United States · 2025
Montana vs Illinois Income Tax 2025
At a $100K salary, Montana is about $232 cheaper in 2025.
State brackets
4.7%
Bracket 1
$0to$21,100
5.9%
Bracket 2
$21,100and up
State brackets
4.95%
Bracket 1
$0and up
At common incomes, what's the tax difference?
Federal + state income tax after the standard deduction, 2025. Excludes FICA.Compare your income
$
We'll pin your result at the top.Income
Montana tax
Illinois tax
Difference
$50,000single filer
$5,63911.3% effective
$6,34712.7% effective
$707 lessin Montana
$100,000single filer
$18,16718.2% effective
$18,39918.4% effective
$232 lessin Montana
$200,000single filer
$47,68523.8% effective
$46,96723.5% effective
$718 lessin Illinois
Federal income tax — same for both
7 brackets · 10–37% · applies on top of state rates
10%
to $11,925
12%
to $48,475
22%
to $103,350
24%
to $197,300
32%
to $250,525
35%
to $626,350
37%
$626,351+
MT
Montana
IL
Illinois