Lower residential, commercial, and agricultural property tax rates

SB 189 lowers property tax rates for specific categories in Montana. It reduces the tax rate for Class Three agricultural land from 2.16% to 1.85% of its agricultural value, and cuts the standard residential tax rate from 1.35% to 0.76% of market value (with a reduced rate for homes over $1.5 million). Commercial property tax rates also decrease, from a previous 1.4x multiplier to 1.35% of market value. The bill applies retroactively to 2025 tax years, meaning affected property owners may receive refunds for past taxes paid under the higher rates. It directly impacts Montana landowners with agricultural properties, residential homes (especially higher-value ones), and commercial properties.