How HELP/HECS debt reduces your home loan borrowing power in 2026

If you have a HELP or HECS debt, you already know it reduces your take-home pay. What many borrowers don't realise is how heavily lenders penalise that debt when calculating how much you can borrow.

In 2026, with the official cash rate at 4.35% and the typical lowest variable rate around 5.69%, every dollar of committed repayment matters. Add APRA’s mandatory 3% serviceability buffer, and the monthly cost of your student loan becomes a significant drag on your borrowing capacity.

This article explains exactly how Australian lenders treat HELP/HECS debt, provides real 2026 borrowing-power calculations, and shows you what you can do to maximise your loan.

How lenders view HELP/HECS debt

Lenders treat your HELP or HECS repayment as an ongoing financial commitment, just like a car loan or credit card limit. They do not care that the debt is interest-free, indexed only to CPI, or that the government deducts repayments automatically through the tax system.

What matters to the bank is that a portion of your gross income is already allocated elsewhere. That allocation reduces the disposable income available to service a mortgage.

The Australian Prudential Regulation Authority (APRA) requires all lenders to apply a 3% buffer above the current interest rate when assessing serviceability. With a variable rate of 5.69%, that means you are tested at 8.69%. If your HELP repayment is $300 per month, that $300 is competing against a mortgage payment calculated at 8.69% – a very expensive liability from the lender’s perspective.

The 2026 repayment rates and how lenders estimate them

For the 2026-27 financial year, compulsory HELP repayment rates are tiered based on your income. The repayment percentage ranges from 1% of your repayment income (above $52,000) to 10% (above $151,000).

Lenders typically use one of two methods to estimate your monthly HELP obligation:

• Actual repayment method: They ask for your most recent notice of assessment and use the compulsory repayment shown there, divided by 12.
• Estimating method: They apply a percentage of your outstanding debt, often 1% to 2% per month if the actual repayment is not yet available.

In practice, most lenders prefer the actual method because it reflects your real obligation. However, if you are still studying or your income has changed, the estimating method can produce a higher liability, which reduces borrowing power further.

Real example: $50,000 HELP debt on a $90,000 salary

Let’s run the numbers for a typical single borrower in mid-2026.

• Gross salary: $90,000
• Outstanding HELP debt: $50,000
• Compulsory repayment (2026-27 rate): 3.0% of repayment income = $2,700 per year, or $225 per month

Now factor in the mortgage assessment. At a test rate of 8.69% (5.69% + 3% buffer), a monthly repayment of $225 on a $500,000 loan is roughly $225 ÷ ($500,000 ÷ 12 × 0.0869) = only about $225 ÷ $3,620 = negligible? That calculation is rough. Let’s be more precise.

A better approach: using standard serviceability calculators, lenders see $225 as a monthly commitment. On an income of $90,000 net of tax, that $225 reduces the maximum monthly mortgage payment you can afford. Typically, each $100 of non-housing commitments can reduce borrowing capacity by $15,000 to $20,000.

Therefore, a $225 HELP repayment can reduce your maximum loan by approximately $35,000 to $45,000.

That is significant. If you were hoping to borrow $600,000, you might only qualify for $560,000 after accounting for HELP.

Impact of the 6x DTI cap from February 2026

From February 2026, APRA introduced a debt-to-income (DTI) cap of 6 times income for new loans. This cap is applied in addition to the serviceability test.

Your DTI is calculated as the total loan amount divided by your gross income. For the borrower above with $90,000 income and $50,000 HELP debt, the HELP debt itself does not directly increase the DTI ratio – DTI only includes the mortgage. But if the HELP repayment reduces your maximum loan, your actual loan may be lower than the DTI cap would allow.

However, if the HELP repayment reduces your loan from $600,000 to $560,000, that is still a DTI of 6.2x – above the 6.0x cap. So the borrower might be further restricted. The combined effect of serviceability and DTI can be more punishing than either alone.

First Home Buyer Guarantee changes can offset HELP impact

The First Home Buyer Guarantee (FHBG) underwent changes from July 2026. Key updates include:

· No income cap – previously there was a $125,000 cap for singles and $200,000 for couples. Now any income level qualifies. · Minimum deposit remains 5% – no LMI required. · Price caps increased: · Sydney: $1.5 million · Brisbane: $1 million · Melbourne: $950,000 · Perth: $850,000

For a first home buyer with HELP debt, the FHBG allows you to borrow with only a 5% deposit, which reduces the total loan amount and may bring it under the DTI cap. However, the HELP repayment still reduces serviceability. So you may still be limited to a lower-priced property.

For example, a couple earning $150,000 combined with $60,000 in HELP debt could still use the FHBG to buy in Melbourne up to $950,000, but their borrowing power might only reach $800,000 due to the HELP liability. They would need to either increase their deposit or choose a cheaper suburb.

Strategies to minimise the effect of HELP on your borrowing power

You cannot simply ignore your HELP debt, but you have options.

1. Pay down part of the debt before applying

Voluntary repayments reduce the outstanding balance. Loan holders who pay $5,000 to $10,000 extra can lower their compulsory repayment percentage (the repayment rate is based on income, not the balance? Actually, the percentage is based on income, but the dollar amount is capped at the outstanding debt. If your balance is small, your repayment may be less than the mandated percentage. More importantly, lenders see a smaller liability because the actual compulsory amount decreases when the balance is below the repayment threshold.

Example: If you owe $2,000 and your income requires a 4% repayment ($3,600), you only pay $2,000. That can be much lower than if you owed $50,000.

2. Delay your home purchase until a pay rise

Higher income means a larger help repayment, which is a double-edged sword. But the increase in borrowing power from extra income typically outweighs the extra HELP cost. If you expect a promotion from $90,000 to $110,000, your HELP repayment rises from $225/month to about $400/month, but your net borrowing capacity increases by roughly $50,000 to $60,000. So overall, it is still beneficial to earn more.

3. Use a lender that applies a lower HELP estimate

Not all lenders use the same method. Some aggregators allow borrowers to provide evidence of actual repayment, avoiding the higher estimate. For example, a lender that estimates 1.5% of outstanding debt monthly would calculate $750/month for a $50,000 debt, whereas the actual repayment may be only $225/month. Choosing a lender that accepts the actual figure can preserve thousands of dollars of borrowing capacity.

4. Apply as a dual-income couple

Combining incomes reduces the proportional impact of HELP debt. If one partner has no HELP debt, the couple’s total serviceability is less affected. Even if both have debts, two incomes can absorb the liability more easily than a single income.

How to calculate your own HELP-affected borrowing power

Rather than guess, use a serviceability calculator that includes HELP as a separate liability.

The HomeLoanAI Borrowing Power Calculator lets you input your HELP debt balance and repayment amount, and shows your maximum loan under current APRA rules including the 3% buffer and 6x DTI cap.

Open the borrowing power calculator → data-open-widget="borrowing-power-calculator"

If you prefer, you can also discuss your situation with a mortgage broker who can compare lender policies on HELP debt. Some lenders are more accommodating than others.

Frequently Asked Questions

Q1: How much does a $50,000 HELP debt reduce my borrowing power on a $100,000 salary?

A borrower earning $100,000 in 2026-27 has a compulsory HELP repayment of about $3,000 per year ($250/month). Using a lender test rate of 8.69%, this reduces borrowing capacity by roughly $35,000 to $40,000. The exact figure depends on other debts, living expenses, and the lender’s assessment method.

Q2: Does HELP debt count towards the 6x DTI cap?

No, the DTI cap only includes the mortgage amount divided by gross income. Your HELP debt is not counted in the numerator. However, if the HELP repayment reduces your maximum loan, your effective DTI may be lower than the cap anyway. The cap is a separate constraint that could further limit you if your income is low relative to the loan.

Q3: Can I use the First Home Buyer Guarantee if I have a HELP debt?

Yes, the FHBG has no income cap from July 2026, and no restriction based on existing HELP debt. However, your ability to service the loan will still be assessed with the HELP repayment. If the HELP liability reduces your borrowing power below the price cap for your city, you may need a bigger deposit or a cheaper property.

Q4: Should I make voluntary HELP repayments to increase borrowing power?

It depends on your marginal tax rate and the indexation rate on HELP. In 2026, HELP indexation is roughly 3.2% (based on CPI). If you have high-interest debts or car loans, pay those first. But if your HELP debt is large and you are close to the borrowing limit you need, a voluntary payment of $5,000–$10,000 can reduce your assessment liability and increase borrowing capacity enough to qualify for your target property.

Q5: How do lenders calculate HELP repayments for two-income couples?

Lenders look at each borrower’s individual HELP debt and repayment. They total the repayments and deduct from combined net income. For a couple earning $160,000 combined with $80,000 in HELP debts, total annual repayments might be $8,000 ($667/month). This reduces borrowing capacity by roughly $90,000 to $100,000.

Sources

• APRA – Macroprudential Policy: DTI Cap, Serviceability Buffer (February 2026)
• Reserve Bank of Australia – Cash Rate Target, June 2026
• Housing Australia – First Home Buyer Guarantee: Price Caps July 2026
• Australian Taxation Office – HELP Repayment Rates 2026-27
• State Revenue Offices (NSW, QLD, VIC, WA) – FHBG Price Caps

Related reading

• How much can I borrow in 2026?
• Understanding the APRA serviceability buffer in 2026
• Your borrowing power dropped in 2026. Here’s what you can do

Ready to check your own borrowing power? Use the HomeLoanAI calculator to see exactly how your HELP debt affects your maximum loan under current 2026 rules.

[Open the borrowing power calculator → data-open-widget="borrowing-power-calculator"]