A student must repay the loan through the tax system when the individual’s income is above the minimum repayment threshold. Repayment thresholds are adjusted each year to reflect changes in average weekly earnings. The minimum repayment income threshold for 2018-19 is $51,957.
A VET Student Loan is a personal debt obligation that can affect a student’s credit rating and has wage and tax repayment implications.
For further information please refer to the ATO site here