When to Lock In and When to Break a Fixed Rate

Fixed Rate Break Costs: How the Calculation Works

A break cost is the fee your lender charges if you exit a fixed rate loan before the fixed period ends. The fee compensates the lender for the difference between the rate you agreed to and the rate they can now lend at in the wholesale market. If rates have dropped since you fixed, you'll pay more to break. If rates have risen, the break cost may be zero or close to it.

Consider a buyer who fixed $600,000 at 5.8% for three years in mid-2025. Eighteen months later, they want to sell and upgrade. Variable rates have since dropped to 5.2%. The lender calculates the break cost by comparing what they would have earned from the buyer's fixed loan over the remaining eighteen months to what they can now earn by re-lending that money at the current wholesale rate. The difference is roughly $12,000. That cost gets deducted from the sale proceeds at settlement.

The formula uses the present value of the interest rate differential across the remaining fixed term. Most lenders provide a break cost estimate within 24 hours of request, but the exact figure isn't locked in until discharge is processed. If you're considering a sale, request the estimate before you list the property.

Should You Fix Part of Your Loan or All of It?

A split structure lets you divide your loan between fixed and variable portions. One half might be fixed at a set rate for three years, while the other half stays variable with access to an offset account. The fixed portion protects you from rate rises. The variable portion keeps your repayments flexible if you want to pay extra or access redraw.

In our experience, buyers in Bulimba who plan to stay in the property for five years or more often fix 50% to 70% of the loan. They want certainty around the base repayment but don't want to lose access to offset or the ability to make lump sum payments without penalty. A fixed loan typically doesn't allow extra repayments beyond a small annual threshold, often $10,000 to $20,000 depending on the lender.

The risk with fixing the full amount is inflexibility. If your income increases and you want to pay down the loan faster, you'll hit the extra repayment cap. If rates drop and you want to refinance, you'll face the break cost calculation described above. Splitting the loan reduces that exposure while still giving you a portion of locked-in certainty.

When a Rate Lock Makes Sense for a Bulimba Buyer

Bulimba sits close to the city, borders the river, and attracts a mix of young families and professionals upgrading from apartments in neighbouring suburbs like Hawthorne or East Brisbane. Properties here tend to hold value, but most buyers stretch their budget to secure a home within the school catchments or near Oxford Street.

Locking in a fixed rate makes sense when you're borrowing close to your limit and can't afford a repayment increase over the next two to three years. If your household income is stable but there's no capacity to absorb a rate rise of even 0.5%, fixing part or all of the loan removes that risk. It also makes sense if you're planning to start a family or reduce work hours within the fixed period, because your repayments stay predictable.

It doesn't make sense if you're planning to sell within 18 months, or if you expect a significant pay rise or bonus that you'll want to put straight onto the loan. In those scenarios, the benefit of fixing is outweighed by the cost and restriction it creates.

What Happens When Your Fixed Rate Ends

When the fixed period finishes, your loan automatically reverts to the lender's standard variable rate unless you choose a new fixed term or refinance to another lender. The standard variable rate is almost always higher than the discount variable rate offered to new customers, sometimes by 0.5% to 1% or more.

This is the point where many buyers get caught paying more than they should. If you fixed three years ago and your rate expires, don't assume your current lender will offer you a competitive rate to re-fix or stay variable. They won't. You'll need to ask, or move. Most lenders will contact you 30 to 60 days before your fixed rate ends, but the offer they send is rarely the lowest rate available in the market.

If you want to re-fix or switch back to variable with your current lender, request a retention rate before the fixed period ends. If you want to refinance, start the process at least 60 days out so settlement aligns with your fixed rate expiry. Moving early avoids break costs and keeps you on a competitive rate.

The Benefit of Fixing When Rates Are Expected to Rise

If the Reserve Bank signals further rate rises or economic conditions point to tightening, fixing locks in your current rate before those rises take effect. This was the scenario in late 2023 and into early 2024, when many buyers fixed to avoid further increases.

The downside is timing. If you fix and rates then fall, you're locked into a higher rate and face a break cost to exit. There's no way to predict rate movements with certainty, which is why many buyers prefer a split structure rather than fixing the full loan. You gain some protection without locking in all your borrowing.

For first home buyers in Bulimba using the Australian Government 5% Deposit Scheme, a fixed rate can add certainty to an already tight budget. You're borrowing with a smaller deposit, your repayments are higher relative to your income, and there's less buffer if rates move. Fixing part of the loan gives you a known repayment amount while keeping some flexibility on the variable portion.

Break Costs Are Not the Same as Exit Fees

An exit fee is a flat charge, typically a few hundred dollars, that some lenders apply when you close a loan or refinance away. A break cost is calculated based on interest rate differentials and can run into thousands or tens of thousands depending on the amount borrowed, the remaining fixed term, and how much rates have moved.

If you're selling or refinancing and your loan is variable, you'll only pay the exit fee if one applies. If your loan is fixed, you'll pay both the exit fee and any applicable break cost. Some lenders waive exit fees entirely. Break costs are never waived unless the rate movement works in your favour and the cost calculates to zero.

Before committing to a fixed rate, confirm the lender's break cost formula and whether it applies if you sell the property. Some lenders calculate break costs using a standard economic cost method. Others use a fixed administration fee model. The method affects the final amount, sometimes significantly.

Refinancing with a Fixed Rate Still in Place

You can refinance while a fixed rate is still active, but the break cost will apply unless rates have risen enough to offset it. Most buyers refinance at the end of their fixed term to avoid this cost. If rates have dropped significantly since you fixed and you're unhappy with the current repayment or lender, calculate the break cost and compare it to the interest saving you'd make by refinancing now.

In a scenario like this: a buyer fixed $700,000 at 6.2% for three years. Two years in, variable rates have dropped to 5.4%. They request a break cost estimate and it comes back at $9,500. If they refinance now and save 0.8% per year on the remaining balance, the saving over the next 12 months is roughly $5,600, not enough to justify the break cost. They wait another 12 months until the fixed term ends, then refinance without penalty.

If the saving had been larger or the remaining fixed term longer, the break cost might have been worth paying. Each situation depends on the numbers. Don't assume refinancing is off the table just because you're still fixed. Get the estimate and work through the comparison.

Using an Offset Account Alongside a Fixed Loan

Most fixed rate loans don't allow offset accounts, though a small number of lenders offer partial offset functionality with a reduced interest rate benefit. If you fix the full loan amount, you lose access to offset entirely. If you split your loan and keep part of it variable, you can link an offset account to the variable portion only.

An offset account holds your savings and reduces the interest charged on the linked loan balance. If you have $30,000 in offset and a $400,000 variable loan, you only pay interest on $370,000. The more you hold in offset, the less interest you pay. For buyers who maintain a buffer or receive irregular income like bonuses or commissions, offset can save more over time than a lower fixed rate with no offset access.

If you're deciding between fixing and staying variable, factor in how much you typically hold in savings and whether offset will deliver a greater benefit than rate certainty. For some buyers, flexibility and offset outweigh the protection of a fixed rate. For others, knowing the exact repayment each month matters more than saving a few hundred dollars in interest.

Call one of our team or book an appointment at a time that works for you. We'll walk through your current loan structure, your plans for the property, and whether fixing, splitting or staying variable fits your situation and the time frame you're working with.

Frequently Asked Questions