The 5 Steps of the W-4
| Step | What to Do | Required? |
|---|---|---|
| Step 1 | Personal information: name, address, SSN, filing status | ✅ Always required |
| Step 2 | Multiple jobs or spouse works: use IRS estimator, worksheet, or check the box | If applicable |
| Step 3 | Claim dependents: enter qualifying child ($2,000 each) and other dependent ($500 each) credits | If applicable |
| Step 4 | Other adjustments: other income (line 4a), deductions (4b), extra withholding (4c) | Optional |
| Step 5 | Sign and date | ✅ Always required |
Most people only need to complete Steps 1 and 5
If you have one job, no dependents, and no other income, just fill in your personal info (Step 1) and sign (Step 5). Your withholding will be calculated at the standard rate for your filing status.
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Step 2: Multiple Jobs (Most Complicated Part)
If you or your spouse have more than one job, you need to account for the combined income so enough tax is withheld. You have three options:
- Option A (Most accurate): Use the IRS Tax Withholding Estimator at irs.gov/W4app
- Option B: Complete the Multiple Jobs Worksheet on page 3 of the W-4
- Option C (Simplest, slightly over-withholds): Check the box in Step 2(c) on both spouses' W-4s
When to Update Your W-4
You should submit a new W-4 when:
- You get married or divorced
- You have a baby or adopt a child
- You start or stop a second job
- Your spouse starts or stops working
- You receive a large tax refund (you're over-withholding) or owe a large amount (under-withholding)
- You have significant investment income, freelance income, or large deductions
No deadline — but changes take effect quickly
Employers must implement a new W-4 within the first payroll period that ends on or after the 30th day after you submit it. You can submit a new W-4 at any time during the year.