Lump sum payable is calculated with reference to the Commutation Table constructed on an actuarial basis. The monthly pension will stand reduced by the portion commuted and the commuted portion will be restored on the expiry of 15 years from the date of receipt of the commuted value of pension. Dearness Relief, however, will continue to be calculated on the basis of the original pension (i.e. without reduction of commuted portion).
The formula for arriving for commuted value of Pension (CVP) is
CVP = 40 % (X) Commutation factor* (X)12