Hi Udayasooriyan,
You will need to check first whether there is any Group Gratuity Fund created for your Organisation with any Insurance Company . The terms under such Scheme will need to be examined.
While the above calculation suggested by Mr.Nagarkar & Mr. Lakhera is as per the Gratuity Act, some Companies while creating the Gratuity Fund incorporate a provision in the Rules of the Scheme which have additional benefit in a death case.
For instance , we have created a Gratuity Fund with LIC which incorporates as provision that if an employee dies while on duty, the Gratuity calculation will also take into consideration the unserved years of service till his retirement. ie if an employee of 30 years dies, his date of joining is 2012 and the retirement age is 55 then calculation of gratuity includes calculation as per 5 yrs service rendered plus remaining 25 years of service remaining.
Hence ascertain what policies are framed under your Company's Gratuity Fund.