Rob Hartley

Founder, AppealDesk · March 27, 2026

Montana Property Tax Law Changes 2026: What Homeowners Need to Know

Updated March 2026

Montana Property Tax Snapshot: 2026

• Median home value: $263,100
• Average annual tax: $2,210
• Effective tax rate: 0.84%
• Assessment ratio: 100% of market value
• Reassessment cycle: biennial

Assessment Surge and Legislative Response

Montana's housing market saw explosive growth (40%+ in some areas from 2020-2023), causing dramatic property tax increases. In response, the legislature enacted phase-in provisions that spread large assessment increases over the 2-year reassessment cycle rather than implementing them all at once. Despite this, many homeowners saw substantial increases. If your assessment exceeds current market value, you have strong grounds to appeal.

Biennial Reassessment

Montana reassesses property every 2 years using a market-based approach. The Montana Department of Revenue handles all assessments statewide (unusual -- most states delegate to counties). This means assessment quality and methodology are consistent across the state, but also means you appeal through the county Tax Appeal Board, not the state.

Property Tax Assistance Program (PTAP)

PTAP reduces the tax rate applied to your property (not the assessed value) for qualifying homeowners:

• Age 62+ or disabled
• Income under approximately $45,000
• Reduces the residential tax rate from 1.35% to a lower percentage based on income
• Apply through the Montana Department of Revenue

No Sales Tax Offset

Montana has no sales tax, which means property taxes and income taxes carry more of the revenue burden. This political dynamic affects how aggressively the legislature can reform property taxes -- any reduction needs alternative revenue.

Disabled Veteran Exemption

Montana exempts the first $200,000 of market value for 100% disabled veterans. Partial exemptions are available for lower disability ratings. This is one of the more generous veteran exemptions in the country.

Montana Appeal Process

• Filing deadline: 30 days from classification and appraisal notice
• File with: County Tax Appeal Board
• Evidence needed: Comparable sales, property condition photos, record corrections

2026 Action Checklist

1. Review your assessment notice when it arrives
2. Verify all exemptions are applied (homestead, senior, veteran)
3. Compare your assessed value to recent comparable sales
4. File your appeal by 30 days from classification and appraisal notice if over-assessed
5. Check your property record for errors (square footage, features, classification)