However, the number of appointments had declined over the past 18 months.
Mr Brown said he had not noticed high levels of insolvency in any one sector.
"Our appointments have been across the board, that is one of the interesting factors this time round. Retail has been, and is still, struggling but many of them just self-liquidate - close down, pay out what they can and move on without a formal liquidation procedure - or they weren't companies in the first place."
This week, RHB merged with the Tauranga branch of accountancy firm BDO. The move was the fourth merger among local accounting firms since January.
KPMG partner Tracy Preston-Lett said difficult trading conditions over the past five years had forced many businesses to either adapt and consolidate or call it quits.
"I think the reality is that people have adapted to the new norms of doing business and are being much more strategic in how they think about growth.
"Mergers and acquisitions with competitors and strategic alliances are becoming more commonplace. This can lead to some redundant entities being wound up, and have an impact on the results reported."
Business insolvencies were a sign of the times, but also part and parcel of the lifecycle of business, Ms Preston-Lett said.
"The statistics on business survival reinforce that it really comes down to survival of the fittest."
Tauranga Chamber of Commerce chief executive Max Mason said declining numbers of insolvencies supported other data which showed the local economy was improving.
"There are always going to be births and deaths in our free market economy and, while personally painful for some, it's the best system there is," he said.