Mortgage Borrowing Capacity Australia 2026: How Much Can You Actually Borrow?

What Is Borrowing Capacity and Why Does It Matter?

Borrowing capacity — also called borrowing power — is the maximum home loan amount a lender will approve for you. It is not simply a multiple of your salary. Banks run a detailed serviceability assessment that weighs your income against your expenses, existing debts, and a mandatory stress-test interest rate set by regulators.

Get this number right before you start attending open homes. Walking into a purchase negotiation without knowing your realistic ceiling often leads to wasted time, failed finance clauses, or — worse — a loan you struggle to service.

The APRA Serviceability Buffer: The Rule That Changes Everything

The single biggest factor limiting Australian borrowing capacity in 2026 is APRA's mandatory 3% serviceability buffer. APRA, the Australian Prudential Regulation Authority, requires every regulated lender to assess your ability to repay a home loan not at the advertised interest rate, but at that rate plus 3 percentage points.

Here is what that means in practice right now. With the RBA cash rate sitting at 4.35% following three rate hikes in 2026 (February, March, and May), typical variable home loan rates are running at around 6.25–6.50% per annum. Add the APRA buffer and lenders are stress-testing your repayments at approximately 9.25–9.50% per annum — even though you will actually be paying the much lower advertised rate.

That is a significant difference. It means a borrower who could comfortably afford repayments at 6.3% still needs to demonstrate they can handle repayments at 9.3%. This stress-testing design is deliberate: APRA introduced the 3% buffer in October 2021 specifically to protect borrowers from rate rises, and the subsequent 13-rate-hike cycle between 2022 and 2023 proved the policy's value. As of June 2026, the buffer remains unchanged at 3 percentage points.

How Australian Lenders Calculate Your Maximum Loan

Lenders follow a broadly consistent methodology, though each bank has its own internal benchmarks for living expenses. Here is the core process.

Step 1: Determine Your Net Income

Banks start with your gross annual income — salary, rental income, investment dividends, and other regular income streams — and subtract estimated income tax to arrive at your after-tax (net) income. For the 2025-26 financial year, the ATO income tax brackets range from 0% on the first $18,200 up to 45% on income above $190,000, plus the 2% Medicare Levy on most incomes. You can calculate your exact take-home pay using CalcPhi's Salary Take-Home Pay Calculator.

Step 2: Subtract Monthly Living Expenses

Lenders deduct your monthly living costs from your net income. Most banks use the Household Expenditure Measure (HEM) as a benchmark — a scale based on your household size and income level. In 2026, HEM benchmarks for a couple in a capital city are typically in the range of $3,000–$4,500 per month. If your declared expenses are below the HEM, the bank will use the HEM figure regardless. If they are higher, they use the higher number.

Step 3: Subtract Existing Debt Repayments

Any existing monthly debt commitments — personal loans, car finance, credit card minimums, HECS-HELP repayments — are deducted from your available income. Credit cards are a common trap here: lenders assess a minimum repayment based on your total credit limit, not your current balance. A $20,000 credit card limit can reduce your borrowing power by roughly $50,000–$80,000 even if the card is fully paid off.

Step 4: Apply the Stress-Test Rate

Whatever is left after tax, living expenses, and existing debts is your "surplus income" — the amount the bank treats as available for a new mortgage repayment. The lender then calculates the maximum loan whose repayments at the stress-test rate (advertised rate + 3%) fit within that surplus.

Step 5: Apply the LVR Cap

Most standard loans are capped at an 80% loan-to-value ratio (LVR). This means the bank will lend you a maximum of 80% of the property's value; you need at least a 20% deposit to avoid Lenders Mortgage Insurance (LMI). LMI is a one-off premium that protects the lender (not you) if you default — it can add thousands to your loan cost and is typically capitalised into the loan amount.

A Worked Example: Sarah and Tom in Melbourne

Sarah earns $95,000 per year as a project manager. Tom earns $75,000 per year as a teacher. Together, their gross combined income is $170,000. After income tax and the Medicare Levy, their combined net income is approximately $129,000 per year, or about $10,750 per month.

Their monthly living expenses are estimated at $4,200 based on HEM for a couple in Melbourne. Tom has a HECS-HELP debt with a monthly repayment of around $350 at his income level. They have no other debts and have cancelled their old credit card.

Monthly surplus after expenses and HECS: $10,750 – $4,200 – $350 = $6,200 per month.

With a variable rate of 6.30% and the 3% buffer applied (stress-test rate of 9.30%), and a 30-year loan term, $6,200 per month in repayment capacity supports a maximum loan of approximately $745,000.

At an 80% LVR, the maximum property price Sarah and Tom could buy is around $930,000 — provided they have the $185,000 deposit plus stamp duty and other purchase costs. The CalcPhi Stamp Duty Calculator can show you exactly how much transfer duty you will pay by state, including any first home buyer concessions.

What Reduces Your Borrowing Capacity in 2026?

Several factors are actively cutting into borrowing power right now, and some are within your control.

Rising Interest Rates

The three RBA rate hikes of 2026 (totalling 75 basis points) have materially reduced what new borrowers can access. For a couple on $180,000 combined income, the cumulative effect of those hikes has trimmed approximately $50,000–$60,000 off maximum borrowing capacity compared to late 2025. This effect compounds: every 25-basis-point rise in the cash rate moves the stress-test rate up by the same amount, reducing the loan size the surplus income can service.

Credit Card Limits

Credit card limits — not balances — are counted as liabilities. Reducing or cancelling cards you do not need before applying for a home loan is one of the most effective ways to increase your borrowing capacity.

Buy Now Pay Later (BNPL) Commitments

In 2026, most major lenders now treat BNPL arrangements (Afterpay, Zip, Humm, etc.) as existing debt commitments in their serviceability assessments. Small monthly BNPL commitments can have a disproportionate effect on your assessed surplus income.

Number of Dependants

Each dependent child reduces your assessed surplus income because the bank increases its HEM estimate for your household. A single applicant earning $120,000 with no dependants will borrow materially more than the same applicant with two school-age children.

Borrowing Capacity by Income Level: 2026 Estimates

The table below gives a rough indication of maximum borrowing capacity for a single applicant with no dependants, no existing debts, and moderate living expenses, at a 6.30% variable rate with APRA's 3% buffer applied.

Estimated maximum borrowing capacity — single applicant, no debts, 2026

Gross Annual Income	Approx. Net Monthly Income	Surplus After Expenses	Estimated Max Loan
$80,000	~$5,350	~$2,100	~$255,000
$100,000	~$6,550	~$3,000	~$360,000
$120,000	~$7,700	~$4,000	~$485,000
$150,000	~$9,300	~$5,500	~$665,000
$200,000	~$11,700	~$7,400	~$895,000

These are estimates. Your actual figure will vary based on your specific expenses, debts, dependants, and the lender's internal benchmarks. Use CalcPhi's Borrowing Power Calculator to input your own numbers and get a personalised estimate.

How to Maximise Your Borrowing Capacity

There are several steps you can take in the months before applying for a home loan that genuinely move the dial.

The first is to clear or reduce credit card limits and BNPL accounts. The second is to reduce existing personal or car loan balances as much as possible. Third, if you have a HECS-HELP debt and are close to paying it off, doing so before applying can meaningfully improve your surplus income figure. Fourth, consider whether your declared income can be increased legitimately — some borrowers forget to include rental income, consistent overtime, or investment distributions. Finally, maintaining clean bank statements for at least three months before application helps underwriters verify your declared expenses against reality.

You can also reduce the size of the loan you need by saving a larger deposit — both because you borrow less and because a lower LVR often unlocks better interest rates from lenders.

What About Joint Applications?

Borrowing as a couple generally increases your borrowing power substantially — though not always by the simple sum of both individual capacities. The key dynamic is that combined net income rises significantly, while living expenses (the HEM) for a couple are not twice those of a single person. This means the surplus income available for mortgage repayments grows faster than expenses, improving the effective borrowing ratio.

If one partner has significantly more debt or a worse credit history, however, it may in some cases make sense to apply as a single borrower — a decision worth discussing with a mortgage broker.

Using a Mortgage Broker vs Going Direct

A mortgage broker has access to serviceability calculators from dozens of lenders and can identify which institutions apply the most favourable internal benchmarks for your situation. Some lenders use higher HEM estimates than others; some apply a lower notional repayment rate to credit card limits. A broker's role is to find the lender whose assessment methodology fits your financial profile — not just the one with the lowest advertised rate.

Going direct to a single bank means you only see one set of policies. If that bank's internal benchmarks are conservative relative to your situation, you may be offered less than you qualify for elsewhere.

Once you know your borrowing range, use CalcPhi's Mortgage Calculator to model repayments, total interest cost, and the impact of different loan terms at current rates. This gives you a clear picture of what your monthly cash flow will look like after settlement.

Frequently Asked Questions

• How much can I borrow on a $100,000 salary in Australia in 2026?

  A single applicant earning $100,000 with no dependants and moderate debts can typically borrow around $350,000–$400,000 under current APRA serviceability rules. The exact figure depends on your monthly expenses and any existing debt commitments. Use CalcPhi's Borrowing Power Calculator to get a precise estimate based on your own numbers.

• What is the APRA 3% serviceability buffer and can it be waived?

  APRA's 3% serviceability buffer requires lenders to assess your repayment ability at your actual interest rate plus 3 percentage points. It cannot be waived for new loans or most refinances. There is a limited exception for same-lender refinancing where the loan amount does not increase, but the buffer applies in virtually all other scenarios. As of June 2026, there is no regulatory change to this requirement.

• Do credit card limits really reduce how much I can borrow?

  Yes — and significantly. Lenders count your total credit card limit as a liability, not your current balance. A $15,000 credit card limit is typically assessed as approximately $450/month in minimum repayments, which can reduce your borrowing capacity by $50,000 or more. Reducing or cancelling unused cards before applying is one of the most effective ways to lift your borrowing power.

• Does HECS-HELP debt affect my home loan borrowing capacity?

  Yes. Lenders count your HECS-HELP repayment as an ongoing commitment when assessing your surplus income. The repayment rate scales with income — at $75,000 per year it is 3.5% of income, rising to 10% above $141,848. This reduces your monthly surplus available for mortgage repayments and lowers your maximum loan accordingly.

• What is the maximum LVR for a home loan in Australia?

  Most standard home loans are capped at 95% LVR, meaning you need a minimum 5% deposit. However, borrowing above 80% LVR triggers Lenders Mortgage Insurance (LMI), a premium that can be tens of thousands of dollars. The standard target is a 20% deposit to avoid LMI entirely. CalcPhi's LMI Calculator shows you the exact LMI cost at your deposit level.

• How much deposit do I need for a $700,000 home in Australia?

  To borrow at 80% LVR on a $700,000 property, you need a $140,000 deposit plus stamp duty and purchase costs. In Victoria, stamp duty on a $700,000 property for an owner-occupier is approximately $37,000. First home buyers may be eligible for concessions. Use the CalcPhi Stamp Duty Calculator to check your state's exact rates and any applicable exemptions.