Norgate said the transtasman institute would get the chartered accountant designation back to the pre-eminent position that was warranted by its entry standards.
"What's tended to happen over the last generation is we've probably only had a high level of engagement with about a quarter of our members - the rest are just happy to have the brand and the designation supported, but don't look to the institute for anything else," he said. "We really do need to increase our relevance to the rest of our members."
Norgate said the merged organisation would have 3000 members based in Asia, but neither institute currently had a physical presence in that part of the world.
"We'll open offices in Kuala Lumpur, Singapore and Hong Kong to support members in that region as part of really being relevant to those members."
Institute of Chartered Accountants Australia president Tim Gullifer said members and the businesses they served would benefit from a larger institute with greater scale, increased policy formulation and advocacy capability, as well as global influence.
"We recognise that the memberships are likely to get increasingly diverse. The timing for the establishment of a new institute is right. We need to stay ahead and further strengthen the brand and services we offer to members," said Gullifer.
Norgate said his experience in major corporate mergers - such as the 2001 creation of Fonterra, which combined the New Zealand Dairy Group, Kiwi Co-operative Dairies and the New Zealand Dairy Board - would prove helpful in establishing the new chartered accountants' institute.
"I guess I'm used to all the issues that can get in the way of making these things work," he said.
Both institutes will be consulting with members over the next few months and - if there is widespread support - members will vote on the proposal later this year.