Fixed vs Variable Rate Mortgage in Australia — Which Is Better?
Choosing between a fixed and variable rate mortgage is one of the most important financial decisions a property buyer makes. The wrong choice can cost tens of thousands of dollars over the life of a loan. Here is an honest, plain-English guide to help you decide.
What Is a Fixed Rate Mortgage?
A fixed rate mortgage locks your interest rate for a set period — typically one to five years. Your repayments stay the same regardless of what the Reserve Bank of Australia does with the official cash rate. After the fixed period ends, the loan usually rolls to a variable rate.
What Is a Variable Rate Mortgage?
A variable rate mortgage has an interest rate that moves up or down in line with the RBA cash rate and your lender’s own decisions. Your repayments change when rates change. Variable loans typically offer more flexibility — offset accounts, redraw facilities, and the ability to make extra repayments without penalty.
Fixed vs Variable — Key Comparison
| Feature | Fixed Rate | Variable Rate |
|---|---|---|
| Repayment certainty | Yes — locked in | No — changes with rates |
| Extra repayments | Limited or not permitted | Usually allowed |
| Offset account | Rarely available | Widely available |
| Break costs if you sell or refinance | Can be significant | Usually nil or minimal |
| Benefit if rates fall | No — you stay at fixed rate | Yes — your rate falls too |
| Benefit if rates rise | Yes — you stay at fixed rate | No — your rate rises too |
What Most People Get Wrong
- Fixing their rate right before rates fall — locking in a high rate for years
- Not reading the break cost clauses before fixing — break costs can run into tens of thousands
- Splitting loans unnecessarily — sometimes a clean variable loan with an offset is simpler and better
- Choosing a rate based on what feels comfortable rather than what fits their strategy
FAQs
Should I split my mortgage between fixed and variable?
A split loan gives you certainty on part of your loan while keeping flexibility on the rest. It is a reasonable strategy if you are uncertain about rates but want some protection. Talk to a mortgage broker about the right split ratio for your situation.
What happens when my fixed rate period ends?
Your loan automatically rolls to your lender’s standard variable rate — which is often higher than the best available variable rates. Refinancing or renegotiating at this point is strongly recommended.
Where a Property Advisor Fits In
Collings Property Advisory does not provide mortgage advice — that is a mortgage broker’s role. But we work closely with buyers who are finalising finance to make sure their property assessment, negotiation strategy, and purchase timeline aligns with their borrowing capacity. Getting the property side right is just as important as getting the finance side right.
Buying a property and want a second opinion on value and negotiation? Collings Property Advisory is $4,500 + GST — a fixed fee covering property assessment, comparable sales analysis, and agent negotiations. Learn more at collings.com.au/portal.
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