Prime Minister John Key says the Government is only likely to fund another New Zealand bid for the America's Cup if Team New Zealand win the competition.
He said this afternoon that if captain Dean Barker's crew went on to win in San Francisco, the Government would have to consider what support it would provide.
Team New Zealand has a three-point lead over Oracle in the first-to-nine finals series.
The Ministry of Business, Innovation and Employment was already looking at what would be required to upgrade the Auckland viaduct if New Zealand hosted the competition again.
Mr Key said: "On the basis that they win the cup, then it's far more likely that we would be looking to make a contribution to another effort."