How Much House Can I Actually Afford in Australia? (2026 Guide)
How Australian lenders calculate borrowing capacity — APRA's 3% buffer, the HEM benchmark, how debts reduce your limit, and a worked example for a $180K household income.
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Try Finance Calculator →- Lenders assess serviceability at your actual rate plus 3% (APRA buffer), not at the rate you'll actually pay
- The HEM benchmark prevents expense under-declaration — lenders use whichever is higher: your declared expenses or HEM
- Credit card limits reduce borrowing capacity regardless of whether you carry a balance
- HECS-HELP debt materially affects capacity — a $100K earner with student debt may borrow $70K–$80K less
- Capacity varies by up to 20% between major banks for identical borrower profiles — the figure from one lender is not definitive
- Stamp duty comes on top of borrowing capacity and is paid separately from the loan
The question "how much can I borrow?" is not the same as "how much should I borrow?" and Australian lenders apply a specific regulatory framework that determines the former with more precision than most borrowers realise.
Understanding how that calculation works — the mechanics behind the number your broker or banker gives you — changes how you prepare for a home loan application and how you interpret the answer.
This guide covers the serviceability framework Australian lenders use, with worked examples for a typical household income scenario. It does not tell you what to buy.
Disclaimer: This is general educational information about borrowing capacity and home loan assessment in Australia. It is not personal financial advice. For an assessment specific to your income, debts, and circumstances, consult a licensed mortgage broker or financial adviser.
How lenders define "what you can afford"
Lenders in Australia don't simply apply an income multiple. The assessment involves three components working in sequence:
- Gross income — what you earn, with adjustments for income type
- Committed expenditure — existing debt repayments, assessed at the higher of actual or HEM
- Net income surplus — what remains after committed expenditure must be enough to cover the proposed loan repayment at the assessment rate
The assessment rate is your actual interest rate plus APRA's minimum 3% serviceability buffer. On a loan at 6.5%, the assessment rate is 9.5%. Every dollar of repayment capacity is tested against that higher rate, not the rate you'll actually pay.
The APRA serviceability buffer explained
APRA (the Australian Prudential Regulation Authority) sets the rules for how banks and other ADIs (authorised deposit-taking institutions) must assess loan serviceability.
The current requirement: lenders must assess serviceability at a minimum of 3 percentage points above the product interest rate, with an absolute floor of 7% — whichever is higher. In practice, at current rates around 6–7%, the 3-percentage-point add-on is the binding constraint.
Why this matters for borrowing capacity:
On a 30-year loan of $700,000, the difference between a 6.5% repayment and a 9.5% repayment is significant:
| Rate | Monthly repayment | Annual | Difference |
|---|---|---|---|
| 6.5% (actual) | $4,423 | $53,076 | — |
| 9.5% (assessment) | $5,888 | $70,656 | +$17,580/year |
The lender must confirm you can sustain the $5,888/month figure, even though you'll only ever pay $4,423. For many households, this buffer is the binding constraint on borrowing capacity — not their income.
The buffer was explicitly tightened from 2.5% to 3% in late 2021 as APRA responded to rising household debt. It was reviewed but not reduced in 2023 and 2024.
The HEM benchmark: the floor on living expenses
HEM stands for Household Expenditure Measure. It was developed by the Melbourne Institute and represents median household spending on absolute necessities (food, utilities, minimum clothing) plus the 25th percentile on discretionary items (restaurant meals, recreation, etc.) for various household types.
Lenders use HEM as a floor in their serviceability models. If a borrower declares living expenses below the HEM for their household type and postcode, the lender substitutes HEM. If declared expenses are higher, the lender uses actual.
What HEM looks like in practice (approximate 2026 figures by household type in a major capital city):
| Household type | Approximate monthly HEM |
|---|---|
| Single, no dependants | $2,100–$2,400 |
| Couple, no dependants | $3,100–$3,500 |
| Couple, 1 child | $3,700–$4,200 |
| Couple, 2 children | $4,300–$4,900 |
| Single parent, 1 child | $2,800–$3,200 |
Figures are indicative — actual HEM varies by income level, postcode, and lender's version.
The practical implication: declaring $2,000/month in living expenses when you're a couple in Sydney with two children achieves nothing — the lender will apply ~$4,500/month anyway.
Income: what lenders count and how much
Not all income is treated equally in serviceability assessments.
| Income type | Typical lender treatment |
|---|---|
| Base salary / wages (PAYG) | 100% of gross |
| Permanent part-time | 100% of base |
| Overtime / shift allowances | 80% if consistent 2+ years |
| Bonuses / commissions | 50–80%, requires 2+ years evidence |
| Self-employment income | 2-year average of net profit, often 80–100% |
| Rental income | 75–80% of gross rent (vacancy allowance) |
| Government benefits (Family Tax Benefit) | 100% if ongoing |
| Investment / dividend income | Varies; 2-year average required by most lenders |
HECS-HELP and its effect on serviceability:
Compulsory HECS-HELP repayments are treated as income deductions by most lenders. The 2026 thresholds:
- 1% of income from $51,550
- Scales progressively to 10% on income above $137,897
A borrower earning $100,000 gross faces approximately $7,900/year in compulsory HECS repayments. Lenders deduct this from usable income before applying the serviceability test, reducing borrowing capacity by approximately $70,000–$80,000 on a 30-year loan.
How existing debts reduce borrowing capacity
The most commonly underestimated factor is the impact of existing debts — not their balances, but their monthly commitments.
Credit cards: Most lenders assess a monthly commitment equal to 3% of the total credit card limit, regardless of whether you carry a balance. A $15,000 limit across two cards is treated as $450/month in committed expenditure.
Car loans and personal loans: Actual monthly repayment amounts are included in full.
BNPL (Buy Now Pay Later) facilities: Most lenders now include outstanding BNPL balances in liability assessments. Treatment varies, but many treat minimum monthly payments similarly to credit cards.
Existing mortgages (for investors): Assessed at the higher of the actual repayment or the assessment rate repayment.
Quantifying the impact on borrowing capacity:
| Existing liability | Monthly commitment | Approximate reduction in borrowing capacity (30yr, 9.5% assessment) |
|---|---|---|
| $10,000 credit card limit | $300/month | ~$35,000 |
| $20,000 credit card limit | $600/month | ~$70,000 |
| $15,000 car loan ($350/mo remaining) | $350/month | ~$41,000 |
| HECS at $100K income (~$8K/yr) | ~$650/month | ~$76,000 |
| Combined (above three) | ~$1,600/month | ~$185,000 |
The last row is a realistic profile for a mid-income professional with student debt, a car loan, and credit cards who hasn't paid them down before applying. Their borrowing capacity is approximately $185,000 lower than an otherwise identical borrower without those liabilities.
Worked example: a $180,000 household income
Scenario: Two applicants, combined gross income $180,000 ($110,000 + $70,000). Both permanently employed. One applicant has $30,000 HECS remaining, monthly repayments of ~$500. Joint credit card limit of $15,000 (minimum commitment: $450/month). No other debts. Renting, no children.
Income available after HECS:
- Gross income: $180,000/year = $15,000/month
- HECS deduction (applicant 1, earning $110K): ~$550/month
- Effective income for serviceability: ~$14,450/month
Living expenses:
- HEM for couple, no children, major capital city: ~$3,300/month
- Declared expenses: $3,800/month
- Lender uses: $3,800/month (declared > HEM)
Existing monthly commitments:
- Credit card minimum (3% × $15,000): $450/month
Net surplus available for new loan repayment: $14,450 − $3,800 − $450 = $10,200/month
Borrowing capacity at 9.5% assessment rate (30-year loan): Monthly repayment of $10,200 at 9.5% for 30 years → loan principal ≈ $1,175,000
Using a standard home loan calculator: a $10,200/month repayment at 9.5% over 360 months equals a principal of approximately $1,175,000. You can work through this yourself using the home loan calculator.
At the actual 6.5% rate, what does $1,175,000 cost monthly? EMI at 6.5% over 30 years: approximately $7,428/month — which is what they'd actually pay, not the $10,200 test figure.
This gap — between the serviceability test repayment and the actual repayment — is the buffer APRA requires. It's approximately $2,700/month of headroom for this household.
What stamp duty adds — and why it's separate
Borrowing capacity covers the loan amount. Stamp duty is a separate upfront cost paid directly to the state government, funded from savings (not the loan).
For this household targeting a $1.1M purchase:
| State | Approximate stamp duty | First home buyer concession |
|---|---|---|
| NSW | ~$43,500 | Partial concession to $1M; full exemption ≤ $800K |
| Victoria | ~$59,000 | Concession ≤ $600K; waiver for FHBs ≤ $600K |
| Queensland | ~$30,500 | Exemption ≤ $550K purchase price |
| SA | ~$50,000 | No concession at this price point |
| WA | ~$44,000 | Exemption ≤ $430K; scales above |
For a $1.1M purchase in NSW, stamp duty of ~$43,500 comes from savings, not the loan. A household targeting maximum borrowing capacity needs to have this amount plus a deposit in cash — typically a total of $150,000–$200,000 out of pocket for this price range depending on LVR.
Deposit size: the 20% line and what it means
The 20% deposit threshold (or LVR of 80%) is significant because it eliminates the requirement for Lenders Mortgage Insurance (LMI).
LMI protects the lender (not you) if you default and the property sale doesn't cover the outstanding loan. The premium is paid by you.
For a $1.1M purchase at various LVRs:
| Deposit | LVR | LMI required | Approximate LMI premium |
|---|---|---|---|
| $220,000 (20%) | 80% | No | $0 |
| $165,000 (15%) | 85% | Yes | ~$11,000–$16,000 |
| $110,000 (10%) | 90% | Yes | ~$22,000–$30,000 |
| $55,000 (5%) | 95% | Yes | ~$35,000–$45,000 |
LMI can be capitalised into the loan (added to the principal), which is convenient but means you're paying interest on the premium for the life of the loan. A $25,000 LMI premium capitalised into a 6.5% loan over 30 years costs approximately $57,000 in total including interest.
The First Home Guarantee allows eligible buyers to purchase with 5% down without LMI, with the Commonwealth Government guaranteeing the gap to 20%. 35,000 places are available per year; eligibility criteria and property price caps apply.
The difference between capacity and affordability
Borrowing capacity is a ceiling set by lenders. Affordability is the amount that makes sense given your other financial goals, risk tolerance, and life plans.
Lenders test your ability to service a loan at 9.5% because rates can move. But they don't ask whether you plan to have children, whether your career has income risk, whether you want to travel, or whether you're also saving for something else.
The distinction between maximum borrowing capacity and comfortable borrowing capacity matters. A household with $10,200/month in tested serviceability could technically borrow $1,175,000. If their actual rate is 6.5% and repayments are $7,428/month, that leaves ~$2,772/month after mortgage for everything else. Whether that is comfortable depends on their specific situation.
For the mechanics of how repayments change as rates move, home loan repayments in Australia: what calculators don't show you walks through the rate-rise arithmetic in detail.
What reduces capacity — and what can be done
High-limit credit cards: Closing unused cards removes the 3%-of-limit commitment from the assessment. A $20,000 unused card adding $600/month to committed expenditure costs approximately $70,000 in borrowing capacity. Closing it 60–90 days before application (so it appears on a credit report) removes that liability.
HECS-HELP: Can't be changed, but lenders see it accurately from tax returns. Repaying HECS early has complex trade-offs — it reduces committed expenditure for serviceability purposes, but HECS is indexed to CPI (not a commercial interest rate), so the financial calculus depends on the remaining balance and rate environment.
Multiple credit products: Each BNPL limit, personal loan, and car loan reduces capacity. Consolidating or paying these down before applying improves the serviceability position.
Income documentation: Lenders require recent payslips and often 2 years of tax returns for non-base income components. Having documentation ready — particularly for overtime, bonuses, or self-employment — prevents income from being discounted.
What to do next
Once you have a sense of your approximate borrowing capacity from first-principles, there are three practical next steps:
Run the numbers yourself. The home loan calculator lets you input different loan amounts and rates to see actual repayment figures. Work backwards from what's comfortable as a monthly repayment to find the loan amount.
Get a pre-approval. This is a conditional assessment by a specific lender at a specific point in time. It's not a guarantee, but it gives a realistic ceiling from a lender who has seen your actual documentation.
Compare lenders. Capacity estimates from different lenders for the same borrower profile can differ by 10–20%. For the mechanics of how assessment rates, income shading, and HEM versions vary, understanding the EMI calculation framework behind all these figures helps when reading lender assessments.
- APRA's 3% buffer means your loan is tested at up to 9.5% even if you'll pay 6.5% — this is the binding constraint for most borrowers
- HEM is the floor for living expenses — declaring lower expenses doesn't help if they're below the benchmark for your household type
- Credit card limits cost approximately $35,000 in capacity per $10,000 of limit, regardless of whether you use the card
- A $100,000 earner with HECS may borrow $70K–$80K less than an identical income earner without it
- Stamp duty is separate from borrowing capacity and must come from savings — budget $30K–$60K for a typical capital-city purchase at mid-range prices
- The maximum borrowing capacity and the comfortable borrowing capacity are different numbers — the calculator gives you the former, not the latter
About the author
Khushboo Patel holds a Master of Finance from the University of Adelaide. She writes about Australian mortgage analysis, loan structures, and personal finance methodology for MyEasyTools.