Employment Litigation · Primary-source case analysis

Kentucky Retirement Systems: Age as a Pension Factor Was Not Necessarily Age Discrimination

By Aneeta Mishra and Timothy Chan

Published May 10, 2026 · Updated October 17, 2026

Decision: Kentucky Retirement Sys. v. EEOC, 554 U.S. 135 (2008).

Kentucky Retirement Systems v. EEOC was decided by the Supreme Court on June 19, 2008. It distinguishes this disability-pension calculation from intentional age discrimination.

The plan imputed service for some disabled workers

Kentucky’s plan added years of service for workers who became disabled before reaching normal retirement eligibility, but not for workers already eligible for ordinary retirement.

Pension status and age were analytically distinct

Age helped define retirement eligibility, yet the challenged calculation turned on pension status and years of service. The Court required proof that age itself actually motivated the less favorable treatment.

The surrounding features cut against age bias

The plan did not use age as a simple proxy for diminished capacity and could disadvantage or advantage workers of different ages depending on service history. Its purpose was to provide disabled workers a pension benchmark.

The Court rejected liability on the presented record

The Court reversed the appellate judgment that had allowed the Equal Employment Opportunity Commission’s (EEOC) case to proceed. It did not hold that every age-linked benefit rule is lawful; evidence that age itself caused different treatment can produce a different result.

Key takeaways

• Map every plan variable: age, service, eligibility, and disability.
• Ask whether age itself caused the disadvantage.
• Examine the plan’s design and practical pattern.
• Analyze benefit-plan claims under the current statutory text.