Provident Fund

it is calcuated @ 12% on Salary (Basic + DA)  & Companies will have their own policy for fixing the basic salary and DA

it excludes.......

Any dearness allowance (that is to say, all cash payments by whatever name called paid to an employee on account of a rise in the cost of living), house-rent allowance, overtime allowance, bonus, commission or other similar allowance payable to the employee in respect of his employment or of work done in such employment;