The Easiest Way to Lock in Investment Loan Rates

Fixed rate terms on investment loans give you rate certainty for a set period.

That certainty can protect your cash flow if you're relying on rental income to service the loan, or if you're negatively gearing and want to forecast your tax position accurately. The term you choose depends on how long you want that protection, what you're prepared to give up in flexibility, and where you think rates are heading.

How Fixed Rate Terms Are Structured

A fixed rate locks in your interest rate for one, two, three or five years. During that period, your repayments stay the same regardless of what happens to the Reserve Bank cash rate or the broader market. Once the fixed term ends, the loan typically reverts to the lender's variable rate unless you refinance or lock in another fixed term.

Consider a buyer who secures a three-year fixed rate on an investment property near Were Street Reserve. They're holding the property interest-only and negatively gearing. The fixed rate means they can calculate their annual interest deduction with precision and forecast their after-tax cost for the next three years. When the term expires, they can assess whether to refinance, switch to variable, or fix again based on market conditions at that time.

One Year Fixed: When Short Protection Makes Sense

A one-year fixed rate suits investors who want temporary rate protection without a long commitment. It's often used when rates are expected to fall within twelve months, or when you're planning to sell or refinance soon and want to avoid break costs.

The trade-off is limited certainty. You'll be back in the market within a year, and if rates have risen, you're exposed. We regularly see this term chosen by investors who've purchased off-the-plan in Hampton East and expect settlement within the next twelve to eighteen months on a second property. They fix for one year to hold their current loan steady while they prepare for the next purchase.

Three and Five Year Terms: Longer Certainty, Higher Constraints

Three and five-year fixed terms deliver extended protection but come with stricter conditions. Most lenders cap extra repayments at $10,000 to $30,000 per year on a fixed investment loan, and some prohibit offset accounts entirely. If you're planning to use equity release from another property to fund renovations or a second purchase, a long fixed term can block access unless you're prepared to pay break costs.

In our experience, five-year fixed terms are rarely suitable for active investors. Three years can work if you're confident you won't need to access equity or make large lump sum payments during that period. For investors in Hampton East holding a single property and prioritising stable repayments over flexibility, a three-year term can provide useful certainty, particularly if you're managing a variable income or contractor work.

What Happens When Your Fixed Term Ends

When a fixed term expires, your loan reverts to the lender's standard variable rate unless you act. That reversion rate is often higher than the discounted variable rate offered to new customers, which means your repayments can jump noticeably.

Most lenders allow you to lock in a new fixed rate up to 90 days before expiry. If you don't, and the loan rolls to variable, you can still switch back to fixed or refinance, but you'll be subject to whatever rates are available at that time. This is one reason many investors set a calendar reminder three months before their fixed term ends. If you're approaching fixed rate expiry, it's worth reviewing your options early rather than letting the loan roll automatically.

Fixed Versus Variable for Investment Property Strategy

Fixed rates lock in certainty but limit flexibility. Variable rates allow unlimited extra repayments, full offset account access, and penalty-free refinancing, but your repayments move with the market. For investors building a portfolio, splitting the loan between fixed and variable can balance both.

A split structure might look like 50 per cent fixed for three years and 50 per cent variable. The fixed portion protects half your repayments, while the variable portion lets you make extra repayments, access an offset, and refinance without break costs if you need to leverage equity for another purchase. Some lenders allow multiple splits, which can give you even more control, though it adds complexity.

DTI Caps and How They Affect Fixed Rate Choices

The debt-to-income cap that came into effect in February this year limits how much you can borrow relative to your income. Lenders can only write 20 per cent of new investor loans at a DTI of six times or greater. If you're close to that threshold, locking in a fixed rate can make your borrowing capacity easier to forecast, because your repayments won't change mid-application if variable rates rise.

That certainty matters if you're planning a second investment loan within the next twelve to eighteen months. A fixed rate on your existing loan means your serviceability won't shift unexpectedly while you're preparing the next application. It also means lenders can assess your position with more confidence, which can be helpful if you're already stretched on DTI.

Break Costs and Why They Matter for Investors

If you repay a fixed rate loan early, sell the property, or refinance before the term ends, most lenders charge a break cost. The cost is calculated based on the difference between your fixed rate and the lender's current wholesale funding cost for the remaining term. If rates have fallen since you fixed, break costs can be substantial. If rates have risen, the break cost may be zero or even result in a small rebate.

Break costs can run into tens of thousands of dollars on large loan amounts, which makes a fixed term unsuitable for investors who may need to sell or refinance quickly. Before locking in a term longer than one year, consider whether you might need to access equity, sell, or restructure within that period. If there's any chance, a variable rate or a shorter fixed term is usually safer.

Tax Treatment and Interest Deductions on Fixed Investment Loans

Interest on an investment loan is deductible as long as the property is rented or genuinely available for rent. Whether the rate is fixed or variable makes no difference to the deduction, but a fixed rate gives you a known annual interest figure, which can make tax planning more predictable.

Under the new negative gearing rules taking effect from July next year, losses on residential investment properties purchased after May this year will be quarantined and can only be offset against other residential rental income or carried forward. If you purchased before that date, or if you're buying an eligible new build, existing negative gearing rules continue to apply. A fixed rate doesn't change the tax treatment, but it does give you certainty over the size of the deduction, which can be helpful if you're forecasting your tax position or managing multiple income streams.

Call one of our team or book an appointment at a time that works for you. We can walk through your loan options, compare fixed and variable terms, and structure an investment loan that fits your strategy and timing.

Frequently Asked Questions