Idaho Estate Planning Basics

Idaho estate planning comes down to four documents. A will says who inherits and who raises your children. A durable power of attorney covers your money while you are alive but unable to act. An advance care planning document covers your medical care in the same situation. A living trust is optional and sits on top of the other three.

Idaho differs from its neighbors in three ways that change the plan itself. It is a community property state, so your will reaches only your share of what you and your spouse built together. It has no transfer on death deed for real estate, so the house needs a different route around probate. And since 2023 it uses one health care document where most states still use two.

This guide is the map. Each section states the Idaho signing rule, cites the section of the Idaho Code that sets it, and points at the deeper guide.

The Four Documents At A Glance

Document	What it controls	When it works	Idaho signing rule
Will	Who inherits probate property, who serves as personal representative, who you nominate as guardian for minor children	After death	Writing, your signature, and two witnesses who saw you sign or acknowledge (15-2-502), or a handwritten will (15-2-503)
Durable power of attorney	Money, accounts, real estate, bills	While you are alive	Your signature; a notary's acknowledgment makes the signature presumed genuine (15-12-105)
Advance care planning document	Medical decisions, treatment preferences, an optional health care agent	While you are alive	Your name, date of birth, phone, mailing address, signature, and date; witnesses and a notary optional (39-4510)
Revocable living trust	Only the assets you retitle into it	While alive and after death	No statutory revocability default in Idaho; write the power to revoke into the document

1. An Idaho Will

Who can sign one. Idaho Code 15-2-501 lets any emancipated minor, or any person 18 or older who is of sound mind, make a will.

How you sign it. Idaho Code 15-2-502 asks for three things. The will is in writing. You sign it, or someone else signs your name in your presence and at your direction. Then at least two persons sign, each of whom witnessed either your signing or your acknowledgment of the signature or of the will. The section names no notary. Idaho Code 15-2-505 lets anyone 18 or older who is generally competent to be a witness serve, and a will is not invalid because an interested witness signed it.

Handwritten wills count. Under Idaho Code 15-2-503, a will that fails the witness rule is still valid as a holographic will, whether or not witnessed, if the signature and the material provisions are in your handwriting.

Make it self-proved. Idaho Code 15-2-504 lets you and your witnesses sign sworn statements before an officer authorized to administer oaths, either at signing or later. That spares your family from tracking the witnesses down after your death.

Electronic wills and the registry. Idaho adopted the Uniform Electronic Wills Act in 2023. Idaho Code 15-2-1105 requires a tamper-evident electronic record, your signature, and two witnesses who each reside in a state and sign in your physical or electronic presence. Separately, Idaho Code 15-2-1001 runs a will registry at the Secretary of State for a $10 fee. It records where your will is kept. Skipping it does not affect the will's validity.

Divorce rewrites it for you. Under Idaho Code 15-2-508, a divorce or annulment revokes gifts to the former spouse and any nomination of the former spouse as executor, trustee, conservator, or guardian, unless the will expressly says otherwise.

The full picture, including witness mechanics and how an Idaho court proves a will, is in what makes an Idaho will valid.

Your Will Reaches Your Half Of The Community Property

This is the Idaho rule most out of state articles skip. Idaho Code 32-906(1) makes property acquired after marriage by either spouse community property. The same subsection makes the income from separate property community too, unless the conveyance or a written agreement between the spouses says otherwise.

At death, the Idaho intestacy statute speaks of "the one-half (1/2) of community property which belongs to the decedent" (Idaho Code 15-2-102(b)). Your spouse already owns the other half. So before you decide who gets what, sort your assets into separate and community, because the answer sets how much your will can move. Idaho community property walks through the classification.

2. A Durable Power Of Attorney

This document names an agent to handle money and property while you are alive. Idaho adopted the Uniform Power of Attorney Act in 2008 at Title 15, Chapter 12, with one rule that runs the opposite way from the uniform text.

It is durable by default. Idaho Code 15-12-104 says a power of attorney created under the chapter is durable unless it expressly provides that it is terminated by the incapacity of the principal.

The notary is a presumption, not a condition. Idaho Code 15-12-105 requires your signature, or the signature of someone you direct to sign your name in your conscious presence. Your signature is presumed genuine if you acknowledge it before a notary public or other individual authorized to take acknowledgments. Sign before a notary anyway. A bank or title company will ask for it.

A conservator ends it. Under Idaho Code 15-12-108(2), if a court later appoints a conservator or other fiduciary over your property, your power of attorney "is terminated unless otherwise ordered by the court." Subsection (1) lets you nominate a conservator in the document itself, which is your best protection against a stranger taking over. A 2026 act rewrote the section's cross reference effective January 1, 2027, and the termination sentence stays the same in both versions.

It ends at death. Idaho Code 15-12-110(1)(a) ends a power of attorney when the principal dies. From then on, a personal representative appointed in the probate case handles the estate. Subsection (2)(c) also ends a spouse agent's authority when a divorce, annulment, or legal separation action is filed, unless the document says otherwise.

Idaho Code 15-12-301 prints a statutory form you can use. See a durable power of attorney for the powers that need an express grant, and the national power of attorney overview for how the document types compare.

3. An Advance Care Planning Document

Idaho replaced its living will and its durable power of attorney for health care with one document in 2023.

What it must contain. Idaho Code 39-4510(1) lets any competent person 18 or older execute an advance care planning document. To be valid, it must include your name, date of birth, telephone number, and mailing address; your signature or the signature of your authorized agent; and the date you signed. Blanks you leave are "deemed intentional" and do not invalidate the document.

What it may contain. Subsection (2) lists the optional pieces: nomination of one or more health care agents, resuscitation instructions, pregnancy instructions, HIPAA release instructions, end-of-life care instructions, treatment objectives, witnesses, and notarization. A form that tells you two witnesses are required is describing the old law or another state's.

How long it lasts. Idaho Code 39-4512 makes the document effective from the date you sign it until you revoke or replace it.

Register it. Idaho Code 39-4515 has the Department of Health and Welfare keep a health care directive registry, open around the clock, with a filing fee capped at $10 and no fee to revoke.

If you sign nothing. Idaho Code 39-4504(1) sets the order of who may consent for you: a court-appointed guardian, then the health care agent in your advance care planning document, then your spouse, then an adult child, then a parent, then a person named in a delegation of parental authority, then any relative, then any other competent individual responsible for your care. The ladder picks a person by category. It does not know what you would have wanted.

The advance care planning document guide covers the Department of Health and Welfare's optional form and the registry steps.

4. A Trust, When It Earns Its Place

A trust is an add-on, not a replacement. Idaho never adopted the Uniform Trust Code. Its trust law is the older Uniform Probate Code article at Title 15, Chapter 7, so a Uniform Trust Code section number from another state's article does not apply here.

Write in the power to revoke. No Idaho section makes a trust revocable unless its terms say otherwise. State plainly in the document that you may revoke or amend it, and how.

Registration is a trustee duty. Idaho Code 15-7-101 tells the trustee of a trust administered in Idaho to register it in the court at the principal place of administration. Under Idaho Code 15-7-104, a trustee who ignores a written demand to register for 30 days faces removal, denial of compensation, or surcharge, and a trust provision excusing registration is ineffective.

The pour-over will. Idaho Code 15-2-511 lets your will add property to a trust, even one you can amend or revoke. Under subsection (3), revoking the trust before death causes that gift to lapse unless the will provides otherwise.

A trust does not hide assets from creditors. Idaho Code 15-6-107 makes the transferee of a revocable transfer at death, a living trust included, liable to the probate estate for allowed claims and statutory allowances to a surviving spouse and children when the probate estate cannot pay them. A proceeding under the section must start within two years after the death.

A trust also controls only what you retitle into it. Read whether you need an Idaho trust for the funding steps, and will vs trust for the national comparison. For a pet, Idaho Code 15-7-601 allows a purpose trust that needs no human beneficiary; see providing for a pet.

Naming A Guardian For Minor Children

A will is the usual place to say who raises your children. Under the version of Idaho Code 15-5-202 in force until January 1, 2027, a parent may appoint a guardian of an unmarried minor by will, and may name alternates in order of priority. The appointment takes effect when the guardian files an acceptance in the court where the will is probated, if no parent with the right to appoint was alive at the death. If the named guardian does not accept within 30 days after the will is probated, the next alternate may.

Watch the date. 2026 Idaho Session Laws chapter 79 repeals and replaces Title 15, Chapter 5 with the Uniform Guardianship, Conservatorship, and Other Protective Arrangements Act on January 1, 2027, and the section numbers move. Read naming a guardian for which text governs on which date.

The House Needs Its Own Plan

Idaho has no transfer on death deed for real estate. Title 15, Chapter 6, the nonprobate transfers chapter, has four parts: multiple-party accounts, provisions relating to effect of death, transfer on death security registration, and community property with right of survivorship. None covers a deed that passes land at death to a named beneficiary. A 2026 bill to add one was referred to committee and did not become law.

Married couples have a substitute. Idaho Code 15-6-401 makes real property held as community property with right of survivorship belong to the surviving spouse at the first death, but only when the deed expressly declares that estate. Everyone else is left with a funded revocable trust or joint ownership. See keeping assets out of probate for the tradeoffs.

What Idaho Decides If You Sign Nothing

Skipping the documents just means Idaho's defaults apply.

Your property. Idaho Code 15-2-102 sends your half of the community property to your spouse and splits your separate property by fixed fractions with no dollar figure. See Idaho intestate succession.
Your medical care. The 39-4504 ladder picks a decision maker by relationship.
Your money during incapacity. With no power of attorney, someone asks the court to appoint a conservator, with a petition, a hearing, and ongoing reports.
Your children. With no nomination in a will, the court chooses.
Your estate's manager. The court appoints a personal representative under the priority rules. Idaho executor duties covers that job, and the Idaho probate guide walks the case.

Idaho Charges No Estate, Inheritance, Or Gift Tax

The Idaho State Tax Commission's estates page says it in one sentence: "Idaho has no gift tax or inheritance tax, and its estate tax for deaths expired in 2004." The federal estate tax still exists and reaches only very large estates. Idaho federal estate tax has the current threshold.

A Small Estate Is Still Worth Planning

People use Idaho's affidavit route as a reason to sign nothing. Look at what it does. Idaho Code 15-3-1201 lets a successor collect by affidavit 30 days after death when the fair market value of the entire probate estate, wherever located, less liens and encumbrances, does not exceed $100,000. The affidavit moves debts owed to the decedent, tangible personal property, and instruments such as stock. It does not move land, while the land still counts toward the $100,000. See the Idaho small estate affidavit for the full test.

Where To Start

List what you own and how it is titled. Mark each asset separate or community. Joint accounts, retirement plans, and life insurance pass by their own rules.
Decide the four people. Who inherits, who serves as personal representative, who handles your money during incapacity, and who makes your medical calls.
Check your beneficiary designations. Retirement accounts and insurance policies follow the form on file, not your will.
Sign the three documents to Idaho's rules. Two witnesses for the will, a notary for your power of attorney, and your details, signature, and date on the advance care planning document.
Decide about the house. With no transfer on death deed, choose between a funded trust, a survivorship deed between spouses, or probate.
Store the originals somewhere findable. The $10 will registry and the health care directive registry both help your family find them.
Review after any change. Marriage, divorce, a birth, a death, a move into or out of Idaho, and January 1, 2027 for any guardian nomination.

When To Bring In An Idaho Attorney

Handle a straightforward plan yourself if you like. Bring in a licensed Idaho attorney when you have a blended family, a child with special needs, a business, land in more than one state, an estate near the federal exemption, a mix of separate and community property you cannot sort, or any reason to expect a fight. An attorney is also the right call if a family member is already losing capacity, because a document signed without capacity invites a challenge.

Frequently Asked Questions

What documents does an Idaho estate plan need?

Three for most adults, plus a fourth when your situation calls for it. A will under Idaho Code Title 15, Chapter 2 decides who inherits your probate property, who serves as personal representative, and who you nominate to raise your minor children. A durable power of attorney under Title 15, Chapter 12 covers your money if you cannot act. An advance care planning document under Idaho Code 39-4510 covers your medical care. A revocable living trust under Title 15, Chapter 7 sits on top of those three when you want land or other assets to pass without a probate case.

How many witnesses does an Idaho will need?

Two. Idaho Code 15-2-502 requires a will in writing, signed by you or by someone else in your presence and at your direction, and signed by at least two persons who each witnessed either the signing or your acknowledgment of the signature or of the will. Idaho Code 15-2-505 lets anyone 18 or older who is generally competent to be a witness serve, and a gift to an interested witness stays valid. A handwritten will is also valid under 15-2-503 if the signature and the material provisions are in your handwriting.

Does an Idaho power of attorney have to be notarized?

The statute does not make notarization a condition of validity. Idaho Code 15-12-105 says a power of attorney must be signed by the principal, or by another individual in the principal's conscious presence at the principal's direction, and that the signature is presumed genuine if the principal acknowledges it before a notary public or other officer authorized to take acknowledgments. Banks and title companies lean on that presumption, so sign in front of a notary anyway.

Does Idaho still use a living will?

Not as a separate statutory document. Since 2023, Idaho Code 39-4510 uses one advance care planning document. It must carry your name, date of birth, telephone number, and mailing address, your signature or the signature of your authorized agent, and the date you signed. Naming a health care agent, adding witnesses, and adding a notary are all optional under 39-4510(2).

Is an Idaho trust revocable unless it says otherwise?

Do not count on that default. Idaho has not adopted the Uniform Trust Code, and Title 15, Chapter 7 carries no section that makes a trust revocable by default. Write the power to revoke and amend into the trust itself. Idaho Code 15-6-107 also keeps a revocable trust answerable for your debts and your family's statutory allowances when the probate estate falls short.

Does Idaho have an estate tax or an inheritance tax?

No. The Idaho State Tax Commission states: Idaho has no gift tax or inheritance tax, and its estate tax for deaths expired in 2004. The federal estate tax still exists and reaches only very large estates.

Who makes my medical decisions in Idaho if I sign nothing?

Idaho Code 39-4504 sets the order: a court-appointed guardian, then a health care agent named in an advance care planning document, then your spouse, then an adult child, then a parent, then a person named in a delegation of parental authority, then any relative, then any other competent individual who represents himself or herself as responsible for your care. A surrogate may not act against your advance care planning document or wishes you expressed while you could still decide.

This guide is general information about Idaho estate planning documents, read against the Idaho Code in force on September 24, 2026. Confirm anything that affects your own situation with a licensed Idaho attorney before you sign, because these documents decide who controls your money, your medical care, and your property.

Sources:

Title: Idaho Code 15-2-501, Who may make a will. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH2/SECT15-2-501/
Title: Idaho Code 15-2-502, Execution. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH2/SECT15-2-502/
Title: Idaho Code 15-2-503, Holographic will. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH2/SECT15-2-503/
Title: Idaho Code 15-2-504, Self-proved will. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH2/SECT15-2-504/
Title: Idaho Code 15-2-505, Who may witness. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH2/SECT15-2-505/
Title: Idaho Code 15-2-508, Revocation by divorce, no revocation by other changes of circumstances. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH2/SECT15-2-508/
Title: Idaho Code 15-2-511, Testamentary additions to trusts. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH2/SECT15-2-511/
Title: Idaho Code 15-2-1001, Will registry. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH2/SECT15-2-1001/
Title: Idaho Code 15-2-1105, Execution of electronic will. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH2/SECT15-2-1105/
Title: Idaho Code 15-2-102, Share of the spouse. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH2/SECT15-2-102/
Title: Idaho Code 32-906, Community property, income from separate and community property, conveyance between spouses. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title32/T32CH9/SECT32-906/
Title: Idaho Code 15-12-104, Power of attorney is durable. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH12/SECT15-12-104/
Title: Idaho Code 15-12-105, Execution of power of attorney. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH12/SECT15-12-105/
Title: Idaho Code 15-12-108, Nomination of conservator, relation of agent to court-appointed fiduciary (version in force until January 1, 2027). Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH12/SECT15-12-108/
Title: Idaho Code 15-12-110, Termination of power of attorney or agent's authority. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH12/SECT15-12-110/
Title: Idaho Code 15-12-301, Statutory form power of attorney. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH12/SECT15-12-301/
Title: Idaho Code 39-4504, Persons who may give consent to care for others (version in force until January 1, 2027). Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title39/T39CH45/SECT39-4504/
Title: Idaho Code 39-4510, Advance care planning document. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title39/T39CH45/SECT39-4510/
Title: Idaho Code 39-4512, Execution of advance care planning document. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title39/T39CH45/SECT39-4512/
Title: Idaho Code 39-4515, Health care directive registry. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title39/T39CH45/SECT39-4515/
Title: Idaho Code 15-7-101, Duty to register trusts. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH7/SECT15-7-101/
Title: Idaho Code 15-7-104, Effect of failure to register. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH7/SECT15-7-104/
Title: Idaho Code 15-7-601, Purpose trusts. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH7/SECT15-7-601/
Title: Idaho Code 15-6-107, Liability of nonprobate transferees for creditor claims and statutory allowances. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH6/SECT15-6-107/
Title: Idaho Code 15-6-401, Community property with right of survivorship in real property. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH6/SECT15-6-401/
Title: Idaho Code Title 15, Chapter 6, Nonprobate transfers. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH6/
Title: Idaho Code 15-5-202, Testamentary appointment of guardian of minor (version in force until January 1, 2027). Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH5/SECT15-5-202/
Title: Senate Bill 1240 (2026 Session Law Chapter 79), Uniform Guardianship, Conservatorship, and Other Protective Arrangements Act. Publisher: Idaho State Legislature. Publication Date: Signed March 20, 2026; effective January 1, 2027. URL: https://legislature.idaho.gov/sessioninfo/2026/legislation/S1240/
Title: Idaho Code 15-3-1201, Collection of personal property by affidavit. Publisher: Idaho State Legislature. Publication Date: Not listed. URL: https://legislature.idaho.gov/statutesrules/idstat/Title15/T15CH3/SECT15-3-1201/
Title: Estates and taxes. Publisher: Idaho State Tax Commission. Publication Date: Last modified September 16, 2022. URL: https://tax.idaho.gov/taxes/estates-and-taxes/

It is not legal advice.