Variable vs fixed rates: how to choose.
Choosing between a variable rate, a fixed rate, or a mix of both is one of the most important decisions you’ll make when setting up your home loan. There’s no “best” option universally — the right choice depends on your personality, your cashflow, how you manage money, and whether you value certainty or flexibility more.
At Lumo, we help clients understand how each rate type behaves in the real world so they can choose the structure that feels comfortable and supportive of their long-term plans.
How variable rates work
A variable rate moves up or down depending on factors like lender pricing decisions, competition in the market, and changes to the Reserve Bank’s cash rate.
What this means in practice
Your repayments may increase or decrease over time
You can make unlimited extra repayments on most products
You can access offset accounts and redraw
You can refinance or restructure more easily
You benefit quickly if rates fall
You feel the impact immediately if rates rise
A variable rate gives flexibility — ideal for borrowers who want control and the ability to pay their loan down faster.
How fixed rates work
A fixed rate locks in your interest rate for a set period (usually 1 to 5 years).
Your repayments stay the same for that chosen period.
What this means in practice
Repayments are predictable and stable
You’re protected if rates rise
You don't receive the benefit if rates fall
Extra repayments are usually limited
Break costs may apply if you refinance or pay out the loan early
Full offset accounts are rarely available
A fixed rate provides stability — ideal for borrowers who value certainty and want to shield themselves from market movement.
Why many people choose a split loan
A split loan gives you a blend of both worlds.
For example:
$350,000 on a variable rate
$150,000 on a fixed rate
Benefits of splitting:
Part of your loan stays predictable
Part remains flexible for extra repayments and offset
Smaller fixed portion reduces the risk of being “locked in”
You can take advantage of different rate environments
Splits can be customised — 50/50, 70/30, 80/20 — whatever suits your goals and cashflow.
How to think about choosing between fixed and variable
A few helpful questions:
Do you value stability or flexibility more?
If stable repayments help you budget confidently → fixed.
If you prefer complete freedom → variable.
Do you expect to make extra repayments?
If yes → variable or split is usually better.
Are you planning renovations, selling, or refinancing soon?
Fixed rates may not suit borrowers expecting major changes, due to break costs.
Is your income stable or variable?
Borrowers with fluctuating income often prefer variable rates to allow flexibility in repayments.
Do interest rate movements worry you?
If rising rates cause stress → a partial fixed portion may provide comfort.
Common misconceptions
“Fixed rates are always cheaper.”
Not necessarily. Fixed products may cost more upfront or restrict features.
“Variable rates are too risky.”
They offer powerful benefits — especially for borrowers who want to pay their loan down faster.
“You must choose one or the other.”
Splits are incredibly common and often provide the best balance.
“You shouldn’t break a fixed loan.”
Break costs can be high, but not always — it depends on movements in wholesale rates.
We always check before making comparisons.
How we help clients choose
We walk through:
Repayment comparisons
Your cashflow and financial habits
Whether you plan to make extra repayments
Your risk comfort level
Market conditions and lender pricing
Your upcoming plans (renovations, moving, investing)
The goal is not to guess interest rate movements — it’s to choose a structure that supports your life and feels good day-to-day.
Let’s chat.
If you’re deciding between variable, fixed or a split structure, we can model the differences and help you choose what suits your goals and your comfort level. Let’s chat.
This page provides general information only and has been prepared without taking into account your objectives, financial situation or needs. We recommend that you consider whether it is appropriate for your circumstances and your full financial situation will need to be reviewed prior to acceptance of any offer or product. It does not constitute legal, tax or financial advice and you should always seek professional advice in relation to your individual circumstances. Subject to lenders terms and conditions, fees and charges and eligibility criteria apply.