Home loan pre-approval is a lender's conditional agreement to lend you up to a set amount, based on a check of your income, expenses, debts and credit file before you've chosen a property. It usually lasts three to six months. It is not a guarantee: the lender still has to approve the property and re-check your situation before the loan becomes formal.
Pre-approval turns “I think we can afford around this much” into a number a lender has actually checked. For a first-home buyer it sets the ceiling for every open home you walk into. For a first-time investor it does the same job, and it also tells you whether the deal you're modelling is one a lender will back.
This guide covers what pre-approval is, when to get it, how long it lasts, and the part most guides skip: the ordinary things that can shrink your approved amount between the day you get it and the day you settle.
What does pre-approval actually mean?
Pre-approval means a lender has looked at you, the borrower, and is prepared to lend up to a certain amount if the property and your circumstances check out later. It's also called conditional approval or approval in principle, although some lenders use those terms for slightly different stages.
Not every pre-approval is assessed to the same depth. Some lenders issue one quickly from an automated check, while others have a credit assessor review your payslips, bank statements and credit file first. A fully assessed pre-approval is the one worth relying on, because fewer surprises turn up later.
From Scott
The thing first-timers most often misunderstand is that not all pre-approvals are the same. Some are produced by a lender's system and are indicative only. Others are fully assessed, so they're conditional only on the property you buy and on nothing changing in your circumstances. Different lenders offer different types, so it's worth knowing which one you have.
Pre-approval, conditional approval and formal approval compared
| Stage | When it happens | What the lender has checked | The property |
|---|---|---|---|
| Pre-approval | Before you make offers | Your income, expenses, debts and credit file | Not yet chosen |
| Conditional approval | After your offer is accepted | You again, plus the property itself | Subject to valuation |
| Formal (unconditional) approval | Before settlement | Everything, including a satisfactory valuation | Approved as security |
When should you get pre-approved?
The right time is when you're looking to buy within the next three to six months, not when you first start browsing listings. Get it too early and it can lapse before you find the right place. Get it too late and you can miss a property, or bid at auction without knowing your real limit.
- Your deposit is saved, or you know exactly where it's coming from (savings, a gift, a guarantor or a government scheme).
- Your income has settled: you're past probation, or you have enough history as a self-employed borrower.
- You've cleaned up small debts and closed credit cards you don't use.
- You have a rough price range and areas in mind, so the pre-approval matches what you'll actually buy.
From Scott
If you're looking to buy within the next three to six months, that's the time to get pre-approved. If it's further away than six months, or you don't yet have the savings you'll need, there's no benefit in getting pre-approval yet.
If you're using the 5% deposit scheme, the lender has to be one of the scheme's participating lenders, so choose the lender before you apply. Start with a realistic estimate from the borrowing capacity calculator, then get pre-approved once the number and the timing both make sense.
How to get pre-approved, step by step
- Work out your likely budget, including stamp duty, legal fees and any lenders mortgage insurance.
- Gather your documents: photo ID, recent payslips, bank statements showing your savings, and details of every debt and credit card limit.
- Choose the lender whose policy suits your situation. Lenders differ on how they treat bonuses, overtime, casual income, HECS and rent, so the right choice can change your number.
- Apply once. The lender checks your credit file and assesses your application.
- Receive your pre-approval letter, note its expiry date, and shop within it.
What can shrink your pre-approval before settlement?
Your pre-approved amount isn't locked in. Lenders test whether you could still afford the loan if rates were about 3% higher, so small changes to rates, debts or income move the number more than most people expect. Here's an example, computed with the same engine as our borrowing calculator.
The example: a couple on $85,000 and $65,000, no children, no other debts, buying a home to live in, assessed at a 6.25% variable rate. Their indicative borrowing power is $705,000. Each row changes one thing after they're pre-approved.
| What changes | New borrowing power | Reduction |
|---|---|---|
| Variable rates rise 0.25% (to 6.50%) | $690,000 | −$15,000 |
| Variable rates rise 0.5% (to 6.75%) | $675,000 | −$30,000 |
| You open a credit card with a $10,000 limit | $655,000 | −$50,000 |
| You take on a $600 a month car loan | $630,000 | −$75,000 |
| One partner drops to part-time ($40,000) | $635,000 | −$70,000 |
Indicative estimates only, using the calculator's assumptions as at July 2026. Every lender assesses differently, so your own figures will vary. Try your own numbers in the borrowing capacity calculator.
The surprise for most people is the credit card. Lenders assess a card on its limit, not its balance, so a $10,000 card you never use still costs this couple $50,000 of borrowing power. A $600 a month car loan costs them $75,000, which can be the difference between a property and the one next door.
The simple rule: between pre-approval and settlement, don't take on new credit, don't change jobs without talking to your broker first, and keep your savings where the lender can see them.
From Scott
The change I see most often between pre-approval and formal approval is a change of job. The lender may need to reassess your income, and if the new job doesn't meet its policy, it can mean moving to a different lender.
Pre-approval at auction and when making an offer
Pre-approval matters most at auction. A successful auction bid is generally unconditional, so you can't usually make the purchase subject to finance. If you bid without a solid pre-approval and the lender later values the property lower or declines the loan, you can still be bound to buy it.
For a private sale, pre-approval lets you make a cleaner offer and sign quickly once it's accepted. Many buyers still include a finance clause in the contract, which gives the lender time to value the property and issue formal approval.
Valuation is the step pre-approval can't cover. If the lender values the property below the price you pay, it lends against the lower figure, and you make up the gap from your own funds. That gap is one more reason to keep a buffer rather than spending your whole pre-approved amount.
From Scott
I speak to real estate agents all the time, and they want to deal with buyers who have pre-approval. It tells them you're serious and ready to act, and it makes your offer more favourable when they put it to the vendor.
What happens if your pre-approval expires?
An expired pre-approval isn't a setback. The lender reassesses you with updated payslips and bank statements, and if rates, policy or your income have moved, the new amount moves with them. Sometimes that's a good moment to check whether the same lender still suits you best.
From Scott
Depending on how your property search is going, and on the lender, we may ask for an extension. But if your circumstances have changed and buying in the next three to six months no longer looks realistic, I'll usually let it lapse and apply again when you're ready.
Pre-approval for an investment property
Investors go through the same process, but lenders add a share of the expected rent to your income and assess the loan at investor rates. That's why a first-time investor's number can differ noticeably from an owner-occupier's on the same salary. The guide to how much you can borrow for an investment property explains the rent side, and buying your first investment property covers how we set the loan up with your next purchase in mind.
Getting pre-approved with koala financial
A broker's job at this stage is choosing the lender whose policy fits you before anything is lodged, so you apply once and the number holds up at settlement. If you're buying your first home, first home buyer loans walks through how Scott helps from pre-approval through to the keys.
Everyone's situation is different. If you'd like to know what you could be pre-approved for, book a free discovery call.
Frequently asked questions
How long does home loan pre-approval last?
Pre-approval usually lasts between three and six months, depending on the lender, and some lenders can extend it. If it runs out before you buy, most lenders will reassess you with updated payslips and bank statements, and the new amount can be higher or lower than the original.
Does pre-approval affect my credit score?
A full pre-approval application is normally recorded as a credit enquiry on your credit file. One or two well-timed enquiries are a normal part of buying, but several applications with different lenders in a short period can make you look riskier to the next lender, so it pays to apply once, with the right lender.
Can a lender say no after pre-approval?
Yes. Pre-approval is conditional. The lender still has to value the property, re-check your income and spending, and confirm nothing has changed. If the valuation comes in low, your circumstances change, or the property doesn't meet the lender's rules, formal approval can be reduced or declined.
Is pre-approval the same as a borrowing power calculator?
No. A calculator gives you an indicative estimate from the numbers you type in. Pre-approval is a lender's conditional commitment after it has checked your documents and credit file, so it carries far more weight with agents and vendors.
Last updated: October 2026
This article is general information only. It doesn't take into account your objectives, financial situation or needs, and it isn't credit, financial or tax advice. Figures are indicative estimates that vary by lender, state and property and can change, so we confirm your real numbers before you act. For tax questions, speak to a registered tax agent or accountant. Scott Lung, credit representative 567904 of Purple Circle Financial Services Pty Ltd (Australian Credit Licence 486112).
5 finance decisions to get right before buying your first investment property
- Build your first investment with a long-term property strategy.
- Understand the finance decisions that shape your borrowing power and future options.
- Make smarter decisions around your deposit, cash flow and loan structure before you sign a contract.
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