Splitting your loan: part fixed, part variable in 2026

If you’re shopping for a home loan in mid-2026, you face a familiar tension. Variable rates remain elevated – the lowest advertised products hover around 5.69% – while fixed rates have stabilised but offer no guarantee of future savings. Many lenders now push a third option: a split loan, where you divide your mortgage into one fixed-rate portion and one variable-rate portion. This article explains how the strategy works, what 2026 data means for your decision, and where borrowers commonly stumble.

What is a split loan and why consider it in 2026?

A split loan is exactly what it sounds like. Instead of choosing a single interest rate structure, you allocate your total debt across two (or sometimes more) sub-accounts. One portion carries a fixed rate for a set term – typically one to five years – while the other remains on a variable rate, usually with an offset account and unlimited extra repayments.

The appeal in 2026 stems from the Reserve Bank of Australia’s cash rate sitting at 4.35%. While markets do not expect a cut before early 2027, the outlook is uncertain. By splitting, you lock in certainty on part of your loan while retaining flexibility on the rest. For example, if you have a $600,000 mortgage, you might fix $300,000 for three years at 5.39% and keep $300,000 variable at 5.69% (assuming a competitive rate). Your blended rate would be approximately 5.54%, with the ability to make extra payments and use an offset on the variable side.

The 2026 rate environment: RBA 4.35%, variable 5.69%, fixed offers vary

Understanding the landscape helps you decide the split ratio.

• Reserve Bank cash rate: 4.35% (unchanged since November 2024).
• Lowest variable rates for owner-occupiers: around 5.69% (from major banks and some non-bank lenders).
• Three-year fixed rates: broadly between 5.19% and 5.69%, depending on the lender and LVR.
• APRA’s serviceability buffer remains 3%, meaning lenders assess your ability to repay at the variable rate plus 3% – i.e., at least 8.69% if you take the variable portion.
• From February 2026, APRA also caps debt-to-income (DTI) at 6 times for new lending, so your total borrowing may be limited even if you qualify under the buffer.

These numbers show that fixed rates are marginally cheaper than variable in many cases, but the gap is small. A split allows you to take advantage of a slightly lower fixed rate without locking in the entire loan. Meanwhile, the variable portion gives you a home for your offset savings, which can reduce the effective interest you pay.

How to split your loan: practical steps

The mechanics are straightforward. You apply for a single loan facility with two sub-accounts. Most major banks and many smaller lenders offer this structure. Here is the typical process:

• Step 1: Choose your total loan amount, e.g., $700,000.
• Step 2: Decide the split ratio. Common splits are 50/50, 60/40, or 70/30. For example, $350,000 fixed, $350,000 variable.
• Step 3: Pick the fixed-rate term – one, two, three, four, or five years. Three years is most popular in 2026 as it balances certainty with flexibility.
• Step 4: Ensure the variable portion has an offset account and allows unlimited additional repayments.
• Step 5: Submit your application. The lender will assess the entire loan under its serviceability criteria, using the higher variable rate plus the 3% buffer.

One important note: the fixed portion typically limits extra repayments to $10,000–$20,000 per year without incurring a break cost. If you plan to make large lump-sum payments, allocate those expectations to the variable side.

Benefits of splitting: hedge, flexibility, offset

The strategy offers three main advantages that are especially relevant in 2026.

• Hedge against rate rises. If the RBA hikes rates again – unlikely but possible – your fixed portion remains untouched. Conversely, if rates fall, you are only partially exposed on the variable side. This is a classic “don’t put all your eggs in one basket” approach.
• Flexibility for extra repayments. Variable accounts allow unlimited additional repayments. In 2026, many borrowers are using surplus cash to reduce debt faster. With a split loan, you can funnel that extra cash into the variable portion, paying down the part that carries the higher ongoing rate.
• Offset account access. A variable portion with a full offset account lets you park your salary, emergency fund, or any savings to reduce the interest payable. For a borrower with $50,000 in an offset, the effective rate on that segment drops to near zero. This is not possible on a fixed-rate account.

In an environment where the lowest variable is 5.69% and inflation is still above the RBA’s target band, any reduction in net interest is valuable.

Common pitfalls and how to avoid them

Despite its merits, a split loan is not risk-free. Here are the most frequent traps.

Break costs on the fixed portion. If you sell your home or refinance before the fixed term ends, the lender charges a break cost – often thousands of dollars. In 2026, with wholesale rates only slightly below the fixed rate, break costs may be modest, but they can still bite. Mitigate this by choosing a shorter fixed term (one or two years) if you anticipate moving.

Losing offset on the fixed part. Many borrowers mistakenly think the fixed portion also has an offset account. It doesn’t. Only the variable portion can host an offset. If you have significant savings, ensure the variable side is large enough to hold them.

Complexity and monitoring. Managing two sub-accounts means two interest rates, two repayment amounts, and two sets of terms. Some borrowers find it confusing and lose track of their true blended rate. Set up automatic payments and review your loan once a year.

APRA’s DTI cap limits borrowing capacity. Since February 2026, lenders cannot approve loans above a 6x DTI for most borrowers. A split loan itself doesn’t change this, but the fixed portion may require higher minimum repayments, which could push you closer to the cap. Check your DTI before committing.

Fixed-rate expiry mismatch. If you split 50/50 and fix both portions for three years, they expire at the same time. That can leave you with a large amount rolling onto a potentially higher variable rate. Consider staggering the terms – fix one portion for two years and the other for three – to spread the interest rate risk.

Who should consider a split loan in 2026?

The strategy suits several borrower profiles:

• First home buyers using the 2026 FHBG. The First Home Buyer Guarantee now has no income cap, a 5% deposit, and price caps of $1.5M in Sydney, $1M in Brisbane, $950k in Melbourne, and $850k in Perth (from July 2026). If you are buying within these caps, a split loan can give you a low upfront fixed rate on part of the loan while keeping an offset to manage your limited deposit savings.

• Refinancers looking for rate certainty. With variable rates at 5.69% and fixed rates not much lower, many refinancers choose a split to lock in a portion. See our guide on refinancing break-even costs in 2026 for a deeper analysis.

• Borrowers with large offset balances. If you have $100,000 or more in savings, you want that money working against your loan. A split ensures you have a variable portion big enough to hold it.

• Those uncertain about future rate direction. The RBA’s next move is unclear. A split hedges your bets.

Frequently asked questions

Q1: How much can I save by splitting a $500,000 loan?
Assume a 50/50 split. Fixed portion at 5.39% (three-year), variable at 5.69%. Blended rate: 5.54%. Compared to a fully variable loan at 5.69%, the saving on interest in the first year is roughly $750 (before offset benefits). If you hold $30,000 in an offset on the variable side, the effective variable rate drops to about 4.97%, and total savings rise to around $1,200.

Q2: Can I change the split ratio after the loan settles?
Generally, yes, but it depends on the lender. You may be able to split a variable portion into a fixed portion later, or vice versa. However, changing the fixed portion during its term incurs break costs. Best to decide your ratio upfront.

Q3: Does the split affect my borrowing capacity?
Yes, because lenders use the higher variable rate plus the 3% APRA buffer for the entire loan when assessing serviceability. Even if your fixed rate is lower, the assessment rate is at least 8.69% (5.69% + 3%). Also, the 6x DTI cap applies. If your income is $120,000, the maximum loan is $720,000 (6x). A split doesn’t change that cap.

Q4: Is a split loan cheaper than a fixed loan with a redraw?
Not necessarily. A pure fixed loan may have a lower rate but limited extra repayments and no offset. A split offers the offset and unlimited repayments on the variable side. The cost difference depends on your cash flow. If you rarely use offset, a full fixed loan may be cheaper.

Q5: Can I get a split loan with the First Home Buyer Guarantee (FHBG)?
Yes, the FHBG (not the First Home Super Saver Scheme) allows a split loan as long as the lender offers it. The price caps apply: Sydney $1.5M, Brisbane $1M, Melbourne $950k, Perth $850k from July 2026. You need a 5% deposit with no LMI.

Sources

• Reserve Bank of Australia – Cash rate target (June 2026)
• Australian Prudential Regulation Authority – Macroprudential measures (APRA DTI cap effective Feb 2026, buffer unchanged at 3%)
• Housing Australia – First Home Guarantee price cap changes from 1 July 2026 (media release)
• Canstar – Lowest variable home loan rates (owner-occupier, P&I, June 2026)
• State Revenue Offices – FHBG price caps (published July 2026 for QLD, NSW, VIC, WA)

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Use our loan comparison calculator to model your split loan scenario and see the blended rate and monthly repayments. → Loan Comparison Calculator

Want to see how different split ratios affect your repayments instantly? Use our interactive widget below. [data-open-widget="split-loan-calculator"] Open Split Loan Calculator[/data-open-widget]

For more detail on loan features, read our guide: Compare mortgage features in 2026.
Also see: Fixed vs variable in 2026: which is right for you?
And: Refinance break-even analysis for 2026