Break costs — also called economic costs or prepayment costs — are charged by Australian lenders when you exit a fixed rate home loan before the fixed period ends. They compensate the lender for the financial loss caused by the early repayment. They can range from zero (if current rates are higher than your fixed rate) to tens of thousands of dollars (if current rates have fallen significantly since you fixed). Understanding how they work is essential before making any decision to refinance or sell a property during a fixed rate period.
What Break Costs Are and Why Lenders Charge Them
When a lender offers you a fixed interest rate, they typically hedge that rate in wholesale money markets — locking in a wholesale funding cost to match your fixed rate loan. If you repay the loan early, the lender is left holding a wholesale funding arrangement that no longer has a matching loan. If wholesale rates have fallen in the interim, the lender cannot redeploy the funds at the original rate — creating a loss that they pass to you as the break cost.
Importantly, break costs are not a penalty or a fee in the traditional sense — they are an economic cost that the lender has actually incurred. They are calculated using a specific formula set by the Reserve Bank of Australia's wholesale rate benchmarks. In rising rate environments — such as 2022–2023 — break costs were near zero or zero, because lenders could redeploy funds at higher rates. In falling rate environments, break costs can be significant.
How Break Costs Are Calculated in Australia
The exact break cost formula varies by lender, but the general principle is: break cost = loan balance × (fixed rate − current wholesale rate for remaining term) × remaining term in years. If your fixed rate is 5.5% and the current wholesale rate for the remaining two-year term is 4.8%, the rate differential is 0.7%. On a $500,000 balance with two years remaining, the break cost would be approximately $500,000 × 0.7% × 2 = $7,000 — though the exact figure depends on the lender's specific methodology.
Break costs are not published — you must request a specific break cost estimate from your lender in writing. The estimate is typically valid for five to seven days (because the underlying wholesale rate changes daily). Always get a written break cost estimate before making any decision — the actual cost can be very different from what you expect.
Get Your Break Cost Estimate in Writing
Do not rely on over-the-phone break cost estimates — always request a written calculation from your lender. The estimate is valid for a specific date and should clearly state the calculation methodology. Your broker can obtain this from the lender on your behalf.
When Breaking a Fixed Loan Early Is Still Worth Considering
Breaking a fixed rate loan is worth analysing when: the interest saving from moving to a lower variable rate exceeds the break cost over a reasonable payoff period; your property is being sold (you cannot carry a fixed loan to a new property without porting, which not all lenders allow); or a significantly better fixed rate becomes available and the new rate saving over the remaining term exceeds the break cost.
The break-even analysis is straightforward: divide the break cost by the monthly interest saving on the new loan. If the break cost is $8,000 and the monthly saving is $400, the break-even is 20 months. If you intend to hold the loan for at least 20 months after refinancing, the break is financially beneficial in total interest saved. Your broker can model this precisely.
| Break Cost | Monthly Interest Saving | Break-Even Period |
|---|---|---|
| $3,000 | $200 | 15 months |
| $5,000 | $350 | 14 months |
| $8,000 | $400 | 20 months |
| $15,000 | $500 | 30 months |
| $25,000 | $600 | 41 months |
Frequently Asked Questions
About the Author
Sakib Manzoor
Senior Finance Wellness Expert
Sakib Manzoor is the founder of Secure Finance and brings extensive experience in Australian mortgage broking and financial wellness. Specialising in helping clients achieve their property finance goals through personalised strategies and expert guidance, Sakib is FBAA accredited and committed to providing clear, actionable advice. All content is written to meet Australian regulatory standards and is regularly updated to reflect current market conditions.