Receiving an email confirming your mortgage pre-approval is a massive milestone. It means the bank has reviewed your income, scrutinized your expenses, and given you the green light to go house hunting with a specific budget in mind.

But a pre-approval is not a finalized mortgage. It is a "conditional" agreement. Many buyers make the mistake of thinking they have a blank cheque, leading to disastrous financial missteps before settlement.

In this guide, we break down exactly what a pre-approval means, how long it lasts, what you must avoid doing while it’s active, and how to convert it into an unconditional loan.

1. What Exactly IS a Pre-Approval?

A mortgage pre-approval is a formal indication from a lender that they are willing to lend you up to a certain amount, provided the property you find meets their security criteria and your financial situation does not change.

Think of it as the bank approving you, but they still need to approve the house.

Your pre-approval letter will contain specific conditions. Common conditions include:

  • Registered Valuation: The bank may require an independent valuer to confirm the property is actually worth what you are paying for it.
  • Building Report: The bank may require a clean builder's report to ensure they aren't lending against a leaky or structurally unsound building.
  • Satisfactory Insurance: You must prove you can get full replacement insurance on the property.

2. The 90-Day Clock

In New Zealand, almost all main bank pre-approvals are valid for exactly 90 days from the date they are issued.

Why 90 days? Because a lot can change in three months. Interest rates can shift, your employment status could change, or the Reserve Bank could introduce new lending restrictions (like DTI caps).

What happens if you don't find a house in 90 days?
You do not have to start from scratch. If your 90-day window is approaching and you haven't found a home, your broker can apply for an extension or a "refresh." This usually requires providing your latest two payslips and a fresh month of bank statements to prove nothing material has changed.

3. What NOT To Do During Pre-Approval

This is the most critical section of this guide. A pre-approval is highly fragile. Because the bank will do a final check before issuing the formal loan documents, any change to your financial profile can cause them to revoke the pre-approval.

During the 90-day pre-approval period, you must absolutely avoid:

  • Taking on New Debt: Do not buy a new car on finance. Do not apply for a new credit card. Do not put a new couch on Afterpay. Any new debt changes your uncommitted monthly income (UMI) and will trigger a recalculation of your affordability.
  • Changing Jobs: Even if a new job offers a higher salary, banks hate probationary periods. If you switch jobs, the bank will often pause your application until you are past the 90-day trial period.
  • Spending Your Deposit: If you told the bank you have a $100,000 cash deposit, that money needs to stay in your account. Do not use it for a holiday or an emergency expense.
  • Messy Account Conduct: Continue to pay all your bills on time. A bounced direct debit a week before settlement can cause immense stress.

4. Finding the Property: The "Subject to Finance" Clause

When you find a house you want to buy, you will sign a Sale and Purchase Agreement. Even though you have a pre-approval, you must always include a "Subject to Finance" condition (usually 10 to 15 working days).

Why? Because the bank still needs to approve the specific house. If you go unconditional without a finance clause and the bank discovers the house is an unconsented monolithic clad building (a massive risk), they will refuse to lend the money. You would then lose your deposit and potentially be sued by the seller.

5. Converting Pre-Approval to Unconditional

Once your offer is accepted, the race begins. You send the signed Sale and Purchase Agreement to your broker. We immediately send it to the bank.

The bank’s credit team will review the property. If it’s a standard, well-built home in a good area, they will usually sign it off within 48 hours. They will issue an "Unconditional Loan Offer."

At this point, you instruct your lawyer to confirm the finance condition with the seller's lawyer. Your purchase is now unconditional. The house is yours.

6. Settlement Day

The final step in the timeline is Settlement Day. This is usually 30 to 60 days after going unconditional.

A few days before settlement, you will visit your lawyer to sign the final mortgage documents and the property transfer forms. On settlement day, the bank transfers the loan funds to your lawyer, who transfers them to the seller.

Once the funds clear, the real estate agent hands over the keys.

Summary

Pre-approval is the starting gun for your house hunt, not the finish line. By understanding the 90-day timeline, keeping your finances rock-solid, and using a "Subject to Finance" clause, you ensure a smooth transition from hunting to owning.

If you don't have pre-approval yet, or if your current one is about to expire, contact Finch Mortgage. We can secure a rock-solid pre-approval that gives you the confidence to bid at auction or make a strong offer.