Pension Reform III, effective November 16, 2011, created a new benefit structure for individuals who became members of Massachusetts public retirement systems on or after April 2, 2012. Because benefits are now based, in part, on an individual's membership date, the MTRS distinguishes between two "Membership Tiers."

Below are our two "retirement percentage" charts, which provide a comparison of the percentage of salary average allowed under the regular and RetirementPlus formulas, by service and age, for each Membership Tier.