Understanding the basics of Investment Loans

An investment loan gives you the borrowing power to purchase a rental property while keeping your repayment structure and tax position flexible enough to adapt as your circumstances change.

What Makes an Investment Loan Different from a Home Loan

Investment loans are structured around rental income rather than just your personal income, and they offer features that align with tax planning rather than simply paying down debt. Lenders assess your ability to service the loan using projected rent, though they apply a buffer to account for periods when the property sits vacant. Most lenders assume a vacancy rate between 3% and 5% when calculating your borrowing capacity, which means your rental income is discounted before it counts toward serviceability.

Consider a buyer who finds a two-bedroom unit near Carnegie station. The property generates rental income of around $450 per week based on current local listings, but the lender will calculate serviceability using roughly $430 per week to allow for vacancies and potential rental downturns. That rental income is then added to the buyer's salary to determine how much they can borrow. The structure matters because an investment loan is typically interest-only for the first few years, which keeps repayments lower and preserves cashflow for other investments or offset account strategies.

Interest-Only vs Principal and Interest Repayments

Most property investors start with an interest-only period because it reduces repayments and maximises claimable expenses during the early years when cashflow is tightest. Under an interest-only arrangement, you only pay the interest portion of the loan each month, which means your loan balance stays the same but your monthly commitment is lower. After the interest-only period ends, typically between one and five years, the loan reverts to principal and interest unless you request an extension.

In our experience, investors in Carnegie often use interest-only to keep repayments manageable while they save a deposit for their next purchase. The rental income covers most or all of the interest cost, and any shortfall can be offset by the tax deduction on that interest. Once the investor's income rises or they release equity for another property, they often switch to principal and interest to start paying down the debt.

How Negative Gearing Works Under the New Rules

Negative gearing allows you to claim a tax deduction when your rental property costs more to hold than it earns in rent. From 1 July 2027, losses from established residential properties bought after 12 May 2026 can only be offset against rental income or capital gains from residential property, not against your salary or wages. Losses can still be carried forward, so you don't lose the deduction entirely, but the immediate tax benefit changes.

If you bought an established property in Carnegie before Budget night in May 2026, your existing negative gearing arrangements remain intact. If you're buying now and considering an established property, you'll need to model the investment assuming you can't offset the loss against your wage income from mid-2027 onwards. That changes the cashflow equation, particularly in the early years when rental income may not cover interest, body corporate, rates, and maintenance combined.

Choosing Between Variable and Fixed Investment Loan Rates

A variable rate gives you flexibility to make extra repayments, redraw funds, or switch to another lender without penalty, while a fixed rate locks in your interest cost for a set period but limits your ability to adjust the loan. Investors who plan to use an offset account or release equity within a few years typically favour variable rates because fixed loans often restrict those features. Investors who want certainty around their claimable interest deduction and prefer stable repayments may fix part or all of their loan.

Some lenders offer a split structure where you fix a portion of the loan and leave the rest variable. That gives you a baseline repayment you can rely on while keeping enough flexibility to adapt if your income or investment strategy changes. The key question is whether you value access to your equity and offset account features more than protection from rate rises. Neither is objectively superior, it depends on what you're planning to do over the next two to three years.

Using Equity to Fund Your Investment Loan Deposit

If you own your home and it has increased in value, you can borrow against that equity to fund the deposit on an investment property without needing to save cash. Lenders will typically allow you to borrow up to 80% of your home's value without paying Lenders Mortgage Insurance, so if your property is worth more than you owe, the difference can be accessed as a deposit. That equity release is structured as a separate loan or a top-up on your existing home loan, and it's important to keep it quarantined so the interest remains deductible against the investment property.

Consider a scenario where a Carnegie resident owns a home valued at around the local median and has a remaining mortgage balance well below 80% of that value. They refinance to release equity, which gives them a 20% deposit plus costs for a two-bedroom apartment without dipping into personal savings. The interest on the equity release portion is deductible because the borrowed funds are used to purchase an income-producing asset. Structuring this correctly with your mortgage broker in Carnegie means you can claim the maximum deduction while keeping your home loan and investment loan clearly separated for tax purposes.

How Lenders Assess Rental Income and Borrowing Capacity

Lenders calculate your borrowing capacity by adding rental income to your salary, then applying a discount to account for vacancies and a buffer to stress-test your ability to service the loan if rates rise. Most lenders will accept 80% of the projected rental income, meaning a property renting for $500 per week is assessed at $400 per week for serviceability. On top of that, lenders apply an interest rate buffer, usually between 2% and 3% above the actual rate, to ensure you can still afford repayments if rates increase.

Your borrowing capacity is also affected by existing debts, credit card limits, and other investment properties you already own. If you're expanding a portfolio, each additional property reduces how much you can borrow for the next one unless you increase your income or pay down existing debt. That's why many investors focus on building equity and increasing rental income rather than simply accumulating properties. The goal is to structure each loan so it supports the next step rather than limiting it.

Capital Gains Tax Changes and What They Mean for New Investors

From 1 July 2027, the 50% capital gains tax discount will be replaced with indexation based on inflation, and a minimum 30% tax will apply to capital gains. The changes only apply to gains made after 1 July 2027, so any growth in your property's value before that date is unaffected. If you buy a new build, you can choose between the old 50% discount and the new indexed arrangement, whichever works out more favourably when you sell.

For investors buying established property in Carnegie now, the new rules mean you'll pay tax on your real gain after accounting for inflation, but with a 30% floor. In practice, this may result in a similar or slightly higher tax outcome compared to the current 50% discount, depending on how long you hold the property and what inflation does over that period. The main residence exemption is unchanged, so if you later move into the investment property and make it your home, that exemption still applies for the period you live there.

Tax Deductions You Can Claim on an Investment Property

You can claim interest on your investment loan, property management fees, council and water rates, insurance, repairs and maintenance, body corporate fees, and depreciation on the building and fixtures. Interest is usually the largest deduction, particularly in the early years when the loan balance is highest. Ongoing costs like rates, insurance, and strata fees are claimed in the year you pay them, while capital improvements like a new kitchen or bathroom are added to the property's cost base and affect your capital gains tax when you sell.

Depreciation is often overlooked but can deliver significant deductions, particularly on newer properties or recently renovated units. A quantity surveyor prepares a depreciation schedule that itemises the value of the building and fixtures, and you claim that depreciation each year even though you haven't spent any cash. Stamp duty and loan establishment fees are not immediately deductible but are spread over five years or added to your cost base. Keeping your claimable expenses well documented means you can maximise your tax deductions without triggering questions from the Australian Taxation Office.

When Refinancing an Investment Loan Makes Sense

Refinancing becomes worthwhile when you can reduce your interest rate, release equity for another purchase, or switch to a loan structure that suits your current strategy. If your property has increased in value and you've paid down some of the loan, you may be able to refinance and access that equity without needing to sell. Alternatively, if your lender's rate is no longer competitive or the loan features don't match what you're doing now, moving to another lender can save you thousands in interest each year.

We regularly see investors refinance to consolidate debt, extend an interest-only period, or access an offset account they didn't have on the original loan. The key is to weigh the benefit of the new rate or features against the cost of switching, which can include discharge fees, application fees, and valuation costs. If the interest saving over the next two years exceeds the cost of refinancing, the move usually makes sense. If you're planning to sell or pay down the loan within twelve months, it's often worth staying put.

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Important: This does not constitute tax advice and it is recommended to seek advice from your Accountant or Financial Planner for your individual circumstances.