Idaho Wills, Trusts & Estate Planning

By Ronald W. Brilliant, Attorney at Law · Licensed in Idaho, Nevada & California · Last reviewed: September 2026

Estate planning is how you make sure the people you care about are provided for, and that the right people can step in if you cannot act for yourself. This guide explains how wills, trusts, and probate work under Idaho law, which follows the Uniform Probate Code.

The Core Estate Planning Documents

Will: names who receives your property, who will serve as your personal representative (executor), and who will care for minor children.
Revocable living trust: holds your assets during your life and passes them to your beneficiaries at death, usually without probate.
Durable power of attorney: lets someone you trust manage your finances if you become unable to.
Health care directive: states your medical wishes and names someone to make health care decisions for you.
Beneficiary designations: retirement accounts, life insurance, and payable-on-death accounts pass by beneficiary form, not by your will, so they must be coordinated with the rest of your plan.

A plan that works is one where all of these pieces point in the same direction. Many problems I see in Idaho estates come from outdated beneficiary forms or assets that were never moved into a trust.

Making a Valid Will in Idaho

An Idaho will must be in writing, signed by you (or by someone else in your presence and at your direction), and signed by at least two witnesses who saw you sign or acknowledge the will (Idaho Code § 15-2-502). Adding a self-proving affidavit, signed before a notary, makes the will easier to prove in probate.

Idaho also recognizes holographic wills: a will is valid without witnesses if the signature and the material provisions are in your own handwriting (Idaho Code § 15-2-503). Handwritten wills are often ambiguous or incomplete, though, and are a frequent source of disputes.

Will or Living Trust?

A will is simpler and less expensive to prepare, but assets that pass under a will generally go through probate. A revocable living trust costs more up front but can avoid probate, keep your affairs private, and make it easier to manage property if you become incapacitated. Which is right depends on your assets, your family, and where your property is located. Owning real estate in more than one state is a common reason to use a trust, because it can avoid separate probate cases in each state.

Probate in Idaho

Idaho uses the Uniform Probate Code, which makes probate comparatively streamlined. Many estates can proceed through informal probate, with limited court supervision, when there is no dispute. A personal representative is appointed, notifies creditors and heirs, pays debts and expenses, and distributes the remaining property. For a step-by-step walkthrough with deadlines and Idaho Code citations, see my Idaho probate guide.

Small Estates in Idaho

If the probate estate (excluding assets that pass outside probate) is worth $100,000 or less after liens and encumbrances, heirs may be able to collect personal property with a small estate affidavit, without opening a probate case, once 30 days have passed since the death (Idaho Code § 15-3-1201). See Idaho small estate options for the details.

What Happens If You Die Without a Will

If you die without a will, Idaho law decides who inherits your property through a process called intestate succession. Because Idaho is a community property state, your spouse generally receives your share of community property, while separate property may be divided among your spouse, children, parents, or siblings depending on who survives you. The result may not match what you would have wanted, and the court, not you, chooses who administers your estate.

Estate and Inheritance Taxes

Idaho, Nevada, and California do not impose a state estate tax or inheritance tax. The federal estate tax applies only to very large estates, above a high per-person exemption amount that is adjusted by law. For most families, planning focuses on avoiding probate, protecting beneficiaries, and minimizing conflict rather than on estate tax.

Planning Through a Litigator’s Lens

I also handle probate and trust disputes, so I draft estate plans with an eye toward what causes families to end up in court: unclear language, outdated documents, and assets that do not match the plan. If a dispute has already started, see my Probate & Estate Litigation practice.

How I Can Help

I prepare wills, living trusts, powers of attorney, and health care directives for individuals and families in Idaho, and I guide personal representatives and trustees through probate and trust administration. Request a consultation to talk about your plan.

This page provides general information about Idaho law and is not legal advice. Dollar thresholds change periodically; verify current figures for your situation. Reading this page does not create an attorney-client relationship.