The W-4 form tells your employer how much federal income tax to withhold from your paycheck. The 2020 redesign removed allowances and replaced them with a more direct dollar-amount system. Getting it right means no surprise tax bills — and not over-paying.
W-4 Sections Explained
- •Step 1: Personal info (filing status). Choose Single, MFJ, or Head of Household — this sets your default withholding tables.
- •Step 2: Multiple jobs. If you or spouse have multiple jobs, use the IRS withholding estimator or check the box (higher withholding).
- •Step 3: Claim dependents. For income under $200,000: multiply qualifying children under 17 by $2,000, other dependents by $500.
- •Step 4a: Other income not from jobs (interest, dividends, freelance). Withheld at your marginal rate.
- •Step 4b: Deductions. If itemizing and your deductions exceed the standard deduction, enter the excess.
- •Step 4c: Extra withholding per period. The easiest way to fine-tune.
Common Withholding Situations
- •Two-income household: Use the IRS estimator or check "Multiple Jobs" box; under-withholding is the #1 cause of unexpected tax bills
- •Freelance side income: Add estimated quarterly tax or increase W-4 withholding at your day job to cover self-employment tax
- •Got a big refund last year: Add an amount to Step 4c or increase deductions in Step 4b to reduce withholding going forward
- •Owed taxes last year: Check Step 2, reduce deductions, or add extra withholding in Step 4c
- •New job: Fill out W-4 based on your full-year situation, not just this job's income
The ideal withholding leaves you owing $0 or getting a small refund. A $3,000 refund means you over-withheld by $250/month — money that could have been invested or paying down debt all year.