United States · 2025
South Dakota vs Alaska Income Tax 2025
At a $100K salary, South Dakota and Alaska pay roughly the same income tax in 2025.
NO STATEIncome tax
South Dakota levies no state income tax for 2025. Only federal income tax applies.
NO STATEIncome tax
Alaska levies no state income tax for 2025. Only federal income tax applies.
At common incomes, what's the tax difference?
Federal + state income tax after standard deductions, 2025. Excludes FICA.Compare your income
$
We'll pin your result at the top.Income
South Dakota tax
Alaska tax
Difference
$50,000single filer
$3,8727.7% effective
$3,8727.7% effective
≈ even
$100,000single filer
$13,44913.4% effective
$13,44913.4% effective
≈ even
$200,000single filer
$37,06718.5% effective
$37,06718.5% effective
≈ even
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%
$626,350+
SD
South Dakota
AK
Alaska