That’s not brokerage, that’s comission which is paid by issuing company, not by investor.
When you are buying in market, you can see that it is trading at 995 currently in zerodha, but when you buy a brokerage will be added by zerodha (or your broker) so actual price will be slightly higher.
I understand you bought at discount, all I am saying is that depends on quantity you are buying. If you want to invest Rs. 50 lakhs, you will not be able to find that much quantity at discount in previous series. You might actually have to pay premium for that.
But you can easily get rs. 50 lakhs worth of bonds in ipo at face value.
That is the difference I am trying to convey.