TL;DR — the short version
- ✅ Only Steps 1 and 5 are required for most employees
- ✅ Step 2 only if you have two jobs or a working spouse
- ✅ Step 3 to claim child or dependent credits
- ✅ Step 4 for freelance income, itemized deductions, or extra withholding
What is a W-4 and why does it matter?
The W-4 (Employee's Withholding Certificate) tells your employer how much federal income tax to withhold from each paycheck. It doesn't determine what you owe — that's your tax return's job. But it does determine whether you get a refund, break even, or owe money each April.
Fill it out too conservatively and you over-withhold — handing the IRS an interest-free loan. Fill it out too aggressively and you under-withhold — and face a bill plus potential penalties. A correctly completed W-4 means you come close to breaking even.
Step 1 — Personal information (required)
What to fill in:
- Name and address: Your legal name as it appears on your Social Security card.
- Social Security number: Required. Your employer uses this to report withholding to the IRS.
- Filing status: Choose one of three options (see below).
Single or Married Filing Separately
You are unmarried, or married but filing a separate return from your spouse.
Married Filing Jointly
You are married and will file a joint return. Note: if your spouse also works, also complete Step 2.
Head of Household
You are unmarried, a qualifying child lived with you more than half the year, and you paid more than half of household costs. Provides a larger standard deduction than Single.
Step 2 — Multiple jobs or spouse works (optional)
Leave blank if this is your only job. Complete Step 2 only if you have two or more jobs at the same time, or if you are married and your spouse also works.
Without this step, each employer withholds as if their wages are your only income — which causes under-withholding when incomes combine into a higher bracket. You have three options:
Option A — IRS estimator
Most accurate. Go to irs.gov/W4App and enter all income sources. Use the result in Step 4c.
Option B — Multiple Jobs Worksheet
Page 3 of the W-4 has a table-based worksheet. Takes ~5 minutes with pay stubs handy.
Option C — Check the box
Simply check the box in Step 2(c). Halves your standard deduction for withholding, which increases withholding automatically. Slightly over-withholds.
See the full guide: W-4 Step 2 explained
Step 3 — Claim dependents (optional)
Leave blank if you have no dependents.This step reduces your withholding by the value of the tax credits you'll claim for dependents.
Qualifying children under 17: multiply the number of qualifying children by $2,000
Other dependents: multiply by $500 (parents, adult children, other relatives you support)
Enter the total of both amounts in Step 3
Only one person in a household should claim a dependent — not both spouses.
Step 4 — Other adjustments (optional)
Three sub-fields, all optional. Most employees leave all three blank.
4a — Other income
Annual income from non-job sources: freelance, dividends, interest, rental income. Entering this amount increases withholding to cover tax on that income.
4b — Deductions
Enter the amount by which your itemized deductions exceed your standard deduction. Only relevant if you file Schedule A. Entering this reduces withholding.
4c — Extra withholding
A flat dollar amount to add to every paycheck's withholding. Use this if you want a safety buffer or to cover a specific gap calculated by the IRS estimator.
Step 5 — Sign and date (required)
Sign and date the form under penalty of perjury. Your W-4 has no legal effect until you sign it. Submit to your employer's HR or payroll department — not to the IRS.
Skip the math — get exact W-4 amounts in 60 seconds
Enter your pay and situation — get the exact amounts to write on each line.
Open the W-4 Calculator →Common situations at a glance
Single, one job, no dependents
Step 1: Single. Steps 2–4: blank. Step 5: sign.
Married, only you work
Step 1: Married filing jointly. Steps 2–4: blank. Step 5: sign.
Married, both spouses work
Step 1: MFJ. Step 2: check the box (on the higher earner's W-4 only). Step 5: sign.
Single, two kids under 17
Step 1: Single. Step 3: enter $4,000. Step 5: sign.
Single with freelance side income
Step 1: Single. Step 4a: estimated annual freelance income. Step 5: sign.
Key terms in this article