First Home Buyers
How home loan pre-approval actually works
6 min read · By Daniel Lagden · 18 June 2026
The short version
- Pre-approval is a lender's conditional agreement to lend up to a set amount, subject to a suitable property and final checks.
- A properly assessed pre-approval is very different from an instant online estimate.
- It usually lasts around 90 days and can affect — but doesn't guarantee — final approval.
- Get it before you start making offers, not after.
Pre-approval is the step that turns 'we're thinking about buying' into 'we can act'. It's a lender looking at your real financial position and agreeing, in principle, to lend you up to a certain amount — provided you then buy a suitable property and nothing material changes.
Real pre-approval vs an online estimate
The 'how much can I borrow?' tools on comparison sites are estimates. They don't verify your income, check your living expenses, or look at your credit file. A real pre-approval involves a lender (or your broker on their behalf) assessing payslips, statements, debts and expenses against that lender's policy.
The difference matters at auction or in a negotiation. A genuine pre-approval means you can bid or offer with confidence. An estimate can leave you committing to a price the bank later won't fund.
What lenders check
- Income — salary, and for self-employed applicants, tax returns and financials.
- Existing debts — credit cards, car loans, HECS/HELP, buy-now-pay-later.
- Living expenses — assessed against benchmarks as well as your actual spending.
- Credit history — your repayment track record and any defaults.
- Deposit and its source — including whether it's genuine savings or a gift.
How long does it last?
Most pre-approvals are valid for around 90 days. If you haven't found a place by then, it can usually be renewed, with updated documents. Rates and policies can shift in that window, which is one reason we keep an eye on your file rather than setting and forgetting.
Pre-approval is conditional, not a guarantee. Final approval still depends on the specific property valuing up, your circumstances staying the same, and the lender's final checks. Don't waive your finance clause on pre-approval alone without advice.
How to get one that counts
Get your documents in order, avoid new debts or big lifestyle changes, and have your broker match you to a lender whose policy fits your situation. A pre-approval from the wrong lender can be declined at the final step for reasons a broker would have seen coming.
Run the numbers
Frequently asked questions
Does pre-approval affect my credit score?
A pre-approval that involves a credit enquiry can leave a mark on your credit file, and multiple enquiries in a short period can affect your score. This is one reason to avoid applying to several lenders at once — a broker helps you target the right one first time.
Can a pre-approval be declined at final approval?
Yes. Pre-approval is conditional. It can fall over if the property doesn't value up, your income or debts change, or final verification turns up something the lender wasn't comfortable with. Choosing the right lender up front reduces this risk.
How long does pre-approval take to get?
With documents ready, some lenders return a properly assessed pre-approval within a few business days, though it varies with lender workload and the complexity of your situation. Self-employed and complex files can take longer.
