How much is the broker’s fee for RTBs? February 28, 2020 02:46 Updated None. There is no transaction fee for the primary issuance of RTBs. Related articles How much is the broker’s fee? What will be my proof of ownership for RTB? How much am I charged for every transaction? Can I trade/sell Retail Treasury Bonds (RTB) and Retail Dollar Bonds (RDBs)? How? Can I sell partial amounts of the RTB?