Should I fix my interest rate or go variable?
Fixed rates lock in your repayment for a set period — usually 1 to 5 years — giving you certainty regardless of RBA movements. Variable rates move with the market, meaning repayments can fall or rise, but you keep full access to features like offset accounts and unlimited extra repayments. Most buyers choose based on whether budget certainty or loan flexibility matters more to them right now.
The Fuller Picture
A fixed rate loan locks your interest rate for a set period, typically 1, 2, 3 or 5 years. During that time your repayments stay the same regardless of what the Reserve Bank of Australia does with the cash rate. This makes budgeting straightforward, which is why many buyers find fixed rates appealing when they first take on a mortgage.
Variable rates move in line with your lender's standard variable rate, which is influenced — though not mechanically tied — to the RBA cash rate. When rates fall, you benefit automatically. When they rise, your repayments go up. Variable loans also come with features fixed loans generally don't: unlimited extra repayments, full offset account functionality, and a redraw facility. Used well, these features can meaningfully reduce the total interest you pay over the life of the loan.
A split loan lets you do both: fix part of your borrowing and keep part variable. This gives you rate certainty on one portion while retaining flexibility on the rest. It is not a compromise — it is a deliberate structure that many lenders support and that suits buyers who want some of each.
What This Means for Your Purchase
The biggest practical limitation of fixing is that you lose flexibility. If you sell the property, refinance, or want to make large lump sum repayments during the fixed term, you may face break costs. These are calculated by the lender based on wholesale interest rate movements — not a flat fee — and can run into tens of thousands of dollars in some situations.
Variable loans are more forgiving if your circumstances change. The trade-off is uncertainty: if rates rise significantly, your repayments rise with them. In a rising rate environment, buyers who fixed early were shielded from increasing repayments; in a falling rate environment, those on variable loans benefited first without needing to do anything.
Neither option is objectively better. The decision comes down to whether rate certainty or loan flexibility matters more to you right now. If your budget is tight and a rate rise would create genuine repayment stress, fixing gives you a known cost to plan around. If you expect to make extra repayments or your income is likely to grow, a variable loan with an offset account often delivers better long-term outcomes.
How This Shows Up in the Illawarra
In the Illawarra, many buyers are purchasing entry-level houses in the $700,000 to $950,000 range where monthly repayments stretch household budgets. In those situations, knowing exactly what your repayment will be for the next two or three years has real value. Some buyers choose a short fixed term — one or two years — while they settle into ownership, then reassess when it expires and their financial picture is clearer.
For buyers targeting investment properties, particularly in Wollongong's unit and townhouse market, variable rates with offset accounts are often preferable. They offer tax flexibility and the ability to recycle capital more efficiently as equity grows. A mortgage broker who works regularly with Illawarra buyers can model both options against your actual purchase price and borrowing capacity before you commit.
Frequently Asked Questions
Can I switch from fixed to variable before my term ends?
Yes, but you will likely pay a break cost. These costs are calculated using the lender's wholesale funding costs and can be large. Always get a written quote from your lender before deciding to switch.
Does fixing my rate mean I lose my offset account?
In most cases, yes. Fixed rate products generally do not include a fully functioning offset account. Some lenders offer a partial or capped offset, but the full interest-saving benefit is typically only available on variable rate loans.
Is there a better option for first home buyers?
Not automatically. First home buyers who need budget certainty during their first few years sometimes prefer fixed rates. But if you plan to pay down your loan aggressively or are eligible for a scheme with specific loan requirements, a variable loan with an offset may suit you better. Talk through both with a broker.
When does the fixed rate get locked in — at approval or settlement?
The fixed rate is locked when you accept the lender's offer, not at settlement. If rates change between approval and settlement, your agreed fixed rate stands, provided settlement occurs within the lender's agreed timeframe — typically 90 days.
What happens when my fixed term expires?
Your loan rolls onto the lender's standard variable rate — called the revert rate — unless you proactively refinance or re-fix. Revert rates are often higher than competitive market rates. Set a calendar reminder three months before your fixed term ends so you have time to shop around.
Can a buyers agent help me decide between fixed and variable?
A buyers agent is not a mortgage broker and does not advise on loan structures. What they can do is connect you with a broker early in the process and ensure your pre-approval and purchase strategy are aligned from the start.
If you're working through your finance options and want to understand how your loan structure might affect your purchase, we're happy to walk through it with you. Reach out and we can point you in the right direction.
