ESI contribution is payable on OT but not for EPF. Any payment made not on montly basis, viz, incentive, performance bonus, if made , say once in two months, or more, ESI is not payable. Certain expences reimbursed as shoe allowance, washing allwoance, (defrey), encashment of leave, Bonus/ exgratia payments also do not come under the definition of " wages" under ESI ACT.
HC Subbaramu
HR Consultant, Bangalore