Not on the inheritance itself: Idaho taxes neither the estate nor the beneficiaryNo state estate, inheritance, or gift tax. Idaho Code Title 14, ch. 4 (Estate and Transfer Tax Reform Act of 1988) was repealed in full by H.B. 381, 2020 Idaho Sess. Laws ch. 65 (eff. July 1, 2020); the estate tax had applied only to deaths before Jan. 1, 2005. Idaho State Tax Commission: "Idaho has no gift tax or inheritance tax, and its estate tax for deaths expired in 2004."Verified Sep 15, 2026View source, and the IRS does not treat an inheritance as income. What an heir can owe is income tax on withdrawals from an inherited retirement account, and capital gains on a later sale of inherited property, where the basis is reset to fair market value on the date of death26 USC § 1014Verified Sep 15, 2026View source and the gain faces ordinary income tax at the state's regular rates.

No. The IRS does not treat inherited money, real estate or personal items as income, so a beneficiary in Idaho does not report them on a federal return when received. Two exceptions: an inherited retirement account (a 401(k) or a traditional IRA) is taxed as ordinary income as it is withdrawn, and earnings after the date of death are taxable. Inherited property takes a stepped-up basis, its value on the date of death, for any later capital gain.

When someone dies, the cost basis of the property they leave is reset to its fair market value on the date of death26 USC § 1014Verified Sep 15, 2026View source under IRC § 1014. A later sale is taxed on the gain above that stepped-up basis, not above what the original owner paid, so the appreciation of the owner's lifetime is never taxed. The rule is federal and applies in Idaho as in every state.

Idaho intestacy law decides. As a community property stateIdaho Code § 15-2-102Verified Sep 10, 2026View source, Idaho distinguishes community property (acquired during the marriage) from separate property (owned before it, or received as a gift or inheritance), and the surviving spouse's share differs for each. The estate passes to the closest surviving relatives, in most cases the spouse and children first, then in order: Parents; Issue of parents; Grandparents and their issue; No escheat tierIdaho Code § 15-2-102Verified Sep 10, 2026View source.