Pre-Approval vs Full Approval: Why Pre-Approval Isn't a Guarantee

A lot of first home buyers get their pre-approval sorted, breathe a sigh of relief, and go house hunting thinking the loan part is basically done. It’s an easy assumption to make, but it’s not quite how it works, and understanding the difference between pre-approval and full approval can save you a lot of stress (and potentially a lost deposit) down the track.

What is Pre-Approval?

Pre-approval (sometimes called conditional approval) is an indication from a lender of how much they’re likely willing to lend you, based on the information you’ve provided, your income, expenses, debts and a credit check.

The key word here is indication. The bank hasn’t assessed an actual property yet, because you probably haven’t found one when you apply for pre-approval.

What is Full Approval?

Full approval (also called formal or unconditional approval) happens after you’ve found a specific property, made an offer, and the lender has assessed the actual purchase. This includes a valuation of the property itself, along with a final check of your financial situation.

This is the point where the loan is genuinely locked in, subject to settlement actually happening.

Why Pre-Approval Isn’t a Guarantee

Pre-approval feels like a green light, but there are several things that can still go wrong between pre-approval and full approval:

  • The property might not value up. If the bank’s valuation comes in lower than the purchase price, they may reduce how much they’ll lend against it.
  • Your circumstances can change. A new debt, a change in employment, or a lower credit score between pre-approval and full approval can all affect the outcome.
  • Lender policy can shift. Banks do occasionally tighten their lending criteria, and this can affect an application that’s part way through.
  • The information wasn’t fully verified. Pre-approval is often based on what you’ve told the lender, full approval involves them verifying it properly, payslips, bank statements, the lot.
  • Pre-approvals expire. Most only last 60 to 90 days, so if your house hunt drags on, you may need to renew it.

Why This Actually Matters

Understanding this difference changes how you approach buying. It means:

  • You shouldn’t bid at auction (where there’s no cooling off period in most states) purely on the strength of pre-approval alone, without factoring in the risk the valuation comes in low.
  • You should still include a finance condition in your offer if you’re buying via private treaty (see my post on How to Make an Offer), even with pre-approval in hand.
  • You should keep your financial situation steady between pre-approval and settlement, this isn’t the time to buy a new car or open a new credit card.

Case Example

Michael gets pre-approved for $700,000. He finds a property listed at $680,000 and makes an offer, which is accepted. When the bank sends out a valuer, the property comes back valued at $650,000, lower than the purchase price. The bank is only willing to lend against the lower valuation, which means Michael either needs to come up with the extra $30,000 himself, negotiate the price down, or walk away (which is only possible without penalty if he had a finance condition in his contract).

The Bottom Line

Pre-approval is a genuinely useful starting point, it tells you roughly what you can spend and shows agents you’re serious. But it’s not the finish line. Full approval is what actually locks the loan in, so keep your finances steady, keep a finance condition in your offer, and don’t count your chickens until settlement is confirmed.