"Confidence may not be the economic engine that drives growth [ultimately incomes do], but it's critical for keeping the economic wheels turning," Bagrie said. "Lacking confidence, firms don't invest, or take a punt on that new employee. Activity can grind to a halt. That's a growing risk."
Strong growth over the past couple of years is expected to slow down as slumping global dairy prices erode dairy export receipts, and as the tailwind from the Canterbury rebuild starts tapering off.
Although it was gloomy, Bagrie said New Zealand was not out of bullets yet.
"We have a good macro framework - The New Zealand dollar has the capacity to keep dropping and the Reserve Bank has the capacity to drop rates a long way so we have ammunition we can throw at this thing, so we're not talking panic stations," he said. "But if the China story starts to go pear-shaped, that's when they'll start to talk about the Reserve Bank taking the cash rate to 1.5 or 2 per cent, but we do have the capacity to shore things up if the economic headwinds start to intensify."
Yesterday's survey was the fifth monthly decline in business confidence and its second in negative territory, with agriculture the most downcast among the sub-sectors.
A net 39 per cent of respondents see a contraction in livestock investment, compared with a net 8.3 per cent a month earlier, while a net 9.4 per cent of firms see commercial construction intentions shrinking, compared with a net 6.6 per cent in July.
Residential work is still seen expanding, with a net 12 per cent of firms positive on the sector's outlook, up from a net 6.2 per cent a month earlier.
Of the 473 respondents, a net 0.4 per cent expect investment to contract, compared with a net 11 per cent seeing expansion a month earlier, while a net 2.8 per cent plan to take on new staff, down from 9.3 per cent in July.
A net 11 per cent of firms anticipate exports increasing over the coming year, down from 19 per cent a month earlier.
Bagrie said a lower New Zealand dollar and falling interest rates should help stabilise the economy, and dairy prices have shown signs of recovering after their freefall through the first half of the year.
"We need to keep Chicken Little in the coop - the last thing New Zealand needs at present is to talk ourselves into a funk.
"But there are some real reasons for business to be a lot more cautious today compared to six to 12 months ago, and we can't ignore those because those challenges are real."
Gloomy feeling
•Net 29% pessimistic about general economic outlook.
•Net 1.5% expect profits to fall.
•Net 9.4% see commercial construction intentions shrinking.
•Net 41% see the unemployment rate rising.
- additional reporting BusinessDesk