Avoid These 5 Investment Loan Feature Mistakes

What Makes an Investment Loan Different From an Owner-Occupier Loan?

Investment loans are assessed differently by lenders and attract higher risk weights under banking regulations, which typically means slightly higher interest rates than owner-occupier products. The loan features you choose also determine how much rental income you retain, how much tax you pay, and whether you can access equity without refinancing.

Consider a Brisbane investor purchasing a rental property in Paddington. They borrow at a variable rate with an offset account attached, thinking it will work the same way it does on their owner-occupied loan. But every dollar sitting in that offset account reduces the deductible interest they can claim against rental income. Over a year, that mistake can cost several thousand dollars in lost tax deductions. The same investor might have been better off with a standalone investment loan and a separate savings account, or a redraw facility they rarely touch.

Interest-Only Repayments: When They Work and When They Don't

Interest-only repayments let you pay only the interest component of the loan for a set period, typically one to five years, which lowers your monthly outgoings and maximises your tax-deductible interest. Once the interest-only period ends, the loan reverts to principal and interest repayments, which increase substantially because the remaining loan term is shorter.

Interest-only structures suit investors who want to hold multiple properties or who expect capital growth to outpace the benefit of paying down the principal. They also suit borrowers who need to keep repayments low in the early years of ownership, particularly if the property has a higher vacancy rate or lower rental yield. At current variable rates, an interest-only loan of $500,000 might cost around $2,100 per month in repayments, compared to roughly $3,200 per month on a principal and interest loan at the same rate over 30 years. That difference can be reinvested, used to service other debt, or kept as a buffer against vacancies.

But interest-only loans classified as non-standard under banking regulations, such as those with interest-only periods longer than five years and an LVR above 80 per cent, attract higher capital charges for lenders and may be harder to access or more expensive. If you are planning to hold the property long-term and have no immediate plans to expand your portfolio, paying down the principal from the start can reduce your total interest cost and build equity faster.

Offset Accounts vs Redraw: Which One Protects Your Deductions?

An offset account is a transaction account linked to your loan. The balance in the offset reduces the interest charged on the loan without reducing the loan balance itself. A redraw facility lets you make extra repayments on the loan and withdraw those funds later, but each extra repayment reduces the loan balance.

For investment loans, offset accounts can create a tax problem. If you park non-investment funds in an offset account linked to an investment loan, you reduce the deductible interest on that loan. The Australian Taxation Office treats the purpose of the borrowing, not the security, as the test for deductibility. If you later redraw those funds for private use, you cannot claim the interest on the redrawn amount as a deduction.

Redraw facilities have a different problem. If you make extra repayments and later redraw for private purposes, the interest on the redrawn portion is not deductible, even though it is still secured by the investment property. Mixing private and investment purposes in the one loan makes it difficult to track what portion of the interest is claimable.

In most cases, investors should keep their investment loan separate and avoid making extra repayments or using offset accounts unless they are holding investment funds only. If you need access to surplus cash, a separate loan or line of credit for private purposes keeps the deductions clean.

Fixed vs Variable: Structuring Around Rate Movements and Flexibility

Fixed rates lock in your repayments for a set period, usually one to five years, which can provide certainty in a rising rate environment. Variable rates move with the market and generally offer more flexibility, including the ability to make extra repayments, access redraw or offset, and refinance without break costs.

Many Brisbane investors split their loan between fixed and variable portions. That structure lets you lock in part of your repayment while keeping access to features like redraw and offset on the variable portion. It also spreads your risk if rates move in either direction. A 50/50 split is common, but the right mix depends on your cash flow, your risk tolerance, and whether you expect to need equity release or refinancing in the short term.

Fixed rate loans generally do not allow extra repayments beyond a small annual cap, and breaking a fixed loan early can trigger significant costs. If you refinance, sell, or pay out a fixed loan before the term ends, the lender may charge you for the difference between the fixed rate you locked in and the current wholesale rate they can achieve on the funds. Those costs can run into tens of thousands of dollars depending on how far rates have moved.

If you are considering a fixed rate on an investment property loan, check the break cost formula in the loan contract and model the cost of an early exit before you commit. If you plan to sell, renovate, or expand your portfolio in the next few years, a variable loan or a smaller fixed portion may be more suitable.

Loan to Value Ratio and How It Affects Your Interest Rate

Lenders mortgage insurance is generally required by lenders on residential loans where the LVR exceeds 80 per cent, and the premium is calculated on a sliding scale based on the loan amount and LVR. For investment loans, LMI premiums are higher than for owner-occupier loans at the same LVR, and the interest rate you are offered also increases as your LVR rises.

If you borrow at an LVR of 90 per cent on an investment property, you will pay LMI and receive a higher interest rate than you would at 80 per cent LVR. The rate differential can be 0.30 to 0.50 percentage points or more, depending on the lender. Over the life of a large loan, that difference adds up.

Some lenders offer discounts to investors who borrow at lower LVRs or who have multiple properties financed with the same institution. If you have equity in another property, using that equity to bring your LVR down on a new purchase can reduce both your upfront LMI cost and your ongoing rate. That strategy is common among investors building a portfolio, but it does increase your overall debt and should be modelled carefully with a broker who understands leveraging equity.

Debt-to-Income Limits and What They Mean for Portfolio Growth

From 1 February 2026, lenders can lend up to 20 per cent of new investor loans to borrowers with a total debt-to-income ratio of six times or greater, measured on a quarterly basis. If your total borrowings across all loans, including investment and owner-occupier debt, exceed six times your gross annual income, you may find it harder to get approval for additional investment lending, even if your rental income is strong.

The limit applies at the lender level, not across the market, so if one lender has reached their quarterly cap, another lender may still have capacity. But it does mean that portfolio growth is now more constrained for highly leveraged investors, and the sequence in which you apply for loans can matter. A broker with access to multiple lenders can help you navigate those caps and find lenders with remaining capacity in their quarterly allocation.

The DTI limit does not apply to existing loans, only to new lending. If you already hold multiple investment properties, your current loans are unaffected, but any new application will be assessed against the limit.

Call One of Our Team or Book an Appointment at a Time That Works for You

Getting the loan structure wrong can cost you in tax, in flexibility, and in missed opportunities to grow your portfolio. If you are buying an investment property in Brisbane or refinancing an existing loan, call one of our team or book an appointment at a time that works for you. We will help you choose the loan features that match your strategy and keep more of your rental income and equity working in your favour.

Frequently Asked Questions