Find out whether you're withholding too much or too little federal tax — and exactly what to put on line 4(c) to fix it.
The "Federal Income Tax" line on your most recent pay stub.
Mid-Year Correction (optional)
Enter 0 to break even — the goal for most people.
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| Situation | What It Means | W-4 Fix |
|---|---|---|
| Large refund | Over-withholding all year | Claim dependents in step 3, or reduce line 4(c) |
| Owed a lot | Under-withholding | Add extra withholding on line 4(c) |
| Near zero | Well calibrated | No change needed |
| Second job started | Withholding assumes one job | Complete step 2 |
What is a W-4 and when should I update it?
Form W-4 tells your employer how much federal income tax to withhold from each paycheck. Update it whenever your situation changes — a new job, marriage or divorce, a new child, a second job, or a large refund or bill last year.
How do I withhold more tax from my paycheck?
Enter an additional amount on line 4(c) of your W-4. That amount is withheld from every paycheck on top of the standard calculation. This is the simplest lever if you owed money last year.
How do I get more money in each paycheck?
If you consistently receive a large refund you are over-withholding. Claiming dependents on step 3, or reducing any extra withholding on line 4(c), lowers what comes out each pay period. Be careful not to under-withhold and owe at filing.
What does "exempt" on a W-4 mean?
Claiming exempt means no federal income tax is withheld. You may only claim it if you had no tax liability last year and expect none this year. Claiming it incorrectly can lead to a large bill and potential penalties.
Why did the W-4 stop using allowances?
The form was redesigned in 2020. Instead of counting allowances, it now asks directly about multiple jobs, dependents, other income, and deductions, which is intended to make withholding more accurate.