Split Loan Calculator
Split Loan Calculator See What a Fixed and Variable Split Costs
This split loan calculator estimates your repayments when you divide a home loan between a fixed portion and a variable portion, each carrying its own interest rate. Enter your loan amount, the percentage you’d fix, the fixed period and rate, the variable rate, loan term, and repayment frequency, and it returns your fixed and variable monthly repayments, total repayments, and total interest payable.
It also compares that total interest against what the same loan would cost if it ran entirely on the variable rate, so you can see whether locking in part of the loan actually makes a difference to the total cost. Output is an estimate based on your inputs, not a loan offer.
Why Splitting a Loan Is About Risk, Not Just Rate
A split loan lets you fix part of your repayment so it stays predictable regardless of rate movements, while the variable portion still lets you make extra repayments or use an offset account without restriction. The fixed portion protects against rate rises during the fixed period, while the variable portion keeps some flexibility that a fully fixed loan doesn’t offer.
Whether a split loan saves money compared with a fully variable loan depends entirely on where rates move during the fixed period, something no calculator can predict with certainty.
What this split loan calculator does show clearly is the repayment structure itself, on a $250,000 loan split 60 percent fixed and 40 percent variable, the fixed and variable repayments combine into one monthly figure that stays the same before and after the fixed period ends, since the variable portion adjusts to fill the gap. That predictability, not a guaranteed saving, is usually the real reason borrowers choose to split.
How to Use the Calculator
You’ll need the loan details you’re considering or currently have:
Loan amount and loan term
Fixed portion, as a percentage of the total loan
Fixed period, in years, and fixed interest rate
Variable interest rate
Repayment frequency
The split loan calculator returns your fixed and variable monthly repayments, total repayments before and after the fixed period ends, total interest payable, and a comparison against the same loan held entirely at the variable rate. Run it with different fixed percentages to see how the split changes your monthly repayment and total interest.
How ADA Financial Services Helps
A split loan calculator shows the repayment structure on a given split. A broker looks at what percentage split actually suits your situation, based on how much rate certainty you want against how much flexibility you need for extra repayments or an offset account.
ADA Financial Services compares split loan structures across our lender panel, and helps you weigh the fixed portion against your appetite for rate risk and your need for flexibility. Our fee is paid by the lender at settlement in most standard cases, disclosed in writing before any application proceeds. We’re based on the Sunshine Coast and work with borrowers across Northern Australia.
Considering a split loan and want to see what it means for your repayments?
Speak with an ADA Financial Services specialist about your loan structure. We model the split that suits your situation and give you a clear, honest answer on what fits.
This is general information only and does not constitute financial or credit advice. Speak to a licensed broker for advice tailored to your situation.
FAQs
Why would I split my loan instead of choosing fully fixed or fully variable?
A split gives you rate certainty on part of the loan while keeping flexibility, such as extra repayments or an offset account, on the remainder. It’s a middle ground between the two extremes.
What percentage split is most common?
There’s no standard split, it depends on how much rate certainty you want. A 50/50 or 60/40 split toward fixed is common among borrowers wanting a balance of predictability and flexibility.
Can I change my split after settling on one?
Generally yes, though changing the fixed portion before the fixed period ends can trigger break costs. Adjusting the split is usually easier once the fixed period expires.
Does splitting my loan guarantee I'll save money compared with a fully variable loan?
No. Whether a split saves money depends on how rates move during the fixed period, which can’t be predicted with certainty. The main benefit is repayment predictability, not a guaranteed saving.
What This Loan Repayment Calculator Shows
This loan repayment calculator estimates what you will pay each month on a home loan, how much of that payment goes to interest versus principal, and the total interest charged across the full term. You enter your loan amount, interest rate, term, and repayment frequency. The output gives you a clean repayment figure to plan around and a total cost number that most borrowers underestimate.
The estimate is based on the inputs you provide and assumes a standard principal and interest loan with a constant interest rate. Real loans vary as rates move and fees apply. Treat the output as a planning figure, not a loan offer.
What This Loan Repayment Calculator Shows
This loan repayment calculator estimates what you will pay each month on a home loan, how much of that payment goes to interest versus principal, and the total interest charged across the full term. You enter your loan amount, interest rate, term, and repayment frequency. The output gives you a clean repayment figure to plan around and a total cost number that most borrowers underestimate.
The estimate is based on the inputs you provide and assumes a standard principal and interest loan with a constant interest rate. Real loans vary as rates move and fees apply. Treat the output as a planning figure, not a loan offer.