Calculator methodology
Refinance Break-Even Calculator: Methodology
The calculator compares estimated interest over a chosen holding period and subtracts net switching costs. It separately tests whether a longer replacement term raises lifetime financing cost.
Calculation approach
- Monthly repayments use standard amortisation maths.
- Break-even accumulates the monthly interest difference after net switching costs.
- Cashback is treated as a reduction in switching cost, not as interest savings.
What the calculator deliberately does not decide
The calculator does not select a lender, predict approval, expose lender policy or provide personal financial or tax advice. It is a transparent comparison tool so you can test structure before seeking a quote.
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Use the enquiry form for an initial broker review. No lender application is made just by enquiring.
Compare my finance optionsSources and verification
- Moneysmart — Switching home loans
- Moneysmart — Mortgage offset accounts
- APRA — Macroprudential policy settings
General information only. It is not personal financial, tax or legal advice. Finance approval, pricing and structure are subject to lender assessment and your circumstances.