Consider a hypothetical example: a 26-year-old marketing manager from Melbourne graduated four years ago with a $38,000 HECS-HELP debt. He has been working full-time ever since, earning decent money. But when he logs into myGov to check his balance, it is sitting at $37,500.
Four years of work, and the debt has dropped by a measly $500.
"How is this even possible? Am I going to be paying this off until I'm 50?"
Our hypothetical graduate fell victim to the great Australian HECS trap: Indexation. During high-inflation years, the indexation added to his loan outpaced the mandatory repayments deducted from his pay. He was swimming against the current.
If you have a HECS debt, you need to understand the math. It is no longer "free money" that you can just ignore.
How HECS-HELP Repayments Work Now
You do not pay an interest rate on HECS-HELP loans. Instead, the balance is adjusted annually on June 1st based on inflation (indexation). If inflation is 4%, a $40,000 debt instantly becomes $41,600.
You only start making mandatory repayments once your repayment income crosses a threshold — and since 1 July 2025 the system is marginal: you pay a rate only on the dollars above the threshold, not a percentage of your entire income.
- Below about $67,000 of repayment income: $0
- $67,000 to $125,000: 15 cents per dollar over $67,000
- Above $125,000: further marginal bands apply
Why the Balance Barely Moved
Let's look at the math. In the first few years out of uni, our hypothetical graduate was earning around $60,000 — below the repayment threshold. That means his mandatory repayment was $0 for the year.
But during those years, inflation was high. An indexation rate of 4% on his $38,000 debt added $1,520 to his balance. He repaid nothing, but the debt grew by $1,520. He went backwards by over $1,500 in a single year, despite working full-time.
Should You Make Voluntary Payments?
The old golden rule of Australian finance used to be: "Never pay off your HECS early. It's the cheapest debt you will ever have. Invest the money instead."
That advice is now more nuanced. It depends on two things:
1. Are you buying a house soon?
Banks deduct your compulsory HECS repayments from your borrowing power. At $90,000 of repayment income, the compulsory repayment is about $3,450 a year — which reduces assessed mortgage borrowing capacity. If you are trying to buy a house, clearing a small HECS debt (under $10k) is one of the fastest ways to get approved for a larger mortgage.
2. Can you beat the indexation rate?
If indexation is 3.5%, and you can put your spare cash in a high-interest savings account earning 5.0% (which is about 3.5% after taxes), you are basically breaking even. If you invest in index funds returning 8%, you are mathematically better off investing the money than paying off HECS. But for many, the psychological weight of a $40,000 debt makes voluntary payments worth it.
About This Guide
This guide was prepared by the LoanPoint Editorial Team for educational purposes. HELP repayment thresholds and indexation reflect published ATO rules as of September 2026; check the ATO for the current year's figures.