How Pre-Approval Works (and When It Can Be Withdrawn)
Pre-approval is one of the most misunderstood steps in getting a home loan. Done properly, it tells you what a lender is prepared to lend before you make an offer on a property. But not all pre-approvals are created equal, they expire, and in some situations they can be withdrawn. Here is how the process actually works, and how to make yours count.
What pre-approval actually is
Pre-approval — also called conditional approval or approval in principle — is a lender's assessment of you as a borrower before you have a property. The lender looks at your income, living expenses, existing debts and deposit, applies its serviceability buffer (lenders typically assess your repayments at around 3 percentage points above the actual rate), and tells you the maximum amount it is prepared to lend, subject to conditions.
That number does three useful things. It sets a realistic price range for your search, it lets you make offers or bid at auction with confidence, and it flushes out problems — like a credit file issue or an expense you had not accounted for — while there is still time to fix them.
What pre-approval is not
Pre-approval is not a guarantee of finance. Every pre-approval is conditional, usually on three things: the property you buy being acceptable security, your financial circumstances not changing, and the information you provided checking out during full verification. It is also not a locked-in interest rate — rates can move between pre-approval and settlement unless you separately pay for a rate lock at the fixed-rate stage.
It does not commit you to that lender either. You can walk away at any time, and a pre-approval with one lender does not stop you applying elsewhere — although multiple credit enquiries in a short window can drag on your credit score, so it pays to pick the right lender first rather than collecting pre-approvals.
Finally, the pre-approved amount is a ceiling, not a target. The lender has assessed what it can recover, not what leaves you room for renovations, children, career changes or a life outside the repayments. Buying comfortably below your maximum builds in a buffer that no lender will build in for you.
System-generated vs fully assessed pre-approval
This distinction matters more than most borrowers realise. Some lenders issue system-generated pre-approvals: software checks the numbers you typed in, runs a credit check, and spits out a letter — often within minutes. No human has verified your payslips or bank statements. These approvals are quick but fragile, because problems only surface later when a credit assessor finally reviews your file.
A fully assessed pre-approval means a credit assessor has reviewed your actual documents — income evidence, statements, liabilities, credit file — and signed off. It takes days rather than minutes, but it is far more reliable when you are about to commit at an auction with no finance clause. Ask your lender or broker directly which type you have; brokers know which lenders genuinely assess upfront and can steer you accordingly.
A 15-minute chat is usually enough to map your options — free, no obligation.
How long pre-approval lasts
Most pre-approvals are valid for three to six months, depending on the lender. If yours expires before you buy, it can usually be renewed, but the lender will want updated payslips and statements and may run a fresh credit check. Be aware that a renewal is a re-assessment: if interest rates, lender policy or your circumstances have shifted in the meantime, your approved amount can change — in either direction. If your search is dragging on, check your borrowing power again with our [borrowing capacity calculator](/calculators/borrowing-capacity) and ask your broker whether your pre-approval still reflects reality. It is far better to discover a changed number from your desk than at an open home — or worse, after your offer has been accepted.
When pre-approval can be withdrawn
A pre-approval can be withdrawn or fail to convert into formal approval for reasons on both sides:
- Your circumstances change — you switch jobs, go on probation, take on a new car loan or credit card, or your income drops
- New credit enquiries appear on your file that were not in the original application
- The lender changes its credit policy or assessment buffer between pre-approval and purchase
- The property does not stack up — the valuation comes in below the price you paid, or the security type is outside policy (some lenders decline high-density apartments, very small units, flood-prone land or unusual titles)
- Verification turns up information that differs from what was declared
The practical advice is simple: between pre-approval and settlement, keep everything steady. Do not change jobs if you can avoid it, do not open new credit, and keep your spending consistent with what the lender assessed.
How to make your pre-approval count
Get pre-approved before you start seriously inspecting properties, not after you have found the one — first home buyers especially should read our [first home buyer guide](/articles/first-home-buyers/first-home-buyer-guide) for how pre-approval fits the wider journey. Have your documents ready so the assessment is fully verified rather than rushed. Buy within your approved amount rather than at its ceiling, and tell your broker immediately if anything in your life changes. If you are comparing lenders, weigh more than the headline rate — approval speed, valuation policy and how each lender treats your specific [home loan](/loans/home-loans) scenario all matter when a contract deadline is ticking.
Talk it through with a broker
A broker can tell you which lenders fully assess pre-approvals, which suit your income situation, and how much you can realistically borrow before you start inspecting. If you want a pre-approval that will actually hold up on auction day, [contact us](/contact) and we will map it out with you.
Frequently asked questions
How long does home loan pre-approval take?
System-generated pre-approvals can be issued within hours, but a fully assessed pre-approval — where a credit assessor reviews your documents — typically takes a few business days, longer if the lender is busy or your situation is complex. The assessed version is slower but far more dependable when you are ready to commit to a purchase.
Does pre-approval guarantee my home loan will be approved?
No. Pre-approval is always conditional — usually on the property being acceptable security, your circumstances staying the same, and your documents verifying cleanly. Formal approval only comes after the lender values the specific property you buy. Most pre-approvals convert smoothly, but treating one as a guarantee is how buyers get caught out at auction.
Does getting pre-approval affect my credit score?
Most lenders run a credit check for pre-approval, which records an enquiry on your file. One enquiry has a minor effect, but several applications with different lenders in a short period can noticeably drag your score down and make later lenders cautious. Choose your lender deliberately rather than collecting pre-approvals for comparison.
Can I make an offer or bid at auction without pre-approval?
You can, but it is risky. A private treaty offer can include a subject-to-finance clause as protection, but auction purchases are unconditional — if your finance falls through you can lose your deposit. If you are heading to auction, a fully assessed pre-approval and a clear maximum bid are the sensible minimum.
What happens if my pre-approval expires before I find a property?
You can ask the lender to renew it, which usually means providing updated payslips and bank statements and possibly a fresh credit check. Because renewal is a re-assessment, changes to rates, policy or your finances since the original approval can change the amount you are approved for.