The Student Loan scheme is a loan from the government to help with your study costs.
Student loans are interest free for borrowers living in New Zealand for 184 or more consecutive days (about six months). If you do go overseas for more than 184 days you will be paying 6.6% interest.
There are 3 parts to a student loan plus a $50 administration fee for each loan account you use (from 1 January 2011 the administration fee is changing to a $60 establishement fee). You don't have to borrow for all three parts of the loan.
The more you borrow, the more you have to pay back.
Loan vs Allowance
What you borrow for living costs goes down by your student allowance.
Student allowance after tax + Student loan living costs = $163.38.
For example, if your student allowance is $100 a week after tax, then you can only borrow up to $63.38 a week for your living costs.