The amount of pension depends on how long your service was and what was your average salary. For those retiring after September 1, 2014, pension is calculated on the basis of the average salary of the last 60 months.
The pension formula is as follows: Monthly pension = (average salary × years of service) / 70
For example, if your average salary is ₹15,000 and you have served 25 years, your pension will be approximately ₹5,357 per month.