Dear HR CLAL,
Some additional comments on the issue following Mr. V.M.L's reply. You have mentioned about CTC summing up to Rs. 20,000.00 per month. But CTC is an all-inclusive cost of employment which comprises the components falling under the definitions of the term wage under both the ESI Act, 1948, and the EPF Act, 1952, and the excluded ones too. Therefore, the threshold wage under the ESI Act, being above the CTC, means neither the employee nor the employer has any choice in the enrollment.
Regarding enrollment into EPF, the wage threshold is Rs. 15,000.00 per month only. Out of the CTC of Rs. 20,000.00 per month, if the components constituting wages are Rs. 15,000.00 or below, then there is no choice to be outside the EPF. Moreover, if he is already a member of the EPF, then he has to continue, of course, limiting the contribution to the threshold amount of wages.