Split Loan Calculator – Combine Fixed & Variable to Get the Best of Both Worlds
Not sure whether to go with a fixed or variable interest rate? Why not do both?
A split loan lets you divide your loan into two parts — one fixed, one variable — so you can balance certainty and flexibility.
Our Split Loan Calculator helps you estimate your repayments and total interest payable when you split your loan — whether you’re buying your first home, growing your investment portfolio, or financing a commercial property.
How to Use the Split Loan Calculator
1. Enter the Total Loan Amount
- This is the full loan you’re applying for or already have (e.g. $600,000)
2. Choose the Split Percentage
- Decide how much of your loan will be fixed vs variable.
- Example: 60% fixed ($360,000), 40% variable ($240,000)
3. Input Interest Rates for Each Portion
- Enter the fixed rate and the variable rate you’re being offered.
- Example: 5.90% fixed, 6.30% variable
4. Select the Loan Term
- Typically 25 to 30 years
5. Choose Repayment Frequency
- Weekly, fortnightly, or monthly
6. Click ‘Calculate’
- The calculator will show your combined repayment amount and total interest payable over the life of the loan.
Why Choose a Split Loan?
- Lock in a fixed rate to protect against rate hikes
- Keep flexibility to make extra repayments or use an offset account
- Create a custom structure that fits your financial goals
Perfect for Home Buyers
Split loans can provide repayment stability on the fixed portion while allowing extra repayments or offset access on the variable side.
Great for Property Investors
Manage interest rate risk while still maintaining the flexibility to leverage equity and make strategic repayments.
Useful for Commercial Loans
Balance long-term cash flow stability with the flexibility to adapt to changing business needs.
Example:
- Total loan: $600,000
- Split: 50% fixed, 50% variable
- Rates: 5.90% fixed, 6.30% variable
- Term: 30 years
- Monthly repayment: $3,585
- Interest savings: Compare different splits to find the best balance for your goals
Try the Split Loan Calculator Now
Use our Split Loan Calculator to compare different combinations of fixed and variable, and find the right loan structure for your needs – whether it’s a home loan, investment loan, or commercial loan.