Property Purchase
Fixed Vs Variable Interest Rates
5 min read- Finance Guide
- Updated 2026
Quick answer
Fixed gives certainty, variable gives flexibility
30+ Year terms common
Split loans can combine both structures
- Fixed rate period Often 1 to 5 years
- Variable rate feature Repayments can move
- Split option Part fixed, part variable
- Break risk Applies mainly to fixed loans
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1300 421 044
Detailed explanation
A fixed rate locks in the interest rate for an agreed period, which can make budgeting easier because scheduled repayments are more predictable during that time. A variable rate can rise or fall over the life of the loan, which means repayments may change, but variable loans often come with more flexible features and fewer restrictions. Some borrowers choose a split loan so part of the debt is fixed and the balance remains variable.
Core parts of fixed and variable rate loans
Fixed rate period
Usually set for a defined term such as 1 to 5 years before reverting
Variable movement
The rate can move with lender pricing and broader market conditions
Repayment certainty
Fixed rates usually provide more short term repayment certainty
Flexible features
Variable loans more commonly allow offset, redraw and extra repayment freedom
Break costs
Ending or changing a fixed loan early can trigger break fees
Split loan option
Part fixed and part variable can balance certainty with flexibility
Why borrowers choose fixed rates
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Repayments are easier to budget for during the fixed period
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Protection from rate rises while the fixed term remains in place
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Can suit borrowers with tighter cash flow or a need for certainty
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Often chosen when holding strategy is clear for the next few years
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May involve less flexibility around early payout or loan changes
Why borrowers choose variable rates
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More flexibility for extra repayments, refinancing and restructuring
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Commonly better suited to offset accounts and redraw features
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Borrowers can benefit if the lender cuts rates in future
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Repayments can increase if rates rise, so buffers matter
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Can suit borrowers who value flexibility over short term certainty
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Split structures can be used if neither pure option feels ideal
Common interest rate structures
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Fixed rate Certainty for a set period, less flexibility
Stable repayments -
Variable rate Flexible features, repayments can move
More flexible -
Split loan Combines fixed certainty with variable flexibility
Balanced approach
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How the choice usually gets made
Borrowers normally compare the following before selecting a fixed, variable or split structure:
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01. How sensitive the household or investment cash flow is to repayment changes
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02. Whether repayment certainty is more important than flexibility
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03. Whether offset, redraw or extra repayment features are needed
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04. How long the property is likely to be held before refinance or sale
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05. Whether an early exit from a fixed period could create break costs
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06. How the lender prices fixed and variable options at the time of application
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07. How the lender assesses serviceability under current policy settings
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08. Whether a split loan would better match the borrower’s objectives
Common Problems
Interest rate choice can create problems when the structure suits the headline rate but not the borrower’s broader plans. The biggest mistakes usually involve ignoring flexibility, underestimating repayment movement, or locking in a structure that becomes expensive to change.
Fixed loan becomes restrictive
A borrower may later want to refinance, sell, or make larger changes and discover that the fixed structure is costly to unwind.
Possible solutions include:
- Match the fixed period to the likely holding period
- Check break cost risk before locking in
- Use a split structure instead of fixing the whole debt
- Review feature restrictions before signing
Variable repayments rise too quickly
A borrower on a variable rate may be comfortable initially but later feel pressure if the lender increases rates.
Possible solutions include:
- Test affordability at higher repayment levels early
- Use offset balances to reduce interest exposure
- Reduce other debts where possible
- Consider fixing part of the loan if certainty is needed
Choice is based only on the headline rate
Focusing only on the advertised rate can overlook offset value, fee structure, repayment freedom and future plans.
Possible solutions include:
- Compare features as well as price
- Review total flexibility over the expected holding period
- Model different scenarios for refinancing or sale
- Choose structure around strategy, not only today’s rate
Steps To Get Finance
Step
01
Review cash flow, buffers and how much repayment certainty matters.
Step
02
Compare fixed, variable and split loan options side by side.
Step
03
Check features such as offset, redraw, extra repayments and break risk.
Step
04
Confirm the loan structure that best suits the purchase and holding strategy.
Step
05
Proceed through approval with the chosen rate structure built into the loan.
Step
06
Review the structure over time and refinance or restructure if circumstances change.
Speak With A Property Loan Specialist
Choosing the right rate structure is not just about whether rates might rise or fall. It is also about how much flexibility, stability and future option value you want built into the loan.
A specialist can compare lender policy, pricing and structure to help narrow down what is actually suitable.
Speak with a finance specialist about fixed, variable or split loan options.
Submit the short form below and a property finance specialist will review your scenario and discuss possible loan structures.
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