Mr.Kapoor, I differ a bit and would like to add to the answer. You have mentioned that your basic pay is Rs.17570/-. There is a component of VDA or DA (Dearness allowance) in pay. In other way, the emoluments which constitute your salary shall be reckoned for the purpose of calculation of your gratuity. so the gratuity will be = last drawn salary or pay (Only Basic+DA)/26 * 19 * 15. However, if there is no such component in addition to Basic pay, the calculation shown by Mr. Sumit & Mr. Abbas is correct.