Quick Answer
For most doctors, paying HECS off early is not the win it feels like. Indexation now tracks CPI or WPI, currently sitting around 4%. Repayments come out of your pre-tax pay automatically, and the cash almost always works harder somewhere else. The main exception is when you are about to apply for a loan and need a stronger serviceability position.
How HECS Actually Works on a Doctor''s Income
Once your repayment income clears the threshold (around $54,435 for the 2025/26 year), the ATO takes a percentage straight out of your tax through your employer''s PAYG. By the time you are a registrar on $130k, you are paying close to 8.5% of your repayment income each year. As a consultant on $300k, it is the top 10% bracket.
That is the part a lot of doctors miss. The deduction is automatic, comes out of your pre-tax pay, and you do not really notice it. You are not writing a cheque each year or making a discretionary call. The "debt" feels louder than it actually is.
The cost on HECS is not interest. It is indexation, now capped at the lower of CPI or WPI under the 2023 reforms. For the June 2025 indexation, that worked out to about 4%. Compared to mortgage rates sitting above 6% or long-term sharemarket returns of around 8%, that is a low cost of capital.
The Argument Against Paying It Off Early
This is where most doctors are surprised. Say you are a registrar with $80,000 of HECS and $80,000 sitting in your offset account. Wiping the HECS feels clean and decisive. But you have just pulled $80,000 out of a 6% offset to clear a 4% indexed debt.
That is a 2% drag on your money. Over five years on $80k, you have handed roughly $8,000 in extra interest to the bank, instead of using that offset balance to reduce your mortgage cost. The same logic applies if the cash is sitting in shares or an ETF compounding at 7% or 8%.
The other thing worth remembering: HECS goes away if you stop earning. It does not follow you the way a mortgage does. If you take parental leave, drop to 0.6 FTE, or take a sabbatical, repayments pause automatically. No other debt behaves that politely.
There is also the inflation angle. Because indexation only adjusts the balance for cost of living, the real value of the debt shrinks slowly over time. A $60,000 balance in 2026 dollars is worth meaningfully less by 2036. Mortgages and personal loans do not come with that built in.
When Paying It Down Actually Makes Sense
There is one scenario where smashing HECS is genuinely the right call: borrowing capacity. Banks treat HECS repayments as ongoing commitments when they assess serviceability. For a consultant on $300k with a $60k HECS balance, that is roughly $30k a year coming off your assessed income on the loan application.
If you are a few months away from a property purchase and that balance is the difference between getting the house you want and missing out, paying it down can be the smartest move of the year. Speak to a broker before you act. Sometimes a partial paydown is enough to tip serviceability across the line without spending all your cash.
The other case is mental. If you genuinely have no other debt, no plans to borrow, no investments returning more than 4% after tax, and the HECS balance is nagging at you, paying it off is fine. Money is partly emotional. Just be honest with yourself that it is a peace-of-mind move rather than the optimal financial one.
How HECS Interacts With Your Other Decisions
A few practical knock-on effects worth knowing about. HECS is calculated on your "repayment income," which includes reportable fringe benefits and salary packaged amounts. So if you are salary packaging at a public hospital, your HECS repayment can go up even though your taxable income drops.
This catches registrars off guard every tax season. You salary package the full $9,010 for meals and entertainment, expecting a clean tax win, then discover your HECS repayment ticked up by a few hundred dollars. Still worth doing, but worth knowing in advance so the result does not feel like a surprise.
If you are contracting or running income through a service entity, HECS is calculated on the income that flows to you personally, not on what stays in the entity. That is one more reason for getting your structure right before income starts moving through it.
Key Takeaways
- HECS indexation now tracks CPI or WPI, currently around 4%, so the real cost is lower than most doctors assume.
- Pulling money from a 6% offset to clear a 4% debt costs you money, not the other way round.
- Repayments stop automatically if you stop earning, which is a feature no other debt has.
- The main exception is borrowing capacity. If you are about to apply for a loan, a targeted HECS paydown can be the right move.
- Salary packaging at a public hospital can increase your HECS repayment because of how repayment income is calculated.
Need a hand working out the numbers?
HECS sits in the middle of every doctor''s financial picture, but the right answer shifts depending on what else you have going on. Borrowing plans, structure, super contributions, and investment goals all pull on the same dollars.
That is the kind of conversation Voyage Financial has with doctors every day. If you want to know whether paying HECS down makes sense for your situation, or what to prioritise instead, book a chat with the team.
