Montana | Personal Tax Extension | Form IT | Montana Individual Income Tax Payment Voucher

Modified on Thu, 16 Jan at 12:04 PM

State Abbreviation	MT
State Name	Montana
Extension Status	Approved Automatically
Return Due Date	April 15, 2025
Extended Due Date	October 15, 2025
Other Information	Montana provides an automatic extension to October 15th. To avoid late payment penalties, 90% of the outstanding current year tax liability or 100% of the previous year's tax liability must be paid by April 15th, 2025.
Online Payment	Montana \| Online Tax Extension Payment
Payment Voucher Title	Form IT \| Montana Individual Income Tax Payment Voucher
State Payment Agency	Montana Department of Revenue
Mailing Address with Payment	Montana Department of Revenue P.O. Box 6309 Helena, MT 59604-6309
Online Payment Options \| Credit Card	Use the TransAction Portal (TAP) at https://tap.dor.mt.gov. There is a fee when paying with a credit or debit card
Online Payment Options \| ACH Debit	Use the TransAction Portal (TAP) at https://tap.dor.mt.gov. There is a fee when paying with a credit or debit card
Failure to File Penalties	Lesser of $50 or the amount of tax due.
Failure to Pay Penalties	1.2% of unpaid tax per month, up to 12%.