Authorised person of a stock exchange have to pay 18%GST??9%CGST AND 9%SGST. Please advise and assist in understanding the effect of GST on Existing Sub â€“ Brokers / Authorised Persons of stock broking houses and stock brokers. Under the old ambit of Service Tax, Sub â€“ Brokers / Authorised Persons of stock brokers, were not liable to charge any service tax to customers as services of Sub â€“ Brokers / Authorised Persons were exempted. Please help in seeking clarification as sub brokers and authorised person only provide service. SUB BROKERS DO NOT CHARGE ANY SERVICE TAX OR GST ON THE CONTRACT NOTE. THE END CUSTOMER PAYS THE NET CONTRACT NOTE VALUE WHICH IS INCLUSIVE OF SERVICE TAX TO THE BROKER DIRECTLY. THE CONTRACT NOTE IS ISSUED DIRECTLY BY THE BROKER.