The Minister in charge of the Government's Infrastructure Investment Summit says deals will mostly be done in the coming weeks, months and years ahead.

More than a hundred companies, managing about six trillion dollars in capital, are at the Government's two day summit in Auckland.

But Chris Bishop says there's already been one tangible commitment from Australian investor Plenary group.

"They've promised to set up a New Zealand office here and they've promised to bid on the next five PPP opportunities that come up - that is a commitment that they have just made, I think, in the last 24 hours, on the basis of what they heard at the summit and in the leadup to it. So that's good."

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