The main type of defined benefit scheme. The pension is a proportion of final salary based on an accrual rate, e.g. onesixtieth, for each year of scheme membership plus any added years. Forty years produces the maximum allowable pension. Scheme trustees must ensure that contribution levels are sufficient to deliver the pensions promised. Members can commute part of their rights into a tax-free lump seem equal to 1.5 times the final salary. See FINAL PENSIONABLE SALARY; FINAL REMUNERATION.