Sign up on ESIC's employer portal once a covered establishment has 10 or more employees (20 for some establishments where the Centre extended coverage): registration is fully online and real-time, the employer code number appears on submission and the C-11 registration letter arrives by email, with no physical documents. IndiaFilings, which charges from ₹7,899 to do it, says to register within 15 days of crossing the threshold, and once covered you cannot leave if headcount drops. Cover every employee earning up to ₹21,000 a month (₹25,000 for persons with disability). You pay 3.25% of their wages and they pay 0.75%, deposited monthly through the same portal, and an employee earning a daily average up to ₹176 pays nothing while you still pay your share.
ESIC's step-by-step help file with screenshots: registration is fully online and real-time, generates the code number on submission and emails the C-11 registration letter, with no physical documents needed.
ESIC's page on who must register: non-seasonal factories and, by state extension, shops, hotels, restaurants and other establishments employing 10 or more (20 where the Centre extended it), and the wage limit of ₹21,000 a month (₹25,000 for persons with disability).
The current contribution rates: 3.25% of wages from the employer and 0.75% from the employee, with employees on a daily average wage up to ₹176 exempt from their share.
A service page listing who is covered, the documents, and that an employer must register within 15 days of crossing the threshold; its own fee starts from ₹7,899.