Montana Property Tax Appeal Guide
How to challenge your property tax assessment in Montana - deadlines, process, and a savings calculator.
What This Data Tells Us About Appeals in Montana
- Administrative filing in Montana is listed at $0, so the first barrier is evidence and timing, not a petition fee.
- This ACS extract does not store how often Montana assessments are reduced on appeal; comparable sales and property-record errors are the evidence the named board typically asks for.
- The typical window centers on June; confirm the current county notice date before relying on the statewide summary. Compare Colorado's June window before assuming Montana is early or late.
Primary signal
The administrative filing is usually free
File with the County Tax Appeal Board. The reported filing-fee structure is $0; later court or tribunal stages may use a different schedule.
Decision signal 2
Montana's process has its own procedural details
Montana reassesses residential property every two years. The state Department of Revenue (not local assessors) handles assessments.
Decision signal 3
This extract does not store an appeal-win rate
The ACS county medians on this site do not include how often Montana assessments are reduced on appeal. Recent comparable sales and documented property-record errors are the evidence boards typically ask for.
Decision signal 4
The filing window centers on June
Within 30 days of the appraisal notice. Deadlines can vary by county and assessment cycle, so confirm the current date with the local assessor before relying on this guide.
How to read this guide and disclaimer
Use the ranked signals above as a preparation order, not as a forecast. Start with the filing window and named appeal body because a strong valuation argument cannot cure a missed deadline or a filing sent to the wrong office. Then compare the assessment with recent, genuinely similar properties and document factual errors such as incorrect square footage, condition, or classification.
An estimated success rate is not part of this ACS extract. Keep copies of the assessment notice, evidence, forms, delivery confirmation, and every response from the taxing authority. If a state rule and a county instruction differ, follow the current instruction issued by the office that will hear the appeal.
This guide is for informational purposes only and is not legal or tax advice. Deadlines, filing fees, and procedures vary by county within Montana and can change year to year. Always verify the current rules with your local assessor's office, or a licensed attorney or tax professional, before filing. Source: Montana Department of Revenue.
Appeal calendars beside Montana
Other state boards, not geography. Use them to see whether Montana's June window is unusual; start with Colorado and Idaho.
| Peer state | Typical month | Filing fee |
|---|---|---|
| Colorado Also open Colorado appeal steps | June | $0 |
| Idaho Also open Idaho appeal steps | June | $0 |
| Indiana Also open Indiana appeal steps | June | $0 |
| Nebraska Also open Nebraska appeal steps | June | $0 |
| North Carolina Also open North Carolina appeal steps | June | $0 |
Appeal Deadline
Within 30 days of the appraisal notice
Appeal Body: County Tax Appeal Board
Step-by-Step Appeal Process
- 1
Review your appraisal notice from the Montana Department of Revenue
- 2
File an appeal with the County Tax Appeal Board within 30 days
- 3
Attend the County Board hearing
- 4
If denied, appeal to the Montana Tax Appeal Board within 30 days of the County Board decision
Montana-Specific Notes
Montana reassesses residential property every two years. The state Department of Revenue (not local assessors) handles assessments.
Source: Montana Department of Revenue
Estimate appeal savings
After you have Montana's deadline (June) and filing route (County Tax Appeal Board), project annual savings if an assessment cut sticks. The shared estimator lives on one tools URL so each state page keeps its own process facts instead of reprinting the same form.
Open appeal savings estimator →