HECS Debt Borrowing Capacity: Deposit or Debt Repayment?

HECS debt borrowing capacity is best assessed with two applications on paper before moving any money. One keeps your study debt and deposit intact; the other reduces or clears the debt but leaves less cash for the purchase. A lender may prefer one outcome for serviceability while the smaller deposit creates another constraint.

Quick answer

HECS debt can affect a home-loan assessment through compulsory repayments and the lender’s policies. Paying it off may improve assessed cash flow, but also reduces money available for a deposit and other costs. Ask a lender or licensed mortgage broker to compare both scenarios before making an irreversible voluntary repayment.

HECS debt borrowing capacity: separate cash flow from deposit

HECS-HELP is part of the broader HELP system. In a mortgage assessment, the outstanding balance and the repayment obligation are related but different pieces of information. A lender wants to understand both your commitments and whether the proposed mortgage remains affordable under its assessment policy.

Your deposit answers another question: how much of the purchase can you fund without borrowing? Using cash to repay study debt may improve one part of the assessment while increasing the home loan needed, reducing the purchase budget or changing the loan-to-value ratio.

Do not assume an online borrowing calculator captures the lender’s current HELP policy. Treat it as an initial estimate and ask a lender or licensed mortgage broker to assess the specific scenarios. Approval also depends on the rest of the application, not one debt field.

What APRA changed, and what it did not

APRA’s June 2025 response distinguishes HELP treatment in debt-to-income reporting from treatment of repayments in serviceability. Its reporting definition excludes HELP debt because repayments are income-contingent. That reporting change does not mean lenders must ignore every borrower’s compulsory repayments when assessing affordability.

The guidance also allows lenders flexibility where HELP debt is expected to be repaid in the near term, using within 12 months as an example. APRA explains that this is discretionary and subject to prudent assessment, not an automatic approval rule. Ask the lender how it applies the guidance to your balance and expected repayments.

These are regulatory settings for relevant lenders, not a promise of a universal increase in borrowing power. Avoid relying on a headline claiming every borrower gains a fixed dollar amount. The result depends on income, debt, other commitments and the lender’s policy.

Use the current repayment-income rules

The ATO’s repayment-threshold guidance is the reference for the applicable income year. Repayment income is not always the same as base salary or taxable income alone; specified additions can matter. Use the correct year and your circumstances when estimating the obligation.

This guide does not reproduce a threshold table because the mortgage decision should use the current official calculation and lender assessment, not an old number copied into a long-lived article. Ask the lender which repayment figure it has used and how it was derived.

If your income changes through overtime, a bonus, salary packaging or another source, mention that in the assessment. Do not assume the amount withheld on one payslip is the final annual liability or the exact amount every lender will use.

Why a partial voluntary payment may not help as expected

A smaller outstanding HELP balance does not necessarily produce a proportionately smaller compulsory repayment. The obligation is driven by repayment income and the applicable rules, with the remaining balance relevant as the debt approaches repayment. Paying off one-quarter of the balance does not automatically cut the annual repayment by one-quarter.

Before making a partial payment, ask the lender to show its assessed repayment before and after. If the figure barely changes, you may have reduced the deposit without obtaining the serviceability improvement you expected. That does not mean the repayment has no value, but it changes the mortgage trade-off.

Also confirm the current loan balance directly through the authorised ATO account process. Indexation, credits and assessed repayments can affect the figure. Do not rely solely on an old statement or assume payroll withholding has already been applied to the loan account in the way you expect.

A deposit example with no approval promise

Suppose a buyer has an invented $120,000 in savings and $25,000 of HELP debt. They are considering a $600,000 property, before purchase costs. Keeping the cash would provide a nominal 20% deposit; paying off the debt first leaves $95,000, or about 15.8% of that price before costs.

The repayment might improve the lender’s cash-flow assessment, but the smaller deposit could increase the required mortgage and affect pricing or LMI. Neither outcome can be determined from those two figures alone. Purchase costs and an emergency reserve would reduce the cash available further.

This is why “pay the debt to borrow more” is incomplete advice. Ask for the maximum suitable purchase budget and required cash under both scenarios, not just a standalone maximum loan amount. Borrowing more is not itself the objective if the resulting purchase is less affordable.

Ask for these three scenarios

If a partial voluntary repayment is being considered, add it as a fourth scenario. Use the same property assumptions and other commitments in each. Otherwise a different purchase price or loan term can hide the effect you are trying to isolate.

Ask the lender to identify the binding constraint: deposit, serviceability, property security or another policy issue. If the deposit is the main problem, paying down HELP may move you further from the purchase. If serviceability is the main problem and the deposit remains sufficient, the assessment could point the other way.

Near-term repayment needs evidence

If the balance is likely to be cleared soon through ordinary compulsory repayments, ask whether the lender considers that under its policy. Provide current statements and income evidence through secure channels. The lender may need to assess the expected timeframe rather than accept a verbal estimate.

Do not plan around the 12-month example as though it guarantees an exception. APRA’s guidance leaves room for lender judgement and prudent limits. Another lender may interpret your circumstances differently, but repeated applications should not replace a careful initial policy enquiry.

Ask a licensed broker or lender to explain which information could change the assessment and whether a preliminary estimate is conditional. A pre-approval is not the same as an unconditional approval for a particular property or a guarantee that policy will remain unchanged.

Keep purchase costs and a cash buffer visible

The deposit is not the only cash requirement. Allow for applicable transfer duty or concessions, conveyancing, inspections, lender charges, moving and other purchase costs. Obtain figures relevant to your state and eligibility rather than applying a generic national amount.

Keep an emergency reserve appropriate to your circumstances. Clearing study debt may feel satisfying, but leaving no cash for an unexpected repair or income interruption can create pressure immediately after purchase. The mortgage assessment and your own comfort with the budget are separate checks.

If a proposed loan includes an offset or redraw feature, understand how access works before treating it as a substitute for cash. Our offset versus redraw guide explains the distinction. A facility’s availability remains subject to its terms.

Compare the mortgage terms too

Once the deposit-and-debt scenarios are assessed, compare the available mortgage rates, fees and features. A change in LVR can affect the offers available, so do not assume both scenarios qualify for the same advertised rate. Request written product terms for each realistic option.

Our comparison rate versus interest rate guide explains how to screen those offers. If you already own a property and are refinancing, include the switching costs rather than looking only at a possible increase in assessed borrowing capacity.

Avoid consolidating unrelated debt into a longer mortgage term without understanding the total-interest effect. A lower monthly payment can come from spreading repayment over more years. The fact that a lender can approve a structure does not establish that it is the best financial choice for you.

Questions to ask before making a voluntary repayment

Ask the lender what repayment obligation it currently uses, what it would use after the proposed payment and whether the debt qualifies for any near-term treatment. Ask how the smaller deposit affects the required loan, LVR, LMI and purchase budget.

Then ask what evidence is required after the payment and how long the account update may take to be reflected in the application. Do not transfer money based on an unconfirmed assumption that an approval will follow immediately. A voluntary debt repayment is not simply reversible if the property purchase falls through.

For tax and study-loan questions, use the ATO and an appropriately qualified adviser. For the credit decision, use a licensed lender or mortgage broker. This guide helps organise the comparison; it cannot determine your maximum loan or recommend that you use savings to clear HELP.

Sources and review

The CompareUs Editorial Team checked APRA’s HELP guidance, ATO repayment guidance and Moneysmart’s loan-selection information on 27 September 2026. The deposit example is hypothetical and excludes transaction costs to isolate the trade-off. No borrowing-capacity increase, approval outcome or personalised financial recommendation is promised.