Most people choose their loan structure once, at settlement, and rarely think about it again. But fixed, variable and split loans behave very differently once interest rates start moving, and the right choice depends far more on your own circumstances than on what rates are doing in any given month.
With the RBA lifting the cash rate to 4.85% on 3 November, the fifth rise this year, the structure of your loan is a live question for a lot of borrowers. Here’s how the three actually compare, and how to think about which one fits you.
Variable Rate Loans
A variable rate moves with the market, usually in step with (though not identical to) changes in the RBA cash rate.
What it offers:
- Flexibility to make extra repayments without penalty on most loans
- Access to features like an offset account or redraw facility
- The ability to refinance or switch lenders without break costs
What it doesn’t offer: certainty. Your repayment can rise (or fall) with the market, which can make budgeting harder if your income is tight or irregular.
That’s the exposure variable-rate borrowers are feeling right now. The ABC reported that Westpac, NAB, ANZ and CBA will pass the latest 0.25 percentage point rise on to variable home loan rates from 13 November.
Fixed Rate Loans
A fixed rate locks in your interest rate, and therefore your repayment, for a set period, typically one to five years in Australia.
What it offers:
- Repayment certainty for budgeting, which particularly suits people on a tight or single income
- Protection if rates rise during the fixed term
What it doesn’t offer:
- The benefit if rates fall during the fixed term
- Full flexibility: most fixed loans cap extra repayments and charge break costs if you exit early or refinance mid-term
- An offset account on many fixed products (some lenders offer a limited or partial offset, but it’s not universal)
It’s also worth understanding what happens at the end of the term. Without action, your loan automatically rolls onto your lender’s standard variable rate, often a less competitive one than what’s available elsewhere.
Split Loans
A split loan divides your borrowing between a fixed and a variable portion, in whatever ratio you choose. 50/50 is common, though it doesn’t have to be.
What it offers:
- Partial repayment certainty on the fixed portion
- Flexibility and offset access on the variable portion
- A genuine middle ground if you can’t decide, or want to hedge against rate movements either way
What it doesn’t offer: the maximum upside of either pure structure. If rates fall, only your variable portion benefits. If rates rise, only your fixed portion is protected.
So, Which One Actually Suits You?
There’s no universally “right” structure. It depends on a few honest questions:
How much certainty do you need?
If a rate rise would genuinely strain your budget, locking in some or all of your loan reduces that risk, even if it means giving up some flexibility.
Do you expect to make extra repayments or use an offset heavily?
If building savings against your loan matters to you, a fully variable or split structure usually suits better than a fully fixed one.
How long do you realistically plan to keep this loan or property?
Fixed loans come with break costs if your plans change mid-term. Selling, refinancing or a significant life change can all trigger them.
What’s your risk tolerance, genuinely?
Some borrowers would rather accept a potentially higher average rate over time in exchange for never being surprised by a repayment increase. Others would rather stay flexible and ride out the movements. Neither is wrong. It’s a personal trade-off, not a market-timing decision.
A Common Misconception Worth Clearing Up
Choosing a structure isn’t about predicting where rates are headed. Even experienced economists don’t reliably pick the direction and timing of rate movements, and building a financial decision around a guess is risky. The more useful question is which structure you could comfortably live with under a range of outcomes, not just the one you’re hoping for.
How a Mortgage Broker Can Help
A broker can model what each structure would actually mean for your specific loan amount and circumstances, rather than leaving you to compare headline rates in isolation. Through MTMB’s lender panel, that typically includes:
- Comparing fixed, variable and split options across multiple lenders, not just one
- Modelling real repayment scenarios under different rate movements
- Explaining each lender’s specific rules on offset access, extra repayments and break costs, which vary more than people expect
Ready to Work Out What Suits You?
Not sure whether fixed, variable or a split makes more sense for your situation? Book a free appointment with Money Tree Mortgage Brokers and we’ll walk through it against your actual numbers.
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Frequently Asked Questions
Is a fixed or variable rate better?
Neither is universally better. It depends on your need for repayment certainty, how much flexibility you want, and how long you plan to keep the loan. Each carries different trade-offs; neither is objectively superior.
Can I have an offset account on a fixed-rate loan?
Some lenders offer a partial or limited offset on fixed loans, but it’s not universal and usually more restricted than on a variable loan. Confirm this with specific lenders rather than assuming it’s included.
What happens if I need to break a fixed-rate loan early?
You’ll typically be charged a break cost, calculated based on the difference between your fixed rate and current market rates, among other factors. These costs can be significant, so it’s worth understanding them before fixing.
Can I change the split ratio on a split loan later?
Generally only by refinancing or restructuring the loan, rather than adjusting it on demand. It’s worth choosing a ratio you’re reasonably comfortable with for the medium term.
Is a split loan more expensive than choosing one structure outright?
Not inherently. You’re simply applying two different rates to two portions of the same loan. The overall cost depends on how rates move and how the loan is structured, not on splitting itself.
Do I have to decide this when I first take out my loan?
No. You can restructure an existing loan into a split, or switch between fixed and variable, generally through refinancing or a formal request to your lender. It’s not a decision you’re locked into forever.
Articles are general information. Rules, lender policies and market conditions may change. Check publication and review dates and confirm current details before relying on time-sensitive information.