wealthschema / benchmark / items / fb-rmd-0012
ITEM PROVENANCE · RMD-MECHANICS

fb-rmd-0012

status: publishedversion: v1corpus: 2026.9key: derivedseverity: medium
Scenario (all facts stipulated)
{
  "person": "401(k) participant born August 2, 1962",
  "question_context": "The participant asks at what age required minimum distributions must begin under section 401(a)(9)."
}
Question posed to the model under test

Under the current regulations, what is this participant's applicable age for required minimum distributions? Answer with exactly one option id.

Answer options
  • age-70-halfAge 70½
  • age-72Age 72
  • age-73Age 73
  • age-75Age 75
Answer key

age-75

Derivation from the cited text

The participant was born August 2, 1962, which is on or after January 1, 1960. Under 26 CFR 1.401(a)(9)-2(b)(2)(vi), the applicable age for an employee born on or after January 1, 1960 is age 75. Age 73 applies only to the 1951–1958 birth band under paragraph (b)(2)(iv).

Rubric

Selects age-75 based on the born-after-1959 rule.

Cited primary sources (quote-gated)
In the case of an employee born on or after January 1, 1960, the applicable age is age 75

Each quoted passage is exact-matched, after typographic normalization, against the corpus text fetched from the issuing authority (hashes in the corpus manifest). An item whose quote stops matching fails the build.

Verification record
generator: claude-fable (session 2026-09-01)disagreements: 0controls: fb-2026-09-a (5/5 caught)adjudicated by: — (none required or pending)
gemini-3.1-pro-previewagrees the key is correctquote matched
In the case of an employee born on or after January 1, 1960, the applicable age is age 75.cfr-1-401a9-2

The participant was born on August 2, 1962, which is after January 1, 1960. According to 26 CFR 1.401(a)(9)-2(b)(2)(vi), the applicable age for an employee born on or after January 1, 1960, is age 75. The key correctly identifies this.

deepseek-v4-proagrees the key is correctquote matched
In the case of an employee born on or after January 1, 1960, the applicable age is age 75cfr-1-401a9-2

The stipulated birth date August 2, 1962 falls on or after January 1, 1960, so paragraph (b)(2)(vi) directly sets the applicable age to 75. The key's value age-75 is correct.

Version history & errata

v1; no errata. Demonstrate a key error and the correction is published here, credited — challenge policy.