Fixed vs Variable Home Loans: What Australian Families Should Know

Short answer

There's no single right answer. Most Australian families do best with a split loan — fixing part of their mortgage for certainty and keeping the rest variable for flexibility. But the right mix depends on how tight your budget is and how much risk you can handle.

If you've got a mortgage (or you're about to get one), you've probably stared at the fixed vs variable decision and felt stuck. Both sides have loud advocates. Your mate who fixed at 1.99% during COVID thinks it's the only way. Your colleague who broke a fixed loan and paid a $5,000 fee swears she'll never do it again.

The truth is, neither option is always better. It depends on your family's situation — and on what the RBA does next, which nobody can predict perfectly.

How fixed and variable rates actually differ

At the simplest level:

• Fixed rate: Your interest rate is locked for a set period (usually 1, 2, or 3 years). Your repayments stay the same no matter what the RBA does.
• Variable rate: Your rate moves with the market. When the RBA cuts the cash rate, your lender might pass on some (or all) of the savings. When the RBA hikes, your repayments go up.

But there's more to it than that.

The case for fixing: when certainty matters more than savings

Fixing is ideal when your family budget doesn't have much wiggle room. If you've got two kids in childcare, one parent working part-time, and every dollar is spoken for, knowing exactly what your mortgage will cost for the next two years is valuable.

Take Sarah and Tom. They have a $620,000 mortgage and two kids under five. Sarah works four days a week, Tom works full-time. Their budget is tight — they're saving about $200 a month after everything is paid. If variable rates jumped by even 0.50%, they'd be in negative cash flow. For them, fixing $400,000 of their loan at 5.79% for two years gives them breathing room. The remaining $220,000 stays variable so they can still use an offset account and make extra repayments when they can.

The case for variable: flexibility can save you money over time

Variable rates are usually lower than fixed rates at the start — banks price fixed loans with a premium because they're taking on the interest rate risk for you. Plus, variable loans come with offset accounts and unlimited extra repayments, which can shave years off your loan.

For families with a solid emergency fund and some buffer in the monthly budget, variable often wins over the long run. You'll ride the rate cycles — paying more when rates rise, paying less when they fall — but historically, variable borrowers have come out ahead more often than not.

The middle ground: why split loans work so well for families

This is where most families land, and for good reason. A split loan lets you fix part of your mortgage (say, 50% or 60%) and keep the rest variable. You get:

• Certainty on the fixed portion — you know those repayments won't move
• Flexibility on the variable portion — offset account, extra repayments, and potential rate-cut savings
• Less risk than going all-in on either option

Here's what a 60/40 split might look like on a $600,000 loan:

If variable rates drop by 0.50% over the next year, your variable portion drops by about $75 a month. If they rise by 0.50%, it goes up by the same amount. Either way, more than half your loan is protected.

What the RBA is doing right now (and why it matters)

As of mid-2026, the RBA cash rate sits at 3.85%, down from its peak of 4.35%. Most economists expect one or two more cuts over the next 12 months, but nobody really knows — a surprise inflation reading could pause everything.

This is exactly the kind of uncertain environment where split loans shine. If you go all-variable, you might benefit from future cuts — but if the RBA pauses or reverses, you're exposed. If you go all-fixed, you lock in today's rate and miss any cuts. A split loan lets you participate in both scenarios, just to a lesser degree on each side.

How to decide: 3 questions to ask yourself

1. How tight is your monthly budget? If a $200 increase in repayments would cause real stress, fix a larger share.
2. Do you have an offset account? If yes, you probably want at least some of your loan variable so you can use it.
3. Are you planning to sell or refinance in the next 2 years? If yes, a break fee on a fixed loan could sting — keep more variable.

No rate structure is perfect forever. What matters is picking something that lets your family sleep at night while keeping your options open. For most families with young kids, that's a split loan — not because it's the cheapest option (it usually isn't), but because it's the one that balances certainty with flexibility. And when you're juggling daycare fees, school costs, and everything else, that balance is worth more than squeezing out the last 0.10%.