If you're living in New Zealand, there hasn’t been much of a reason to pay off more than the minimum repayment amount on your student loan - until recently.
If you leave New Zealand for 6 months or more, you will generally have to pay interest on your student loan (currently 6.6%).
Changes to the student loans scheme this year mainly affect overseas borrowers, who will now pay less, or in some cases no, interest on their loans.