BNZ data shows total online spending was up 13 percent compared to the previous year.
Local merchants experienced a spending increase of 12 percent. More Kiwis seemed to be choosing to shop online rather than instore, as Statistics New Zealand figures showed electronic card transactions in stores only increased four percent in core retail industries.
Food categories were particularly popular, with online spending up by well over 20 percent.
Other domestic retail categories that performed well over the Christmas period included sports and camping equipment, department stores, newspapers and books and entertainment media.
Meanwhile, overseas merchants experienced a 15 percent spike.
Spending on overseas sites was particularly strong in the computer and entertainment media categories, which were both up by more than 40 percent compared to December 2014.
Clothing sales were also up 17 percent on the year previous.
This is in line with ecommerce company eStar’s findings, which saw its customers’ online transactions grow by more than 300 percent over the Christmas and Boxing Day period.