Avoid These 5 Pre-Approval Mistakes on Investment Loans

Why Pre-Approval Matters for Property Investors

Pre-approval tells you how much a lender will commit to lending before you sign a contract. It locks in your borrowing capacity for three to six months, depending on the lender, and means you can move quickly when you find a property that fits your strategy.

In our experience, buyers who skip pre-approval often underestimate how much serviceability affects investor borrowing. Lenders assess rental income at a discounted rate, typically 75 to 80 per cent of the expected rent, to account for vacancy periods and holding costs. At the same time, APRA requires lenders to stress-test your ability to service the loan at a rate at least three percentage points above the actual product rate. For someone already carrying a mortgage on their home, these two factors can reduce the amount you can borrow by 20 to 30 per cent compared to what online calculators suggest. Pre-approval removes the guesswork.

Consider a buyer in Mount Eliza who earns $120,000 and already has a $500,000 mortgage on their owner-occupied home. They assume rental income of $600 per week will support another $600,000 loan. At a discounted rental income of 75 per cent and a serviceability buffer of three percentage points, the lender may approve only $420,000. Without pre-approval, they make offers on properties they cannot afford, lose deposit bonds, and waste weeks chasing a deal that was never viable.

Mistake One: Assuming Your Home Loan Capacity Transfers to Investment Borrowing

Lenders treat investment loans differently from home loans because the income stream is less certain and the risk profile is higher. Where an owner-occupier loan might assess your full salary, an investment loan also has to account for the property not being rented for part of the year, even if the suburb has a low vacancy rate.

The discounted rental income means you need a higher base income or lower existing debt to borrow the same amount on an investment property as you would on your own home. If you are refinancing an existing investment loan or adding a second property to your portfolio, every loan is re-assessed together. The lender looks at your total debt, total income, and total living expenses. One high-interest personal loan or a car loan with two years left to run can reduce your investment borrowing capacity by tens of thousands of dollars.

Mistake Two: Not Structuring Your Deposit and Equity Release Correctly

Pre-approval depends on how much usable equity or cash deposit you can show. If you plan to use equity from your home, the lender will value that property as part of the assessment. Valuations ordered by the lender are often more conservative than online estimates or recent sales in your street, especially if the market has softened or if comparable sales are limited.

Under current prudential standards, lenders aggregate loans secured over the same property when calculating the loan-to-value ratio. If you already have a mortgage and an offset account on your home, the offset balance does not reduce the loan amount for LVR purposes. You need to show that after releasing equity, your total borrowing against the property stays within the lender's policy, typically 80 per cent LVR to avoid Lenders Mortgage Insurance, or up to 90 per cent if you are willing to pay the premium.

As an example, someone with a home valued by the lender at $900,000 and an outstanding mortgage of $400,000 has $320,000 in usable equity at 80 per cent LVR. If they want to access $350,000, they will either need to pay LMI or put the loan into a lower LVR band by adding cash. Structuring this before you apply means the pre-approval reflects what you can actually deploy, not what you hoped to access.

Mistake Three: Choosing the Wrong Loan Product Before Pre-Approval

Some buyers lock themselves into a product type before understanding what the lender will approve. Interest-only loans are common for investors because they reduce the monthly repayment and maximise tax-deductible interest, but not every lender offers interest-only on every loan type, and some cap the interest-only period at five years.

If you apply for an interest-only loan above 80 per cent LVR and the interest-only term is longer than five years or unspecified, the loan may be classified as non-standard under APS 112, which attracts higher capital costs for the lender and often results in a declined application. Similarly, if you apply for a fixed rate and your circumstances change before settlement, you may face break costs if you need to restructure. Pre-approval should test your serviceability on the loan structure you intend to use, not a generic variable rate principal-and-interest loan that does not match your strategy.

When working through investment loans, we typically model serviceability on both variable and fixed rates, and on both interest-only and principal-and-interest repayment types, so you can see which structure the lender will support and which one aligns with your cash flow.

Mistake Four: Not Declaring All Income and Liabilities Upfront

Pre-approval is only as solid as the information you provide. If you understate your living expenses, fail to declare a second job with irregular hours, or forget to mention a Buy Now Pay Later account, the formal approval can come back conditional or declined once the lender runs a full credit check and requests payslips and bank statements.

Lenders assess borrowing capacity using a combination of the information you declare and the information they pull from credit bureaus and document verification. Rental income from an existing investment property needs to be supported by a lease agreement and evidence of payment into your account. If the property has only been tenanted for two months, some lenders will not include that income at all. If you receive bonuses or commissions, the lender will average them over one or two years and may apply a further discount.

The same applies to liabilities. If you have a credit card with a $20,000 limit, the lender assesses serviceability as though you are using the full limit, even if the balance is zero. Closing unused accounts before you apply can lift your borrowing capacity by $50,000 or more, depending on your income and other commitments.

Mistake Five: Waiting Until You Find a Property to Start the Process

Pre-approval takes one to two weeks once you submit all documents, longer if the lender requests additional information or if your income structure is complex. If you wait until you have signed a contract, you are running the approval process inside a settlement period that may be only 30 or 60 days, leaving no margin for delays, requests for further information, or a valuation that comes in under the purchase price.

In a market where vendors expect unconditional or short-condition offers, a buyer with pre-approval in hand can negotiate with confidence and remove finance conditions within days rather than weeks. For investors buying in areas with strong rental demand such as the Mornington Peninsula, where properties can attract multiple offers, pre-approval is the difference between securing the deal and being told your offer arrived too late.

If you are buying a property that qualifies as an eligible new build under the current legislation, you may also have access to different tax treatment from 1 July 2027. Knowing your borrowing capacity in advance gives you time to model different purchase scenarios and settlement dates without the pressure of a contract countdown.

Call one of our team or book an appointment at a time that works for you, and we will walk through your income, equity position, and the loan structure that supports your property investment strategy before you make an offer.

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