The W-4 Withholding Rule
Form W-4 (Employee's Withholding Certificate) instructs your employer's payroll system how much federal income tax to deduct from each paycheck. The current version uses a five-step system — Steps 2 through 4 are optional but improve accuracy for complex situations like multiple jobs, dependents, or significant non-wage income.
How W-4 Withholding Works
- You may claim exempt only if you had zero federal tax liability last year AND expect zero liability this year.
- Exempt status must be renewed each year — it expires February 15. If you don't refile, withholding reverts to Single with no adjustments.
- Step 3 (Dependents) reduces withholding dollar-for-dollar by claiming the Child Tax Credit ($2,000/child under 17) and Other Dependents Credit ($500).
- Step 4(b) lets you claim additional deductions (above the standard deduction) to reduce withholding further.
- Step 4(c) adds a flat extra dollar amount withheld per pay period — useful if you have freelance income or other untaxed sources.
Standard Deduction by Filing Status
These are the deduction amounts used in W-4 withholding calculations. They determine whether your income is high enough to owe tax at all.
| Filing Status | 2026 Standard Deduction | 2025 Standard Deduction |
|---|
Scenario: Claiming Exempt Status
Maria is a part-time student filing Single. In 2025 she earned $11,200 and owed no federal income tax. She expects to earn $13,500 in 2026 — still below the single standard deduction.
Because Maria had no tax liability in 2025 and expects none in 2026, she may write "Exempt" on Line 4(c) of her W-4. She must refile by February 15, 2026 to maintain exempt status.
Apply These Rules to Your Numbers
See how your W-4 withholding elections affect your true after-tax income.