Idaho Custodial Trusts

Part of my Idaho Trusts Overview.

By Ronald W. Brilliant, Attorney at Law · Licensed in Idaho, Nevada & California · Last reviewed: September 2026 against the Idaho Code (Titles 15 and 68) as posted by the Idaho Legislature (July 1, 2026)

In This TopicIdaho TrustsTopic 9 of 14: Custodial Trusts

A custodial trust is a simple, ready-made trust created under a statute rather than a long trust document. Idaho’s version is the Idaho Uniform Custodial Trust Act (Idaho Code § 68-1321). A person can set one up for themselves or for another individual, and the act supplies the rules for how the custodial trustee manages, spends, reports on, and hands over the property.

Custodial trusts matter most to people planning for their own possible incapacity, and to families who want someone to manage property for an adult who cannot manage it. The act does not replace other kinds of trusts. A trust that does not fit the act may still be enforceable under other law (Idaho Code § 68-1302(8)).

Key Terms

• Transferor: the person who creates the custodial trust by transfer or declaration (Idaho Code § 68-1301(14)).
• Custodial trustee: the person named as trustee, or a substitute or successor (§ 68-1301(6)).
• Beneficiary: the individual for whose use and benefit the property is held (§ 68-1301(2)).
• Adult: an individual who is at least eighteen (18) years old (§ 68-1301(1)).
• Incapacitated: lacking the ability to manage property and business affairs effectively because of mental illness, mental disability, physical illness or disability, chronic use of drugs, chronic intoxication, confinement, detention by a foreign power, disappearance, minority, or other disabling cause (§ 68-1301(8)).
• Member of the beneficiary’s family: the beneficiary’s spouse, descendant, stepchild, parent, stepparent, grandparent, brother, sister, uncle, or aunt, whether of the whole or half blood or by adoption (§ 68-1301(10)).

How a Custodial Trust Is Created

There are two basic ways. A person may make a written transfer of property to another person, naming a beneficiary (who may be the transferor), with the transferee designated in substance as custodial trustee under the Idaho uniform custodial trust act (Idaho Code § 68-1302(1)).

Or an owner may sign a written declaration that they hold property as custodial trustee for a beneficiary other than themselves (§ 68-1302(2)). A declaration for the sole benefit of the declarant is not a custodial trust under the act (§ 68-1302(2)).

The statute includes sample forms for a transfer and for a declaration of trust (Idaho Code § 68-1318(1)). Customary ways of transferring or showing ownership may also be used, including (§ 68-1318(2)):

• Registering a security, or crediting money or securities to a broker or financial institution account, in the custodial trustee’s name “as custodial trustee for (name of beneficiary)” under the act (§ 68-1318(2)(a), (c)).
• Registering ownership of a life or endowment insurance policy or annuity contract with the issuer in the custodial trustee’s name (§ 68-1318(2)(d)).
• Recording a conveyance of an interest in real property to the custodial trustee (§ 68-1318(2)(h)).
• Having a certificate of title for tangible personal property issued in or endorsed to the custodial trustee’s name (§ 68-1318(2)(i)).
• Delivering a written assignment or an instrument of gift to the custodial trustee (§ 68-1318(2)(e), (j)).

Title to the property is in the custodial trustee, and the beneficial interest is in the beneficiary (Idaho Code § 68-1302(3)). Anyone may add property to an existing custodial trust (§ 68-1302(6)). The transferor may name, or authorize naming, a successor custodial trustee in the trust instrument (§ 68-1302(7)).

Naming a Custodial Trustee for a Future Payment

A person who has the right to name who receives property on a future event can name a recipient “as custodial trustee for (name of beneficiary)” under the act, and the custodial trust is created when the event happens (Idaho Code § 68-1303(1)). Substitute or successor custodial trustees may be named in order (§ 68-1303(2)).

This designation may be made in a will, a trust, a deed, a multiple-party account, an insurance policy, an instrument exercising a power of appointment, or a writing naming a beneficiary of contract rights (§ 68-1303(3)). Otherwise, to be effective, it must be registered with or delivered to the fiduciary, payor, issuer, or obligor of the future right (§ 68-1303(3)).

Transfers for an Incapacitated Person Without a Conservator

A person who holds property of, or owes a debt to, an incapacitated individual who has no conservator (a court-appointed manager of property) may transfer it to an adult member of the beneficiary’s family or to a trust company as custodial trustee (Idaho Code § 68-1305(1)). This applies unless an instrument naming a custodial trustee directs otherwise (§ 68-1305(1)).

If the property or debt is worth more than $20,000, the transfer is not effective unless the court authorizes it (§ 68-1305(1)). A signed written acknowledgment of delivery from the custodial trustee is a sufficient receipt and discharge (§ 68-1305(2)). For court-supervised management, see Idaho conservatorship.

Multiple Beneficiaries

A custodial trust for several beneficiaries is treated as separate custodial trusts of equal undivided interests (Idaho Code § 68-1306(1)). There is no right of survivorship unless the instrument specifically provides for it, survivorship is required as to community or marital property, or the trust is for a husband and wife, for whom survivorship is presumed (§ 68-1306(1)). The custodial trustee must account separately to each beneficiary (§ 68-1306(3)).

Accepting the Role

A custodial trustee’s obligations begin when the trustee accepts the property, expressly or by implication (Idaho Code § 68-1304(1)). The statute provides a sample “Custodial Trustee’s Receipt and Acceptance” (§ 68-1304(2)). Once the trustee accepts, the trustee is subject to the personal jurisdiction of the court for any matter relating to the custodial trust (§ 68-1304(3)).

Who Is in Charge: Beneficiary Directions and Incapacity

The key feature of a custodial trust is that the beneficiary stays in control while able. If the beneficiary is not incapacitated, the custodial trustee must follow the beneficiary’s directions about managing, controlling, investing, or keeping the property (Idaho Code § 68-1307(2)). The trustee must also pay or spend as much of the property as the beneficiary directs from time to time (§ 68-1309(1)).

If the beneficiary is incapacitated, the custodial trustee spends as much as the trustee considers advisable for the beneficiary and for people the beneficiary was supporting when the incapacity began, or who are legally entitled to the beneficiary’s support (Idaho Code § 68-1309(2)). These payments can be made without a court order and without regard to the beneficiary’s other support, income, or property (§ 68-1309(2)).

The custodial trustee must administer the trust as for an incapacitated beneficiary if (Idaho Code § 68-1310(1)):

• The custodial trust was created under § 68-1305 (a transfer for an incapacitated person without a conservator);
• The transferor directed it in the instrument creating the trust; or
• The custodial trustee has determined that the beneficiary is incapacitated.

The trustee may decide the beneficiary is incapacitated based on earlier direction from the beneficiary (including under a durable power of attorney), a physician’s certificate, or other persuasive evidence (§ 68-1310(2)). On petition of the beneficiary, the custodial trustee, or another interested person, the court shall decide whether the beneficiary is incapacitated (§ 68-1310(4)). A trustee who has reason to believe the beneficiary is incapacitated must administer the trust under the rules for an incapacitated beneficiary (§ 68-1310(5)).

If the trustee reasonably concludes that the incapacity has ended, or that the beneficiary’s ability to manage property and business affairs has changed since the creation of a custodial trust directing administration as for an incapacitated beneficiary, the trustee may go back to administering the trust as for a beneficiary who is not incapacitated (§ 68-1310(3)). Incapacity does not end the custodial trust, a successor designation, the trustee’s powers, or protections for third persons acting on the trustee’s instructions (§ 68-1310(6)).

An agent acting under a durable power of attorney for an incapacitated beneficiary cannot use that power to end or direct the custodial trust (Idaho Code § 68-1307(6)). See Idaho powers of attorney for how those documents work.

The Custodial Trustee’s Duties and Powers

• Take control: subject to the beneficiary’s directions, take control of and collect, hold, manage, invest, and reinvest the property (Idaho Code § 68-1307(3)); register or record the title instrument if appropriate (§ 68-1307(1)).
• Standard of care: absent contrary direction from a beneficiary who is not incapacitated, act as a prudent person dealing with property of another, without being limited by other laws restricting fiduciary investments (§ 68-1307(2)). The trustee may, in its discretion, keep property received from the transferor (§ 68-1307(2)).
• Special skills: a trustee with special skill or expertise, or named because of one, must use it (§ 68-1307(2)).
• Keep property separate: keep custodial trust property separate from all other property and clearly identified as the beneficiary’s (§ 68-1307(4)).
• Keep records: keep records of all transactions, including tax information, available at reasonable times to the beneficiary or the beneficiary’s legal representative (§ 68-1307(5)).
• Powers: the trustee has all the rights and powers over the property that an unmarried adult owner has over their own property, but may use them only in a fiduciary capacity (§ 68-1308(1)). Those powers do not excuse a breach of the duties above (§ 68-1308(2)).

The trustee may open checking, savings, or similar accounts of reasonable amounts that either the trustee or the beneficiary can draw on (Idaho Code § 68-1309(3)). Money the beneficiary takes from such an account counts as a distribution to the beneficiary (§ 68-1309(3)). For the broader duties of ordinary trustees, see trustee duties and liabilities.

Expenses, Compensation, and Bond

Unless the trust instrument, an agreement with the beneficiary, or a court order says otherwise, a custodial trustee (Idaho Code § 68-1314):

• Is entitled to reimbursement from the property for reasonable expenses (§ 68-1314(1)).
• May choose to charge reasonable compensation for each calendar year’s services. This election is noncumulative and must be made no later than six (6) months after the end of that calendar year (§ 68-1314(2)).
• Need not furnish a bond (§ 68-1314(3)).

Reports and Accountings

When the custodial trustee accepts the property, the trustee must give a written statement describing it (Idaho Code § 68-1315(1)). After that, the trustee must give a written statement of the administration (§ 68-1315(1)):

• Once each year;
• On request at reasonable times by the beneficiary or the beneficiary’s legal representative;
• On the trustee’s resignation or removal; and
• When the custodial trust ends.

Statements go to the beneficiary or the beneficiary’s legal representative, if any (§ 68-1315(1)). The beneficiary, the beneficiary’s legal representative, an adult family member, or another interested person may petition the court for an accounting (§ 68-1315(2)). On petition, and after notice to interested persons, the court may give the trustee instructions or review the trustee’s acts or the reasonableness of compensation (§ 68-1315(6)).

Changing Custodial Trustees

Before accepting the property, a named custodial trustee may decline by notifying the person who made the designation, the transferor, or the transferor’s legal representative (Idaho Code § 68-1313(1)). After accepting, a trustee may resign by giving written notice to any successor, the beneficiary, and the conservator of an incapacitated beneficiary, and by transferring the property and records to the successor (§ 68-1313(2)).

If a custodial trustee is ineligible, resigns, dies, or becomes incapacitated, the successor is chosen in this order (Idaho Code § 68-1313(3)-(4)):

1. The successor named under § 68-1302 or § 68-1303.
2. If none, a successor named by the beneficiary, if not incapacitated.
3. If the beneficiary is incapacitated or does not act within ninety (90) days, the beneficiary’s conservator.
4. If there is no conservator or the conservator fails to act, a successor named by the resigning custodial trustee.
5. If still none, the court, on petition of the transferor, a legal representative, an adult family member, the beneficiary’s guardian, or another interested person.

The beneficiary, the beneficiary’s conservator, an adult family member, a guardian of the person, or another interested person may petition the court to remove the custodial trustee for cause, to require a bond, or for other appropriate relief (Idaho Code § 68-1313(6)). If a trustee is removed, the court shall require an accounting and order the property and records delivered to the successor (§ 68-1315(5)).

Ending a Custodial Trust

The transferor generally cannot end a custodial trust (Idaho Code § 68-1302(4)). The beneficiary, if not incapacitated, or the conservator of an incapacitated beneficiary, may end it by delivering a signed writing to the custodial trustee (§ 68-1302(5)). If not ended earlier, it ends when the beneficiary dies (§ 68-1302(5)).

When the trust ends, the trustee transfers the remaining property (Idaho Code § 68-1317(1)):

Situation	Who receives the property
Beneficiary living and not incapacitated	The beneficiary (§ 68-1317(1)(a))
Beneficiary incapacitated	The conservator or other recipient designated by the court (§ 68-1317(1)(b))
Beneficiary has died	In order: (1) as last directed in a writing the beneficiary signed while not incapacitated and the trustee received during the beneficiary’s life; (2) the survivor of multiple beneficiaries, if survivorship applies; (3) as designated in the instrument creating the trust; (4) the beneficiary’s estate (§ 68-1317(1)(c))

If the person who would receive the property is incapacitated when the trust would otherwise end, the trust continues for that person until the incapacity is removed or the trust otherwise ends (Idaho Code § 68-1317(2)). The trustee keeps the power to pay obligations incurred before the trust ended, even after the beneficiary dies (§ 68-1317(3)).

Deadlines for Claims Against a Custodial Trustee

Claim	Deadline to start an action
Accounting or breach of duty, after receiving a final account or statement fully disclosing the matter	Two (2) years after receiving it (Idaho Code § 68-1316(1)(a))
Accounting or breach of duty, with no such final account or statement	Three (3) years after the custodial trust ends (§ 68-1316(1)(b))
Fraud, misrepresentation, or concealment related to final settlement, or concealing the trust’s existence	Five (5) years after the custodial trust ends (§ 68-1316(2))

These deadlines are extended for some claimants (Idaho Code § 68-1316(3)). A minor’s claim is not barred until the earlier of two (2) years after becoming an adult or death. An incapacitated adult’s claim is not barred until the earliest of two (2) years after a conservator is appointed, the incapacity is removed, or death. For an adult who was not incapacitated and has died, the claim is not barred until two (2) years after death.

Protection and Liability of Third Persons

A third person acting in good faith may deal with someone who claims to be a custodial trustee without a court order (Idaho Code § 68-1311). Without knowledge to the contrary, the third person does not have to check the trustee’s designation, authority, instruments, or how the property is used (§ 68-1311(1)-(4)).

Claims on contracts, ownership, or torts during administration may be asserted against the custodial trust property by suing the custodial trustee in a fiduciary capacity (Idaho Code § 68-1312(1)). The trustee is not personally liable on a contract properly made in a fiduciary capacity unless the trustee fails to reveal that capacity or identify the trust, and not for ownership obligations or torts unless personally at fault (§ 68-1312(2)). The beneficiary is not personally liable unless personally in possession of the property causing the liability or personally at fault (§ 68-1312(3)).

When Idaho’s Act Applies

The act applies to a transfer or declaration that refers to it if, at that time, the transferor, beneficiary, or custodial trustee is an Idaho resident or has its principal place of business in Idaho, or the property is located in Idaho (Idaho Code § 68-1319(1)). The trust stays subject to Idaho’s act even if someone later moves or the property is removed (§ 68-1319(1)). A transfer under a substantially similar act of another state is governed by that state’s law and may be enforced in Idaho (§ 68-1319(2)).

For custodianships for minors, which follow a different act, see Idaho transfers to minors.

How I Can Help

I help clients decide whether a custodial trust fits their planning, prepare the transfer or declaration and acceptance documents, and advise custodial trustees and families on duties, reports, successor trustees, and court petitions under the Idaho Uniform Custodial Trust Act. Request a consultation to discuss your situation.

This page provides general information about Idaho trust law, based on the Idaho Code, and is not legal advice. Court rules and case law also affect these matters. Every situation is different; consult an attorney about yours. Reading this page does not create an attorney-client relationship.