Employees must complete a new form if their filing status changes or to adjust the amount of withholding.
Additional: if you expect to have a balance due on your tax return, you may request your employer to withhold an additional amount of tax from each pay period.
Reduced withholding: if you designate an amount that is too low, it could result in you being under withheld.
Notice to employer: within 20 days of hiring a new employee, a copy of the Form MO W-4 must be submitted by email, fax or mail.
Each year: consider completing a new Form MO W-4 each year and when your personal or financial situation changes.
| Question | Answer |
|---|---|
| Form Name | Form MO W-4 |
| Form Length | 1 page |
| Fillable? | Yes |
| Fillable fields | 29 |
| Avg. time to fill out | 5 min |
| Edition | Revised 12-2024 |
| Where to send | Return the completed form to your employer |
| Other names | MO W-4, MO W4, Form MO W-4, Missouri W-4, Employee's Withholding Certificate |
| Official source | Form MO W-4 (Rev 12-2024), Missouri Department of Revenue |
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