Montana - W2 State Filing Requirements

The state requires the filing of Form W-2 if wages were paid to Montana employees or if income tax was withheld during the year. 

Montana State ID Format:
 

• 10 digits and a hyphen followed by 3 constants (Eg: 9999999999-WTH) 

• 7 digits and a hyphen followed by 3 digits and a hyphen followed by 3 constants (Eg: 9999999-999-WTH)

Filing Criteria and Requirements

Criteria 1: If there is any Montana state tax withheld

• Filing Method: Direct State Filing

  • You must file a W-2 directly with the state.

• Additional Form Required: Form MW-3 

• Deadline: January 31, 2025

Criteria 2: If there is no Montana state tax withheld

• Filing Method: Direct State Filing

  • You must file a W-2 directly with the state

• Additional Form Required: Not required

• Deadline: January 31, 2025

For more information about Montana’s W2 filing requirements, click here