A staggering $533 million of this was paid for on credit.
Finder's global editor-in-chief Angus Kidman said the Christmas splurge would leave many Kiwis with a tough January.
"The pressure to overspend has left many nursing a New Year 'financial hangover,'" he said.
"January is when credit card and other bills begin to land, leaving many regretting what they've spent on Christmas," he said.
SpendHalf of the population dug into their savings to finance their Chrismas expenses.
Around 32 per cent used a credit card to pay for Christmas, while eight per cent relied on buy now pay later schemes.
Around 4 per cent were planning on taking out a loan to tide them over, and a cash-strapped 3 per cent needed to borrow money from friends and family.
Kidman said that the cost of Christmas will roll over well into the new year.
"It's always advisable to pay off your credit card balance as soon as possible. That way it's not sitting there building up interest.