How to Fill Out Form W-4 (2026)

What Form W-4 Does and Who Needs It

Form W-4, the Employee's Withholding Certificate, tells your employer how much federal income tax to withhold from your pay. It is not a tax return — you do not send it to the IRS. You give the completed, signed form to your employer, and payroll uses it to set your withholding for every paycheck until you submit a new one.

You need to fill out a W-4 whenever you start a new job. You should also submit a new one after major life or income changes — marriage or divorce, the birth or adoption of a child, a spouse gaining or losing a job, a second job, or significant non-job income. Reviewing the form once a year keeps your withholding aligned with your actual tax situation and helps you avoid an unpleasant surprise at filing time. The instructions below follow the official 2026 form; download the blank form from the IRS at IRS Form W-4 (fw4.pdf).

Before You Start: What You Need

Gather these items before you pick up the form so you can complete it in one sitting:

• Your Social Security number. Step 1 requires it, and to claim certain credits or deductions on your return, you (and your spouse if married filing jointly) must have a Social Security number valid for employment.
• Your filing status. Know which of the three Step 1(c) boxes matches your situation for the year.
• Second-job and spouse pay information. If Step 2 applies, have approximate annual pay figures for both jobs, or be ready to use the IRS online estimator.
• Your dependent count. How many qualifying children under 17 and how many other dependents you expect to claim.
• Last year's return or a recent pay stub. Useful for estimating other income, deductions above the standard deduction, and any extra withholding you may want.

Step 1: Enter Personal Information

Quick answer: Enter your name, address, and Social Security number, then check exactly one of the three filing-status boxes. Remember that certain credits and deductions require a Social Security number valid for employment.

Step 1 collects your name, address, Social Security number, and filing status. Fill in each line carefully — your name and Social Security number must match your Social Security card so your earnings are credited correctly.

Step 1(c) has exactly three checkboxes, and you check the one that matches your filing status:

1. "Single or Married filing separately" — check this if you are unmarried, or married but filing a separate return from your spouse.
2. "Married filing jointly or Qualifying surviving spouse" — check this if you are married and will file a joint return, or if you qualify as a surviving spouse.
3. "Head of household (Check only if you're unmarried and pay more than half the costs of keeping up a home for yourself and a qualifying individual.)" — check this only if you meet that test.

One caution from the form instructions: to claim certain credits or deductions on your tax return, you (and your spouse if married filing jointly) must have a Social Security number valid for employment. An Individual Taxpayer Identification Number alone is not enough for those particular benefits, so enter a valid Social Security number in Step 1.

Step 2: Multiple Jobs or Spouse Works

Quick answer: Complete this step if you hold more than one job at a time, or are married filing jointly and your spouse also works. Use the IRS estimator (most accurate), the Multiple Jobs Worksheet, or — with only two jobs total — check the box on both W-4s.

Complete Step 2 if you (1) hold more than one job at a time, or (2) are married filing jointly and your spouse also works. Without this step, each job withholds as if it were your only income, which usually means too little total withholding and a balance due at filing time.

Do only one of the following:

• (a) Use the IRS estimator at www.irs.gov/W4App. This is the most accurate option. Use this option if you or your spouse have self-employment income, because the worksheet does not handle that situation well.
• (b) Use the Multiple Jobs Worksheet on page 3 of the form instructions and enter the result in Step 4(c) on the W-4 for the highest-paying job.
• (c) If there are only two jobs total, check the box. Check the Step 2(c) box on the W-4 for each job — do the same on the W-4 for the other job (or on your spouse's W-4).

Accuracy rule: option (c), the checkbox, is generally more accurate than option (b), the worksheet, if pay at the lower-paying job is more than half of pay at the higher-paying job. Otherwise, the worksheet (b) is generally more accurate.

Important: complete Steps 3 through 4(b) on only one job's W-4 — for the most accurate withholding, the highest-paying job's W-4. Leave Steps 3 through 4(b) blank on the W-4s for the other jobs. This prevents credits and deductions from being counted twice.

Step 3: Claim Dependent and Other Credits

Quick answer: Complete Step 3 only if your total income will be $200,000 or less ($400,000 or less if married filing jointly). Multiply qualifying children under 17 by $2,200, other dependents by $500, add any other credits, and enter the total.

Step 3 converts the tax credits you expect on your return into less withholding per paycheck. Only complete it if your total income will be $200,000 or less ($400,000 or less if married filing jointly). If your income is above those thresholds, skip Step 3.

• Step 3(a): multiply the number of qualifying children under age 17 by $2,200.
• Step 3(b): multiply the number of other dependents by $500.
• Step 3 total: add the 3(a) and 3(b) amounts plus any other credits you expect, such as the foreign tax credit or education credits, and enter the total on line 3.

Worked example: two qualifying children under 17 and no other dependents gives 2 × $2,200 = $4,400 on line 3.

Eligibility matters: a qualifying child must be under 17 as of December 31, generally live with you for more than half the year, and have the required Social Security number. Claiming credits you are not entitled to means too little withholding now and a tax bill later, so claim only amounts you genuinely expect on your return. If you are unsure whether a dependent qualifies, see our guide to the tax refund calculator for how credits flow through to your refund or balance due.

Step 4: Other Adjustments

Quick answer: Use 4(a) for non-job income such as interest and dividends, 4(b) for deductions above the standard deduction from the Deductions Worksheet, and 4(c) for any extra tax you want withheld each pay period.

Step 4 fine-tunes withholding for income and deductions the earlier steps do not capture. Each line has a distinct job:

• Step 4(a) — Other income (not from jobs). Enter income such as interest, dividends, or retirement income. Do not include income from jobs or self-employment here — that is handled through Steps 1 and 2.
• Step 4(b) — Deductions. If you expect to claim more than the basic standard deduction, complete the Deductions Worksheet and enter the amount from line 15 of that worksheet. This covers itemized deductions plus amounts such as qualified tips up to $25,000 (if income is under $150,000, or $300,000 if married filing jointly), overtime compensation, passenger vehicle loan interest up to $10,000, student loan interest, IRAs, and the additional $6,000 for filers age 65 and older (if income is under $75,000, or $150,000 if married filing jointly). If you skip this line, withholding is based on the standard deduction.
• Step 4(c) — Extra withholding. Enter any additional tax you want withheld from each pay period. This includes the result from line 4 of the Multiple Jobs Worksheet. Extra withholding reduces each paycheck but increases your refund or reduces any balance due at filing time.

Step 5: Sign Here

Quick answer: Sign and date the form, then give it to your employer. An unsigned W-4 is not valid.

Enter your signature and the date, then hand the form to your employer's payroll or HR department. The form states plainly: "This form is not valid unless you sign it." An unsigned form cannot be processed, so this single line is the difference between a completed W-4 and a rejected one. Keep a copy or photo for your records.

Filled Example A: Single, One Job, No Dependents

This is the simplest case — for example, how to fill out a W-4 if single with one job and no dependents.

Result: withholding follows the standard single withholding with no adjustments — exactly right for a single filer with one job and no other tax situations. Your per-paycheck take-home will reflect that baseline; use our paycheck calculator to see the numbers.

Filled Example B: Married Filing Jointly, Two Kids, Two Jobs

A married couple filing jointly, both working, with two qualifying children under 17.

Result: the Step 2(c) boxes on both W-4s account for the combined income, while the $4,400 dependent credit appears on only one form so it is counted once. If the lower-paying job earns more than half of the higher-paying job, the checkbox method is generally the more accurate choice; otherwise use the Multiple Jobs Worksheet and put its line 4 result in Step 4(c) on the higher-paying job's W-4.

Filled Example C: College Student, Part-Time, Claimed as a Dependent

A college student with one part-time job who will be claimed as a dependent on a parent's return.

A note on exempt: some students ask about claiming exempt from withholding. You may claim exempt only if you meet both no-liability conditions — you had no federal tax liability last year (a right to a refund of all withheld tax) and you expect none this year. Being a student or working part-time alone does not qualify you. The certification on the form reads: "I claim exemption from withholding for 2026, and I certify that I meet both of the conditions for exemption for 2026." Exempt status lasts only for the calendar year given; to stay exempt, submit a new W-4 by February 15 of the next year (or the next business day if that date falls on a weekend or holiday). If you miss the deadline, your employer must withhold as if you were Single or Married filing separately with no Step 2, 3, or 4 entries.

5 Common W-4 Mistakes to Avoid

1. Completing Steps 3–4(b) on both jobs' forms. Credits and deductions must go on one W-4 only (the highest-paying job). Entering them twice understates withholding on both paychecks.
2. Skipping Step 2 when a spouse works. Married filing jointly with a working spouse and a blank Step 2 is one of the most common causes of an April balance due.
3. Claiming Step 3 credits you are not eligible for. Only claim the child and other-dependent amounts you genuinely expect on your return, within the $200,000 / $400,000 income limit.
4. Leaving a stale W-4 after a life change. Marriage, divorce, a new baby, a dependent aging out, or a spouse starting or leaving a job all change the right answers — file a new W-4 promptly.
5. Forgetting to sign. The form is not valid without your signature and date in Step 5. Unsigned forms get returned and delay correct withholding.

When to Submit a New W-4

File a new W-4 with your employer whenever any of these happen:

• Starting a new job (a fresh W-4 is always required).
• Marriage or divorce, or a change in filing status.
• A baby, adoption, or other dependent change — including a child turning 17.
• Your spouse gains or loses a job.
• Large new non-job income (interest, dividends, retirement income, side income reported elsewhere).
• A refund or balance-due surprise that shows your withholding was off — run the numbers through our W-4 withholding calculator and adjust Steps 3 or 4(c).

Low-income workers who qualify for the Earned Income Tax Credit should be especially careful: correct withholding plus the credit can meaningfully change a refund, so keep the W-4 current as household income changes.

W-4 vs W-2 vs 1040: How They Fit Together

In short: the W-4 sets withholding before you are paid, the W-2 reports what was paid and withheld after the year ends, and Form 1040 settles the difference. Getting the W-4 right is how you avoid lending the government money interest-free all year — or owing a lump sum in April. Our tax refund calculator shows how withholding flows into that final refund-or-owed figure.