Dear Rajiv,
ESIC deduction is a mandatory deduction for all employees whose gross income is below Rs. 15,001. However, there are certain industries and locations where ESIC is not applicable. Please find attached the details. Additionally, you can refer to Google and CITEHR for more information.
I have collected all these documents from CITEHR itself, posted by various members like you and me. Many thanks to CITEHR and its members. If you have any further queries, please do not hesitate to let me know.
Thank you.