ONE News can reveal the Government will decide whether to raise the minimum wage to either $15 or $15.25 an hour, from the current rate of $14.75.

Workplace Relations Minister Michael Woodhouse will take his recommendation to Cabinet early next month.

"We'll look at a range from less than that - from no increase - to a little bit more than that, and look at the impacts on business, jobs and those on the minimum wage," Mr Woodhouse says.

Cabinet advice last year said increasing the minimum wage to $15 or $15.50 an hour would cost between 1500 and 5000 jobs.

"There is a possibility the income can go up without a material impact on jobs. And that's the spot we're trying to achieve," Mr Woodhouse says.

Green Party co-leader Metiria Turei says $15 isn't enough.

"We need to make sure the minimum wage gets to about $18 by 2017.

"Keeping the minimum wage low keeps wages low overall and families are really struggling to get by," she says.