When Switching from Variable to Fixed Makes Sense
A switch from variable to fixed rate makes sense when you want rate certainty and protection from further increases. If your budget can't absorb additional rate rises, or you're planning around fixed expenses over the next few years, locking in a rate removes that uncertainty.
The decision depends on where rates are heading and how long you want that certainty. If the Reserve Bank signals further increases and fixed rates haven't fully priced those in yet, you may lock in below where variable rates will sit in six or twelve months. If fixed rates are already higher than current variable rates, you're paying a premium for certainty rather than saving on interest.
In our experience, clients who refinance to fixed often do so after several rate increases have already occurred. By that point, fixed rates have usually adjusted upward as well. The window where fixed rates are meaningfully lower than variable rates tends to be narrow, and it closes quickly once the market anticipates what's coming.
The Break Cost Problem Most Borrowers Miss
If you're currently on a variable rate, you typically won't face break costs when switching to fixed. Break costs apply when you exit a fixed rate loan early, not when you leave a variable rate loan. This is one reason refinancing from variable to fixed is more straightforward than the reverse.
Consider a borrower in South Perth who refinanced from variable to fixed at 5.8% last year. Six months later, they wanted to sell and found themselves facing a break cost of over $12,000. They'd locked in certainty, but they'd also locked themselves into a contract. The lender calculates break costs based on the difference between your fixed rate and the rate they can now lend that money at, multiplied across the remaining fixed period. The larger the rate gap and the longer the remaining term, the higher the cost.
If there's any chance you'll sell, pay down a large sum, or refinance again within the fixed period, that lack of flexibility has a dollar value. Some lenders allow partial extra repayments up to a certain limit during a fixed term, but most don't let you walk away without a cost.
How Application Timing Affects the Rate You Lock In
Rate locks typically last between 90 and 120 days depending on the lender. If you apply to refinance to a fixed rate and the lender approves your loan, the rate you're offered is the rate available on the day the loan is formally approved, not the day you submitted your application. If fixed rates increase between application and approval, you may end up with a higher rate than you expected.
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Some lenders allow you to lock in a rate once formal approval is granted, which protects you if rates rise before settlement. Others don't offer this option, and the rate is only confirmed at settlement. If you're refinancing specifically to lock in a fixed rate, confirm the lender's rate lock policy before proceeding. A delay in valuation, document submission, or settlement could mean the rate you thought you were getting is no longer available.
What Happens to Your Offset Account and Redraw
Most fixed rate loans don't offer offset accounts. If you currently have a variable rate loan with an offset holding $30,000, and you switch to fixed, that offset typically converts to a standard savings account with no tax advantage. The interest you earn becomes taxable income, and the interest you pay on the mortgage no longer reduces in real time.
Redraw on fixed loans is either unavailable or capped. If you've been making extra repayments and relying on redraw for emergency access, switching to fixed may remove that access entirely. Some lenders allow up to $10,000 in additional repayments per year on a fixed loan, but you won't have the same flexibility you had on a variable loan.
If cash flow flexibility matters more than rate certainty, a split loan structure may be more suitable. You can fix a portion of your loan for certainty and leave the rest on variable with an offset attached. This preserves access to funds while still providing some protection from rate rises.
The Refinance Process from Variable to Fixed
Refinancing from variable to fixed follows the same process as any other refinance. The lender reassesses your income, expenses, and credit position as though you were applying for a new loan. Your current lender won't automatically let you switch products without a full credit assessment, and a new lender will require a property valuation, income verification, and liability check.
The refinance application typically takes two to four weeks for approval, and another two to four weeks for settlement. If your goal is to lock in a rate before it increases further, starting early matters. Leaving it until after another rate rise means you've already missed the window.
If your fixed rate is coming to an end and you're considering switching back to variable or fixing again, a loan health check before your fixed rate expiry gives you time to compare options without rushing. Lenders often move returning fixed rate customers onto higher variable rates by default, and refinancing before that happens can save thousands over the following year.
Why Some Borrowers Regret Locking In
The most common regret we see is locking in a fixed rate just before rates start falling. If you fix at 6.2% and variable rates drop to 5.5% six months later, you're stuck paying the higher rate for the remainder of your fixed term unless you're willing to pay break costs to exit early.
The second regret is underestimating how much flexibility matters. A borrower who fixes their loan and then needs to access equity for renovations, or wants to sell sooner than planned, faces either a costly break fee or the realisation they can't move forward without paying to exit the loan.
If your circumstances are likely to change, or if you're fixing purely out of fear rather than strategy, it's worth considering whether a partial fix or remaining on variable with a clear repayment plan might serve you in a more effective way. Rate certainty has value, but only if the trade-offs align with what you actually need from the loan.
Call one of our team or book an appointment at a time that works for you to discuss whether refinancing from variable to fixed suits your situation, or whether a different structure might give you the certainty and flexibility you're after.
Frequently Asked Questions
Will I pay break costs when refinancing from variable to fixed?
No, break costs only apply when you exit a fixed rate loan early. If you're currently on a variable rate and want to switch to fixed, you won't face break costs from your existing loan. However, once you lock into a fixed rate, exiting that loan early may trigger break costs depending on rate movements and your remaining fixed term.
What happens to my offset account if I refinance to a fixed rate?
Most fixed rate loans do not offer offset accounts. If you switch from variable to fixed, your offset account typically converts to a standard savings account, and you lose the tax benefit. Interest earned becomes taxable income, and your mortgage interest no longer reduces in real time based on your offset balance.
How long does it take to refinance from variable to fixed?
The refinance process usually takes two to four weeks for approval and another two to four weeks for settlement. The lender will reassess your income, expenses, and credit position, and a property valuation is required. If you're trying to lock in a rate before it rises further, starting early is important.
Can I still make extra repayments on a fixed rate loan?
It depends on the lender. Some fixed rate loans allow limited extra repayments, often capped at around $10,000 per year, while others don't allow any additional repayments without triggering break costs. Redraw facilities on fixed loans are also typically restricted or unavailable.
When does the fixed rate I lock in get confirmed?
The fixed rate is usually confirmed on the day of formal loan approval, not when you submit your application. Some lenders offer a rate lock for 90 to 120 days after approval, protecting you if rates rise before settlement. Others only confirm the rate at settlement, so any increase between approval and settlement may affect the rate you receive.
