Property Investment Loan Structures That Support Long-Term Growth
An investment loan isn't just finance for a second property.
The structure you choose affects your cashflow, tax position, and capacity to grow your portfolio over time. Interest-only repayments reduce your monthly outgoings and preserve capital for further purchases or renovations, while principal and interest repayments build equity but reduce your deductible expenses. Variable rates give you flexibility to make extra repayments or redraw funds without penalty. Fixed rates lock in your borrowing cost for one to five years, which can protect your serviceability if rates rise but may incur break costs if you need to exit early.
Consider a Queensland investor purchasing a unit in Kangaroo Point. She selects a variable rate interest-only loan with an offset account linked to her salary. Her rental income covers most of the interest cost, and any surplus cash sits in the offset, reducing the interest charged without affecting her tax deductions. When she's ready to purchase a second property, the offset balance becomes her deposit, and her borrowing capacity remains intact because she hasn't been paying down principal on the first loan.
The offset account preserves flexibility without compromising the deductibility of interest. Every dollar in the offset reduces the interest charged on the investment loan, but because the loan balance itself hasn't changed, the full interest amount remains claimable. This approach works well for investors who expect their income to grow or who want to retain the option to deploy capital elsewhere.
Some lenders offer rate discounts for principal and interest loans or for borrowers with multiple properties financed through the same institution. Those discounts can be worth comparing, but they shouldn't override the need for a structure that aligns with your income, tax position, and timeline for portfolio growth.
How Lenders Assess Investment Loan Serviceability
Lenders assess your ability to service an investment loan at a rate at least 3 percentage points above the actual loan rate.
This buffer applies to all new lending and ensures you can manage repayments even if rates rise. Rental income is included in the serviceability calculation, but lenders typically apply a shading factor of 20 per cent to account for vacancy periods, maintenance costs, and potential rental downturns. If the property generates $600 per week in rent, the lender will assess your income as $480 per week from that source.
From February this year, lenders have also been required to limit high debt-to-income lending. No more than 20 per cent of new investor loans at each bank can be made to borrowers with total debt of six times their gross income or more. If your household income is $150,000 and you're seeking to borrow $900,000 or more across all your loans, you may find some lenders decline your application even if you can service the repayments. The limit applies separately to investor and owner-occupier lending, so your existing home loan and your new investment loan are assessed together.
In our experience, borrowers with multiple properties or high loan-to-value ratios are more likely to encounter serviceability constraints than deposit constraints. Running a borrowing capacity assessment before you start searching for property helps you understand how much you can borrow and which lenders are likely to approve your application. You can explore your options using our borrowing capacity tools or by speaking with our team.
Tax Deductions and Negative Gearing for Queensland Investors
Interest on an investment loan is deductible against your rental income and other assessable income, provided the property is rented or genuinely available for rent.
For properties you held at 12 May last year, or for new builds purchased after that date, losses from the property can still be offset against your salary, business income, or other sources. If your rental property costs you $15,000 more per year than it generates in rent, and your marginal tax rate is 37 per cent, the deduction reduces your tax bill by around $5,550, bringing your net holding cost down to $9,450.
From the next financial year, losses on established properties purchased after 12 May last year can only be offset against income from other residential properties, including capital gains when you sell. Losses can be carried forward indefinitely, so they're not lost, but they no longer reduce your tax on salary or business income in the year they occur. This change doesn't affect properties you already own, and it doesn't affect new builds that increase the total number of dwellings on the land.
Other holding costs are also deductible, including council rates, insurance, property management fees, repairs, and depreciation on the building and fixtures. Body corporate fees for units and townhouses are fully deductible. Loan establishment fees and ongoing account-keeping fees are deductible over the life of the loan or over five years, whichever is shorter. Stamp duty and conveyancing costs are not immediately deductible but form part of your cost base when you calculate capital gains tax on disposal.
Maximising your deductions requires separating your investment loan from any personal borrowing. If you refinance your home and take out additional funds to purchase an investment property, the interest on the additional amount is deductible, but the interest on the original home loan is not. Lenders and brokers can structure the loan as two separate splits with separate accounts to maintain that distinction.
Loan-to-Value Ratios and Lenders Mortgage Insurance
Most lenders require you to pay Lenders Mortgage Insurance if your loan exceeds 80 per cent of the property value.
LMI protects the lender, not you, but the premium is paid by you as a one-off cost, either upfront or capitalised into the loan. The premium is calculated on a sliding scale and increases sharply as the LVR rises. On a property valued at the current median for a Queensland regional centre, the LMI premium at 85 per cent LVR might be around $8,000, while at 90 per cent LVR it could exceed $15,000. Some lenders will lend up to 95 per cent for investment property, but the premium at that level can be prohibitive.
If you own your home and have built up equity, you may be able to use that equity as part of your deposit for the investment property, either through a top-up on your existing loan or by offering your home as additional security. This approach, sometimes called cross-collateralisation, can help you avoid LMI, but it also means both properties are secured under the same lending arrangement. If you encounter financial difficulty, both properties are at risk. Many investors prefer to keep their home and investment loans separate, even if it means paying LMI on the investment loan.
LMI premiums are not immediately tax-deductible, but they can be claimed over the life of the loan or over five years, whichever is shorter. Some lenders will allow you to refinance to another lender without requiring a new LMI premium if the original policy is portable or if the new lender accepts the existing policy.
Fixed or Variable Rates for Investment Property
Variable rates allow you to make extra repayments, redraw funds, and exit the loan without penalty.
Fixed rates provide certainty over your interest cost for one to five years, which can help with budgeting and serviceability if you're borrowing close to your limit. Many investors split their loan, fixing a portion to lock in a rate and leaving the remainder on a variable rate for flexibility. A 50-50 split is common, but the right mix depends on your risk tolerance, income stability, and plans for the property.
If you fix your rate and then want to sell the property, refinance to another lender, or pay down the loan faster than the fixed-rate contract allows, you may incur break costs. These are calculated based on the difference between your fixed rate and the lender's cost of funds over the remaining fixed period, and they can run into thousands of dollars if rates have fallen since you fixed. Break costs are less likely if rates have risen, because the lender can redeploy your funds at a higher rate.
Investors who plan to hold the property long-term and who value cashflow certainty often favour fixed rates. Investors who want the flexibility to renovate, subdivide, or sell within a few years tend to choose variable rates or a smaller fixed portion. If you're considering a refinance in the near future, a variable rate or a split structure gives you more options.
Borrowing Capacity and Portfolio Growth
Your borrowing capacity for a second or third investment property depends on your income, existing debts, living expenses, and the rental income from properties you already own.
Lenders assess all your loans together, including your home loan, investment loans, car loans, personal loans, and credit card limits. Even if you pay off your credit card in full each month, the lender will assume you're using the full limit when they calculate your serviceability. Closing unused cards or reducing limits before you apply can increase your borrowing capacity by several thousand dollars.
Rental income is shaded by around 20 per cent, as discussed earlier, and interest on investment loans is assessed at the loan rate plus the serviceability buffer. If you're borrowing close to your limit, a small rate rise or a change in your employment can affect your ability to service the loan. Regular loan health checks help you understand where you stand and whether refinancing or restructuring your loans could improve your position.
As your portfolio grows, some lenders will offer better rates or reduce their serviceability buffer for experienced investors with strong equity positions. Building a relationship with a lender or working with a broker who understands investment lending can open up options that aren't available to first-time investors.
Capital Gains Tax and Property Disposal
When you sell an investment property, you pay capital gains tax on the profit after indexing your cost base for inflation.
From 1 July last year, gains on residential investment property are taxed under a new system that indexes your cost base using CPI and applies a minimum 30 per cent tax rate to the real gain. For properties you owned before that date, gains are split between the old and new rules based on when they accrued. You can choose to obtain a market valuation as at 1 July last year or use the ATO's apportionment formula.
Eligible new builds continue to offer a choice between the old 50 per cent discount and the new indexed system, so investors in new property have more flexibility at the time of sale. The main residence exemption still applies if you live in the property, and small business concessions remain available for qualifying taxpayers.
Capital gains tax is not payable until you sell, so holding property long-term defers the tax and allows you to choose the timing of disposal based on your income and tax position in that year. If you're planning to sell, speak with a tax adviser before you sign a contract, as the timing of settlement can affect which financial year the gain is assessed in.
Property investment is about building wealth over time, and the right loan structure, tax strategy, and lender relationship all contribute to that outcome. The decisions you make at the start set the foundation for everything that follows. Call one of our team or book an appointment at a time that works for you, and we'll walk you through the options that fit your goals and circumstances.
Frequently Asked Questions
Can I still negatively gear an investment property I buy now?
Yes, but it depends on when you buy and what you buy. Properties held at 12 May last year and new builds purchased after that date allow full negative gearing against all income. Established properties purchased after 12 May last year can only offset losses against other residential property income from the next financial year.
How do lenders calculate rental income for serviceability?
Lenders typically apply a 20 per cent shading factor to rental income to account for vacancies and maintenance costs. If your property generates $600 per week in rent, the lender will assess your income as $480 per week from that source.
Do I have to pay Lenders Mortgage Insurance on an investment loan?
LMI is generally required if your loan exceeds 80 per cent of the property value. The premium increases as your LVR rises and can be paid upfront or added to the loan. Using equity from your home as part of your deposit may help you avoid LMI.
Should I choose a fixed or variable rate for my investment loan?
Variable rates offer flexibility to make extra repayments and exit without penalty. Fixed rates provide certainty over your interest cost but may incur break costs if you sell or refinance early. Many investors split their loan to get both benefits.
What happens to capital gains tax when I sell an investment property?
From 1 July last year, gains are taxed using cost base indexation and a 30 per cent minimum rate on real gains. For properties owned before that date, gains are split between the old and new rules. Eligible new builds offer a choice between the old discount and the new indexed system.
