How much Idaho tax will I owe on a capital gain?

Estimate Idaho tax on a capital gain for 2025 or 2026 by entering gain amount, holding period, and residency allocation. Idaho generally taxes gains as ordinary income, so the tool applies Idaho rates to estimate the state tax impact.

How this calculation works

Applies Idaho income tax rates to the gain amount.
Adjusts for residency allocation when applicable.
Summarizes estimated tax and effective rate on the gain.

Common mistakes and caveats

Loss carryovers and special exclusions are not modeled.
Local taxes are not included.
Final treatment depends on your full Idaho return.

FAQ

Does Idaho have a special long-term capital gains rate?

Idaho generally taxes capital gains as ordinary income.

Last updated & sources

Last updated January 27, 2026.

Idaho State Tax Commission
Idaho Individual Income Tax

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