2020
Year the W-4 was redesigned (no more allowances)
$2,860
Average US tax refund (2024) — often over-withholding
110%
Safe harbor: pay 110% of prior-year liability if AGI > $150K
5 steps
Sections on the current W-4 form
How the 2020+ W-4 works
The redesigned W-4 eliminated the allowances system in favor of a more transparent dollar-based approach. Step 1 captures your filing status and name. Step 2 is for multiple jobs or a working spouse — critical for households with two incomes. Step 3 claims the child tax credit. Step 4 is for additional deductions, other income, and extra withholding. Step 5 is your signature. Most employees only need Steps 1 and 5.
When you need to update your W-4
- Marriage or divorce — combined income may push you into a higher bracket
- Having a child — qualifies you for additional credits that reduce withholding needed
- Starting a second job — two jobs without W-4 adjustment routinely causes under-withholding
- Large deductions — itemizing significantly reduces your tax liability
- Getting a large refund or owing — either outcome signals withholding is off
- Significant income change — salary raise, bonus, freelance income added
How to use the W-4 withholding calculator
- Enter your expected annual salary and any other income sources
- Enter your spouse's income if applicable
- Select your filing status
- Enter any planned deductions above the standard deduction
- Enter credits you expect to claim (child tax credit, education credits)
- Review the recommended Step 4(c) additional withholding amount to add to your W-4
ℹ️ A refund is not free money
The average refund of $2,860 represents taxes you overpaid throughout the year. That money in a savings account at 5% APY would have earned $143. More importantly, the refund psychology often masks poor withholding planning — aim for a small refund or a small amount owed, not a large one.
Common mistakes to avoid
- Not completing Step 2 when you have a working spouse or multiple jobs — the most common cause of under-withholding
- Using the old pre-2020 allowances logic to fill out the current form
- Assuming that marriage means less withholding — at similar incomes, it may mean more
- Ignoring side income (freelance, rental, investments) that has no withholding attached
- Not updating after the child tax credit is no longer applicable as children age out
Related calculators
The US Income Tax Calculator shows your projected annual liability — the target your withholding should match. The Take-Home Pay Calculator shows how adjusting W-4 withholding affects each paycheck. And the Self-Employment Tax Calculator is essential if you have both W-2 and freelance income to ensure total estimated payments are adequate.