Unlock the secrets to investment loan approval

Getting your investment loan approved depends on rental income lenders will never see

Lenders assess your investment loan using rental income that doesn't exist yet and expenses they calculate differently to what you'll actually pay. The approval depends less on the property you're buying and more on how the lender's policy treats debt you already have, rental income they'll accept, and living costs they think you need.

Every application is a negotiation between what you know your finances can handle and what the lender's serviceability model will approve. That gap is where most applications fail or succeed.

Serviceability gets calculated with a rental discount and a rate you won't pay

Your income minus your expenses equals what's left to service the loan. Lenders discount rental income by 20 per cent to account for vacancy and maintenance, so a property renting for $600 per week only contributes $480 in their calculation. They also assess the loan at a rate roughly 3 percentage points above the actual product rate under APRA's buffer requirement, so even if you're borrowing at 6.2 per cent variable, serviceability runs at 9.2 per cent or higher.

Consider a buyer with $120,000 household income applying for a $500,000 loan on a property generating $550 per week in rent. The lender includes $440 per week after the 20 per cent shading, adds that to the buyer's salary, then deducts living expenses using the Household Expenditure Measure and existing debt repayments at the buffered rate. If the buyer has a $400,000 owner-occupied loan and two car loans, those get assessed at rates between 9 and 11 per cent depending on the lender. The rental income helps, but it rarely compensates for the new debt being assessed at the higher buffer rate. The buyer might only qualify for $420,000, not the $500,000 they need.

That's why structuring matters before you apply. Clearing short-term debt, switching credit cards to lower limits, or refinancing your owner-occupied loan to a lender with better investor serviceability can recover $80,000 to $100,000 in borrowing capacity without changing your actual financial position.

Debt-to-income limits cut capacity even when serviceability says yes

APRA's debt-to-income restriction limits how much of a bank's lending can go to borrowers with total debt six times income or above. The cap applies separately to investor and owner-occupier portfolios and gets measured each quarter.

If your household income is $140,000 and you're carrying a $600,000 home loan, adding a $400,000 investor loan pushes total debt to $1,000,000 or just over seven times income. Some lenders will decline that application even if serviceability works, particularly late in a quarter when they're close to the 20 per cent threshold. Others price it higher or require a larger deposit to reduce the loan amount below the six-times line.

You won't always know which lenders are near their limit in any given month. A broker sees the pattern across multiple applications and knows which lenders are still lending above six times income without pricing penalties. That's not public information, and it changes quarterly.

Interest-only repayments buy time but reduce how much you can borrow

An interest-only structure on your investment property finance lowers the monthly repayment and can improve cash flow if the rent doesn't cover a principal-and-interest repayment. Lenders assess interest-only loans over a shorter term, usually 25 years instead of 30, and that reduces serviceability.

A $450,000 loan assessed as principal and interest over 30 years at the buffered rate might calculate to a monthly repayment around $3,200. The same loan assessed as interest-only but reverting to principal and interest over the remaining 25-year term after five years will test higher, closer to $3,400 per month. That difference can cost you $40,000 to $60,000 in borrowing capacity depending on your income and existing commitments.

Interest-only makes sense when cash flow is tight or you're planning to use surplus income to pay down non-deductible debt elsewhere. It doesn't make sense just because other investors do it. Run the serviceability both ways before deciding.

Lenders Mortgage Insurance applies at different thresholds for investors

Most lenders charge LMI on investor loans above 80 per cent loan-to-value ratio, though some will go to 90 per cent for borrowers with strong serviceability and clean credit. LMI on a $480,000 loan at 90 per cent LVR can add $15,000 to $18,000 to your upfront costs, and it's not refundable if you refinance a year later.

If your deposit sits just below the 80 per cent threshold, it's worth confirming what the lender includes in their valuation. Some lenders deduct selling costs from the property value when calculating LVR for investment purchases, which can push an 80 per cent deposit scenario over the line into LMI. Others assess it on contract price or valuation, whichever is lower. A property purchased for $520,000 but valued at $500,000 will be assessed on the lower figure.

That five-minute conversation before you finalise your offer can save you $15,000 you didn't need to spend.

Negative gearing changes mean new builds get different treatment from July 2027

From 1 July 2027, losses on established residential properties purchased after 12 May 2026 will be quarantined and only deductible against rental income or residential capital gains. Losses on new builds remain fully deductible against your total income under the current negative gearing rules.

A new build is defined as a property that adds to housing stock and hasn't been previously sold, unless the first owner was the builder and it hasn't been occupied for more than 12 months. If you're comparing an established property and a new build with similar rental returns, the ability to claim the full loss against your salary could be worth $4,000 to $8,000 per year in tax depending on your marginal rate and the size of the loss.

That's not investment advice and it's not tax advice. The legislation isn't law yet. But it is a variable that will affect how lenders assess serviceability on new builds versus established stock once the changes take effect, because your after-tax position changes the amount of income available to service debt. Get advice from a licensed tax specialist before you assume a structure will work the way you think it will.

Your application gets assessed on policy you'll never read

Every lender has a credit policy that sits behind their advertised rates and features. Some won't lend on properties with a lease longer than two years. Others won't lend in certain postcodes, on certain body corporate structures, or on units above a certain floor level. Some will lend to temporary residents on investment properties but not owner-occupied. Some won't touch short-term rental strategies or properties with granny flats.

You won't find that detail on their website, and most loan writers won't know it until the application gets referred. A broker knows which lenders will write the deal before the valuation gets ordered, and that saves you time, valuation fees, and a credit enquiry you didn't need on your file.

In our experience, about 30 per cent of declined applications could have been approved at a different lender with the same financials and the same property. The issue wasn't the borrower. It was lender selection.

Approval doesn't mean settlement if your circumstances change

Formal approval is conditional. If you change jobs, take on new debt, or reduce your income between approval and settlement, the lender can withdraw. Most lenders re-verify employment and run a final credit check within five days of settlement.

We regularly see buyers finance a car or take a personal loan for furniture after their investment loan gets approved, assuming it won't matter because the property loan is already confirmed. The lender picks it up on the final credit check, recalculates serviceability, and the loan fails. Settlement gets delayed or the contract falls over. The seller can keep the deposit if settlement doesn't occur because the buyer can't fund.

Once you have formal approval, your financial position is locked until settlement occurs. That includes credit card applications, buy-now-pay-later accounts, and anything else that shows up on your credit file. If something has to change, talk to your broker first.

Call one of our team or book an appointment at a time that works for you. We'll tell you what the application looks like before it goes in, which lender will actually write it, and what you need to tidy up before we lodge.

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