Tax rates range from 1% to 6.9% for individuals with the highest bracket coming in at $15,600. Standard deductions are $4,200 single, or double that for married couples. An exemption of $2,140 per person is given. All retirement income is taxable. There is no sales tax or estate tax.
Corporate tax rates are 6.75%. Personal service businesses, contractors, and lodging facilities have additional income taxes levied on them. More tax information can be found at: http://revenue.mt.gov/