Revenue Minister Stuart Nash has confirmed GST will be imposed on online purchases, a measure the previous government was working on before the election.
He told NewstalkZB on Wednesday it would "absolutely" happen because it was the right thing to do.
Mr Nash's officials are working on ways to introduce it.
So far there's no timeline.
Retail NZ welcomed the confirmation.
"For many years, New Zealand retailers have been disadvantaged by the fact that they have to pay GST while foreign websites don't," the organisation said.
It's asking Mr Nash to introduce it on July 1 next year, the date Australia will bring it in.