Minor Child Inherited IRA Rules: EDB Stretch, Age-21 Trigger, and the 10-Year Window

A minor child who inherits a parent's IRA doesn't face the same 10-year depletion rule that applies to adult beneficiaries — but the stretch protection is temporary. Here's how the two-phase rule works, when the clock starts, and what annual distributions look like at each stage.

Who qualifies as a "minor child" under this rule

Two conditions must both be met:

1. The relationship must be direct

The beneficiary must be the biological or legally adopted child of the IRA owner — not a grandchild, stepchild without formal adoption, niece, nephew, or any other minor relative.¹

This is a common misconception. A grandparent who names a grandchild as IRA beneficiary does not create an EDB minor child. The grandchild will face the standard 10-year rule (or even shorter if they're not a designated beneficiary). Only a direct child — the IRA owner's own son or daughter — qualifies.

Stepchildren qualify if legally adopted. A child the decedent stood in loco parentis for does not automatically qualify unless adoption occurred.

2. "Minor" means under age 21 — not your state's age of majority

The IRS defines "minor" specifically as under age 21 for inherited IRA purposes (IRC § 401(a)(9)(F)).¹ This overrides state law. In most states, the legal age of majority is 18 — but for inherited IRA calculations, the EDB stretch continues until 21, not 18.

The child must be under 21 at the time the IRA owner dies. If the child has already turned 21 by the date of death, they are treated as an ordinary non-EDB beneficiary and the 10-year rule applies immediately — no stretch phase.

Phase 1: EDB stretch distributions during minority (before age 21)

While the child is under 21, they are treated as an EDB and distributions are calculated using the Single Life Expectancy Table (IRS Publication 590-B, Appendix B, Table I) — the same table used by surviving spouses and other EDBs.²

How to calculate the first-year RMD

1. Find the child's age as of December 31 of the year following the IRA owner's death.
2. Look up that age in Table I of IRS Pub. 590-B to get the life expectancy factor.
3. Divide the prior December 31 account balance by that factor. The result is the minimum distribution for the year.
4. In each subsequent year during minority, reduce the factor by 1.0 (the fixed reduction method for non-spouse EDBs).

Annual RMDs during the stretch phase are always required — they are based on life expectancy and not subject to the "annual RMD only if decedent past RBD" nuance that applies during 10-year windows (covered below). A child who is an EDB always owes an annual RMD during their stretch phase.

The age-21 trigger: when the 10-year clock starts

When the minor child reaches age 21, they transition from EDB status to the standard SECURE Act 10-year rule. Per IRC § 401(a)(9)(H)(ii), the 10-year window opens on the beneficiary's 21st birthday — not on the original date of the IRA owner's death.¹

The full depletion deadline is December 31 of the year that contains the 10th anniversary of the child turning 21. If a child turns 21 in 2033, the inherited IRA must be fully depleted by December 31, 2043.

If the child was age 20 at the parent's death, they get only a single year of stretch before transitioning. If they were 1, they get two decades of stretch distributions before the 10-year countdown begins.

Phase 2: Annual RMDs during the 10-year window

Whether annual minimum distributions are required during the 10-year window after age 21 depends on one fact: had the original IRA owner reached their Required Beginning Date (RBD) before they died? This is the T.D. 10001 rule, finalized by the IRS in July 2024.³

If the original owner died before their RBD (most common for younger parents)

The owner had not yet started RMDs. In this case, no annual minimums are required during the 10-year window — the child only needs to fully deplete the account by the end of year 10. They may take distributions at whatever pace they choose, including nothing in years 1–9 and the full remaining balance in year 10. (That approach is almost always tax-inefficient, but it's allowed.)

If the original owner died after their RBD (age 73 or 75 depending on birth year)

The owner had started RMDs. In this case, annual distributions are required during the 10-year window — using the child's own Single Life Expectancy factor as of their 21st birthday (reduced by 1.0 each subsequent year). Full depletion is still required by the end of year 10, so the child must take both the annual minimum AND ensure the account is zeroed out by the 10-year deadline.³

Full example: 9-year-old inheriting a $600,000 IRA

Scenario: Parent dies in 2025 at age 76 (past RBD). Child is 9 at parent's death. Inherited IRA balance: $600,000. Assumed growth rate: 6%.

Stretch phase (2026–2036, child ages 10–20):

• Year 1 (2026): Child is 10. Single Life Expectancy factor ≈ 73.6. RMD = $600,000 / 73.6 ≈ $8,152.
• Annual factor decreases by 1.0 each year; RMDs grow slowly as balance compounds.
• After 11 years of small stretch distributions, the account has grown despite RMDs — estimated remaining balance near $860,000 at age 21, depending on growth and actual RMD amounts.

Age-21 trigger (2037): The 10-year window opens. Child now has until December 31, 2047 to fully deplete the account.

Because the parent died after RBD, annual RMDs are required during the 10-year window. The factor resets using the child's Single Life Expectancy at age 21 (approximately 62.6), reduced by 1.0 each year. The child must also ensure the account is zeroed by December 31, 2047.

In practice: a specialist advisor would model whether to take uniform distributions across the 10 years, front-load during low-income years (perhaps early in a career), or back-load later. With a large inherited balance and the child entering the workforce, tax bracket planning during the 10-year window is substantial.

Custodial account requirements for minors

A minor cannot own an IRA directly. Until the child reaches the age of majority under state law (typically 18 or 21), the inherited IRA must be managed by a legal guardian or custodian:

• Court-appointed guardian or parent: In most cases, a surviving parent can act as custodian of the inherited IRA on behalf of the minor child, with authority to manage the account and take annual RMDs.
• UTMA custodianship: Some custodians require an UTMA (Uniform Transfers to Minors Act) account structure or court-approved guardianship depending on state law and account size. Verify with the IRA custodian when opening the account.
• Trust as beneficiary: If the IRA was left to a trust for the benefit of a minor child, the distribution rules depend on whether the trust qualifies as a see-through trust. A properly drafted conduit trust naming a minor child beneficiary can preserve EDB status through the trust. See Trust Beneficiary Rules for details.

The inherited IRA must be titled correctly: "[Decedent's name], deceased, IRA FBO [Child's name]". The "FBO" (for benefit of) designation and the year of death in the account title are required for the account to be treated as an inherited IRA rather than a new contribution.

Planning considerations for families

Tax rate arbitrage across the timeline

A minor child's stretch phase often coincides with low income years — childhood, high school, college. Even though each annual stretch RMD is taxable income, the amount is small enough that it likely falls into the lowest tax brackets (or even the 0% rate if the child has no other income and the kiddie tax doesn't apply).

The kiddie tax: Children under 19 (or full-time students under 24) owe taxes on unearned income above a threshold at the parents' marginal rate, not the child's rate — this is the "kiddie tax" under IRC § 1(g).⁵ Inherited IRA distributions are earned income for this purpose — they are not investment income subject to the kiddie tax. Annual RMDs from an inherited IRA are taxed at the child's own rate, not the parents'. This is favorable.

The 10-year window falls during working years

For a child who inherits at a young age, the 10-year depletion window typically starts when they are 21 and ends at 31 — prime earning years. Distributions from the inherited IRA during those years stack on top of employment income. A child who earns $120,000 at 27 and must also take $80,000 from an inherited IRA will likely be in the 22–24% bracket on all of it.

This makes early planning during the stretch phase valuable. A specialist can model whether accelerating some distributions during lower-income stretch years (even beyond the minimum) reduces total lifetime taxes — even though it shortens the tax-deferred growth period.

What if the child has no other income?

A full-time college student with no other income may be in the 10% or 12% bracket. Taking larger distributions during these years — voluntarily, above the stretch minimum — can be a favorable tax strategy if the alternative is taking larger distributions during peak earning years in the 22–32% bracket.

Does the inherited Roth IRA work differently?

Yes, in the child's favor. An inherited Roth IRA has no annual RMD requirement during the stretch phase (because Roth IRA owners have no RBD and no lifetime RMDs, there is no post-RBD annual RMD rule to inherit). The child must still deplete within 10 years of turning 21, but during both the stretch phase and the 10-year window, distributions are tax-free (assuming the 5-year holding period is met). See Inherited Roth IRA Rules for the 5-year clock interaction.

Naming a successor beneficiary

The minor child should name their own successor beneficiary on the inherited IRA once they reach the state's age of majority and can enter contracts. If the child dies before depleting the account, the successor beneficiary inherits whatever remains in the 10-year window. See Successor Beneficiary Rules.