Three markets, bought without seeing the homes.

Pre-approval is a lender's view of how much it may lend if its conditions are met. It helps set a search budget, but is not a promise of a loan. Final approval still depends on the property, the lender's view of its value and any other conditions that remain.
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The lender checks financial details to see whether you can afford repayments. These can include income, savings, spending, existing loans and credit history. The depth of the check matters. A calculator result does not show that a lender has checked a loan application.
Conditional means some requirements remain. The lender may need newer documents or more proof. The letter states the amount considered and what remains to be done. It does not hold a home for you or make the seller agree to sell. It also does not add a finance condition to the sale contract.
The lender also checks the home offered as security, meaning the asset backing the loan. It may need a valuation, which is a check of the home's value. It may also need more purchase details. The sale price can differ from the value it accepts. The earlier approval does not rule out a funding gap.
Changes in work, spending or debt can affect the final loan check too. Pre-approval reflects the details checked at that time. The expiry date and renewal steps differ between lenders. A general guide to how long approval lasts cannot replace the date in the buyer's own letter.
The loan and purchase contract are separate agreements. A finance clause sets a loan-related condition for the sale to go ahead. It also sets any rights and deadlines for ending the sale. Pre-approval does not create those rights. The agreed contract wording does.
Auctions generally have no cooling-off period. Adding contract conditions needs the seller's agreement. A buyer may therefore have a binding duty to buy while their loan remains conditional. The conveyancer explains the contract. The lender or broker explains the finance. Both are part of the purchase, but their documents deal with different matters.
For investors
An investor's finances are only part of the lender's check. The lender may not yet have accepted the chosen home. Expected rent does not remove the need for a valuation or documents. Possible lending, purchase costs and ongoing bills are separate amounts. Keeping them distinct helps explain what the letter confirms and what still needs to happen.
Common questions
Keep learning
Pre-approval is one piece of it. A purchase runs on deadlines, contracts and people working for different sides. Next, read about borrowing capacity, property valuation and mortgage broker.
If you want help
Four questions to ask any agency, with our answers.
You do. Never a developer or the selling agent, who works for the vendor.
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