The arrival of the Lions in Canterbury last weekend boosted the economy with an extra $600,000 spent.
The latest data from payments company Paymark showed spending through bars, cafes and accommodation providers increased by 11.8 per cent for the weekend of Saturday and Sunday when the Lions played the Crusaders, compared with the previous weekend.
Paymark said the increase was across the whole weekend.
"The Lions game is likely to be the key contributor to this spending boost," Paymark said. "The extra payments largely took the form of more spending at restaurants, cafes, pubs, bars and clubs from around 11am on Saturday through to the early hours of Sunday morning," it said.
"The only hour when payments were not higher during this period was between 9 and 10pm Saturday."