This paper explores the introduction of collective risk-sharing elements in defined contribution pension contracts. We consider status-contingent, age-contingent and asset contingent risk-sharing arrangements. All arrangements raise aggregate welfare, as measured by equivalent variations. While working individuals hardly benefit or may even lose, retirees experience substantial welfare gains. An increase in the tax deductability of pension contributions can bebene?cial for working cohorts, but comes at the cost of a reduction in aggregate welfare due to efficiency losses.