Big changes coming to Montana’s income tax structure

With the new year approaching, big changes are coming to Montana’s income tax system.

Back in 2021, the Montana Legislature approved a major overhaul to the state income tax structure, with the most significant adjustments set to take effect at the start of 2024. You won’t see the changes when you file your income tax return in the coming months, but they’ll be very noticeable the following year.

Senate Bill 399, sponsored by Sen. Greg Hertz, R-Polson, makes a wide range of reforms – including to who has to file income tax returns, how they’ll file and the rates they’ll pay. Supporters said the goal of the law is to simplify income taxes in the state.

Jonathon Ambarian