Avoid These 5 Fixed Rate Investment Loan Mistakes

Fixed rate investment loans still function as rate protection, but recent legislative changes mean the decision to fix now carries different consequences depending on when you purchased the property.

If you acquired an established residential property after 12 May 2026, negative gearing losses from 1 July 2027 onwards can only offset rental income or capital gains from residential property, not your salary. That changes how you calculate the value of fixing, because your ability to claim losses against professional income has a defined end date. If you purchased before that date, the existing arrangements apply.

Mistake 1: Fixing Without Accounting for the 2027 Tax Changes

The value of a fixed rate on an investment loan depends partly on whether you can claim the interest expense against other income. From 1 July 2027, if your property was purchased after Budget night and runs at a loss, that loss can only offset residential property income or gains, not wages.

Consider an associate who purchased an established apartment in late May 2026 with a loan of $650,000. The property generates $32,000 annually in rent but costs $48,000 in interest and other deductible expenses. Before 1 July 2027, the $16,000 shortfall reduces taxable income from their legal salary. After that date, the loss carries forward until they have residential property income or a capital gain to offset it against.

If they fix for five years, they lock in certainty over interest costs but also lock in a tax treatment that changes halfway through the loan term. The first year allows full deductibility against salary, the remaining four do not. That makes a five-year fixed term less appealing than it would have been under the prior rules, because the benefit of stable repayments is partly offset by deferred deductions. A shorter fixed term, or splitting the loan between fixed and variable, lets them reassess settings once the new rules take effect.

Mistake 2: Ignoring Break Costs When Your Circumstances Change

Fixed rate loans charge break costs if you repay early, refinance, or pay down more than the allowable extra repayment amount. The cost depends on the difference between your fixed rate and the lender's cost to re-lend that money at current wholesale rates.

If you fixed at 5.8% and wholesale rates have since risen, break costs are often minimal or zero because the lender can re-lend at a higher rate. If rates have fallen and the lender can only re-lend at 4.2%, you pay the difference across the remaining fixed period. On a $700,000 loan with three years remaining, that difference can exceed $30,000.

Lawyers expanding their property portfolio or refinancing to access equity for a second purchase need to account for this. If your fixed loan has two years remaining and you want to pull equity out for another deposit, the break cost may exceed the benefit of accessing that equity now rather than waiting. Running the numbers with your broker before committing to a purchase contract avoids discovering a $25,000 break cost when you apply for pre-approval.

Fixed Rate Loans and Interest-Only Structures: What Actually Works

Interest-only investment loans reduce your required monthly outlay and preserve cash flow, which matters if you are managing repayments on both an owner-occupied home and an investment property. Most lenders allow interest-only periods of up to five years on investment loans, after which the loan reverts to principal and interest unless you apply to extend.

You can fix an interest-only loan, but the fixed term and the interest-only period do not have to align. You might fix for three years while the interest-only period runs for five, or fix for five years with a three-year interest-only period. At the end of the interest-only period, the loan switches to principal and interest repayments, which increases your monthly cost even if the rate stays the same.

In our experience, investors who fix for five years on an interest-only basis without planning for the reversion to principal and interest often find themselves with a payment increase they did not budget for partway through the fixed term. If your interest-only period ends in year three of a five-year fix, your repayments jump and you cannot refinance without paying break costs. Matching the fixed term to the interest-only period, or deliberately choosing a shorter fixed term, gives you more control over when repayments increase.

Mistake 3: Locking in the Full Loan Amount on a Fixed Rate

Fixing your entire loan limits flexibility. Most fixed rate products allow minimal extra repayments, typically $10,000 to $30,000 per year depending on the lender. Anything beyond that incurs break costs.

Splitting the loan between fixed and variable gives you rate protection on part of the balance while keeping a portion accessible. That variable portion can be paid down without penalty, used to redraw funds if needed, or refinanced independently of the fixed portion.

A senior associate with a $580,000 investment loan might fix $400,000 for three years and leave $180,000 on a variable rate. If they receive a distribution from a family trust or a performance bonus, they can pay down the variable portion and reduce overall interest without triggering break costs. If they want to access equity or refinance, only part of the loan is locked in. This structure is covered in more detail under investment loan options specific to the profession.

Mistake 4: Fixing Without Comparing Lender-Specific Features

Not all fixed rate investment loans are structured the same way. Some lenders allow offset accounts against fixed rate loans, others do not. Some allow you to switch from interest-only to principal and interest partway through the fixed term without penalty, others treat that as a variation and charge break costs.

If your investment property is negatively geared and you want to maximise deductions, an offset account on the fixed portion provides no tax benefit because you are not reducing the loan balance. But if you are paying down a variable split at the same time, the offset account may still be useful for short-term liquidity.

Another feature to check is portability. If you sell the investment property during the fixed term, some lenders let you transfer the fixed rate loan to a new property without break costs, provided the new loan amount is equal to or greater than the remaining balance. That feature matters if you are selling an apartment to upgrade to a house, or disposing of one investment to acquire another. Without portability, you pay break costs even though you are not exiting the loan, just moving it.

Mistake 5: Forgetting to Reassess When the Fixed Term Ends

When a fixed term ends, the loan automatically rolls onto the lender's standard variable rate unless you proactively choose a new rate or refinance. Standard variable rates are typically higher than the discounted variable rates offered to new customers or those refinancing.

If you fixed three years ago and do nothing when the term expires, you might roll onto a rate 0.5% to 0.8% higher than what is currently available. On a $600,000 loan, that difference costs over $3,000 annually. Setting a reminder six months before your fixed term expires gives you time to review your options, compare rates, and either negotiate with your current lender or move to another. Investment loan refinancing often delivers lower rates and improved loan features without the restrictions of your original fixed product.

This also applies if your investment strategy has changed. If you initially chose interest-only to maximise cash flow but now want to reduce debt ahead of retirement, the end of a fixed term is the right time to switch to principal and interest repayments. If the property has increased in value and your loan to value ratio has improved, you may now qualify for a lower rate tier or avoid LMI on any future borrowing. Treating the fixed rate expiry as a scheduled review point, not just an automatic rollover, keeps your loan aligned with your current circumstances.

Fixed rate investment loans still serve a purpose for lawyers managing cash flow and building wealth through property, but the decision to fix now requires closer attention to the tax changes taking effect in 2027, the structure of your loan, and the features that matter when your circumstances shift. Call one of our team or book an appointment at a time that works for you.

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