How ESI Contributions are Calculated in India
Under the Employees' State Insurance Act 1948, ESI is mandatory for all non-seasonal factories and commercial establishments employing 10 or more persons where employee gross wages do not exceed statutory ceilings:
Employer Contribution = 3.25% × Gross Monthly Wages
Total Contribution = 4.00% deposited with ESIC
The ₹21,000 Wage Ceiling Rule & Mid-Period Increments
If an employee's gross salary is ₹21,000 or below at the start of a contribution period (April–September or October–March), they remain covered until the end of that specific six-month contribution period even if their wages exceed ₹21,000 mid-way due to an increment or promotion.
Exemption for Daily Wage Earners
Employees whose average daily wage is up to ₹176 per day are exempted from paying the employee's share (0.75%). However, their employer must still contribute the full 3.25% share on their behalf.