Split Loan Strategy — How It Works in Australia (2026)
A split loan divides your home loan into two (or more) portions — part on a fixed interest rate and part on a variable rate. It is a compromise strategy that trades some rate certainty for some flexibility.
What Is a Split Loan?
A split loan (also called a split-rate loan) means you have:
- Fixed portion: A set interest rate for a defined term (e.g., 1, 2, 3, or 5 years) — repayments are predictable, no offset account on fixed portion, extra repayments often capped
- Variable portion: Rate moves with market conditions — usually comes with offset account and unlimited extra repayments
Example:
- Total loan: $700,000
- Fixed portion: $400,000 at 5.89% fixed for 2 years
- Variable portion: $300,000 at 6.04% variable
Why Borrowers Choose Split Loans
| Reason | Explanation |
|---|---|
| Rate certainty on part of the loan | You know exactly what the fixed portion costs for the term |
| Flexibility on the rest | Variable portion allows extra repayments, offset account |
| Hedge against rate movements | If rates rise, fixed portion is protected. If rates fall, variable portion benefits. |
| Avoid all-or-nothing decision | You don’t have to fully commit to fixed or fully commit to variable |
How the Split Works in Practice
Example: $700,000 total loan, $400k fixed / $300k variable
- Fixed monthly repayment (P&I at 5.89%, 25-yr): ~$2,552
- Variable monthly repayment (P&I at 6.04%, 25-yr): ~$1,937
- Total monthly repayment: ~$4,489
On the variable portion:
- Offset account available — all salary and savings reduce variable interest
- Unlimited extra repayments allowed
- If rates fall, variable repayment falls
On the fixed portion:
- Extra repayments typically capped at $10,000/year
- No offset account (or partial offset only)
- Rate locked regardless of market moves
How to Decide the Split Ratio
There is no universal right answer — the split ratio depends on:
Lean toward more fixed (e.g., 60–80% fixed) if:
- Tight budget — you need certainty on most repayments
- You believe rates will rise significantly
- Unlikely to need to access extra funds via redraw or offset
Lean toward more variable (e.g., 30–50% fixed) if:
- You have significant savings to keep in offset
- You want the flexibility to make large extra repayments
- You believe rates will fall (2026 context: RBA cutting cycle underway)
- You may want to sell or refinance within the fixed term
A common approach: Fix 40–60% of the loan for medium-term certainty while keeping the majority variable for flexibility and offset benefit.
Break Costs Only Apply to the Fixed Portion
If you need to exit the loan or refinance before the fixed period ends, break costs only apply to the fixed portion — not the variable portion.
The variable portion can be closed or refinanced at any time with no break cost (though standard discharge fees apply).
This is a key advantage of splitting — your total exposure to break costs is limited to the fixed portion amount.
Rate Environment Context (April 2026)
With the RBA cash rate at approximately 3.85% in April 2026 and an expectation of further potential cuts, many economists have expected variable rates to trend lower in 2025–2026. This context affects the split decision:
- Fixing a large portion at current rates could mean missing rate cuts on that portion
- Keeping more on variable preserves downside rate benefit
- However, economic forecasts are uncertain — rate cuts may be fewer or slower than anticipated
Rate decisions should be based on your personal circumstances, not market speculation.
Offset Account on a Split Loan
Most lenders link a 100% offset account to the variable portion only. Funds in the offset reduce interest on the variable portion exclusively — not the fixed portion.
Example:
- Variable portion: $300,000
- Offset account balance: $50,000
- Interest charged on variable: $300,000 − $50,000 = $250,000
- Fixed portion: $400,000 (unaffected by offset)
To maximise offset benefit on a split loan, a larger variable portion allows more of the offset balance to work.
Splitting an Existing Loan
If you currently have a variable rate loan and want to split (fix part of it), contact your lender about their partial fixed rate option. This typically involves:
- Requesting a split — specify amounts
- Lender assesses and approves
- The fixed portion is locked at the current fixed rate offer
- The variable portion continues as before, with offset
Note: Splitting an existing loan may involve a loan variation fee ($100–$350 typically).
Frequently Asked Questions
Can I have more than two splits?
Some lenders allow three or more splits (e.g., two fixed portions at different terms plus a variable). This adds complexity but can provide additional hedging.
What happens when the fixed term ends?
The fixed portion automatically reverts to the lender’s standard variable rate (often called the SVR — typically higher than discount variable rates). Set a calendar reminder 60–90 days before the fixed term expires to negotiate a new rate or refinance.
Is a split loan more expensive to set up?
Usually not — the application process is the same. The main operational difference is managing two loan portions rather than one.
Does a split loan suit investors?
It can — but for investment loans, the tax implications of offset (on the variable portion) vs extra repayments (on the fixed portion) should be considered carefully. Speak with a registered tax agent.
Related Guides
- Should I Fix My Rate or Go Variable Right Now?
- What Happens If I Pay Off My Fixed Rate Early?
- How Offset Accounts Save You Money
- Extra Repayments — How Much Do They Save?
- Mortgage Repayment Hub
This article provides general information about split home loans in Australia. Rate examples are illustrative only — actual rates vary by lender and change frequently. For advice tailored to your situation, speak with a licensed mortgage broker. Find one through MoneySmart.