Simple hacks to lock in fixed investment loan rates

Fixed rate investment loans protect rental income from rate volatility

A fixed rate investment loan locks your interest rate for a set period, typically between one and five years, so your repayments stay the same regardless of what variable rates do. For Black Rock investors holding properties near the beach or in the boulevards around Bluff Road, where rental demand stays strong but rental income is fixed by lease, this certainty lets you budget with confidence and preserve cash flow for other portfolio goals.

Consider a buyer who purchased a two-bedroom apartment in one of the modernised blocks along Beach Road. Rental income sits around $580 per week on a 12-month lease. With a fixed rate, the investor knows exactly what the loan will cost each month, making it possible to plan for property number two or a renovation without worrying that a rate rise will eat into the margin.

How fixed investment rates compare with variable options right now

Fixed rates on investment loans currently sit higher than many variable rates, so the upfront cost is often more. Variable rates give you access to offset accounts and unlimited extra repayments, which can reduce interest over time if you have surplus cash. Fixed rates remove that flexibility but shield you from increases.

The choice depends on your risk appetite and portfolio stage. If you are expanding your holdings and want predictable repayments while you focus on the next purchase, a fixed rate may suit. If you have irregular income or expect cash windfalls that you want to throw at the loan, variable or a split structure may serve you better. Investment loans through Aviser Finance give you access to products from banks and lenders across Australia, so you can compare both structures side by side.

Interest-only fixed terms reduce holding costs during the growth phase

Interest-only investment loans let you pay only the interest portion of the loan for an agreed period, usually up to five years, which lowers your monthly repayment and maximises cash flow. When you combine interest-only with a fixed rate, you get both lower repayments and rate certainty.

In our experience, Black Rock investors often use this structure when buying their second or third property, particularly if rental income is strong but they want to keep cash available for deposits on additional purchases. The property itself continues to build equity through capital growth and some loan reduction once the interest-only period ends, but in the meantime you are not tying up surplus income in principal repayments.

One scenario we regularly see involves an investor who owns a townhouse near Royal Avenue and wants to add a unit in Mentone to the portfolio. By fixing the Black Rock loan on an interest-only basis, the monthly cost drops enough to service both properties comfortably, even with Lenders Mortgage Insurance factoring into the second purchase.

What happens when your fixed rate term ends

When your fixed period expires, the loan automatically moves to the lender's standard variable rate unless you request a new fixed term or refinance to another product. The variable rate at that point may be higher or lower than your original fixed rate, depending on market conditions.

Some lenders let you lock in a new fixed rate up to 90 days before expiry, which means you can secure a new rate early if you expect increases. Others require you to wait until the fixed term ends. Either way, the time to review your options is at least three months out, not the week before expiry.

If you have been on a fixed rate for three or four years, your original loan balance will have reduced only slightly if you were paying interest-only, or moderately if you were on principal and interest. That remaining balance is what gets refinanced or re-fixed.

Break costs can apply if you exit a fixed rate early

If you repay, refinance or sell during a fixed rate term, the lender may charge a break cost to recover the difference between the rate you locked in and the current wholesale cost of funds. The cost depends on how much time is left on your fixed term, how much rates have moved, and the size of your loan.

Break costs can run into thousands of dollars if rates have fallen since you fixed, but they can also be zero or even a rebate if rates have risen. Most lenders will calculate the figure for you before you commit to exiting, so you know the cost upfront.

For Black Rock investors, this matters if you are planning to sell or release equity to fund another purchase mid-term. In those cases, a variable rate or a split loan may give you the flexibility you need without penalty.

How a split loan combines stability with flexibility

A split loan divides your borrowing into two portions: one fixed, one variable. You might fix 60 per cent of the loan to lock in most of your repayments and leave 40 per cent variable so you can make extra repayments or use an offset account on that portion.

This structure suits investors who want some protection from rate rises but do not want to lose all flexibility. The variable portion still gives you access to features like redraws and offsets, while the fixed portion gives you a floor on repayment certainty.

The mix is up to you. Some investors fix half, others fix more. The proportions can also change each time you refinance or renew a fixed term, so the structure grows with your portfolio.

Why loan structure matters as much as the rate itself

The interest rate gets the attention, but loan features often determine whether a product works for your portfolio over time. Offset accounts, redraw facilities, extra repayment limits, and portability all affect how you can use the loan as your circumstances change.

Fixed rate investment loans generally do not include offset accounts, and extra repayments are usually capped at around $10,000 to $30,000 per year depending on the lender. If you breach the cap, you may face penalty interest or an early repayment fee. Variable loans give you unlimited extra repayments and full offset functionality, which can save significant interest if you hold surplus cash.

For investors focused on expanding your property portfolio, the ability to redraw or offset can mean the difference between buying again in 18 months or waiting three years. Loan structure should match your income pattern, your timeline for the next purchase, and how you manage cash across your portfolio.

Tax treatment stays the same regardless of rate type

Whether you fix or stay variable, the interest you pay on an investment loan remains tax-deductible as long as the property is rented or genuinely available for rent. The rate type does not change your deduction.

For properties purchased after 7:30pm AEST on 12 May, losses from established dwellings will only be deductible against other residential property income from the 2027-28 income year onward. Losses from new builds remain fully deductible. Properties held at that date are grandfathered under the previous rules. These changes do not alter the deductibility of interest itself, but they do affect how losses are treated across your tax return.

All other holding costs, including rates, insurance, property management, repairs and depreciation, remain deductible under existing ATO rules. Fixed and variable loans are treated identically for tax purposes.

How to decide which rate type suits your investment strategy

Start by working out your cash flow tolerance. If rental income is tight and you cannot absorb a rate rise without stress, fixing gives you breathing room. If you have surplus income or expect bonuses, commissions or other windfalls, variable lets you pay down the loan faster.

Next, consider your timeline. If you are planning to sell or refinance within two years, a fixed rate may lock you into break costs. If you are holding long term and want certainty, fixing makes sense.

Finally, think about your portfolio stage. Investors buying your first investment property often prefer variable for flexibility. Investors holding multiple properties may fix one and leave others variable to balance risk across the portfolio.

Call one of our team or book an appointment at a time that works for you

If you are weighing fixed versus variable for your Black Rock investment property, or if your fixed term is ending soon and you want to lock in a new rate, our team at Aviser Finance can walk you through your options and structure a loan that fits your portfolio goals. Call us directly or book an appointment at a time that works for you.

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