For most doctors, a variable rate gives you more flexibility — offset accounts, unlimited extra repayments, and no break costs if your circumstances change. Fixed rates suit a narrower situation: you need certainty on repayments while navigating a career transition, or you want to lock in before rates move. Most high-income medical professionals end up on variable, or on a structured split between the two.
What Fixed Rates Actually Give You
A fixed rate locks your interest rate for a set term, usually one to five years. Repayments stay the same regardless of what the RBA does. That predictability is genuinely useful if you are a registrar on a training salary with tight monthly cash flow, or if you have just purchased and want certainty while you settle in.
The trade-off is reduced flexibility. Most fixed loans cap extra repayments — commonly at $10,000 per year — and do not allow offset accounts. They also charge break costs if you refinance or sell before the fixed period ends. Break costs can be substantial, particularly when rates have moved sharply. For a doctor with a rising income trajectory who wants to reduce the loan fast, these restrictions carry a real cost.
Why Variable Works Better for Most High Earners
Variable rates move with the market. When the RBA cuts, your rate typically drops, assuming your lender passes it on. More importantly, variable loans let you make unlimited extra repayments and use an offset account.
An offset account lets you park savings and income against the loan balance. A senior consultant with $150,000 sitting in an offset against a $1.5M mortgage saves interest on every dollar, every day. For doctors with strong discretionary income between paydays, this is one of the most effective debt reduction tools available. The full mechanics are covered in the doctor home loans guide.
Variable also preserves your exit options. If you need to sell, refinance, or restructure in the next few years, you are not locked in and not facing break cost calculations.
Splits: The Middle Ground
You can fix a portion of your loan and leave the rest variable. A 70/30 split — 70% variable, 30% fixed — is a common starting point. The variable portion retains offset access and repayment flexibility; the fixed portion provides some rate certainty.
It works best for a doctor navigating genuine uncertainty: finishing a fellowship, moving between positions, or unsure about income trajectory over the next 12 to 18 months. The downside is complexity. Two portions, two rate environments, and break costs still apply if the fixed side needs changing before the term ends.
Timing and the Rate Cycle
Fixed rates in Australia are priced off bank funding costs, not just the RBA cash rate. By the time the RBA signals a move, banks have usually already repriced their fixed products. Trying to lock in at the bottom by watching the news rarely works in practice.
A more useful frame: stress-test your current position. Can you comfortably service the loan if rates rise another 1.5 to 2%? If yes, variable is probably fine. If a rate rise would genuinely strain your budget in the near term, fixing for a defined period while you build equity and income is a reasonable hedge.
Key Takeaways
- Variable gives you offset accounts, unlimited extra repayments, and full flexibility — the better fit for most high-income medical professionals
- Fixed locks repayments for certainty but restricts extra payments, removes offset access, and can trigger significant break costs
- Split loans offer a middle ground; they preserve some flexibility but add complexity and retain break cost risk on the fixed portion
- Banks price fixed rates ahead of RBA moves — timing the bottom is harder than it looks
- Stress-testing your serviceability at higher rates is more useful than trying to forecast the cycle
Work It Out With Us
The right loan structure depends on your career stage, income, and how likely your situation is to change. Voyage Financial works exclusively with medical professionals across Australia. Book a call at voyagefinancial.com.au and we will model both scenarios against your actual numbers.
General Advice Warning: The information in this article is general in nature and does not take into account your individual circumstances, financial situation, or goals. It was accurate at the time of publication and may not reflect current market conditions or legislation. This article should not be relied upon as a substitute for professional financial, legal, or tax advice. Always seek guidance from a licensed adviser before making financial decisions. Where information from third-party sources is referenced, it has been sourced from reputable outlets in good faith, but Voyage Financial cannot guarantee its ongoing accuracy.
