Naming a Trust as Your IRA Beneficiary: The See-Through Rules
Your will says everything pours into the family trust. Your IRA beneficiary form names your daughter directly. The beneficiary form wins, and the trust gets nothing. This surprises people every week, because it feels like the will should be the master document. It is not. Retirement accounts pass by beneficiary designation, outside the will entirely. The inherited IRA trust beneficiary rules only come into play when you name the trust itself as the beneficiary, and then the trust has to clear a bar the IRS calls "see-through" status.
A trust is see-through when the IRS agrees to look through it and treat the trust's human beneficiaries as the IRA's beneficiaries. Without that status, the trust is just an entity that inherited an account, and it gets the worst payout rule: the 5-year rule, everything out within five years. With it, the trust generally gets the 10-year rule. Four tests decide which you get, and they are all about the trust document, not your intentions.
What are the see-through trust rules for an inherited IRA beneficiary?
1. The trust must be valid under state law. A properly drafted, executed trust. A handshake understanding is not a trust.
2. It must be irrevocable, or become irrevocable at your death. A revocable living trust qualifies because it becomes irrevocable when you die. That is the normal case and it is fine.
3. The beneficiaries must be identifiable from the trust document. The IRS needs to be able to determine who the beneficiaries are, and whether any of them is an eligible designated beneficiary, from the document itself.
4. The paperwork must reach the IRA custodian by October 31 of the year after your death. A copy of the trust, or a certified list of its beneficiaries, delivered to the custodian. Miss this deadline and the trust fails the test even if the document is perfect. This is the test that burns families who did everything else right, because nobody tells the trustee it exists until an advisor asks, usually too late.
| Scenario | Rule | Result |
|---|---|---|
| Trust passes all four tests, beneficiaries are adult children | 10-year | Empty by Dec 31, 2035; annual RMDs in years 1-9 if owner died after required beginning date |
| Trust fails the October 31 paperwork test | 5-year | Empty by Dec 31, 2030; no flexibility at all |
Conduit vs accumulation: the choice that changed in 2020
Once a trust is see-through, its own terms decide how the money flows, and here the SECURE Act rewrote the playbook. There are two classic designs.
A conduit trust forces every distribution straight through to the beneficiary. The IRA pays the trust, the trustee immediately writes a check to the person. Before 2020, this was the star strategy: it stretched distributions over the beneficiary's lifetime while keeping the money technically inside a trust. Now, with the 10-year rule, a conduit trust for non-eligible beneficiaries means the entire remaining balance must pass through in year 10, in one lump, taxed in one year. The pipeline you built for a lifetime stretch becomes a tax bomb with a timer on it.
An accumulation trust lets the trustee hold distributions inside the trust instead of passing them through. That control comes at a price: money retained in a trust is taxed at trust income tax rates, which hit the top bracket at a very low income threshold. Keeping $100,000 inside an accumulation trust can mean paying nearly four times the effective rate the beneficiary would have paid receiving it directly.
My honest opinion: if your trust was drafted before 2020 with conduit language, have an estate attorney re-read it. The strategy it was built for no longer exists, and the document may now be doing the opposite of what you wanted. This is not a form you update yourself. It is a one-hour attorney review that can save a six-figure tax mistake.
Model the RMDs on your inherited IRA
Enter the balance and beneficiary type to see the 10-year payout schedule under current rules.
Run your own numbers with the free calculatorFrequently asked questions
What happens if the trust is not see-through?
The trust is treated as a non-designated beneficiary and the 5-year rule applies: the entire inherited IRA must be emptied by December 31 of the fifth year after the owner's death. There is no 10-year option and no annual flexibility beyond that deadline.
Can a trust beneficiary still stretch distributions over a lifetime?
For owners who died after 2019, no. The stretch is gone for non-eligible beneficiaries. A see-through trust gets the 10-year rule, and only trusts whose beneficiaries are all eligible designated beneficiaries (a narrow category) get lifetime treatment.
What is the October 31 deadline for trust beneficiaries?
By October 31 of the calendar year after the IRA owner's death, the trustee must deliver a copy of the trust instrument (or a certified beneficiary list) to the IRA custodian. It is one of the four see-through tests, and missing it drops the trust to the 5-year rule.
Conduit or accumulation trust: which is better now?
Neither is universally better. A conduit trust risks forcing the entire balance out in year 10 as taxable income to the beneficiary. An accumulation trust avoids that but pays steep trust tax rates on retained funds. The right answer depends on the beneficiary's tax bracket, age, and spending discipline, which is why this is attorney territory.
Can a minor child inherit through a trust and get eligible beneficiary treatment?
A properly drafted conduit trust for the account owner's minor child can use eligible-designated-beneficiary rules: lifetime distributions until the child reaches majority, then the 10-year clock starts. The trust document has to be built for this specifically.
Related: Eligible Designated Beneficiary Rules for an Inherited IRA · Do You Have to Take Annual RMDs During the 10-Year Rule? · Inherited IRA Tax Strategy for the 10-Year Rule · Successor Beneficiary and the Inherited IRA 10-Year Rule
One practical money idea a week: subscribe to the newsletter.