Next year's Rugby World Cup is set to boost Birmingham's economy by £56 million as it hosts two matches and three teams.
The figure has been released in a new report compiled by Rugby World Cup 2015 and financial services firm EY ahead of the tournament which starts on September 18 with England v Fiji at Twickenham.
It was announced in August that double world cup winners South Africa would be based at the University of Birmingham, ahead of its clash with Samoa at Villa Park on September 26, while Sutton Coldfield RFC will host Samoa and Romania.
Villa Park will also be the venue for Australia v Uruguay the following day.
The report, entitled 'The economic impact of Rugby World Cup 2015', said: "Since its inception in 1987, the increasing scale and reach of Rugby World Cup has helped attract a globalised audience and provided each host nation with significant opportunities to attract international tourism, develop infrastructure, advertise itself to investors from around the world and leave a lasting legacy of growing participation at all levels and across a diverse player spectrum.
"Rugby World Cup 2015 will attract more international visitors than any previous (tournament), with up to 466,000 visits expected across the duration of the tournament.
"These visitors bring with them significant incremental spending to the host economy, from purchasing tickets to travel costs, accommodation expense, match day entertainment and in visiting other local tourist attractions.
"In total, international visitors are expected to contribute up to £869 million in direct expenditure.
"Investment in infrastructure for the tournament is expected to reach £85 million, bringing lasting benefits to the host cities."
Emma Gray, director of marketing services at leisure tourism programme Visit Birmingham, added: "Birmingham's two Rugby World Cup fixtures promise to be very special - adding to an impressive list of sporting events held here, from Ashes Tests to international athletics meetings.
"By hosting matches involving two leading rugby nations, Australia and South Africa, Birmingham is set to attract visitors from across the world - and their expenditure will help to generate over £50 million for the local economy.
"The city's name and image will be seen globally, providing a valuable opportunity to showcase Birmingham to key international markets."
Jerry Blackett, chief executive of Greater Birmingham Chambers of Commerce, said the membership group had seen a surge in sign-ups from athletic organisations, most recently rugby union team Wasps and Moseley Rugby Club.
"They want to use their membership to get much closer to business. This may be to form associations, obtain specialist financial advice or to promote their sport to the corporate world," he added.