The W-4 determines how much federal tax comes out of every paycheck. Here's a step-by-step guide to filling it out correctly for 2026.
By ExpertPaystubs Editorial Team. Published 2026-01-08
The Form W-4 is the single document that controls how much federal income tax your employer withholds from each paycheck. Fill it out wrong, and you'll either owe the IRS thousands at tax time or give them an interest-free loan all year.
What Changed Since 2020
The IRS redesigned the W-4 in 2020, eliminating "allowances" entirely. The new form uses actual dollar amounts:
- Step 1: Your personal information and filing status
- Step 2: Multiple jobs or spouse works (Two-Earners/Multiple Jobs)
- Step 3: Claim Dependents ($2,000 per qualifying child, $500 for other dependents)
- Step 4(a): Other income not from jobs (investments, side gigs)
- Step 4(b): Deductions other than the standard deduction (itemized deductions)
- Step 4(c): Extra withholding per pay period
Step-by-Step Instructions
Step 1: Personal Information
Choose your filing status:
- Single or Married Filing Separately — Higher withholding
- Married Filing Jointly — Lower withholding (assumes one income)
- Head of Household — Middle ground
Step 2: Two Jobs or Spouse Works
If you (or your spouse) hold multiple jobs simultaneously:
- Option A: Use the IRS Tax Withholding Estimator (most accurate)
- Option B: Use the Multiple Jobs Worksheet on page 3
- Option C: Check the box if there are only two jobs with similar pay
Step 3: Dependents
Multiply qualifying children under 17 by $2,000. Add $500 per other dependent. Enter the total. This reduces your withholding.
Step 4: Other Adjustments
- 4(a): Enter income not from jobs (rental income, dividends, interest) to increase withholding
- 4(b): Enter extra deductions above the standard deduction to decrease withholding
- 4(c): Enter any additional flat dollar amount you want withheld per pay period
Common Scenarios
Single, One Job, No Dependents
Just complete Step 1. Leave everything else blank. Your employer will withhold based on the standard single rate.
Married, Both Spouses Work
Complete Step 1 (Married Filing Jointly) and Step 2. Use the IRS estimator or check the box in 2(c) if both jobs have similar pay.
Single Parent, Two Kids
Complete Step 1 (Head of Household), skip Step 2, enter $4,000 in Step 3 (2 × $2,000).
Freelancer with a Day Job
Complete Steps 1-3 normally. In Step 4(a), enter your expected annual freelance net income. This ensures extra withholding to cover self-employment tax.
When to Update Your W-4
Submit a new W-4 whenever:
- You get married or divorced
- You have a child
- You start or stop a second job
- Your spouse starts or stops working
- You have significant investment income changes
- You owed more than $1,000 at tax time last year
- You received a refund larger than $3,000
Generate Pay Stubs with Accurate Withholding
ExpertPaystubs uses the same 2026 IRS Publication 15-T tables that your employer uses. Enter your W-4 elections and see exactly how they affect your take-home pay.