
Who Is an Eligible Designated Beneficiary?
The five EDB categories, the age-21 rule for a deceased owner’s child, and the disability, chronic-illness, and documentation details that change the RMD path.
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Who counts as an eligible designated beneficiary, a designated beneficiary, or neither — the classification that determines every other rule.

The five EDB categories, the age-21 rule for a deceased owner’s child, and the disability, chronic-illness, and documentation details that change the RMD path.
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Key operational differences for someone inheriting an IRA from a parent, sibling, friend, or other non-spouse owner.
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An adult son or daughter is not automatically an eligible designated beneficiary. Here is the classification test that determines whether the 10-year rule applies.
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The owner’s minor child can receive eligible-designated-beneficiary treatment, but the final regulations start a new 10-year clock when the child reaches age 21.
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A beneficiary can be a legal minor and still miss the SECURE Act minor-child EDB exception because that exception is tied to the deceased owner’s child.
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The disability EDB rule turns on the beneficiary’s condition at the owner’s death, with a Social Security safe harbor and special documentation rules for employer plans.
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How the chronically ill EDB category works, what the health-care-practitioner certification is for, and why the status must exist at the owner’s death.
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This EDB category is based on exact dates of birth, not calendar-year ages or family relationship. A sibling, friend, or older beneficiary may qualify.
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An older beneficiary can satisfy the “not more than 10 years younger” EDB test, but the owner’s remaining life expectancy may still control the annual denominator after death.
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The final regulations use the tax-code definition of child, which can include a stepchild, adopted child, and eligible foster child—but not every younger relative.
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A non-spouse inherited IRA is a distribution account tied to the deceased owner; it is not an extra personal IRA contribution bucket.
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