The Rugby World Cup has spent $60 million on hotels and other accommodation for teams and officials - adding to the country's income from the tournament.
But tournament boss Martin Snedden said the total benefits would only be known after it was over, and some intangibles could never be measured.
The World Cup has passed its halfway mark and enters its last weekend of pool play.
Snedden said the flavour of the tournament would soon see a shift in focus from rugby festivities to an "absolute winner-take-all" mentality.
"Every World Cup has two aspects to it. The first is the festival. The second is who's going to win the cup. And people are ready now for the final answer, and the anticipation is going to be really enormous."