How this is worked out
- 2026–27 compulsory repayments use the marginal system: nothing up to $69,528, 15c for each dollar above that up to $129,717, then $9,028 plus 17c per dollar up to $186,050, and 10% of all repayment income above that.
- Indexation was 2.8% on 1 June 2026. Future rates are unknown, so change the figure to test other scenarios. Repayment thresholds are assumed to rise by the same rate.
- Each year, that year's repayment comes off first and indexation is then added to what's left. In reality repayments are credited when your tax return is assessed, so timing can shift results slightly.
- Your employer withholds an amount from each pay towards this, and the ATO settles the exact repayment when you lodge your return.
Related: Take-home pay calculatorHow HECS-HELP repayments work