Fixed Rate Investment Loans: Avoid These 3 Mistakes

Fixed rate investment loans give you repayment certainty, but picking the wrong term length is one of the most common missteps we see from property investors.

The decision between a one-year, three-year or five-year fixed term often gets reduced to which rate looks lowest on the comparison table. Yet the term you lock in determines whether you can refinance smoothly, access equity for your next purchase, or pivot your strategy without paying thousands in break costs. The rate matters, but the term matters more when your plans involve more than one property or a shift in income down the line.

Fixing for Five Years Without an Exit Plan

A five-year fixed rate gives you the longest stretch of repayment certainty, but it also assumes your borrowing needs, rental income and property strategy will stay unchanged until the term ends. Most investors need flexibility well before that.

Consider a buyer who fixes an investment loan for five years at a competitive rate, then 18 months later finds a second property they want to purchase. To access the equity in the first property for a deposit, they need to refinance. The lender calculates break costs based on the difference between the fixed rate and the wholesale rate for the remaining term, plus an administration fee. With three and a half years still to run, the break cost can reach several thousand dollars, enough to wipe out any benefit the original discount delivered.

If you intend to grow a portfolio or expect a change in employment, rental income or family circumstances within the fixed period, a shorter term or a split structure gives you room to move without penalty. Fixing a portion of the loan while leaving another portion variable lets you make extra repayments, redraw funds or refinance part of the debt without triggering break costs on the entire balance.

Choosing a One-Year Fix When Rates Are Falling

A one-year fixed rate appeals when you want certainty but don't want to commit for long. The risk is that you lock in at a point where variable rates are already trending down, then spend 12 months paying more than you would have on a variable product.

In our experience, investors who fix for one year usually do so because they are uncertain about the direction of rates or their own plans. That uncertainty is valid, but a one-year term often forces you to refinance or refix just as your LVR improves or your equity position strengthens. If you are confident rates will fall or you plan to sell within two years, a variable rate or an offset facility linked to your variable portion may serve you more effectively than a short fixed term.

The other issue with short fixes is that lenders tend to offer their sharpest discounts on longer terms. A one-year rate might sit 0.20 to 0.40 percentage points higher than a three-year equivalent, which reduces the value of fixing in the first place. You pay for certainty but receive less rate benefit and less time to make use of it.

Locking in the Full Loan Amount on Interest-Only Terms

Many investors prefer interest-only repayments to maximise tax deductions and preserve cash flow, particularly in the early years of ownership. Fixing the entire loan amount on an interest-only basis sounds efficient, but it removes any ability to make principal repayments or access redraw during the fixed period.

If rental income drops due to a vacancy or unexpected repair costs, you cannot adjust your repayment structure or draw on any principal you have paid down. The loan remains rigid until the fixed term expires. A split structure where part of the loan is fixed interest-only and part remains variable gives you the tax benefit of interest-only repayments while keeping a portion of the debt flexible enough to handle income fluctuations or capital works.

The other consideration is that most lenders limit interest-only periods to five years, after which the loan reverts to principal and interest. If you fix for five years on interest-only terms and the loan converts to principal and interest at the same time the fixed period ends, your repayment can jump significantly. Planning the reversion date separately from the fixed term end date avoids that double adjustment and gives you more control over cash flow.

Ignoring the DTI Cap When Planning a Second Purchase

The debt-to-income cap introduced in February limits how much you can borrow relative to your gross income. If you fix your first investment loan for three or five years, then apply for a second loan before the term ends, the lender assesses your serviceability with both loans included in your total debt. If your combined borrowing exceeds six times your income, you fall into the capped portion of the lender's book, and approval becomes harder.

This matters when you fix a large loan amount early in your investment journey. The fixed loan cannot be restructured or reduced without break costs, so your debt position stays locked even if your income rises or your LVR improves. A variable loan or a shorter fixed term gives you the ability to reduce the balance, switch to principal and interest, or refinance to a lower rate before applying for your next property, keeping your DTI ratio under the threshold.

If you are planning to build a portfolio, model your borrowing capacity with all intended purchases included before you fix any single loan. Locking in the wrong term on your first property can prevent the second from proceeding, even when the equity and deposit are in place.

Fixed Terms and the Negative Gearing Changes from July 2027

From July next year, net rental losses on most established investment properties purchased after May this year cannot be offset against salary or wage income. The losses are quarantined and can only be used against future rental income or capital gains from residential property. If you bought an established property in the transitional period and fixed the loan for three or five years, you need to consider how the quarantining affects your cash flow once the transitional rules end.

A property that generates a small rental loss under the current rules may become unaffordable once that loss can no longer reduce your taxable income from other sources. If you have fixed the loan for five years, you cannot adjust the interest rate, switch to principal and interest to reduce the deductible interest, or refinance to a cheaper rate without paying break costs. Planning the fixed term around the July 2027 change date gives you the option to reassess your structure before the new rules take full effect.

Properties classified as eligible new builds retain access to negative gearing under the existing rules. If you purchased a new build and fixed the loan, the benefit continues beyond July 2027, and a longer fixed term may suit your strategy. The key is matching the term to the tax treatment that applies to your specific property, not to investment properties in general.

How Savvy Home Loans Structures Fixed Terms for Investors

We typically recommend a split structure for most investors: 50 to 70 per cent of the loan fixed for two or three years, and the remainder on a variable rate with offset and redraw. The fixed portion gives you repayment certainty and protects you if rates climb. The variable portion gives you flexibility to make extra repayments, access equity for your next purchase, or refinance part of the loan without penalty.

The split ratio depends on your income stability, portfolio plans and how much rental income fluctuation you expect. If you are in a secure role with predictable income and no immediate plans for a second property, you might fix a higher portion. If you are building a portfolio or expect a career change, a lower fixed portion or a shorter term keeps your options open.

We also look at the reversion date for interest-only terms and the end date of any fixed rate period. Aligning those dates, or staggering them deliberately, prevents your repayment from jumping twice in the same month and gives you time to plan a refinance or rate switch before the change takes effect.

Call one of our team or book an appointment at a time that works for you. We will model your borrowing capacity, compare fixed and variable options across lenders, and structure the loan so the term fits your investment timeline, not just the rate table.

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