Fixed vs variable home loans: how to actually choose

“Should I fix?” might be the most common question a mortgage broker hears — usually asked as if it were a prediction question about where rates are heading. Here’s the uncomfortable truth: nobody reliably predicts rate movements, including the banks setting them. The good news is you don’t need to. The fixed-versus-variable decision is really about your plans and your tolerance for uncertainty, and those you know.

What a variable loan gives you

A variable rate moves with the market — up and down. In exchange for that uncertainty you typically get flexibility:

• Unlimited extra repayments, which shorten your loan and cut total interest.
• Full offset accounts — your savings reduce the interest calculated daily.
• Redraw on extra repayments if you need the money back.
• No break costs if you sell, refinance or restructure.

Variable suits borrowers who value flexibility, expect to make extra repayments, or may sell or refinance within a few years.

What a fixed loan gives you

Fixing locks your rate — and therefore your repayment — for a set term, usually one to five years. You’re buying certainty:

• Your repayment can’t rise during the term, whatever the market does.
• Budgeting is simple, which matters on a single income or a tight margin.

The trade-offs are real, though:

• Extra repayments are usually capped during the fixed term.
• Offset accounts are often unavailable or only partial.
• Break costs can apply if you exit early — selling, refinancing, even some restructures. These can run to thousands and vary daily with market movements.
• When the term ends, you roll to a revert rate that’s rarely competitive — a review at that point is essential.

The split option

You don’t have to choose one. A split loan fixes part of the balance and leaves the rest variable — certainty on the bulk of the repayment, flexibility (and an offset) on the remainder. The right proportions depend on your savings pattern and plans; there’s nothing magic about 50/50.

Questions that actually decide it

1. Could you handle your repayment rising meaningfully? If a rise would genuinely strain the budget, certainty has real value.
2. Are you likely to sell or refinance within the term? If yes, fixing risks break costs.
3. Do you hold significant savings? An offset against a variable loan may save more than a slightly lower fixed rate.
4. Do you make extra repayments? Caps on fixed loans can cost you the habit that pays a loan off early.

The takeaway

Fixed vs variable isn’t a bet you win by predicting rates — it’s a structure you choose to fit your life. Get the structure right and either rate environment is survivable; get it wrong and even a “winning” rate can cost you flexibility when you need it most.

This article is general information only and doesn’t consider your personal circumstances. Rates, features and break cost methods vary by lender.