State tax registration
Montana Payroll Tax Registration
Where to register, how long it takes, and what to send us.
State income tax withholding
Withholding account (TransAction Portal)
Montana Department of Revenue
- You'll receive:
- A Montana withholding Account ID once the Department of Revenue approves your registration. You'll also use it to set up your TransAction Portal login.
- Send Unify:
- Your withholding Account ID.
In the TransAction Portal, choose "Register for a new tax account" and pick Withholding.
Register for Withholding account (TransAction Portal) (opens in a new tab)State unemployment insurance
Unemployment insurance account (UI eServices for Employers)
Montana Department of Labor & Industry, UI Contributions Bureau
- You'll receive:
- A 7-digit UI account number. The 2026 new-employer rate depends on your industry (1.00% for most industries, 1.10% for services, 1.30% for agriculture and mining, 2.00% for construction), plus a 0.18% administrative fund tax, on the first $47,300 of wages.
- Send Unify:
- Your UI account number and your rate notice.
Questions about registering: the Registration Unit at 406-444-3834 (option 2).
Register for Unemployment insurance account (UI eServices for Employers) (opens in a new tab)All states
Last verified September 30, 2026. Broken link? Email support@unifypayroll.com.