One of the Biggest Mortgage Decisions You'll Make
When you apply for a home loan, one of the first — and most consequential — choices you'll face is whether to take a fixed rate or a variable rate mortgage. Both have genuine advantages, and the right answer depends on your financial situation, risk tolerance, and outlook on interest rates.
This guide breaks down both options clearly so you can make an informed choice.
What Is a Fixed Rate Mortgage?
A fixed rate mortgage locks your interest rate for a set period — typically one to five years, though longer terms exist. Regardless of what happens to interest rates in the broader economy during that period, your rate stays the same.
Advantages of Fixing Your Rate
- Certainty and predictability: Your repayment amount won't change, making budgeting straightforward.
- Protection from rate rises: If official interest rates increase, you're insulated.
- Peace of mind: Particularly valuable for first-time buyers adjusting to a new financial reality.
Disadvantages of Fixing Your Rate
- You won't benefit from rate cuts: If rates fall, you're stuck paying the higher fixed rate.
- Break costs can be significant: Exiting a fixed loan early typically incurs fees.
- Less flexibility: Fixed loans often have limits on extra repayments and may not include offset accounts.
What Is a Variable Rate Mortgage?
A variable rate mortgage moves with the market. When the central bank adjusts the official cash rate, lenders typically pass those changes on — up or down — to variable rate borrowers.
Advantages of Variable Rates
- You benefit from rate cuts: When rates fall, your repayments fall too.
- More features available: Variable loans typically include offset accounts and unlimited extra repayments.
- Greater flexibility: Easier to refinance or pay off the loan early without penalty.
Disadvantages of Variable Rates
- Uncertainty: Your repayment can increase if rates rise.
- Budgeting complexity: Harder to plan long-term when your repayment amount can change.
- Rate risk: In rising rate environments, variable borrowers feel immediate financial pressure.
How to Choose: Key Questions to Ask Yourself
- How tight is my budget? — If you're borrowing close to your maximum capacity, rate certainty matters more. A variable rate rise could cause genuine financial stress.
- How long do I plan to hold this property? — Short-term holders may not benefit from fixing, especially if break costs apply.
- What is the rate environment doing? — If rates are at or near historical highs, fixing may protect you from further rises. If rates are declining, variable keeps you in the game.
- Do I want flexibility? — If you anticipate making extra repayments or want an offset account, variable loans are typically more accommodating.
The Split Loan Strategy
Many borrowers choose to split their loan — fixing a portion of it while keeping the remainder variable. This approach delivers partial certainty while retaining some of the flexibility and upside of a variable rate. It's a practical middle ground that suits a wide range of borrowers.
Fixed vs. Variable: Side-by-Side Comparison
| Feature | Fixed Rate | Variable Rate |
|---|---|---|
| Repayment certainty | ✅ Yes | ❌ No |
| Benefits from rate cuts | ❌ No | ✅ Yes |
| Offset account | Limited/none | ✅ Usually available |
| Extra repayments | Often capped | ✅ Unlimited |
| Early exit flexibility | Break costs apply | ✅ More flexible |
| Best in environment | Rising rates | Falling/stable rates |
Always Compare the Full Picture
Interest rate type is just one dimension of a mortgage. Comparison rates, fees, lender reputation, offset functionality, and redraw facilities all factor into the total cost and value of a loan. Use a mortgage broker to compare products across multiple lenders, and always read the product disclosure statement before committing.
There's no universally "right" answer here — but there is a right answer for your specific situation. Understanding both options puts you in the best position to find it.