The agreement will see Sportsbet broadcast and take bets on British and Irish racing.
The deal will also see thoroughbred racing – which is already shown on Tabcorp’s Sky Racing network in the TAB app, in venues and homes – streamed on Sportsbet’s digital platforms.
RMG is owned by 34 British racecourses, while SIS holds the rights to all 26 Irish racecourses and Chelmsford City.
“We are delighted to team up with Sportsbet and grateful to our long-standing partners, Tabcorp, for helping to facilitate the partnership through broader distribution of its Sky Racing channel,” RMG commercial director Nick Mills said.
“This is a very exciting opportunity to increase the shop window for our racecourses, as well as generate additional international revenue.”
Paul Bittar, general manager of sports partnerships at Sportsbet, added: “We are really excited to be able to conclude this deal with RMG and SIS in order to bring live streaming of British and Irish racing to our huge Australian customer base.
“Sportsbet is always seeking to bring excitement to life for our customers and striking this deal on high-quality racing content supports this goal. We are also pleased to be able to support the sustainability of the British and Irish racing industries through new revenues.”