Fixed vs variable home loan rates: a decision framework

The fixed-versus-variable question is usually asked as a forecast — “will rates go up or down?” — but that is the one framing nobody can answer reliably. Asked properly, it is a question about loan structure. A fixed rate stays the same for a set period (for example, five years), which Moneysmart notes makes budgeting easier because you know what your repayments will be. A variable rate can move as the lending market changes — for example when official cash rates change — which makes budgeting harder but usually brings more features and makes it easier to switch loans later.

Each structure has a cost profile. Moneysmart’s stated trade-offs for fixing: you will not get the benefit if interest rates go down, switching later may cost more if you are charged a break fee, and you may not be able to make extra repayments. For variable: repayments can rise as well as fall, and more loan features can cost more. Neither structure is inherently better — the fit depends on your budget, your plans over the period, and the specific product’s terms.

The feature gap deserves a closer look, because it compounds daily. A mortgage offset account is a transaction account linked to your home loan — generally available with a variable rate loan, per Moneysmart. Interest on most home loans is calculated daily, and each day the lender subtracts the offset balance from the loan balance before calculating interest: with a $500,000 loan and $20,000 in offset, interest is charged on $480,000. A redraw facility works differently — extra repayments go straight onto the loan, and you may be able to withdraw them later, depending on the loan terms. Our guide to offset, redraw and tax and our loan features explainer cover the distinction in detail.

As at 12 July 2026, the RBA cash rate target is 4.35%. The Monetary Policy Board — which meets eight times a year — raised the target three times in 2026 before leaving it unchanged at its 16 June 2026 meeting.

Two cautions before this history is put to work. First, past movements are exactly that — history. They tell you nothing reliable about the next decision, and this resource makes no prediction. Second, Moneysmart notes the cash rate is not the only driver of the rate you are charged: your creditworthiness, your value as a customer and competition between lenders all play a part. Moneysmart also notes there can be an interest rate difference of more than 2% between variable home loan rates on the market — worth checking from time to time, whichever structure you choose.

If one fact should anchor the decision, it is this: the exit paths from the two structures are not symmetrical. ASIC Regulatory Guide 220 explains that lenders charge break fees to recover the economic cost of a customer terminating a fixed rate loan before the end of the fixed term — and that a break fee is not charged for variable rate loans. Moneysmart’s glossary adds the practical warning: the fee may be very high, and generally the more interest rates have come down since you took the fixed rate, the higher it will be. Refinancing, repaying the loan, or making extra repayments beyond what the contract allows can each trigger it.

RG 220 describes the usual calculation: the difference between your fixed rate and the prevailing rate at the date of early termination, over the remaining fixed term. It follows that a borrower breaking a fixed loan whose rate is lower than the prevailing rate will pay a lower — possibly nil — break fee. And the widely remembered “exit fee ban” does not help here: reg 79A of the National Consumer Credit Protection Regulations 2010 prohibits termination fees for residential-secured credit contracts entered into on or after 1 July 2011, but the prohibition expressly does not apply to break fees or discharge fees.

The law does constrain the amount. Under s78 of the National Credit Code, a fee payable on early termination or prepayment is unconscionable if a court determines it exceeds a reasonable estimate of the lender’s loss (including average reasonable administrative costs), and a court may annul or reduce such a fee. AFCA’s factsheet on breaking a fixed rate loan explains that for Code-regulated complaints about the amount charged, AFCA makes its own estimate of the lender’s loss — comparing wholesale market (swap) rates for the original and remaining terms and allowing for the amount repaid, the remaining term, the contracted repayments and the time value of money. Repaying the loan does not prevent you lodging a complaint, and amounts incorrectly charged must be refunded.

A decision like this is exactly what credit assistance is for. Moneysmart confirms that mortgage brokers must act in your best interests when suggesting a loan — the best interests duty under the National Consumer Credit Protection Act — and must give you information about the commissions they may receive. If a broker charges you a fee directly, the proposed fee must be set out in a written quote you sign before services are provided. In most residential lending scenarios, the lender pays broker commission. We explain remuneration in our Credit Guide.

If something goes wrong with a lender or broker — including a dispute about how a break cost was calculated — raise it through the firm’s internal complaints process first. If it is not resolved, you can complain to AFCA, whose dispute resolution Moneysmart describes as free for consumers. For structured help weighing a fix, a split or a switch, see our refinancing service or talk to our refinance mortgage broker team.