, because it selects which withholding table your employer uses.

If you are claiming exemption from withholding, Steps 1(a), 1(b) and 5 are the only parts you complete, plus the checkbox covered below. Everything else stays blank.

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Step 2: more than one job, or a working spouse

Skip this step if you hold one job and, where you file jointly, your spouse does not work. Complete it otherwise.

The problem it solves is arithmetic. Each employer withholds as though its paycheck is your only income, so two jobs each withholding correctly in isolation will together withhold too little.

You have three options, in the IRS's own order of accuracy. Use the online estimator. Use the Multiple Jobs Worksheet and carry the result to Step 4(c). Or, where there are exactly two jobs of broadly similar pay, check the box in Step 2(c) on the W-4 for both.

Checking the Step 2(c) box makes your employer use a different withholding column, which increases the amount taken from each paycheck. That is the intended effect, not an error.

Step 3: dependents and other credits

Step 3 is split into 3(a) and 3(b) on the 2026 form, where earlier versions ran it together.

Line 3(a) covers the Child Tax Credit for qualifying children under 17, and the 2026 amount is 2,200 dollars per child, raised from 2,000. Line 3(b) covers credits for other dependents. The IRS instructions also allow you to add an estimate of other credits you expect to claim and enter the combined total.

Claiming credits here reduces your withholding across the year rather than waiting for a refund, and overstating them produces a bill instead. Where you hold several jobs, only one W-4 should carry these amounts, because entering them twice claims the same credit twice.

Step 4: other income, deductions, and extra withholding

The 2026 form removed the word "optional" from this step, which is a signal to read it rather than an instruction to fill it in.

Line 4(a), other income. Income you expect that has no withholding of its own, such as interest, dividends and retirement income. Entering it here covers the tax on that income through your paycheck instead of through estimated payments.

Line 4(b), deductions. Use this when you expect to claim deductions beyond the basic standard deduction. The 2026 Deductions Worksheet grew to a full page to hold new categories including qualified tips, qualified overtime, passenger vehicle loan interest, student loan interest, retirement contributions and the deduction for seniors. Several carry income limits and identification requirements, so work the worksheet rather than estimating. The form now says plainly that leaving this line empty means your withholding is based on the standard deduction.

Line 4(c), extra withholding. A flat amount taken from every paycheck on top of everything else. The Multiple Jobs Worksheet result goes here, and it is the simplest way to cover a shortfall you already know about.

Claiming exemption from withholding, which changed for 2026

This is the change most likely to catch someone who has filled the form in before.

Through 2025 you claimed exemption by writing "Exempt" in the blank space below Step 4(c). For 2026 the IRS replaced that with a checkbox in a new section directly beneath it. The box sits next to a statement confirming the claim, the two conditions, and that a new form will be needed for 2027.

Both conditions have to be true: you had no federal income tax liability last year, and you expect none this year.

A refund on its own settles nothing either way. Getting money back can mean you had a liability and overpaid it, and it can equally mean you had no liability at all and every dollar came back. The second case meets the test. What matters is your liability for the year, the figure on your return, not whether a refund arrived.

If you claim exemption, complete Steps 1(a), 1(b) and 5, check the box, and leave every other step blank. The claim lapses annually, which is why the certification mentions 2027.

Step 5: sign, date, and hand it in

You have not finished filling out a W-4 until it is signed. The form is a declaration made under penalties of perjury and is not valid unsigned. Give it to payroll, keep a copy, and check your next pay stub to confirm it took effect.

When to file a new W-4

The IRS lists specific triggers, and most of them are events rather than dates:

• You or your spouse start another job and select the Step 2(c) checkbox, in which case a new form is needed for the first job as well
• You or your spouse expect a raise of more than 10,000 dollars in regular wages at a second or third job while the Step 2(c) box is not selected
• You no longer expect to claim a Child Tax Credit you accounted for previously
• Your other credits fall by more than 500 dollars from the amount you accounted for
• Your deductions fall by more than 2,300 dollars from the amount you accounted for
• You no longer reasonably expect to qualify for exemption from withholding
• Marriage, divorce, a new child and a spouse leaving work change the arithmetic too, and none updates the form for you.

Three things the W-4 will not do

It will not recover tax already withheld. Your employer cannot repay what it has already sent to the IRS, so you claim the full amount when you file. The exception is tax withheld incorrectly against the form you had in effect, which your employer can put right.

It will not change your state withholding. Many states run their own certificate, and the federal form does nothing to the state line on your stub.

It will not make your withholding exact. It is an estimate built from what you tell it, and a mid-year change to your income moves the answer whether or not you file a new form.

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Key takeaways

• The W-4 controls how much federal income tax your employer withholds, and you give it to your employer rather than to the IRS
• Filing status in Step 1(c) selects the withholding table, which makes it the single largest lever on the form
• For 2026, exemption from withholding is claimed with a checkbox below Step 4(c) instead of writing "Exempt" in the blank space
• Step 3 now splits into 3(a) and 3(b), and the Child Tax Credit amount rose to 2,200 dollars per qualifying child
• If you do not fill out a W-4 at all, your employer withholds as though you selected Single with no other entries

FAQs

What happens if I never hand in a W-4?

Your employer applies the IRS default: Single or Married filing separately, with no entries in Steps 2, 3 or 4. For most people that withholds more than a completed form would, though it is a baseline rather than a ceiling, because Step 2(c) and Step 4(c) can both take more. The money is not lost either way, but you wait until you file to see it.

I got a refund last year. Can I claim exempt?

A refund on its own does not answer it. Exemption turns on whether you had a federal income tax liability, and a refund is consistent with both having one and overpaying it, and with having none at all. Check the liability line on last year's return rather than the refund amount.

Does my employer send my W-4 to the IRS?

Not routinely. Your employer keeps it on file and uses it to calculate withholding, and the IRS sees the result on your W-2 rather than the form. The IRS can direct an employer to submit particular W-4s for review, so it is not never.

Why did my withholding jump after I checked the box in Step 2?

Because that is what the box does. It directs your employer to a different column in the withholding tables, which produces a higher deduction on the assumption that a second income exists. If you checked it in error, file a new form.

Can my employer give back tax it has already withheld?

Not once it has been sent to the IRS. You claim it on your return instead. The exception is where your employer withheld more than the form you had in effect called for, which it can correct directly.