United States · 2025
Idaho vs Illinois Income Tax 2025
At a $100K salary, Idaho is about $740 cheaper in 2025.
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
Idaho tax
Illinois tax
Difference
$50,000single filer
$5,43210.9% effective
$6,34712.7% effective
$915 lessin Idaho
$100,000single filer
$17,65917.7% effective
$18,39918.4% effective
$740 lessin Idaho
$200,000single filer
$46,57723.3% effective
$46,96723.5% effective
$390 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+
ID
Idaho
IL
Illinois