Dear Parul,
Gratuity is calculated after completion of 5 years of service. It is calculated based on the basic salary. For example, if an employee's basic salary is Rs 25,000 per month and their service period is 5 years, the calculation will be as follows:
Basic salary: Rs 25,000
Daily wage: Rs 25,000 / 26
Gratuity amount: Rs 25,000 / 26 * 15 * 5 = Rs 72,115
Regards,
Pankaj