How Idaho capital gains tax works
Idaho does not have a separate capital gains rate. Gains are taxed as ordinary income, stacking on top of your other earnings.
Because of that stacking, a large gain can push part of your income into a higher bracket, so the rate on the gain depends on your total income for the year.
Idaho taxes capital gains as ordinary income, with a deduction for certain Idaho property.
Short-term vs long-term gains
Federally, assets held longer than a year qualify for lower long-term rates. Most states, including Idaho, do not offer a separate long-term rate.
This calculator estimates the ID state tax by adding the gain to your other income and measuring the extra tax — your true marginal cost.
Lowering the bill
Holding assets longer, harvesting losses to offset gains, and spreading sales across tax years can all reduce what you owe.
Remember this shows Idaho state tax only; federal capital gains tax applies on top. Verify with the Idaho State Tax Commission (tax.idaho.gov).
Frequently asked questions
Does Idaho tax capital gains?
Yes — Idaho taxes capital gains as ordinary income, so the rate depends on your total income.
What is the capital gains tax rate in Idaho?
Gains are taxed at your Idaho income tax rate, up to 5.70%, since there is no separate capital gains rate.
Are long-term gains taxed lower in Idaho?
Idaho taxes capital gains as ordinary income, with a deduction for certain Idaho property.
Does this include federal capital gains tax?
No. This estimates the ID state tax only. Federal capital gains tax is separate and applies on top.