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Refinancing / Loan Structure

Fixed or Variable When You Refinance? 

A Structure-First Way to Decide

Most comparisons of fixed and variable rates start and end with the number.

 

The more useful question is what you actually need the loan to do for you over the next few years — because that answer usually points to the right structure faster than rate-watching ever will.

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What Variable Actually Gives You

A variable rate moves with the market, up or down — but the real value for most established homeowners isn't the rate itself, it's what comes attached to it: unlimited extra repayments, a 100% offset account, and redraw.

If your strategy involves paying the loan down faster or parking surplus cash flow against the balance, variable is usually where that flexibility lives.

What Fixed Actually Gives You

A fixed rate gives you certainty — your repayment stays the same regardless of what the market does, which makes budgeting predictable.

The trade-off is that most fixed loans cap or remove extra repayments, and rarely come with a full offset account. If you break a fixed loan early, break costs can apply and are calculated based on how far rates have moved since you fixed.

Fixed suits a specific situation well: certainty matters more to you right now than flexibility, and you're confident you won't need to access extra funds or make large lump-sum repayments during the fixed term.

The Split Option Most People Overlook

You don't have to choose one or the other for the entire loan. Splitting the loan — part fixed, part variable — lets you lock in certainty on a portion while keeping offset and extra repayment flexibility on the rest.

This tends to suit established homeowners well, particularly those with irregular surplus cash flow (bonuses, overtime, seasonal income) who still want some protection against rate movements.

  • Fix the portion you'd never touch. If part of your loan is essentially untouchable debt you're just paying down on schedule, fixing it locks in certainty without costing you flexibility you weren't using anyway.
  • Keep a variable portion for offset and extra repayments. This is where surplus cash flow should sit - reducing interest immediately rather than waiting for a fixed term to end.
  • Match the split to your actual behaviour, not a rule of thumb. A 50/50 split isn't automatically right — it depends on how much of your surplus cash flow you realistically expect to direct at the loan.

The Question to Ask Before Deciding

Rather than "what will rates do next," the more useful question is: over the fixed term you're considering, how likely is it that you'll want to make extra repayments, redraw funds, or refinance again?

If the answer is "fairly likely," that's a strong signal toward variable or a split structure — regardless of which rate looks slightly better today.

Work Out the Right Structure for Your Situation

The right fixed/variable mix depends on your cash flow pattern and goals — not a generic rule. A structure review can map out what actually fits.

Read the Full Refinancing Guide
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