The Treasury's monthly update showed economic indicators in the December quarter "have been mixed", noting the slump in business confidence possibly reflected "uncertainty in the election and government formation period", whereas consumer confidence was still at a high level despite declines and spending on electronic cards "suggested little sign of a consumption slowdown".
It also said core crown tax revenue to the end of November was $500 million above its latest forecasts.
The government agency noted November building consents recovered from weakness in September and October, although "further strength is needed before we can expect residential investment growth in the first quarter of 2018", it said.
The Treasury said recent volatile weather conditions would likely have a small impact on overall output in the near term, although it will vary across regions and industries. Meat export volumes rose in December but dairy volumes were weak, it said.
The government department predicted a smaller current account deficit in the December quarter, with goods export values up 8.6 per cent, partly driven by exports of dairy, logs and meat.
"In the near term, this outturn suggests the goods deficit will narrow in the December quarter, supporting a further narrowing of the current account deficit," it said.
The annual current account deficit narrowed from $7.4 billion in the June quarter to $7.1b in the September quarter, but was wider than Treasury expected.