Most Tier 6 members are eligible for a service retirement benefit at age 63, or they can choose to retire as early as age 55 with a reduced benefit. However, your benefit, in most cases, will be greater under Article 15.This plan allows eligible employees to: Set aside money towards their retirement. Make Roth contributions that can grow tax-free. Increase your pension beyond the maximum amount payable under your retirement plan. You are not required to contribute toward your retirement benefits, but may elect to make voluntary annuity savings contributions to the Retirement System. However, in the OPR plan, the Commonwealth makes a matching contribution of 5 percent of regular compensation, minus certain benefit and plan expenses.