Avoid These Investment Loan Approval Mistakes

Investment Loan Serviceability Isn't Calculated Like Your Home Loan

Banks assess your ability to repay an investment loan differently to an owner-occupier mortgage, and that difference knocks out more applications than any other single factor.

When you apply for an investment loan, the lender calculates serviceability by stress-testing the loan at a rate 3.0 percentage points above the actual product rate. That buffer has been in place since late 2021 and applies to every new borrower. On top of that, most lenders will only count 80 per cent of the expected rental income when assessing your capacity. Some go lower. If your property sits vacant between tenants, you still need to service the full loan amount from your other income. Lenders also factor in a vacancy rate assumption, which varies by postcode but typically sits around 4 to 5 per cent annually. In practice, this means your salary, business income, or other rental income needs to comfortably cover the loan repayments at the stressed rate, with only partial credit for the rent you'll collect.

Consider a buyer who earns $95,000 per year and wants to borrow $650,000 to purchase an investment property near Kogarah that would rent for $650 per week. At current variable rates, the lender assesses serviceability at roughly 3 percentage points higher and only credits $520 per week in rental income. After accounting for existing living expenses and other debt commitments, the borrower might find their application declined even though the rental income would cover the actual loan repayments several times over. The solution involved reducing the loan amount by $80,000 through a larger deposit and bringing in a spouse as a co-applicant to add their income to the assessment. The loan was approved at $570,000 with a co-borrower structure.

Debt-to-Income Limits Apply Separately to Investor Borrowing

From February this year, banks must cap the proportion of new investment loans they write to borrowers with a total debt-to-income ratio of six times or more at 20 per cent of their investor lending each quarter.

The limit applies separately to investor loans and owner-occupier loans. If you already own your home and you're applying for an investment loan, the bank adds up all your debts, including your existing home loan, the new investment loan, credit cards, car loans, and any other borrowing, then divides that total by your gross annual household income. If the result is six or higher, your application falls into the restricted bucket. Banks still lend above six times income, but they ration those approvals carefully. In our experience, applicants with a DTI above six are more likely to face requests for larger deposits, evidence of genuine savings, or co-borrowers to bring the ratio down. Some lenders have tightened their own internal DTI policies below the regulatory cap to avoid hitting the limit mid-quarter.

If your household income is $140,000 and you're carrying $900,000 in total debt after adding the proposed investment loan, your DTI sits at 6.4 times. That puts you in the restricted category. You might still be approved, but you're competing for a smaller pool of available credit, and the lender will scrutinise your application more closely than they would for a borrower at 5.5 times income.

Rental Income Needs Documentation Before Settlement

Lenders want to see evidence that the rental income you've declared in your application is realistic, and they want that evidence before they release funds.

Most banks require a signed lease agreement or a rental appraisal from a licensed property manager before settlement. A rental appraisal needs to be current, typically no older than 90 days, and it must come from an agent operating in the local area. If you're buying an investment property in Rockdale or Carlton, an appraisal from an agent based in Parramatta won't carry the same weight. Some lenders will accept an appraisal at the application stage and allow you to provide the lease closer to settlement, but others want both upfront. If the appraisal comes in lower than the rent figure you used in your application, the lender recalculates serviceability with the lower number, and that can be enough to tip a marginal application into decline.

We regularly see this with off-the-plan purchases where the buyer applied for finance 12 months before completion. The rental appraisal provided at application becomes stale, and the lender requests a new one closer to settlement. If the local rental market has softened in the meantime, the updated appraisal might show a $50 or $100 per week reduction, and serviceability no longer stacks up. The buyer either needs to increase their deposit to reduce the loan amount or find additional income to support the application.

Interest-Only Loans Are Harder to Get Approved Than Principal-and-Interest

Interest-only investment loans reduce your monthly repayments during the interest-only period, but they make your application harder to approve.

Banks assess interest-only applications more conservatively because the loan balance doesn't reduce during the interest-only term, which increases their risk. Under the prudential framework, interest-only loans attract higher risk weights than principal-and-interest loans at the same loan-to-value ratio, and that flows through to pricing and approval appetite. Most lenders cap interest-only terms at five years for loans above 80 per cent LVR and require the borrower to demonstrate they can service the loan on a principal-and-interest basis after the interest-only period ends. Some lenders won't offer interest-only above 90 per cent LVR at all, even with lenders mortgage insurance. If your application is marginal on serviceability, switching to principal-and-interest repayments might be the difference between approval and decline. The repayments are higher, but the serviceability test is less punishing, and you're not locked into that structure forever. You can often switch to interest-only down the track once you've built equity or your income has increased.

Lenders Mortgage Insurance Doesn't Mean Automatic Approval Above 80 Per Cent LVR

Lenders mortgage insurance protects the bank, not you, and paying the premium doesn't guarantee your loan will be approved.

LMI is required on most investment loans above 80 per cent LVR, and the premium increases sharply as the LVR climbs. At 85 per cent LVR, you might pay $8,000 to $12,000 in LMI on a $600,000 loan. At 90 per cent, that figure can double. The premium is calculated based on the loan amount and the LVR, and it's usually capitalised into the loan rather than paid upfront. But even with LMI in place, the lender still needs to be satisfied that you can service the loan. LMI shifts the risk of default losses away from the bank, but it doesn't change the serviceability assessment or remove the debt-to-income restrictions. We regularly see investors assume that because they're willing to pay LMI, the bank will approve a 90 per cent LVR investment loan. That's not how it works. The lender still applies the same serviceability buffer, the same rental income shading, and the same DTI limits. LMI just allows them to lend above 80 per cent LVR to borrowers who meet those criteria.

If you're borrowing at 90 per cent LVR, expect the lender to ask for evidence of genuine savings, a clear explanation of how you'll cover the deposit and stamp duty, and a strong serviceability position. If your DTI is above six or your rental income is marginal, the application will likely be declined regardless of LMI.

Capital Gains Tax Changes Affect Investment Property Purchased After May Last Year

If you purchased an established investment property after 12 May last year, you need to understand how the negative gearing and capital gains tax changes will affect your tax position from the 2027-28 income year.

Under legislation that passed in June, rental property losses on established dwellings purchased after that date can only be offset against income from other residential properties, including capital gains on residential property sales. You can no longer offset those losses against your salary or business income. Losses can be carried forward to future years and used against residential property income later, but the immediate tax benefit most investors rely on to manage cash flow has been removed for properties bought after the cut-off. New builds are exempt. If you bought a property constructed on previously vacant land, or a development that increased the total number of dwellings on the site, you can still claim losses against all income. Knock-down rebuilds that don't increase dwelling numbers aren't counted as new builds.

From July next year, the 50 per cent CGT discount for individuals on investment properties will be replaced by cost base indexation and a 30 per cent minimum tax rate on real gains. If you sell an investment property after 1 July next year, gains that accrued before that date are taxed under the old 50 per cent discount rules, and gains after that date are indexed to inflation and taxed at a minimum 30 per cent rate. For eligible new builds, you get to choose between the old discount method and the new indexed method when you sell. These changes don't affect your loan approval directly, but they do affect the long-term return on your investment and your ability to manage holding costs during periods of vacancy or low rental yield. If you're buying an established property as an investment, your tax deductions will be less valuable from next financial year, and that reduces the after-tax return on the property. Lenders don't adjust their serviceability assessment to account for this, so you need to factor it into your own affordability calculations before you apply.

Your Existing Debt Gets Assessed at the Limit, Not the Balance

When a lender calculates your serviceability for an investment loan, they don't use the current balance on your credit cards or the minimum repayment you've been making.

They assess your credit card debt as if you're using the full limit every month and repaying it at a standard rate, usually around 3 to 4 per cent of the limit. If you have a credit card with a $20,000 limit and a zero balance, the lender still factors in a monthly repayment of $600 to $800 when assessing your capacity to service the investment loan. The same treatment applies to other revolving credit facilities like personal overdrafts and some lines of credit. This catches a lot of investors off guard. You might have three credit cards with a combined limit of $45,000 that you rarely use, but the lender treats them as if you're making $1,350 to $1,800 in monthly repayments. That phantom debt can reduce your borrowing capacity by $150,000 to $200,000 or more, depending on your income and the lender's serviceability model.

If your application is tight on serviceability, close or reduce any credit facilities you're not actively using before you apply. Most lenders require written confirmation from the card issuer that the account has been closed, so allow a few weeks for that process. Reducing a $30,000 combined credit limit to $5,000 can add $80,000 to $100,000 back into your borrowing capacity, and that's often enough to get an investment loan over the line.

The Property Type and Location Affect How Much You Can Borrow

Not all properties are treated equally by lenders, and the type of dwelling you're buying can determine whether your application is approved at all.

Banks apply postcode-based lending restrictions, LVR caps, and in some cases outright exclusions based on property type and location. Studio apartments, serviced apartments, properties with lease-back arrangements, and dwellings in oversupplied postcodes are commonly restricted. In Kogarah and surrounding suburbs, standard two-bedroom units and freestanding houses are generally well-received by lenders, but high-rise developments with a large proportion of investor ownership or buildings with defect issues can trigger lower maximum LVRs or declines. Some lenders cap investment loans on apartments above a certain floor level or in buildings with more than a set number of storeys. Others won't lend on properties in buildings where a single entity owns more than 20 per cent of the units.

If you're considering a property in a postcode or building type that's on a lender's restricted list, your broker can help you identify which lenders will still consider the property and at what LVR. In some cases, you'll be capped at 70 or 75 per cent LVR even if your serviceability would support 90 per cent. That means you need a larger deposit, or you need to look at a different property. Running these checks before you make an offer can save you from signing a contract on a property you can't finance.

Banks don't always share your enthusiasm for a renovator's delight or a deceased estate with potential. A property in poor condition might be valued by the lender at 10 to 20 per cent below the purchase price, which immediately blows out your effective LVR and can kill the application. If your borrowing capacity is already stretched, a property that needs work is probably not the right purchase for your first or second investment.

Call one of our team or book an appointment at a time that works for you. We'll assess your full financial position, identify which lenders are most likely to approve your investment loan, and help you structure the application correctly from the start. Speak to a mortgage broker who works for you, not the banks.

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