Top tips to get investment loan pre-approval sorted

Pre-approval tells you what you can borrow before you start shopping for an investment property.

For police officers working shifts, getting that number confirmed ahead of time means you can move on a rental property the moment it comes up, without chasing paperwork mid-roster or losing the listing to someone who already knows their limit. Pre-approval also gives you a buffer period to sort your deposit, clarify your borrowing capacity, and check whether your lender will let you hold interest-only repayments or release equity from your home to fund the purchase.

Why pre-approval matters when you're buying to rent out

A pre-approval commits a lender to an amount and a rate type for up to 90 days, sometimes longer. If you find a property in that window, you move straight to formal approval without re-proving your income or starting the application from scratch.

Lenders apply a stricter serviceability test to investment loans than owner-occupier loans. They add a serviceability buffer of 3.0 percentage points above the quoted rate and assess your ability to cover the loan even if the property sits vacant for several weeks. They also assume rental income will cover only 80 per cent of the lease amount, not the full rent. That means your take-home pay needs to cover the shortfall, every repayment, on time. If you wait until after you've signed a contract to discover your income falls short, you risk losing your deposit.

Consider a senior constable earning overtime who found a unit priced at the median. Rental appraisals suggested the property would lease for enough to cover most of the repayment. The lender shaded the rental income by 20 per cent, applied the serviceability buffer, and confirmed the officer could service the loan using base salary alone, with overtime excluded. The pre-approval was issued within five days. When the officer found another unit two suburbs over three weeks later, the formal approval took eight days because all the income evidence was already on file.

How lenders calculate your borrowing power for rental property

Lenders multiply your after-tax income by a serviceability ratio, subtract your existing commitments, and stress-test the result at a rate 3.0 percentage points above the loan product rate. For investment lending, they add the shaded rental income to your salary, then subtract the proposed loan repayment, your current mortgage or rent, any car finance, credit card limits, and an allowance for living expenses.

Debt-to-income limits also apply. From 1 February 2026, lenders can write only 20 per cent of new investor loans each quarter to borrowers whose total debt sits at six times annual income or higher. If your pre-approval pushes you over that threshold, the lender may decline or delay the application until the next quarter, even if you meet every other test. That makes it important to know your DTI ratio before you apply, not after.

Rental income is the other variable. Lenders use a professional rental appraisal or an online estimate from a major portal, then apply an 80 per cent shading. A property appraised at $600 per week contributes $480 per week, or roughly $24,960 per year, to your serviceability. If the rent is higher in the appraisal but the lender's postcode data shows a higher vacancy rate, they may apply additional discounting. Some lenders will not include any rental income at all until you provide a signed lease.

What you need to provide with your application

You will need payslips covering the most recent 30 to 60 days, tax returns for the past two years if you claim overtime or allowances, and statements for every bank account, credit card, and loan you hold. Lenders want to see your deposit sitting in your account for at least 90 days, so if you've just moved cash from offset or received a gift, be ready to explain the source.

If you are using equity release from your home to fund the deposit and costs, the lender will order a valuation on your current property and calculate how much you can borrow against it without breaching the maximum loan-to-value ratio. Most lenders cap combined lending at 90 per cent for investment purchases without lenders mortgage insurance.

You also need a shortlist of property types and postcodes. Lenders price loans differently depending on location and dwelling type. A unit in a postcode with high rental vacancy or a building with more than 50 per cent non-owner-occupied lots may attract a higher rate or lower maximum LVR, which reduces your borrowing power. Naming a specific suburb or two in your application lets the lender flag those issues during pre-approval rather than at formal approval when you are already under contract.

Interest-only versus principal-and-interest for pre-approval

Interest-only repayments are lower each month, which improves your serviceability and lets you borrow more. Lenders typically allow interest-only terms of up to five years on investment loans, after which the loan reverts to principal-and-interest and the repayment jumps.

For officers looking to hold multiple properties or preserve cash flow during parental leave or unpaid training, interest-only loans can make the numbers work when principal-and-interest does not. But lenders still assess your ability to service the loan on a principal-and-interest basis, even if you choose interest-only repayments. That means the approval amount may be lower than you expect, especially if you are already carrying a mortgage on your home.

Some lenders also classify long-term interest-only loans with an LVR above 80 per cent and an interest-only period longer than five years as non-standard under the prudential rules. Non-standard loans attract higher capital charges for the lender, which flows through to higher rates and tighter policy. If you want interest-only and a high LVR, your options narrow.

What happens once you find a property

Once you have a signed contract, you give the lender the contract of sale and they order a valuation. If the valuation comes in at or above the purchase price and nothing has changed in your financial position since pre-approval, formal approval usually takes one to two weeks.

If the valuation falls short, the lender recalculates the LVR using the lower figure. You either need to increase your deposit to keep the LVR within the approved range, or accept a reduced loan amount. If you cannot cover the gap, you may need to renegotiate the purchase price or walk away, depending on the terms of your contract and the cooling-off rules in your state. That is one reason to build a small buffer into your deposit or borrow slightly less than your pre-approved maximum.

If your circumstances have changed since pre-approval, such as a new car loan, a drop in rostered hours, or a period of unpaid leave, the lender reassesses your serviceability. Pre-approval is conditional on your financial position staying the same, so any new debt or reduction in income can reduce the approved amount or void the pre-approval altogether.

Fixed, variable, or split for rental property loans

You can lock part or all of your rate at pre-approval stage, though most officers leave the choice until formal approval when they have a settlement date. Fixed rates give you certainty for one to five years but usually come with restrictions on extra repayments and no offset account. Variable rates cost more when the cash rate rises, but they let you use offset and make unlimited additional repayments, which is useful if you want to pay down the loan or refinance early.

Some officers split the loan, fixing half and leaving half variable. That gives partial protection against rate rises while keeping flexibility on the variable portion. If you do choose a fixed rate and need to break the loan before the fixed term ends, the lender will charge you break costs, which can run into thousands of dollars depending on how far rates have moved since you fixed.

Using your pre-approval while working shifts

Pre-approval is valid for 60 to 120 days depending on the lender. If you are rostered on nights or interstate for training during that window, you can still attend auctions, make offers, and sign contracts. Once you have a property under contract, your broker can manage most of the formal approval process without you needing to take leave.

If your pre-approval is about to expire and you have not found a property yet, you can usually extend it by providing updated payslips and bank statements. Some lenders will extend once without a full re-assessment, others require a new application. Either way, it takes less time than starting from zero.

Call one of our team or book an appointment at a time that works for you. We handle the paperwork, deal with the lender, and make sure your investment loan pre-approval is ready before you start looking.

Frequently Asked Questions