An official website of the State of Oregon
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*By law, Tier One members receive the PERS Board-adopted assumed interest rate in effect each calendar year. See OAR 459-007-0005 (11).
**Please note that starting in 2018, the investment strategy of the IAP changed from a one-size-fits-all approach to target-date funds (TDFs) that reduce investment risk and volatility as members age. In 2019, instead of a single earnings rate for IAP accounts, PERS will derive earnings rates across 10 TDFs. Because PERS only credits member IAP accounts as part of annual earnings crediting, non-retired members will not see investment returns until spring 2019 (reflecting calendar year 2018 returns). Learn more at
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