“How much can I borrow for a home loan?” is often the first question buyers ask—and one of the easiest to answer too quickly. An online estimate can be useful, but your real borrowing capacity depends on how a lender views your income, expenses, debts, deposit and ability to manage repayments if rates rise.
The more useful goal is not simply to find the largest number available. It is to understand a realistic borrowing range, what may change that range and what repayment level still leaves room for everyday life.
What does borrowing capacity really mean?
Borrowing capacity is the amount a lender may be prepared to lend based on its credit policy and serviceability assessment. It is not the same as your purchase price. Your available deposit, buying costs and any lender’s mortgage insurance can also affect the price range you can consider.
Different lenders use different assumptions and assessment methods. The same household can therefore receive different borrowing outcomes from different lenders—even when the information supplied is identical. That is why a borrowing figure should usually be treated as a range until your full position has been assessed.
The main factors lenders assess
1. Your income and how it is earned
Lenders look at the amount, regularity and source of your income. A permanent salary may be assessed differently from overtime, bonuses, commissions, casual income, contracting income, rent or self-employed earnings. They may also require a particular history or supporting documents before accepting some income in full.
2. Your living expenses
Your declared household spending is considered alongside the lender’s own minimum expense benchmarks. Typical categories include food, utilities, transport, insurance, education, childcare, medical costs, subscriptions and recreation. A realistic expense picture matters: understating expenses can create problems later and does not help you choose a comfortable loan.
3. Existing debts and credit limits
Car loans, personal loans, HELP debt, buy-now-pay-later accounts, existing mortgages and credit cards can all affect capacity. Importantly, a lender may assess a credit card using its limit rather than the amount currently owing. Reducing or closing an unused limit may help in some situations, but it should be considered in the context of your wider position.
4. Dependants and household circumstances
The number of applicants, dependants and ongoing commitments can influence assessed expenses. Planned changes—such as parental leave, a move from full-time to part-time work or a new investment commitment—also deserve consideration even if they are not yet reflected in a calculator.
5. Your deposit and loan-to-value ratio
A larger deposit can reduce the amount you need to borrow and may widen the lender options available. A smaller deposit can still be possible, but lender’s mortgage insurance, government guarantee eligibility or other policy requirements may apply. Moneysmart suggests allowing for purchase costs as well as the deposit and explains why a 20% deposit is a useful benchmark in many cases. See its guidance on saving for a house deposit.
6. The lender’s serviceability rate
Lenders do not generally test affordability using only the interest rate you may pay on day one. APRA-regulated banks must apply a mortgage serviceability buffer of at least three percentage points, unless APRA determines otherwise. This helps test whether repayments could remain manageable at a higher rate. Lenders can also apply their own policy settings, floors and buffers.
Why your maximum approval may not be your comfortable budget
A lender’s maximum is a credit-policy outcome. Your comfortable budget is a life decision. It should account for the things you want to keep doing after settlement: building savings, taking holidays, paying school costs, maintaining the property and handling unexpected expenses.
Before choosing a target, test the repayment at several interest rates and compare monthly and fortnightly amounts. Falcon’s home-loan repayment calculators can help you model different loan sizes, terms and rates. Moneysmart also recommends checking how your budget could cope if interest rates rose by 2%.
What can reduce borrowing capacity?
- High credit-card limits, even when the cards are paid off
- Personal loans, car finance or buy-now-pay-later commitments
- Variable or recently commenced income
- Higher verified household expenses
- Dependants or other ongoing financial commitments
- A short remaining loan term or an older applicant’s retirement timeframe
- Credit-report issues or frequent recent applications
None of these automatically prevents an approval. Their effect depends on the full application and the lender’s policy.
How to prepare before you apply
- Review your actual spending. Use recent bank statements to build an honest monthly picture.
- List every debt and available limit. Include credit cards and buy-now-pay-later facilities, not just balances.
- Gather income evidence. Payslips, tax returns, financial statements or rental evidence may be required depending on how you earn.
- Separate your deposit from buying costs. Allow for stamp duty, conveyancing, inspections and other costs relevant to your purchase.
- Check your credit report. Correcting an error before applying can prevent avoidable delays.
- Model more than one scenario. Compare a conservative loan amount with a higher option and assess the difference in repayments and flexibility.
If you are purchasing your first property, our first-home buyer guidance explains the broader pathway from borrowing position to next steps.
Can a mortgage broker tell you exactly what you can borrow?
A broker can help you build a more useful estimate by reviewing your documents, clarifying your goals and comparing relevant lender policies. The outcome still depends on verification, valuation, credit assessment and approval by the lender, so a preliminary calculation is not a guarantee.
The benefit of doing this work early is clarity. You can identify gaps, understand which commitments are affecting the result and avoid shaping your property search around an unrealistic number. Loan structure matters too; once you understand your range, read our guide to choosing a fixed, variable or split home loan.
Start with a range, not a target
Your borrowing capacity should support the way you want to live, not just the property you want to buy. A practical first conversation can help you compare lender approaches, model repayments and decide what feels sustainable before you make an offer.
Talk with Prasanth at Falcon Lending Solutions about your income, deposit, commitments and plans. You will get a clearer view of the information lenders may assess and the practical next step for your situation.
General information only. This article does not take into account your objectives, financial situation or needs. Credit approval, lending criteria, fees and conditions apply.