HB 337 reduces income taxes by expanding the range of the lower income tax bracket upward and decreasing the top bracket’s rate. CPAC believes that Montanans should be able to retain more of their hard-earned money, so it supports this bill. HB 337 was passed by the Montana Senate in a 34-16 vote on April 22, 2025, and Governor Greg Gianforte signed the measure into law.