Enter your loan, rate, term, and current offset balance. We'll estimate your monthly repayment and — using a proper month-by-month simulation — show how much interest and how many years the offset saves you.
Your loan
The average balance you keep in a 100% offset linked to this loan.
Your numbers
Estimated monthly repayment
$3,939
Same repayment applies whether or not you use the offset — that's the whole point.
$116,762
Over the full term of the loan.
2y 5m
Compared to a $0 offset.
Without offset: total interest $768,028
With your offset: total interest $651,266
Estimate only — assumes a constant interest rate over the life of the loan, a constant average offset balance, and standard P&I repayments. Real repayments will vary with your specific product, rate changes, fees, and your actual daily offset balance. Talk to your broker before making a decision.
Want to see whether a real refinance would deliver more than the offset saves you? Get a complimentary Equity Snapshot.
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Your scheduled monthly repayment on a principal-and-interest home loan doesn't change based on your offset balance — you always pay the same amount. What changes is the split between interest and principal. When you have money in an offset account linked to your loan, the lender only charges interest on the loan balance minus your offset. That means more of every repayment goes to paying down the loan itself. The compounding effect over a 25–30 year term is significant.
When to use it
- You're deciding whether keeping $20k–$100k+ in an offset actually saves you real money versus other uses of the cash.
- You're comparing two loan products where one has an offset and one doesn't — the calculator shows the interest-saving value in dollars.
- You're considering paying a lump sum into your loan versus keeping it accessible in an offset — the offset simulation quantifies the trade-off.
What the result actually means
- The monthly repayment is what the lender debits from your account each month — treat it as your minimum obligation.
- 'Interest saved by offset' is real cash you keep over the term. On typical loans, an offset balance sitting at ~$25k saves 5-7 figures in interest.
- 'Loan paid off earlier by' assumes you keep the offset balance stable and don't reduce your repayments — the offset shaves years off the term automatically.
What it doesn't tell you
- This is a simulation of one constant rate and one constant offset balance. In reality both change — repayments generally re-price when rates move.
- Fees are not modelled. A loan with a strong offset often has a higher rate or an annual package fee; sometimes the offset value doesn't beat a sharper no-offset loan.
- Redraw is not the same as offset — redraw is taxable interest that has already been paid, and cannot be simply withdrawn without changing the loan structure.
Sensible next steps
- Compare the interest saved by offset against the annual package fee your product charges — if the fee is bigger, the offset isn't paying for itself.
- Get a complimentary Equity Snapshot and we'll benchmark your loan against 60+ lenders including offset vs no-offset alternatives.
Important — General Information Only
This information is general in nature and does not take into account your personal objectives, financial situation or needs. It is not personal advice, credit advice, tax advice or legal advice, and is not a recommendation to enter into, refinance, or remain in any particular credit contract. Any figures, calculations, or projections shown are simplified examples for illustration only — they are not guarantees or forecasts, and actual outcomes will vary based on your circumstances and the lender's assessment.
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