How to Write a Will in Idaho (2026 Guide)

This is general legal information for Idaho, not legal advice. Will laws change, and specific situations can have exceptions. For any complex case, consult a licensed attorney in Idaho.

Why Having a Will Matters

A will is the simplest, clearest way to say what happens to your property, your minor children, and your affairs after you die. Without one, you die "intestate" and Idaho’s default inheritance rules (called intestate succession) take over. Those rules are rigid and generic — they do not know your relationships, your intentions, or the people you care about most. They follow a fixed formula.

The cost of skipping a will is not hypothetical. It plays out the same way in Idaho as everywhere else: unmarried partners locked out, stepchildren with nothing, pets in shelters, court-appointed administrators, family disputes over items and money, and a probate process that is slower, messier, and more expensive than it needed to be. Whatever you own — even if you think it’s "not much" — someone will have to deal with it after you’re gone. A will decides whether that someone is you or a judge.

A simple Idaho will takes about ten minutes to draft using a free tool and costs nothing. You can start drafting yours now. The rest of this guide walks you through what makes a will legally valid in Idaho and how to avoid the technical mistakes that most commonly cause wills to be thrown out.

Idaho Will Requirements at a Glance

• Minimum age: 18 years old (Emancipated minors may make a will. Idaho follows the UPC)
• Written form: Must be in writing. Can be typed, printed, or handwritten. Electronic wills are also recognized under Idaho Code 15-2-1101 et seq.
• Witnesses required: 2
• Notarization: Not required for a standard signed will
• Self-proving affidavit: Yes — recommended, it speeds up probate later
• Holographic (handwritten) wills: Yes
• Electronic wills: Yes

Testamentary Capacity

The testator must be of sound mind and memory, meaning they understand the nature of their property, their relationship to family members, and the effect of the testamentary act

Signature Requirements in Idaho

You must personally sign the will. Idaho does allow proxy signing in specific cases: Some other person may sign in the testator's presence and by the testator's direction

Witness Requirements in Idaho

Idaho requires 2 witnesses. Generally competent persons. Interested witnesses do not invalidate the will

Presence rules: Each witness must witness either the signing or the testator's acknowledgment of the signature or the will

Interested witnesses: The will is not invalidated by the signature of an interested witness under Idaho's UPC framework

The safest approach in every state, including Idaho, is to use witnesses who are adults, not beneficiaries under the will, and not the person you’ve named as executor. This avoids any question about whether a witness’s inheritance could be "purged" for being an interested party.

Notarization and Self-Proving Affidavits

Idaho does not require a will to be notarized to be valid. A signed and witnessed will is enough. Not required for validity. Required for a self-proving affidavit

Idaho does allow a self-proving affidavit, which is a short notarized document attached to the will where you and your witnesses swear under oath that everything was signed properly. It is optional, but it is strongly recommended — a self-proving affidavit means the probate court can admit the will without having to contact your witnesses later. The testator and witnesses must sign an affidavit before an officer authorized to administer oaths (Idaho Code 15-2-504). For electronic wills, see Idaho Code 15-2-1108

Holographic, Electronic, and Oral Wills in Idaho

Holographic (handwritten) wills: Recognized in Idaho. Valid whether or not witnessed if the signature and material provisions are in the testator's handwriting (Idaho Code 15-2-503)

Electronic wills: Recognized in Idaho under specific conditions. Idaho adopted the Uniform Electronic Wills Act (Idaho Code 15-2-1101 through 15-2-1112). Electronic wills must be readable as text, electronically signed by the testator, and witnessed by at least two persons

Nuncupative (oral) wills: Not recognized in Idaho.

How to Revoke or Update a Idaho Will

If you already have a will and want to change it, Idaho recognizes these revocation methods: Executing a subsequent will that revokes the previous will expressly or by inconsistency, Burning, tearing, canceling, obliterating, or destroying the will with intent to revoke, Another person may perform the revocatory act in the testator's presence and by the testator's direction, Revocation of a duplicate original revokes all duplicates. Idaho Code 15-2-507

The cleanest approach is to draft a new will that starts with the sentence "I revoke all previous wills and codicils," then sign it with the proper witnesses. Destroy old copies when you do. Small updates can technically be done by codicil (a formal amendment), but a fresh will is usually easier to read and harder to contest.

Special Provisions in Idaho

Idaho is a community property state. Each spouse owns an undivided one-half interest in community property. A testator may dispose of their half of community property and all separate property. No elective share statute because community property law protects the surviving spouse. Idaho has homestead allowance and exempt property provisions under the UPC

Step-by-Step: Writing a Valid Idaho Will

1. Take inventory. Bank accounts, vehicles, property, valuables, digital assets, pets.
2. Decide who gets what. Be specific for items that matter (names, addresses, account identifiers). Use a residuary clause ("everything else goes to...") to catch anything you forget.
3. Name an executor. The person who handles your estate. Pick someone trustworthy, organized, and likely to outlive you. Name a backup too.
4. Name a guardian for minor children if you have kids under 18. This is the single most important reason for a will if you’re a parent.
5. Draft the document. Our free drafting tool generates a Idaho-specific will in about 10 minutes, with all the correct clauses in the correct order.
6. Print the will. Don’t rely on a digital copy for signing.
7. Sign in front of 2 adult witnesses who are not named as beneficiaries. You all need to be in the same room at the same time. You sign first, they sign while watching.
8. Sign the self-proving affidavit in front of a notary. This is optional but speeds up probate later.
9. Store it somewhere findable. A fireproof home safe is the standard choice. Tell your executor where it is.
10. Review every few years and after major life events (marriage, divorce, new child, moving out of Idaho, major asset changes).

Common Idaho Will Mistakes to Avoid

• Wrong number of witnesses. Idaho requires 2. More is fine; fewer invalidates the will.
• Using a beneficiary as a witness. Can cause the beneficiary’s share to be "purged" (forfeited).
• Not signing in the witnesses’ presence. The signing has to happen as a ceremony, with everyone in the same room.
• Forgetting a residuary clause. Without it, anything you didn’t specifically mention falls into intestate succession.
• Storing the will where nobody can find it. An unfindable will is the same as no will.
• Not updating after major life events. An ex-spouse named in an old will can still inherit in some situations.

Need to Check Details?

You can also read the full Idaho will requirements and the Idaho estate planning guide for background on intestate succession, probate, and related topics.

Start Your Idaho Will Now

The easiest way to get a valid Idaho will done today is our free drafting tool. It walks you through the questions, generates a Idaho-specific document with the correct clauses, and gives you signing instructions tailored to Idaho’s requirements. No account, no cost, nothing stored on our servers. You’ll have a draft ready in about ten minutes.

Whatever you decide, decide. A simple will is one of the most meaningful things you can leave the people you love — and it’s one of the easiest things to put off until it’s too late.