First of all, can you confirm if you have worked continuously for 240 days every year? If there is any interruption within the 5 years of service (for example, if an employee attends 239 days in the 3rd year), then they will not be eligible for Gratuity.
Eligibility Criteria for Gratuity
Were you hired as a trainee when you joined the organization? Eligibility to claim Gratuity starts from the probation period. For instance, if an employee joins on January 1, 2007, as a trainee, completes probation on January 1, 2008, and resigns in February 2013, they will be eligible for Gratuity.
I worked at a Pvt. Ltd. Company from October 19, 2007, to July 17, 2012. This totals 4 years, 9 months, and 240 days. An employee must complete 5 years without any interruptions in service (as mentioned in point 2) to avail of Gratuity benefits. After completing 5 years, if an employee works an additional 6 months, the organization will provide Gratuity for 6 years.