"Montana's 2010 state-level individual income tax collections were $724 per person, which ranked 27th highest nationally. "
There's also an implicit "Mountain Tax" that keeps wages and salaries low.
Montana without a sales tax is in the bottom half of individual income tax collections not bad. If you are over 62 you get a thousand buck rebate on your property taxes.
I'm just pointing this out...would not want to give anyone a reason to move here..its to cold, no jobs, and packed to the gills with out of staters.