United States · 2025
Montana vs Idaho Income Tax 2025
At a $100K salary, Idaho is about $507 cheaper in 2025.
State brackets
4.7%
Bracket 1
$0to$21,100
5.9%
Bracket 2
$21,100and up
State brackets
0%
Bracket 1
$0to$4,811
5.3%
Bracket 2
$4,811and 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
Idaho tax
Difference
$50,000single filer
$5,63911.3% effective
$5,43210.9% effective
$207 lessin Idaho
$100,000single filer
$18,16718.2% effective
$17,65917.7% effective
$507 lessin Idaho
$200,000single filer
$47,68523.8% effective
$46,57723.3% effective
$1,107 lessin Idaho
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
ID
Idaho