The IAS officer joins as a probationer. He is in PB3 15600-39100 + GP 5400.
He salary would be around 40,500=(pay15600 +GP5400 +18900+600).
During probation: Of this around 10,000 would be mess bill. A percentage would be retained to be paid by state later.
In short: He would get around 20,000 in hand.If the probationer
A number of questions in quora and in wiki's which clearly explain this. There are many aspirants who does a guesstimation of salary. Just calculate the Pay+Gradepay+allowance+DA) and its the salary of any job.