Trust as IRA Beneficiary: See-Through Rules, 10-Year Rule, and Strategies

Most people leave their IRA to a spouse or children directly. But when someone names a trust as the IRA beneficiary — for control, asset protection, or special-needs planning — the distribution rules change completely. If you've just learned that the IRA doesn't go to you directly but instead goes into a trust, this guide explains what that means for taxes, timing, and your options.

Why People Name Trusts as IRA Beneficiaries

Naming a trust as an IRA beneficiary is less common than naming a person directly, but it's intentional when it happens. The usual reasons:

• Minor children: A parent can't leave an IRA directly to a child under 18. Naming a trust lets the trustee manage distributions responsibly until the child reaches adulthood — though the tax implications are significant (more below).
• Blended families and control: A surviving spouse might get lifetime income from the IRA distributions while ensuring principal ultimately passes to children from a first marriage. A QTIP or conduit trust structure can accomplish this.
• Spendthrift protection: If a beneficiary has creditor problems, addiction issues, or a disability, a trust prevents them from accessing a large lump sum immediately while still providing ongoing distributions.
• Special needs beneficiaries: An inheritance paid directly to someone receiving Medicaid or SSI can disqualify them. A properly structured Special Needs Trust (SNT, also called a supplemental needs trust) receives the IRA distributions and uses them for supplemental expenses without displacing government benefits.
• Estate tax planning: Prior to the current $15M per-person estate tax exemption, credit shelter trusts were commonly funded with IRA assets. Many older trust documents still contain this structure.

The 4 See-Through Trust Requirements

The IRS allows a trust to be treated as if its individual beneficiaries were the IRA beneficiaries — but only if the trust meets four specific requirements. When these requirements are met, the trust is called a "see-through trust" or "look-through trust." Under Treas. Reg. §1.401(a)(9)-4:¹

1. Valid trust under state law. The trust must be a valid legal trust under the laws of the state where it was created (or will be valid upon the IRA owner's death).
2. Irrevocable at death. The trust must be irrevocable, or by its terms become irrevocable upon the IRA owner's death. A revocable living trust that automatically becomes irrevocable at death satisfies this requirement.
3. Identifiable beneficiaries. The beneficiaries of the trust — specifically those who are beneficiaries with respect to the trust's interest in the IRA — must be identifiable from the trust document. Beneficiaries don't need to be named individuals; they can be described by class (e.g., "my living descendants per stirpes") as long as the oldest beneficiary can be identified.
4. Documentation provided to the IRA custodian by October 31. By October 31 of the year following the year of the IRA owner's death, the trustee must provide the IRA custodian with either (a) a copy of the trust document or (b) a list of all beneficiaries of the trust, with certification that the list is complete and accurate. This deadline is hard — missing it means the trust fails the see-through test, with serious consequences (see below).

All four requirements must be met simultaneously. A trust that passes three of four is still a failed see-through trust for IRA purposes.

Conduit Trust vs. Accumulation Trust

Not all see-through trusts work the same way. The most important distinction is between conduit trusts and accumulation trusts:

Conduit Trust

A conduit trust requires the trustee to pass through all IRA distributions immediately to the individual trust beneficiaries — the trust can't accumulate the money. It acts as a channel: IRA distribution → trust → beneficiary. Because nothing stays in the trust, the individual beneficiary's characteristics determine the distribution rules: their EDB status (if any), their age, their life expectancy.

Example: A conduit trust names three adult children (ages 55, 52, and 48) as equal beneficiaries. Each child is a non-EDB. The 10-year rule applies, and distributions must be fully distributed to the children within 10 years. The trust itself doesn't accumulate — when the IRA makes a distribution, the trust immediately distributes it to the three children, each of whom reports 1/3 as ordinary income.

Tax advantage of conduit trust: Because distributions flow immediately to individual beneficiaries, they're taxed at the beneficiary's personal income tax rate — not the compressed trust bracket. For most beneficiaries, this is far more favorable.

Accumulation Trust

An accumulation trust permits the trustee to retain IRA distributions inside the trust rather than distributing them immediately. This gives the trustee discretion over when to distribute to individual beneficiaries — useful for spendthrift protection or managing a beneficiary's tax situation.

The tradeoff: because assets can accumulate in the trust, the IRS treats the trust entity as the beneficiary for RMD purposes. The trust must identify the "oldest applicable beneficiary" whose life expectancy governs — but under the SECURE Act, for most non-EDB situations, the 10-year rule controls regardless of age. Any potential beneficiary of the trust (including remainder beneficiaries like a charity) is counted when assessing EDB eligibility.

Critical trap: If any potential trust beneficiary is a non-EDB (which is almost always true when the trust has multiple individual beneficiaries or a charity as remainderman), the accumulation trust gets the 10-year rule. Distributions that accumulate inside the trust face the compressed trust income tax brackets — 37% on income over $16,000 — rather than individual rates.²

The 10-Year Rule for Trust Beneficiaries

Under the SECURE Act (IRC §401(a)(9)(H)), effective for deaths on or after January 1, 2020, most non-spouse IRA beneficiaries must fully distribute the inherited IRA within 10 years of the account owner's death. For trusts named as IRA beneficiary, the rule works as follows:³

• Conduit trust with non-EDB individual beneficiaries: 10-year rule applies. All IRA assets must be distributed out of the IRA (and through the trust to the beneficiaries) by December 31 of the 10th year following the owner's death.
• Conduit trust with EDB individual beneficiary: EDB rules apply as if the beneficiary held the account directly. The most common EDB is the surviving spouse — who gets spousal rollover rights if a conduit trust is designed correctly. Minor children of the account owner also qualify as EDBs (see below).
• Accumulation trust: Unless the trust's underlying beneficiaries are all EDBs (rare), the 10-year rule applies. The accumulation trust gets no benefit from individual EDB status because it permits retention rather than pass-through.

The 10-year clock starts January 1 of the year after the IRA owner's death. The final distribution must be made by December 31 of year 10. Within that window, distributions can be timed however the trust document and strategy dictate — there's no fixed annual minimum amount (with one important exception covered next).

Annual RMDs: When They Apply Inside the 10-Year Window

IRS final regulations published in 2024 (T.D. 10001) resolved a long-standing question about whether the 10-year rule also requires annual minimum distributions during years 1–9.⁴

The answer depends on whether the IRA owner died after their Required Beginning Date (RBD):

• IRA owner died BEFORE their RBD: No annual distributions required during years 1–9. The trust (or conduit beneficiaries) can take nothing for 9 years and distribute the entire account in year 10. (Though this may not be tax-optimal.)
• IRA owner died ON OR AFTER their RBD: Annual minimum distributions ARE required during years 1–9, in addition to full account depletion by year 10. The annual amount is calculated using the IRS Single Life Table and the applicable beneficiary's age (for conduit trusts) or the oldest trust beneficiary's age (for accumulation trusts).

RBD ages under SECURE 2.0 (§107):

• Born 1951–1959: RBD is April 1 following the year they turn 73
• Born 1960 or later: RBD is April 1 following the year they turn 75

For trust beneficiaries of accumulation trusts, this means the trustee must calculate and take minimum annual distributions from the IRA during years 1–9 — even though those amounts may then sit in the trust and face compressed bracket taxation. Missing annual RMDs triggers a 25% excise tax under IRC §4974 (reduced to 10% if corrected within the 2-year correction window).

What Happens When the See-Through Test Fails

If the trust doesn't meet all four see-through requirements — or if the trustee misses the October 31 documentation deadline — the trust is treated as a non-designated beneficiary. The IRA has no "human" beneficiary for RMD purposes. The consequences are severe:

• IRA owner died BEFORE their RBD: The 5-year rule applies. The entire IRA must be distributed by December 31 of the fifth year following the owner's death. No 10-year window — just 5 years, and the entire amount is ordinary income.
• IRA owner died AFTER their RBD: Distributions must be made over the IRA owner's remaining single life expectancy as of the year of death (the "ghost life expectancy"). This may be more or less favorable than the 10-year rule depending on the owner's age, but it cannot be stretched across generations and isn't flexible.

The 5-year rule outcome is typically the worst case — concentrating a large IRA into 5 years of income can push the trust's taxable income into the 37% bracket in every year. This is why the October 31 documentation deadline is critical and non-negotiable.

The Tax Math: Why Accumulation Trusts Can Be Brutal

Federal income tax rates for trusts and estates are the most compressed in the tax code. For 2026 (Rev. Proc. 2025-32):²

Additionally, the 3.8% Net Investment Income Tax (NIIT) applies to trust NII above the highest bracket threshold — effectively $16,000 for 2026 — creating a combined marginal rate of 40.8% on investment income above that amount.

An individual beneficiary doesn't hit 37% until income exceeds $640,600 (single) or $768,700 (married filing jointly) in 2026. A trust hits 37% at $16,000 of income.

Example — why conduit beats accumulation for most situations:

• An inherited IRA worth $600,000 must be distributed within 10 years.
• Assume equal $60,000 annual distributions.
• Conduit trust, beneficiary in 22% bracket: $60,000 × 22% = $13,200 tax per year. 10-year total: ~$132,000 in tax.
• Accumulation trust, retaining all distributions: By year 2 the trust has ~$120,000 in income; virtually all subsequent distributions hit the 37% bracket. 10-year total: potentially $200,000+ in tax on the same distributions — plus the trust may owe NIIT on growth.

This math is why a well-designed conduit trust — where distributions pass immediately to individual beneficiaries — is almost always more tax-efficient for non-EDB adult beneficiaries than an accumulation trust.

EDB Trusts: Surviving Spouse and Minor Children

Surviving Spouse as Trust Beneficiary

A surviving spouse who receives IRA distributions directly — not through a trust — can roll the IRA into their own IRA and avoid the 10-year rule entirely. This is the most powerful IRA benefit available to any beneficiary.

When a trust is in the way, the spousal rollover right is lost by default — unless the trust is specifically designed as a conduit trust that qualifies as an "eligible designated beneficiary" trust for spouses. The IRS allows a surviving spouse to treat the IRA as their own if the trust meets specific requirements under Treas. Reg. §1.401(a)(9)-4(f): the spouse must be the sole beneficiary of the trust and must have the right to withdraw the entire account balance at any time.

If those conditions aren't met, the spouse is stuck with the 10-year rule through the trust — far less favorable than a direct rollover. Many surviving spouses are surprised to discover the trust that was supposed to benefit them actually costs them years of tax-deferred growth. An inheritance specialist can sometimes find remediation options (see below).

Minor Children of the Account Owner as Trust Beneficiaries

Minor children of the IRA owner (not grandchildren — this specific EDB category applies only to the owner's own minor children) are Eligible Designated Beneficiaries until they reach the IRS "age of majority" of 21.³ During the minority period, they receive life-expectancy distributions. When the child turns 21, the 10-year clock starts — the IRA must be fully distributed by age 31.

When a trust is named for a minor child (rather than the child directly), a conduit trust that immediately passes distributions to the child can preserve EDB treatment. An accumulation trust that retains distributions cannot — the EDB exception applies to the child as an individual, not to the trust entity. If distributions accumulate in the trust, all income is taxed at compressed trust rates. Given that minor children often have little other income, the tradeoff between EDB pass-through vs. accumulation protection requires careful analysis.

Remediation Options: What Beneficiaries Can Do

If you've inherited an IRA that names a trust, and you've determined the structure isn't optimal, there are sometimes corrective options — but most require fast action:

Disclaimer by the trust

If the trust holds a qualified disclaimer power, the trustee may be able to disclaim the trust's interest in the IRA within 9 months of the IRA owner's death (IRC §2518). If the trust disclaims, the IRA passes to the contingent beneficiary — which might be an individual who can then receive it directly. This is fact-specific and requires trust counsel immediately.

Trust modification

Some states allow trust modification with beneficiary consent or court approval. Converting an accumulation trust to a conduit trust (or adding mandatory distribution language) may be possible before the first annual distribution is required. This requires a trust attorney with experience in retirement accounts specifically — not all trust attorneys understand the IRA overlay.

Trustee-to-trustee transfer

The trust's interest in the IRA can be transferred from one IRA custodian to another via a trustee-to-trustee transfer — retitling the account at a more accommodating custodian without triggering a taxable distribution. This doesn't change the distribution rules but can improve investment options and reporting.

The 60-day trap: don't accept a check

If the IRA custodian sends a distribution check made payable to the trust, that's a taxable distribution — the 60-day rollover rule does NOT apply to non-spouse beneficiaries (IRC §408(d)(3)(C)). The money cannot be put back. Instruct the trustee to request only trustee-to-trustee transfers or direct reregistrations, never check distributions that the trust receives.

Action Steps and the October 31 Deadline

If an IRA has been left to a trust, the trustee's immediate priority list:

1. Locate the IRA custodian and file a death claim. Provide the death certificate and trust documentation. Do not accept any disbursement check — insist on retitling the account as an inherited IRA in the trust's name.
2. Read the trust document. Identify whether it's a conduit or accumulation trust. Look for mandatory distribution language.
3. Engage a tax attorney or CPA who specializes in inherited IRAs by month 3. Trust-as-IRA-beneficiary is one of the most fact-specific and time-sensitive areas in inheritance planning. The remediation options close sequentially — the disclaimer window closes at 9 months.
4. Meet the October 31 documentation deadline. By October 31 of the year following death, the trustee must provide the IRA custodian with a copy of the trust or a certified beneficiary list. Calendar this now — missing this deadline converts a favorable see-through trust to a non-designated beneficiary with potentially catastrophic consequences.
5. Establish the RMD calculation for year 1. If the owner died after their RBD, the first annual RMD from the IRA is due by December 31 of the year following death. (Exception: if the owner died in the first year and had not yet taken their own RMD for that year, the trust/beneficiary must take it by December 31 of the year of death.)
6. Model the 10-year distribution strategy. For non-EDB conduit trusts, simulate the tax cost of different distribution timelines to the beneficiaries — bracket management across 10 years can save tens of thousands of dollars.

Sources

1. Treas. Reg. §1.401(a)(9)-4 — Designated beneficiary: see-through trust requirements (valid trust, irrevocable at death, identifiable beneficiaries, October 31 documentation deadline).
2. IRS Rev. Proc. 2025-32 — 2026 trust and estate income tax brackets: 10% ≤$3,300 | 24% $3,300–$11,700 | 35% $11,700–$16,000 | 37% >$16,000; NIIT threshold for trusts $16,000.
3. IRS — Required Minimum Distributions for IRA Beneficiaries: 10-year rule, EDB categories including minor children of account owner (IRC §401(a)(9)(E)(ii)).
4. T.D. 10001 (Federal Register, July 2024) — IRS final regulations on required minimum distributions: annual RMD requirement during 10-year window when account owner died after Required Beginning Date.
5. IRC §408(d)(3)(C) — 60-day rollover rule does not apply to inherited IRAs for non-spouse beneficiaries; once distributed, cannot be returned.
6. IRC §2518 — Qualified disclaimer: 9-month deadline, written disclaimer, no acceptance of interest or direction of assets.

Trust-as-IRA-beneficiary rules are among the most technically complex in inheritance planning. This guide reflects 2026 IRS regulations and SECURE Act rules. Tax brackets verified against IRS Rev. Proc. 2025-32. Your specific trust document, state law, and family situation control the outcome — consult a tax attorney or CPA specializing in inherited IRAs before taking action.