Estate Planning in Idaho

Idaho operates under community property law, one of only nine states to do so. Most assets acquired during marriage belong equally to both spouses regardless of whose name is on the title or who earned the income. This fundamental difference from common law states shapes every aspect of estate planning here, from how property passes at death to what a surviving spouse automatically inherits.

Like all states, Idaho recognizes formally executed wills and living trusts as valid estate planning tools. A standard will here requires 2Idaho Code § 15-2-502Verified Oct 18, 2026View source adult witnesses, and adding a notarized self-proving affidavit can streamline the probate process later. The state also recognizes holographic (handwritten) wills, though these have stricter proof requirements and are more vulnerable to legal challenges.

An Idaho healthcare power of attorney is complete with the principal's signature: the statute requires neither witnesses nor a notaryIdaho Code § 39-4510Verified Oct 15, 2026View source. The agent must be at least 18 yearsIdaho Code § 39-4510Verified Oct 15, 2026View source old.

An Idaho financial power of attorney requires neither witnesses nor notarization to be validIdaho Code § 15-12-101, § 15-12-104, § 15-12-105, § 15-12-106, § 15-12-107, § 15-12-109, § 15-12-113, § 15-12-119, § 15-12-120, § 15-12-201, § 15-12-301, § 15-12-302; Idaho Code § 55-805, § 55-806Verified Oct 21, 2026View source. A notarized signature carries a statutory presumption that it is genuineIdaho Code § 15-12-101, § 15-12-104, § 15-12-105, § 15-12-106, § 15-12-107, § 15-12-109, § 15-12-113, § 15-12-119, § 15-12-120, § 15-12-201, § 15-12-301, § 15-12-302; Idaho Code § 55-805, § 55-806Verified Oct 21, 2026View source. The document is durable by defaultIdaho Code § 15-12-101, § 15-12-104, § 15-12-105, § 15-12-106, § 15-12-107, § 15-12-109, § 15-12-113, § 15-12-119, § 15-12-120, § 15-12-201, § 15-12-301, § 15-12-302; Idaho Code § 55-805, § 55-806Verified Sep 18, 2026View source: it stays in effect if the principal becomes incapacitated. A springing power of attorney, one that takes effect only when the principal becomes incapacitated, is permittedIdaho Code § 15-12-101, § 15-12-104, § 15-12-105, § 15-12-106, § 15-12-107, § 15-12-109, § 15-12-113, § 15-12-119, § 15-12-120, § 15-12-201, § 15-12-301, § 15-12-302; Idaho Code § 55-805, § 55-806Verified Sep 18, 2026View source.

Idaho does not impose a state estate tax or inheritance tax, which means estates are only subject to the federal estate tax (currently exempting the first $15,000,00026 USC 2001(c), 2010; P.L. 119-21 §70106Verified Sep 15, 2026View source per person, or $30,000,00026 USC 2001(c), 2010; P.L. 119-21 §70106Verified Sep 15, 2026View source for married couples using portability). This is a meaningful advantage over the states that layer their own death taxes on top of the federal system.

Idaho does not require a revocable living trust to be notarizedIdaho Code §§ 15-7-101 to 15-7-701 (UPC Trust Administration); Idaho Code §§ 68-104 to 68-113 (Uniform Trustees' Powers Act); Idaho Code § 32-906A (community property in revocable trusts)Verified Oct 17, 2026View source. Idaho does not allow transfer-on-death deeds for real estate. Without this option, real property must pass through probate or be held in a trust to avoid court proceedings. Transferring property into a revocable trust does not trigger a property tax reassessment in Idaho, so property taxes remain at their current level.

Idaho automatically revokes an ex-spouse as beneficiary on life insurance, retirement accounts, and similar designations upon divorce. However, these automatic revocations can be overridden by a divorce decree or by re-designating the ex-spouse after the divorce.

Idaho fully authorizes remote online notarization (RON) for estate planning documents, including wills, trusts, healthcare directives, powers of attorney. RON covers the notarization step; whether the whole signing can happen remotely also depends on whether the document's witnesses may attend by video.