An annuity protects you from the risk of outliving your money and helps to cover basic expenses in retirement. In exchange for a lump-sum premium, an insurance company – like Sun Life – guarantees to pay you an income for life or as long as the annuity contract specifies. Your income will be secure from both market and interest rate risks – and, if you buy your annuity with non-registered savings, you could also benefit from tax savings.