2024 Montana Tax Rate Table. Montana has a graduated state individual income tax, with rates ranging from 4.70 percent to 5.90 percent. The guide includes information about montana filing requirements and instructions for filing the returns with us, including how to file using the transaction.
121, enacted in march 2023, simplified the individual income tax system in montana and, effective january 1, 2024, reduced the number of tax brackets from seven to two. Use our income tax calculator to find out what your take home pay will be in montana for the tax year.