Home Loan Pre-Approval and How Long It Really Lasts

You find the right house on a Saturday, the agent asks if you are "finance ready," and you realise you have no idea what your bank will actually lend you. A home loan pre-approval answers that question before the pressure starts, but it is not the guarantee many buyers think it is.

This guide explains what a home loan pre-approval is, how long it usually lasts, what can cancel it, and how to time it so it is still valid when you need it. I have watched buyers lose homes at auction because their approval lapsed a week earlier, so the timing part matters more than most people expect.

What a home loan pre-approval actually means

A pre-approval, also called conditional approval or approval in principle, is a lender saying: based on what you have shown us so far, we would likely lend you up to this amount. It is based on your income, debts, expenses, credit history and savings. It is not based on the property, because there is no property yet.

That last point is the one buyers miss. The lender still has to value the specific home you choose, check the contract and confirm nothing about your situation has changed. Until that happens, you only have a strong indication, not a loan. If the valuation comes in low, you can still fall short; our guide on what to do when a bank valuation comes in below your offer covers that scenario.

How long a home loan pre-approval lasts

Most lenders issue pre-approvals that last 90 days. Some offer 60 days, a few offer up to six months, and non-bank lenders vary widely. The expiry date is printed on the approval letter, so check it the day you receive it and put it in your calendar.

Lender type	Typical validity	Can it be extended?
Major banks	90 days	Usually, with updated payslips and statements
Smaller banks and credit unions	60 to 90 days	Often, case by case
Non-bank lenders	30 to 90 days	Sometimes, may need a full reassessment

Renewing is usually straightforward if nothing has changed. You send updated payslips from the last month and recent bank statements, and the lender reissues the approval, often within a week. If interest rates have risen in the meantime, the approved amount may drop, because lenders test your repayments at a buffer of around 3 percentage points above the actual rate.

What can cancel or shrink your approval

A pre-approval assumes your finances stay the same until settlement. These are the changes that most often cause trouble:

Changing jobs, especially into a probation period or from salary to contract work.
New debt, including a car loan, a buy now pay later plan or a raised credit card limit. A 10,000 dollar card limit can cut your borrowing capacity by around 30,000 to 50,000 dollars, even if the balance is zero.
Large unexplained deposits or withdrawals in your savings account.
Missed payments on any existing loan or bill that appears on your credit file.
Rate rises that reduce the amount you pass the serviceability test for.

The rule is simple: between pre-approval and settlement, do not change anything you do not have to. Buy the new car after you move in.

When to apply for a home loan pre-approval

Each formal application can leave an enquiry on your credit file, and many applications in a short period can make lenders cautious. So you want to apply once, at the right time, rather than getting a new approval every few weeks.

Start with an online calculator or a broker chat 3 to 6 months before you plan to buy, to get a rough range without a credit check.
Gather documents early: two recent payslips, three months of bank statements, ID, details of all debts and, if self-employed, two years of tax returns.
Apply when you are ready to make offers, ideally within a week or two of starting serious inspections.
Note the expiry date and ask your lender or broker to start renewal about two weeks before it lapses.

Before you bid or sign, also check that your budget covers stamp duty, legal fees and inspections. Our breakdown of the upfront costs of buying a home lists what to set aside beyond the deposit.

The pre-approval figure is a ceiling, not a target

Many buyers, and some agents, treat the pre-approved amount as your budget. I would push back on that hard. The lender calculates the maximum you can borrow based on its own assumptions about your living costs, which are often lower than what you really spend. It does not account for children you are planning, a career break, or the fact that you would like to go on holiday once in a while.

A practical approach is to work out the repayment you are comfortable with at a rate 2 points higher than today's, then set your price limit from that number. In many cases that lands 10 to 20 percent below the pre-approved figure. Bidding to the full approval leaves you with no room for a low valuation, a rate rise or the roof repair the inspection uncovers. That inspection is worth doing properly; see the building inspection items that actually matter.

Using your pre-approval at auctions and private sales

At a private sale, a pre-approval makes your offer more credible, and you can usually still add a finance clause to the contract for extra protection. At auction there is no finance clause. When the hammer falls, you are bound to buy, with a deposit due on the day. That makes a valid, recent approval essential.

Before any auction, call your lender and confirm three things: the approval is current, the property type is acceptable (some lenders limit small apartments or rural blocks), and they are comfortable with the suburb. Some buyers also ask for a valuation on the specific property before auction day, which removes most of the remaining risk.

Frequently asked questions

Does a home loan pre-approval affect your credit score?

It can. A formal pre-approval application usually records a credit enquiry, which may lower your score slightly for a period. One application is rarely a problem, but several in a few months can concern lenders, so avoid applying with many banks at once.

Can a bank refuse a loan after pre-approval?

Yes. The final approval depends on the property valuation, the contract and your circumstances at that time. If the home values low, your income changes or you take on new debt, the lender can reduce or decline the loan.

Is pre-approval the same as unconditional approval?

No. Pre-approval is conditional and comes before you choose a property. Unconditional approval, sometimes called formal approval, comes after the lender has valued the specific home and verified everything, and it is the stage where the loan is effectively confirmed.