Appealing Your Property Tax Assessment in Montana
Deadlines and steps to appeal a property tax assessment in Montana, and when property taxes are due.
Short answer: File a Request for Informal Classification and Appraisal Review (Form AB-26) with the Department of Revenue within 30 days of the date on your classification and appraisal notice (for the 2025-2026 cycle, a late request could be made through June 1, 2026, affecting tax year 2026 only). Montana Dept. of Revenue, Informal Review and Formal Appeal Process
| Appealing your assessment | File a Request for Informal Classification and Appraisal Review (Form AB-26) with the Department of Revenue within 30 days of the date on your classification and appraisal notice (for the 2025-2026 cycle, a late request could be made through June 1, 2026, affecting tax year 2026 only). Or appeal directly to the County Tax Appeal Board by submitting the appeal to the county clerk and recorder within 30 days of the notice date. After an AB-26 decision, you may appeal to the County Tax Appeal Board, then to the Montana Tax Appeal Board, whose decisions are final unless taken to district court. |
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More Montana property tax & homestead exemptions
- The Homestead Exemption in Montana
- Senior, Veteran and Disability Property Tax Relief in Montana
- All Montana property tax & homestead exemptions rules
FAQ
How do you appeal a property tax assessment in Montana?
File a Request for Informal Classification and Appraisal Review (Form AB-26) with the Department of Revenue within 30 days of the date on your classification and appraisal notice (for the 2025-2026 cycle, a late request could be made through June 1, 2026, affecting tax year 2026 only). Or appeal directly to the County Tax Appeal Board by submitting the appeal to the county clerk and recorder within 30 days of the notice date. After an AB-26 decision, you may appeal to the County Tax Appeal Board, then to the Montana Tax Appeal Board, whose decisions are final unless taken to district court.
General legal information, not legal advice. Laws change and local rules can differ; check the linked official source or talk to a lawyer about your situation.