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TRS details Tier 1 retirement eligibility, benefit formula and timing options
Summary
Teachers' Retirement System (TRS) staff reviewed Tier 1 eligibility, how service credit and final average salary determine pension amounts, early‑retirement reductions, the 75% maximum, and the Accelerated Annual Increase (AAI) option for members retiring by June 30, 2026.
Nick Stabler, a presenter for the Teachers' Retirement System (TRS), outlined Tier 1 retirement rules, how benefits are calculated and choices members can make about timing and optional purchases of service credit.
Tier 1 membership applies to educators who established public service in Illinois before Jan. 1, 2011. TRS is a state agency administered by a 15‑member board of trustees that administers benefits set in the Illinois pension code and invests member and state contributions in a trust fund, Stabler said. “We are a state agency. We are a public pension system. We are a defined benefit pension plan,” Stabler said.
The nut of the Tier 1 benefit calculation is: years of service credit × a factor (2.2% for service after July 1, 1998) × final…
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