Property Valuation Changes 1 In accordance with 15-7-111, MCA, MONTANA DEPARTMENT OF the department has made the consumer price index REVENUE and growth rates of Montana Personal Income and the estimated annualized change in property taxes levied in the last 10 years available on our website. For the complete report or information by county, please visit www.MTRevenue.gov/2022PropertyValueChanges Property Valuation Changes 1 In accordance with 15-7-111 , MCA , MONTANA DEPARTMENT OF the department has made the consumer price index REVENUE and growth rates of Montana Personal Income and the estimated annualized change in property taxes levied in the last 10 years available on our website . For the complete report or information by county , please visit www.MTRevenue.gov/2022PropertyValueChanges