The gender pay gap is the biggest it has been in 10 years, according to new data from Statistic New Zealand.
The quarterly employment survey shows the gender gap has increased in the year to September by 1.3 per cent, from 12.85 per cent to 14.18 per cent.
Pay Equity Challenge Coalition said it was the biggest gap it had seen in a decade.
"It's a huge jump," said spokeswoman Angela McLeod.
"You would think that if the overall rate had gone up - quoted at 1.1 per cent - that the gender pay gap wouldn't be affected. You'd hope."