The survey showed a drop from the previous quarter's $87.1 million total.
Liz Fraser, IABNZ chair, said advertising spend traditionally drops in quarter one versus quarter four due to seasonal changes.
"This is consistent for the last two years and is experienced by most other media, if not all."
The biggest grower was classified advertisements, leading the first quarter with a 16.57 per cent year-on-year increase and a 10.44 per cent quarter-on-quarter increase.
It was followed by search and directories, with a 15 per cent rise, and display advertisements, at 9 per cent. Both of these groups fell from the previous quarters.
Spending for online video advertising increased by 21% year-on-year.
A key reason for growth is the increasing popularity of social media platforms, said Chris Perree, a partner at PwC.
"As the New Zealand market continues to embrace online advertising, educating advertisers on the relevance and benefits of online advertising is crucial," he said.
"This is particularly relevant with advertising agencies providing marketing packaged solutions that deliver across the various channels within online advertising."
Advertisers can deliver messages to a targeted audience by understanding the benefits of each respective channel, Perree said.
"For example, the use of social media supporting the brand and image of a company while using mobile advertising and location specific applications to deliver advertising to the customer."
Fraser said online advertising spend continues to climb as advertisers shift their marketing budgets to where their consumers are spending their time.