Fixed, variable or split: how home loan rate types work in Australia

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Kooky

Builder of Shaka, the payment router that pays every agent their commission on closing date.

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Every home loan in Australia charges interest in one of three ways. The rate can be variable, moving up and down over the life of the loan. It can be fixed for a set period and then become variable. Or the loan can be split, with part of the debt on each. The choice is made when the loan is taken out and can be revisited whenever it is refinanced or a fixed term ends.

It is one of the larger financial decisions a Queensland household makes, and it tends to be made quickly, late in the process of buying, with the contract already signed and settlement approaching. It also has no answer that is right for everyone, because the outcome depends on what interest rates do next, which nobody knows.

What can be known is how each type works: who sets the rate and why it moves, what a fixed rate restricts, what it costs to leave one early, what happens when the term ends, and how a split loan divides the risk. That is what this guide covers. It is a description of the mechanics, not advice about which to choose.

Moneysmart (Australian Securities and Investments Commission) guidance on fixed and variable rates; Reserve Bank of Australia decision of 16 June 2026.

How a variable rate works

A variable rate is one the lender can change. Moneysmart, the consumer site run by the Australian Securities and Investments Commission, describes it simply: the lender decides when the rate changes and by how much, and repayments rise or fall with it over the life of the loan.

The largest influence on that decision is the Reserve Bank's cash rate. The Reserve Bank's explainer on monetary policy describes the cash rate as the interest rate on overnight loans between financial institutions, with a strong influence over other interest rates, including the deposit and lending rates that households pay and receive. When the cash rate changes, the cost of money to a bank changes, and banks generally move their variable rates to match. The Reserve Bank calls this the cash-flow channel of policy: a change in rates alters the repayments of households with variable-rate mortgages and therefore the money they have left to spend.

The link is close but not automatic. A lender is free to move a variable rate at any time, by any amount, for its own reasons. A change made between Reserve Bank decisions is called an out-of-cycle move. Canstar counted eleven lenders that cut at least one variable rate in the six weeks to 11 June 2026, a period in which the cash rate did not fall.

Two features of variable pricing are easy to miss.

The first is that a lender has many variable rates, not one. Each product has its own, and within a product the rate often depends on the size of the deposit, whether the borrower lives in the home or rents it out, and whether repayments are principal and interest or interest only. A borrower with 30 per cent equity is usually offered a lower rate than one with 10 per cent.

The second is that new customers are often offered less than existing ones. Lenders compete for new loans on the advertised rate, and a borrower who took a loan years ago may be on a higher rate for the same product. Canstar's data insights director, Sally Tindall, made the point when publishing the June figures: the sharpest variable rates exist, but a borrower may have to become a new customer to get one. Canstar put the average owner-occupier variable rate at 6.26 per cent on 11 June 2026 and the lowest at 5.69 per cent.

What a variable rate allows

The appeal of a variable loan is flexibility. Moneysmart lists the usual advantages: repayments fall if rates fall, extra repayments are typically allowed, features such as offset accounts and redraw are commonly available, and refinancing or switching is generally easier.

Those features are how many households get ahead on a loan. Extra repayments reduce the balance directly. An offset account lets savings reduce the interest charged while staying available. Both depend on the loan being variable, or at least on part of it being so.

The cost is uncertainty. Repayments can rise at short notice, and a household's budget has to absorb it. Three increases in the cash rate between February and May 2026 added 0.75 of a percentage point to variable rates in four months. Canstar estimates that each quarter-point adds about $92 a month to repayments on a $600,000 loan.

Moneysmart suggests asking a lender four things about a variable loan: how much repayments could rise if rates went up sharply, how much notice the lender gives of a change, whether extra repayments can be made without penalty, and whether offset and redraw are available.

How a fixed rate works

A fixed rate stays the same for a set period, which Moneysmart says is usually between one and five years. During that time the repayment does not change, whatever the Reserve Bank or the lender does.

The term is not the life of the loan. An Australian fixed-rate home loan is typically a 25 or 30-year loan with a fixed rate for the first few years. When the fixed period ends the loan carries on, at a different rate.

Fixed rates are priced differently from variable ones. To promise a rate for three years, a lender has to fund the loan for three years, and what that costs depends on where financial markets expect interest rates to be over the period. This is why fixed rates can move when the cash rate has not, and why they sometimes fall while variable rates are rising. A fixed rate below the variable rate usually signals that markets expect rates to come down; a fixed rate above it signals the opposite.

Lenders can also disagree with each other. In the week after the Reserve Bank held the cash rate at 4.35 per cent on 16 June 2026, Savings.com.au reported that Bank Australia and Qudos Bank had lifted their fixed rates by 10 basis points while Hume Bank cut three-year fixed rates for investors by up to 60 basis points. Earlier in the month the same site reported ANZ trimming some fixed rates by 5 to 10 basis points as Westpac lifted its own by 5.

The advantages, as Moneysmart lists them, are predictable repayments, easier budgeting and protection from rate rises during the term.

What a fixed rate restricts

Certainty is paid for with flexibility. Moneysmart names three disadvantages of fixing.

The borrower gets no benefit if rates fall. The rate was agreed at the start and the lender is entitled to it for the term.

Some fixed loans restrict extra repayments. Many lenders allow a limited amount of extra repayment each year on a fixed loan and charge if the limit is exceeded; others allow none. The limit differs by lender and should be read in the loan offer.

Fixed loans often have fewer features. An offset account is far more commonly attached to a variable loan. Where a lender does offer an offset on a fixed loan, it may be a partial one. A household that keeps substantial savings can lose more in forgone offset benefit than it gains from a slightly lower fixed rate.

There is also a timing question at the start. A fixed rate quoted at application is not always the rate that applies at settlement, which may be weeks later. Lenders differ on whether and how a quoted rate can be held in the meantime, sometimes for a fee, and it is worth asking how the lender handles a rate change between approval and settlement.

Break costs and why they exist

The restriction that surprises borrowers most is the cost of leaving. Moneysmart warns that penalties can apply if a borrower refinances, sells or repays a fixed loan early, and lists a break fee among the costs to check before switching lenders.

The logic comes from how the loan was funded. When a lender fixes a rate, it arranges funding for the term at the cost prevailing then. If the borrower leaves early and rates have fallen since, the lender can only relend that money at a lower rate, and the break cost recovers its loss. If rates have risen since, the lender loses nothing by being repaid, and the break cost can be small or nil.

In practice this means break costs are largest exactly when a borrower most wants to leave: after rates have fallen. They also grow with the size of the loan and the time left on the term. They cannot be known in advance, because they depend on rates on the day the loan is broken, but a lender can explain its method and give an estimate on request at any time.

The situations that trigger a break cost are wider than refinancing. Selling the home during the term breaks the loan unless the lender allows it to be moved to a new property. So can paying it out with an inheritance, or making extra repayments beyond the permitted amount.

What happens when the fixed term ends

At the end of the fixed period the loan does not end. Moneysmart explains that it typically moves to the lender's variable rate, known as the revert rate, unless the borrower refinances or agrees another fixed period.

The revert rate is not necessarily the lender's best variable rate. It can be a standard rate without the discounts offered to new customers, which is why the end of a fixed term is a natural moment to review the loan. It is also the one point at which a fixed-rate borrower can leave without a break cost.

If rates have risen during the term, the repayment can jump on the day the term ends. A borrower who fixed when rates were low and rolls off when they are high faces the whole increase at once instead of in steps.

Moneysmart's three questions for anyone taking a fixed rate all concern this moment: what the revert rate will be, how much repayments could increase when the term ends, and what fees would apply to refinancing.

Split loans

A split loan divides the debt in two. One part has a fixed rate and the other a variable rate. Moneysmart notes that the borrower chooses the proportions, for example half and half, or 20 per cent fixed and 80 per cent variable.

The purpose is to hedge. The fixed part is protected if rates rise. The variable part benefits if rates fall and keeps the features that fixed loans restrict. A borrower can direct all extra repayments to the variable part and link an offset account to it, while knowing that part of the repayment will not move.

A split is a compromise in both directions. If rates rise, the borrower is worse off than if the whole loan had been fixed. If rates fall, worse off than if it had all been variable. What the split buys is a smaller swing either way.

The cost is complexity. Moneysmart points out that each part has its own rate, fees, features and conditions. In effect there are two loans to watch, and the fixed part carries its own break cost and its own expiry date.

A worked comparison

The example below shows how the three structures respond to a change in rates. It is illustrative. It uses a $600,000 principal and interest loan over 30 years, a variable rate of 6.26 per cent, which was Canstar's average for owner-occupiers on 11 June 2026, and a fixed rate of 5.99 per cent, the lowest one-year fixed rate Canstar listed that day. It then asks what the monthly repayment would be if the variable rate rose or fell by half a percentage point. The split is half fixed and half variable.

The all-variable loan swings by about $198 a month upward and $193 downward. The split loan swings by about $99 upward and $96 downward, half as much, because only half the debt is exposed. The fixed loan does not move during its term.

The table leaves out what happens afterwards. When the fixed term ends, the fixed loan moves to whatever the variable rate then is. Fixing for a year postpones exposure to rate changes by a year; it does not remove it. The table also leaves out the value of an offset account or extra repayments, which only the variable and split structures fully allow.

Comparing loans of the same type

Choosing a rate type is one decision. Choosing between two loans of that type is another, and the advertised rate is only part of it.

Moneysmart directs borrowers to the comparison rate, a single figure that combines the interest rate with most fees. A loan with a low headline rate and a high annual fee can have a higher comparison rate than a plainer loan. It also suggests separating the features that are essential from those that are merely attractive, because features can add cost.

Lenders must provide a key facts sheet on request, which sets out the rate, the comparison rate, the total to be repaid, the repayment amount and the fees in a standard format, so that two loans can be laid side by side.

Small differences compound. Moneysmart notes that a rate even half a percentage point lower can save thousands of dollars over time, and that variable rates on the market can differ by more than 2 percentage points. In June 2026 the gap between Canstar's average and lowest owner-occupier variable rates was 0.57 of a point.

Questions that settle most of the choice

No rule decides between fixed, variable and split. A few questions do most of the work, and their answers are particular to each household.

How tight is the budget? A household that could not absorb a rise in repayments has more to gain from certainty. Moneysmart's suggestion is to work out repayments at a rate 3 percentage points higher and see whether the budget holds.

How likely is a sale or a large repayment in the next few years? A planned move, an expected inheritance or a separation all make a break cost more likely.

How much is kept in savings? A household with a large balance in an offset account gets a benefit that many fixed loans do not allow.

What happens at the end of the term? A fixed rate is a short promise inside a long loan, and the rate that follows matters as much as the one on offer today.

And what is being assumed about rates? In June 2026 the four major banks' economists disagreed about whether the next move in the cash rate would be up or down. A choice that only works if one of them is right is a forecast, whatever it is called.

A fixed rate buys a known repayment for a few years and a variable rate buys flexibility. A split buys some of each, and the right mix depends on the household more than on the market.

Kooky, from Shaka

Kooky edits Queensland Estate and builds Shaka, the payment router he made for Queensland property professionals. One payment comes in, and every agent, agency and party in the deal receives their signed share on closing date.

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