Probate Law in Idaho: Estates, Wills, and Intestate Succession

Idaho's probate framework governs the legal transfer of a deceased person's assets to heirs, creditors, and beneficiaries through a court-supervised or summary administrative process. The rules are codified in Title 15 of the Idaho Code, known as the Idaho Uniform Probate Code (IUPC), which Idaho adopted and adapted from the Uniform Probate Code model. This page covers estate administration procedures, will validity requirements, intestate succession rules, and the boundaries between supervised and unsupervised probate pathways under Idaho law. The regulatory landscape intersects with district court jurisdiction, fiduciary obligations, and specific statutory timelines that practitioners and researchers in the Idaho legal system must apply precisely.

Definition and Scope

Probate in Idaho is the judicial and administrative process through which a deceased person's estate — the aggregate of their legal and equitable interests in property — is identified, valued, managed, and distributed. The Idaho Uniform Probate Code (Title 15, Idaho Code) establishes the controlling framework, covering testate succession (death with a valid will), intestate succession (death without a valid will), and the appointment and removal of personal representatives.

The Idaho district courts exercise original jurisdiction over probate matters under Idaho Code § 15-1-302. Each of Idaho's 7 judicial districts has a district court with probate authority. Magistrate judges may hear certain probate proceedings by assignment, consistent with the rules governing Idaho magistrate courts.

Scope limitations: Idaho probate law applies to estates of decedents who were domiciled in Idaho at the time of death, or to real property physically located within Idaho regardless of the decedent's domicile. Property held in joint tenancy with right of survivorship, assets in a valid revocable living trust, life insurance proceeds with a named beneficiary, and payable-on-death (POD) accounts pass outside probate entirely and are not governed by Title 15 proceedings. Federal tax obligations on large estates, including the federal estate tax applicable to gross estates exceeding $13.61 million (as of the 2024 threshold per IRS Publication 559), fall under federal jurisdiction and are not determined by Idaho probate courts. Tribal land held in trust presents distinct jurisdictional considerations addressed under federal Indian law; that area falls outside the scope of this page and is addressed separately under Idaho tribal law and sovereignty.

How It Works

Idaho's probate system operates across two primary procedural tracks and one alternative summary pathway:

1. Informal Probate (Unsupervised)
The personal representative is appointed by a registrar — a judicial officer with limited authority — without a court hearing. This track is available when no will contest is anticipated and the estate does not require court oversight to protect interested parties. The personal representative files an application, is appointed, and administers the estate independently, subject to statutory duties under Idaho Code § 15-3-703. Creditors have 4 months from the date of first published notice — or 60 days from actual mailing to known creditors — to file claims (Idaho Code § 15-3-803).

2. Formal Probate (Supervised)
A district court judge adjudicates disputed matters, including will contests, claims of undue influence, and creditor disputes. Supervised administration may be ordered when the court determines that unsupervised administration is insufficient to protect interested persons. All distributions require court approval under Idaho Code § 15-3-501.

3. Summary Administration
Estates valued at $100,000 or less (excluding liens and encumbrances) may qualify for simplified transfer procedures under Idaho Code § 15-3-1201, allowing an affidavit process rather than full probate. A 30-day waiting period after the decedent's death is mandatory.

Procedural sequence for standard probate:
1. Filing a petition or application in the district court of the decedent's domicile
2. Appointment of personal representative (executor if named in will; administrator if intestate)
3. Publication of notice to creditors in a local newspaper for 3 consecutive weeks
4. Inventory and appraisal of estate assets
5. Payment of valid debts, taxes, and administration expenses
6. Distribution of remaining assets to beneficiaries
7. Filing of a closing statement or petition for discharge

The regulatory context for the Idaho legal system provides additional framework for how Idaho's court procedures interact with statutory mandates at the state level.

Common Scenarios

Testate Estate (Death with a Will)
A valid Idaho will requires the testator to be at least 18 years old, of sound mind, and must be signed by the testator in the presence of 2 competent witnesses who also sign in the testator's presence (Idaho Code § 15-2-502). Holographic wills — handwritten and signed entirely in the testator's own hand — are valid in Idaho without witness signatures (Idaho Code § 15-2-503). Self-proved wills, executed with notarized affidavits, streamline probate by removing the need to locate and examine witnesses.

Intestate Estate (Death Without a Will)
When no valid will exists, Idaho's intestate succession rules under Title 15, Chapter 2 determine distribution. Idaho is a community property state; property acquired during marriage is generally divided equally between surviving spouses and the decedent's estate. The statutory hierarchy for separate property proceeds as follows:

• Surviving spouse and no descendants: entire estate to spouse
• Surviving spouse and descendants of the decedent (who are also descendants of the spouse): entire estate to spouse
• Surviving spouse and descendants not all of whom are descendants of the spouse: one-half to spouse, one-half to descendants by representation
• No surviving spouse: estate passes to descendants, then parents, then siblings, then more remote relatives per Idaho Code § 15-2-103

Contested Wills
Will contests arise on grounds including lack of testamentary capacity, undue influence, fraud, or improper execution. These proceed as formal probate and are litigated in district court. Idaho's 3-year statute of limitations on will contests begins running from the date of informal probate appointment (Idaho Code § 15-3-108), subject to the 3-year outside limit on reopening estates.

Guardianship and Conservatorship Overlap
When a decedent had a court-appointed conservator, the conservatorship estate must be reconciled with probate administration. This intersection is governed separately under Idaho guardianship and conservatorship law, which operates under Title 15, Chapter 5 of the Idaho Code.

Decision Boundaries

Informal vs. Formal Probate
The primary distinction rests on whether interested persons consent and whether disputes exist. Informal probate is faster and lower cost but leaves the personal representative liable for errors without court supervision. Formal probate provides finality through adjudicated orders but requires court appearances and longer timelines.

Probate vs. Non-Probate Transfers
Not all assets require probate. The following pass by operation of law or contract, bypassing the Idaho Uniform Probate Code entirely:

Personal Representative Qualification
Idaho law requires personal representatives to be at least 18 years old and not subject to a conservatorship (Idaho Code § 15-3-203). Nonresident personal representatives are permitted but must appoint the Idaho Secretary of State as an agent for service of process. Institutional fiduciaries — banks and trust companies authorized under Idaho law — may serve as personal representatives for complex estates.

Federal Tax Jurisdiction
Idaho imposes no separate state estate tax. Federal estate tax jurisdiction, filing requirements under IRS Form 706, and the applicable unified credit thresholds are determined entirely by federal law and fall outside Idaho probate court authority. Estates with taxable gross assets require coordination between the personal representative and federal tax counsel independent of Title 15 proceedings.

The Idaho statutes of limitations applicable to cred