How to Appeal Your Property Tax in Montana

Montana homeowners can appeal their property tax assessment if they believe it's too high. This guide covers the 2026 appeal deadline, required evidence, and step-by-step process.

How Montana Assesses Property

100%of market value

Montana assesses residential property at 100% of market value.

Montana assesses property at 100% of market value, then applies a class-specific tax rate.

Residential property in Montana — understanding the appeal process

The Appeal Process

Appeals are heard by the County Tax Appeal Board. An informal review is available before filing a formal appeal.

1

Department of Revenue (Informal)

2

County Tax Appeal Board

3

State Tax Appeal Board

4

District Court

Montana Appeal Deadline

30 days from notice

Typical window: June - August

See all 50 state deadlines for 2026

What Overassessment Costs Montana Homeowners

The median home in Montana is worth $330,000. If your assessment is just 10% too high, you may be overpaying:

~$244/year

Effective tax rate: 0.74% · Median value: $330,000

Check Your Montana Assessment

Enter your address to see your estimated overassessment and Montana filing deadline.

✓ All 50 states✓ Instant results✓ $49 flat fee

Montana Counties

Guides & Resources

Property Tax Appeal Resources

Frequently Asked Questions

How do I appeal my property tax in Montana?
In Montana, you file a appeal with the County Tax Appeal Board. An informal review is available before filing a formal appeal. The process has 4 levels: Department of Revenue (Informal), County Tax Appeal Board, State Tax Appeal Board, District Court.
When can I appeal my property tax in Montana?
30 days from notice The typical window is June - August.
What is Montana's property tax assessment ratio?
Montana assesses residential property at 100% of market value. Montana assesses property at 100% of market value, then applies a class-specific tax rate.
How much can I save by appealing in Montana?
The median home in Montana is worth $330,000. If your assessment is 10% too high, you may be overpaying approximately $244 per year.