Investment Loans: Avoid These Fixed vs Variable Mistakes

You need to decide whether to fix your investment loan rate, leave it variable, or split it between both.

The decision affects how much you pay each month, how flexible you can be with repayments, and what happens if you want to refinance or sell before the fixed term ends. Most primary teachers choosing an investment loan for the first time assume they should replicate whatever structure they used on their home loan. That approach overlooks the fact that investment properties serve a different purpose and often benefit from different loan features.

Fixed Rate Investment Loans Lock In Certainty But Remove Flexibility

A fixed rate investment loan holds your interest rate steady for a set period, usually between one and five years. You know exactly what your repayments will be during that time, regardless of whether the Reserve Bank moves the cash rate up or down.

Consider a primary teacher who purchases a two-bedroom unit as their first investment property. They fix the entire loan for three years at the rate available when they settle. If variable rates rise during that period, they benefit from the lower locked-in rate. If variable rates fall, they remain locked in and cannot access the lower rate without breaking the fixed term and paying a break cost.

Fixed rate loans typically come with restrictions. Most lenders limit additional repayments to between $10,000 and $30,000 per year without penalty. If you want to pay down the loan faster using a tax refund or salary increase, you may be charged for exceeding that limit. Refinancing during the fixed period usually triggers break costs, which can run into thousands of dollars depending on how far rates have moved since you locked in. Selling the property before the fixed term ends can also trigger those same costs, though some lenders may waive them if the buyer assumes your loan.

Variable Rate Investment Loans Offer Full Flexibility With Rate Risk

A variable rate investment loan adjusts whenever your lender changes their standard investor variable rate. You take on the risk that rates may rise, but you also benefit immediately if they fall.

Variable rate products allow unlimited additional repayments without penalty. You can pay off as much as you want, whenever you want, provided the loan permits it. Most variable rate investment property loans also include a redraw facility or offset account, which lets you access any extra funds you have paid in. If you are managing cash flow between rental income, your teaching salary and occasional vacancy periods, that flexibility can matter.

Refinancing a variable rate loan does not attract break costs. If you find a lender offering a lower rate or better loan features, you can switch without penalty beyond standard discharge and application fees. That freedom becomes relevant if your circumstances change or if you want to consolidate multiple investment loans as your portfolio grows.

The downside is uncertainty. Variable rates can move at any time, and repayments can increase without warning. Budgeting becomes harder when your monthly cost is not fixed, particularly if you are relying on rental income to cover most of the loan.

Split Loans Combine Both Rate Types To Balance Risk and Access

A split loan divides your borrowing into two portions, one fixed and one variable. You nominate the split, commonly 50/50, though it can be any ratio that suits your situation.

In our experience, primary teachers with investment properties often split their loan to stabilise part of the repayment while keeping enough flexibility to make additional payments or access funds if needed. The fixed portion provides a floor on repayments, while the variable portion allows you to pay down debt faster or redraw if an urgent cost arises.

As an example, a teacher borrowing for an investment property might fix 60 per cent of the loan for three years and leave 40 per cent variable. If they receive a $15,000 tax refund, they can put it all toward the variable portion without penalty. If rental income increases or they gain a promotion, they can direct that extra cash flow toward the variable portion and reduce the principal faster. At the same time, the majority of their repayments remain predictable.

Split loans do create some administrative complexity. You receive two loan accounts, each with its own balance, rate and features. If you want to refinance later, you need to consider both portions separately, particularly if the fixed portion is still within its locked period. Some lenders charge two sets of fees for a split structure, though many do not.

Interest Only Versus Principal and Interest Repayments Change the Cash Flow Equation

Whether you choose fixed, variable or split, you also need to decide whether to make interest only or principal and interest repayments. Most lenders allow interest only periods of up to five years on investment loans, after which the loan reverts to principal and interest.

Interest only repayments reduce your monthly cost because you are only covering the interest charge, not paying down the loan balance. That lower repayment can improve cash flow, particularly if rental income does not cover the full loan cost and you are relying on your teaching salary to make up the shortfall. The interest you pay remains tax deductible under current rules for properties purchased before recent legislative changes.

The trade-off is that you do not reduce the debt. At the end of the interest only period, the loan balance is the same as when you started, and your repayments increase when the loan switches to principal and interest. If you plan to hold the property long term and rely on capital growth rather than debt reduction to build equity, interest only can be a useful tool. If you prefer to pay the loan down and own the property outright sooner, principal and interest repayments are more appropriate.

Which Structure Fits Your Investment Strategy

Your choice depends on what you are trying to achieve with the property and how you manage risk. If you want certainty and are comfortable locking in a rate for a set period, a fixed rate loan works. If you value flexibility and want the option to pay down debt quickly or refinance without penalty, a variable rate loan is more suitable. If you want elements of both, a split loan delivers that balance.

Interest only repayments suit investors focused on cash flow and tax efficiency in the short term, while principal and interest repayments suit those focused on debt reduction and long-term ownership. None of these structures are inherently superior. They serve different purposes depending on your financial position, your property goals and how much volatility you can tolerate in your repayments.

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