Form detail
IRS Form W-4
Employee's Withholding Certificate
Country
United States
Revision year
2024
Methods
paper
Updated
2026-05-20
Employee's Withholding Certificate
Used by employees to inform employers of withholding amounts.
Who must file: Every employee at the start of employment and any time the employee wishes to change their withholding.
Practical overview
Form W-4 was redesigned in 2020 to remove withholding allowances. The new format relies on dollar amounts for dependents, other income, and deductions. Multi-job households often under-withhold because each W-4 assumes the job is the only source; the Step 2 multiple-jobs worksheet or IRS estimator is required to avoid balance-due surprises.
Practical steps
- Complete Step 1 (filing status) on initial hire.
- Use the IRS Tax Withholding Estimator or Step 2 worksheet for multiple-job households.
- Report dependents in Step 3 to claim credit-based withholding adjustments.
- Resubmit any time circumstances change (marriage, additional job, dependents).
Due-date notes
On hire and any time the employee wishes to update withholding.
Timing: on-hire-or-update
Penalty snapshot
Submitting false information may result in penalties under Section 7205 or backup withholding requirements.
Related guides
Related citations
Computed from the cross-reference graph. Links open the related entity on this site.
Primary sources
- About Form W-4Verified 2026-05-20
Important disclaimer
This library is for general tax education only. Always verify filing obligations, due dates, and tax consequences against the cited primary source or with a qualified tax professional.