After premiums are paid for a certain defined period or beyond and if subsequent premiums are not paid, the sum assured is reduced to a proportionate sum, which bears the same ratio to the full sum assured as the number of premiums actually paid bears to the total number originally stipulated in the policy. For example, if sum assured is 1 lakh and the total number of premiums is payable is 20 (20 years policy, mode of premium is assumed yearly) and default occurs after 10 yearly premiums are paid, the policy acquires the paid up value of 50,000/-. Paid up Value = No. of Premiums Paid / No. of Premiums Payable X S.A=10/20 X 100000 = 50000/-. This means that the policy is effective as before except that from the date the 11th premium was due, the sum assured is 50,000/- instead of original 1,00,000/-. To this sum assured the bonus already vested (accrued) before the policy lapsed, is also added. Example if the bonus accrued up to the date of lapse is 35,000/-, the total paid up value is 50000 + 35000 = 85000.