The survey comes ahead of second-quarter gross domestic product and current account data this week, which are expected to show the pace of New Zealand's economic growth slowed in the three months ended June 30.
Westpac's Stephens said households are still cautious about their personal finances, but are more upbeat for the coming year.
"That bodes well for an ongoing gradual expansion in domestic spending," he said.
Households have been eschewing new spending over the past couple of years, using the low interest rate environment to repay debt. That's held back the country's economic recovery, though record-high prices for locally produced raw materials are expected to start seeping into spending behaviour at some point.
McDermott Miller's managing director of strategic planning consultancy, Richard Miller, said the survey showed 18- to 29-year-olds were the most confident age group at 126.4, followed by the 30- to 49-year-old bracket at 113.9, then over 50s at 105.6.
Miller said the main reason people were upbeat about the coming year was that the recession won't be as bad as previously thought, tax cuts will have a positive effect, and global conditions will improve.
Private sector consumers were less pessimistic about the next 12 months than public sector employees, though they were equally optimistic about the country's economic conditions on a five-year horizon.