Pre-approval vs unconditional approval: the four stages of an Australian home loan

A pre-approval letter is the most over-trusted document in Australian property. Buyers wave it at open homes, sign contracts with it tucked under the cover sheet, and assume the loan is functionally locked in. It is not. A pre-approval is a conditional, time-limited expression of interest from a lender, based on a hypothetical property and a serviceability snapshot that may already be stale by the time you find a house. Four distinct rungs sit between "I'd like to buy" and "the bank will fund settlement." Knowing which rung you are standing on is the difference between losing a deposit and closing the deal.

Rung 1: indicative borrowing capacity

This is the number an online calculator spits out after you type in your income, expenses, and existing debts. Some lenders dress it up as an "online estimate" or a "quick quote" with your name on the PDF. It usually involves either no credit check at all or a soft enquiry that does not sit on your credit file.

Legally it means nothing. The bank has not seen your payslips, has not looked at three months of transactions, and has not verified that the deposit in your savings account is yours rather than a parental loan. It is a planning number, useful for working out whether you are a $500k buyer or a $900k buyer before you take a weekend off for inspections. The platform's borrowing power estimator sits at this rung: helpful to ballpark, useless to wave at a vendor.

Rung 2: pre-approval (conditional approval)

Pre-approval is a formal application with documents, a hard credit enquiry, and an assessor putting your file through the bank's serviceability model. It is what most buyers mean when they say "I'm approved."

At this stage the lender wants two recent payslips, photo ID, three months of transaction-account statements, a list of liabilities (cards, BNPL, HELP, car loans), and savings statements showing genuine deposit funds. Self-employed applicants need two years of tax returns and a current BAS. The bank runs serviceability against current rates plus the APRA buffer, checks your credit file, and issues a letter that usually reads something like: "subject to a satisfactory valuation, satisfactory contract of sale, and no material change in your circumstances, we are prepared to lend up to $X."

Pre-approvals typically last 90 days, sometimes 60. The hard enquiry sits on your credit file for five years. The letter is genuinely useful at auctions and on offers because vendors take it as evidence you are not a tyre-kicker. What it is not is binding. Three things can still kill the deal between pre-approval and settlement: the property, your circumstances, and the lender's policy.

Rung 3: formal approval on a specific property

Once you have a contract, the bank attaches your pre-approval to that specific property and orders a valuation. You hand over the contract of sale, a building insurance binder (proof you have arranged cover from the settlement date), and any updated payslips if pre-approval is more than a few weeks old. The assessor re-runs serviceability against your current numbers and the actual loan-to-value ratio that the valuation supports.

Most conditions are cleared at this stage except the property-specific ones. Turnaround is usually 7 to 14 business days, longer in a hot market when valuation panels are stretched. The letter you receive will read "formal approval" or "approval in principle" and will still carry one or two remaining conditions: receipt of signed mortgage documents, confirmation of insurance, and sometimes a final compliance check.

Rung 4: unconditional approval

Unconditional approval is the only rung at which the loan is actually committed. Every condition has been cleared, the mortgage documents are signed, insurance is in place, and the funds will be available at settlement. The letter is short and reads "unconditional approval" with no remaining subjects.

This is the only stage at which a buyer should sign an unconditional contract or waive a subject-to-finance clause. Anything before unconditional approval and you are betting the deposit on a process that has not finished.

The valuation trap

The single most common reason a pre-approved loan falls over is the property valuation coming in below the contract price. Pre-approval was issued against a hypothetical property worth whatever you said you might pay. The actual valuer the bank engages does not care what you paid; they care what the property is worth on a comparable-sales basis.

Worked example. A buyer is pre-approved for $760,000 against a 20% deposit, signs a contract at $750,000, and the bank's valuation comes in at $720,000. The lender will fund 80% of $720,000, which is $576,000. The buyer needs $750,000 minus their $150,000 cash deposit, or $600,000 of debt. The shortfall is $24,000 in cash, payable before settlement, or the deal collapses. If the contract is unconditional at this point, the deposit is forfeit and the vendor can sue for damages.

The hard credit-check trap

Every formal pre-approval triggers a hard enquiry on your credit file that sits there for five years. Comprehensive credit reporting now means lenders see not just the existence of the enquiry but the pattern. Three pre-approvals in six months is read as a buyer who is either being knocked back repeatedly or who is unable to make a decision. Both are credit-score negatives.

The right sequence is to shop around the edges first. A mortgage broker can run policy comparisons across panels without lodging formal applications. Online calculators give indicative numbers. Only once you have a shortlist of one or two lenders should you lodge a formal pre-approval. Filing with five lenders to "see which one gives the highest number" is the most expensive way to find out.

The pre-approval expiry trap

Pre-approvals run for 60 to 90 days. If you cannot find and contract a property in that window, you renew, and renewal is not a stamp exercise. The lender re-runs serviceability against current rates, current income, and the current APRA buffer (still 3 percentage points above the offered rate as of 2026).

In a rising-rate environment this hurts. A buyer pre-approved at a quoted rate of 6.00% was being tested at 9.00%. If rates have moved to 6.50% by renewal, the test is now 9.50%, and the same income that supported $760,000 of capacity might only support $660,000 to $700,000. The same applies in reverse during a cutting cycle, but the asymmetry of the property market means buyers usually find rates moving the wrong way at the wrong time. Pre-approval is a snapshot, not a guarantee, and the snapshot rebases at renewal.

Pre-approval and subject-to-finance are different things

Buyers conflate these two and lose money on the confusion. Pre-approval is the lender's conditional commitment to you. A subject-to-finance clause is the buyer's escape route in the contract with the vendor. They exist independently. Pre-approval does not include a subject-to-finance clause; the clause has to be written into the contract by your solicitor or conveyancer.

Even with a pre-approval letter in hand, every contract should carry a subject-to-finance clause unless and until you have unconditional approval in writing. The clause typically runs 14 to 21 days from signing and gives the buyer a clean exit, with deposit returned, if finance is not formally approved by the deadline. Detail on how these clauses are drafted and used sits in the companion piece on subject-to-finance and inspection clauses.

What can break between each rung

The risks compound as you climb. Between rung 1 and rung 2: nothing, because nothing has been promised. Between rung 2 and rung 3: valuation comes in low, a credit-card balance you forgot to mention surfaces in the assessor's recheck, the bank tightens policy in a quarterly review and your file now sits outside appetite. Between rung 3 and rung 4: insurance falls through, you change jobs, you take out a car loan because the salesperson said it would not affect the mortgage. All of these have killed deals in the days before settlement. The serviceability mechanics behind every recheck are the same as those covered in the borrowing power vs serviceability piece.

The rule between pre-approval and settlement is to do nothing that changes the picture the bank approved. No new debt, no quitting your job, no shifting savings out of view. If you have to do something that materially changes your file, tell the lender first.

Cash buyers benefit from a paper trail too

Cash buyers do not need pre-approval but they do need to prove funds. A vendor agent asked to choose between two equal offers will pick the one with documented capacity to settle. A bank cheque, a screenshot of available funds, a solicitor's trust-account confirmation, or a letter from a private banker all serve the same purpose as a pre-approval letter: evidence that the buyer can do what they say they will do.

The one-line version

Indicative is free, pre-approval is conditional, formal approval is property-specific, unconditional is the only stage at which the loan is real. Ballpark the number with the borrowing power estimator, get pre-approved before you bid, keep subject-to-finance in every contract until unconditional approval lands in writing, and do nothing between rung 2 and rung 4 that would change the file the bank already signed off on.