United States · 2026
Idaho vs Illinois Income Tax 2026
At a $100K salary, Idaho and Illinois pay roughly the same income tax in 2026.
At common incomes, what's the tax difference?
Federal + state income tax after the standard deduction, 2026. Excludes FICA.Compare your income
$
We'll pin your result at the top.Income
Idaho tax
Illinois tax
Difference
$50,000single filer
$6,21512.4% effective
$6,29512.6% effective
≈ even
$100,000single filer
$18,21518.2% effective
$18,12018.1% effective
≈ even
$200,000single filer
$47,07923.5% effective
$46,63423.3% effective
$445 lessin Illinois
Federal income tax — same for both
7 brackets · 10–37% · applies on top of state rates
10%
to $12,400
12%
to $50,400
22%
to $105,700
24%
to $201,775
32%
to $256,225
35%
to $640,600
37%
$640,601+
ID
Idaho
IL
Illinois