8.2 Trusts as IRA Beneficiaries: See-Through, Conduit, Accumulation, and Special-Needs Trusts
Key Takeaways
A see-through trust must be valid under state law, irrevocable at death, and have identifiable beneficiaries.
Treas. Reg. § 1.408-8(b)(4)(ii) says trust documentation need not be provided to an IRA trustee or custodian.
A conduit trust must pass every IRA distribution to the beneficiary, so only that beneficiary's status counts.
An applicable multi-beneficiary trust lets a disabled or chronically ill beneficiary's life expectancy apply.
A surviving spouse cannot treat an inherited IRA as their own when a trust, not the spouse, is the named beneficiary.
Why Name a Trust?
An IRA beneficiary designation passes the money outright. Many owners want something different:
- Minors cannot manage money, and an outright inheritance becomes theirs at the age of majority.
- Spendthrift or vulnerable beneficiaries may waste the money or lose it to creditors.
- Blended families may want a spouse to receive income for life while preserving the remainder for children from a prior marriage.
- Beneficiaries with disabilities may lose Supplemental Security Income or Medicaid if they receive money directly; a supplemental-needs trust can protect eligibility.
The cost of a trust is complexity: the RMD rules look through only some trusts, trust income can be taxed at compressed rates, and the spouse loses the option to treat the IRA as their own.
The See-Through Tests
A trust is a non-individual, so by default it is not a designated beneficiary. Under Treas. Reg. § 1.401(a)(9)-4(f)(2), the trust's beneficiaries are treated as the IRA's beneficiaries if the trust is a see-through trust:
- The trust is valid under state law (or would be except that it has no corpus);
- The trust is irrevocable, or becomes irrevocable at the owner's death;
- The trust's beneficiaries are identifiable from the trust instrument; and
- The documentation requirement is met.
For qualified plans, documentation (a copy of the trust or a certified beneficiary list) is due to the plan administrator by October 31 of the year after death. For IRAs, Treas. Reg. § 1.408-8(b)(4)(ii) states that the documentation need not be provided to the IRA trustee, custodian, or issuer. Banks still usually ask for a trust certification so they know whom they are paying and can build an RMD schedule, but the regulation does not make the October 31 date a see-through test for IRAs.
Conduit Trusts vs. Accumulation Trusts
The final regulations sort see-through trusts into two types (Treas. Reg. § 1.401(a)(9)-4(f)(1)(ii)):
| Feature | Conduit trust | Accumulation trust |
|---|---|---|
| Trust terms | Every IRA distribution received by the trustee must be paid out to (or for) the beneficiary | The trustee may keep IRA distributions in the trust |
| Whose status counts | Generally only the conduit beneficiary | All countable beneficiaries, including remainder beneficiaries who could receive accumulated amounts |
| Example outcome | Conduit for a minor child of the owner: life-expectancy payments until 21, full payout by 31 | Accumulation trust whose remainder goes to adult children: 10-year rule |
| Income tax | Taxed to the beneficiary at individual rates | Amounts kept in the trust are taxed to the trust |
| Protection | Weaker, because distributions reach the beneficiary | Stronger, because the trustee can hold funds back |
If any countable beneficiary of an accumulation trust is a non-individual, such as a charity, the IRA is treated as having no designated beneficiary. The regulations allow some remote contingent beneficiaries to be disregarded, which is why the exact trust wording matters.
Applicable Multi-Beneficiary Trusts (AMBTs)
IRC § 401(a)(9)(H)(iv)–(v) protects trusts for disabled or chronically ill beneficiaries:
- Type I AMBT: the trust is divided immediately at death into separate trusts for each beneficiary, so each separate trust can use its own beneficiary's status.
- Type II AMBT: no individual other than the disabled or chronically ill beneficiary has any right to the IRA during that beneficiary's life. The life-expectancy payout of that beneficiary applies even though the trust may accumulate, which suits supplemental-needs trusts.
SECURE 2.0 § 337 lets a Type II AMBT name a charity as a remainder beneficiary without losing the stretch.
The Spouse and the Trust
When a trust is the beneficiary, the spouse cannot roll over the IRA or elect to treat it as their own, even if the spouse is the trust's only beneficiary (Treas. Reg. § 1.408-8(c)(1)(ii)). An owner who wants to protect children from a prior marriage may accept that cost; an owner whose only goal is to benefit the spouse usually names the spouse directly.
Income Tax on Trust Accumulations
Trusts reach the top 37% federal bracket at a very low level of taxable income: $15,650 for 2025, compared with more than $600,000 for a single individual. IRA distributions that an accumulation trust keeps are taxed to the trust at those compressed rates. Distributions paid out to beneficiaries carry the income to them through distributable net income, where they are taxed at the beneficiaries' rates.
Bank Operations: Administering a Trust Beneficiary
- Title and taxpayer ID. Retitle the inherited IRA to show the decedent and the trust (for example, "Jordan Lee, Deceased, IRA FBO Lee Family Trust dated 3/1/2019, Pat Lee, Trustee"). Report distributions under the trust's EIN with code 4.
- Trustee authority. Obtain a certification of trust or the relevant pages showing the trustee's name and powers.
- Payout schedule. Ask the trustee or the trust's counsel whether the trust is a conduit or accumulation trust and which beneficiary's status applies. The custodian should not draw legal conclusions from the document on its own.
- Separate accounts. If the trust divides into subtrusts at death, the 2024 regulations allow separate-account treatment for those subtrusts in some cases; document the division.
Scenario: A Supplemental-Needs Trust
Marcus died in 2025 at 60, before his RBD. His IRA names the "Marcus Lee Supplemental Needs Trust" for his son Eli, 28, who receives SSI and is disabled within IRC § 72(m)(7). The trust lets the trustee pay for Eli's needs but accumulate the rest, with the remainder to a disability charity after Eli dies. Because no one but Eli may benefit during his life, the trust is a Type II AMBT, and the charity remainder is permitted by SECURE 2.0. Annual distributions can be based on Eli's life expectancy, and the trustee can keep funds in the trust to protect Eli's benefits, accepting trust-level tax on amounts retained.
A trust named as beneficiary of a deceased owner's IRA is valid under state law, became irrevocable at death, and identifies all of its beneficiaries. The trustee never sends trust documents to the bank. How do the 2024 final regulations treat the IRA?
The trust fails the see-through tests because documents did not reach the custodian by October 31 of the year after death.
The trust fails because only a qualified plan, not an IRA, can treat a trust's beneficiaries as designated beneficiaries.
The trust is treated as an estate, so the 5-year rule applies whether the owner died before or after the RBD.
The trust can still be a see-through trust, because documentation need not be provided to an IRA custodian.
An owner's trust requires the trustee to pay every IRA distribution it receives directly to the owner's 12-year-old son, and the owner died in 2025 before his RBD. Which payout applies?
The 5-year rule, because a trust is never treated as a designated beneficiary of an IRA.
Life-expectancy payments based on the son until he turns 21, with full payout by the year he turns 31.
The 10-year rule beginning in 2026, because a trust cannot benefit from minor-child EDB status.
The owner's remaining single life expectancy, reduced by one each year after the year of death.
A widower's IRA names a trust whose only beneficiary during her life is his surviving spouse. After his death, the spouse asks the bank to retitle the IRA in her own name as her own IRA. What is the correct response?
The bank can retitle it, because the spouse is the trust's sole lifetime beneficiary.
The bank can retitle it only after the trustee distributes the trust's other assets.
The spouse cannot treat it as her own, because a trust rather than the spouse is the named beneficiary.
The spouse cannot treat it as her own until she reaches the decedent's required beginning date.
Sections you finish are checked off in the contents.