Choosing between a fixed and variable interest rate is one of the most important decisions you will make when taking out a home loan. Both options have genuine advantages and trade-offs, and the right choice depends on your financial circumstances, risk tolerance, and plans for the future. This guide explains how each works so you can make an informed decision.
How Fixed Rate Loans Work
With a fixed rate home loan, your interest rate is locked in for a specified period, commonly one, two, three, or five years. During this period, your repayments remain the same regardless of changes to the Reserve Bank of Australia (RBA) cash rate or broader market conditions.
Once the fixed term ends, your loan reverts to the lender's standard variable rate unless you choose to refix or refinance. Many borrowers use the fixed period as a tool for budgeting certainty, particularly during periods when rates are expected to rise.
Advantages of Fixed Rates
- Repayment certainty. You know exactly what your repayments will be for the duration of the fixed term, making household budgeting straightforward.
- Protection from rate rises. If the RBA raises the cash rate during your fixed term, your rate stays the same. This can be valuable if rates are expected to increase.
- Peace of mind. Some borrowers simply prefer the certainty of knowing their repayments will not change, regardless of what happens in the economy.
Disadvantages of Fixed Rates
- Limited flexibility. Most fixed rate loans restrict extra repayments (typically capping them at $5,000 to $10,000 per year) and do not offer offset accounts.
- Break costs. If you need to exit the fixed term early (for example, if you sell the property or want to refinance), you may face significant break costs.
- Missing out on rate drops. If the RBA cuts rates during your fixed term, you will not benefit from the reduction.
How Variable Rate Loans Work
A variable rate loan has an interest rate that can change at any time. Lenders typically adjust variable rates in response to RBA cash rate decisions, but they are not obligated to pass on changes in full or at all. Your repayments will increase when rates rise and decrease when rates fall.
Advantages of Variable Rates
- Full flexibility. Variable loans typically allow unlimited extra repayments, offset accounts, and redraw facilities. These features can help you pay off your loan faster and reduce total interest paid.
- Benefit from rate cuts. When the RBA lowers the cash rate, your variable rate is likely to decrease, reducing your repayments.
- No break costs. You can refinance or pay off the loan at any time without incurring break costs (though discharge fees may still apply).
- Offset accounts. Offset accounts reduce the interest you pay by offsetting your loan balance against your savings. This is one of the most powerful features available on variable rate loans.
Disadvantages of Variable Rates
- Repayment uncertainty. Your repayments can increase if rates rise, which can strain your budget. A 1% rate increase on a $500,000 loan adds approximately $260 to your monthly repayment.
- Budgeting difficulty. Fluctuating repayments make it harder to plan your monthly cash flow with precision.
Split Loans: The Best of Both Worlds?
A split loan divides your mortgage into two portions: one fixed and one variable. This approach gives you partial protection from rate rises while maintaining some flexibility for extra repayments and offset account usage.
For example, on a $600,000 loan, you might fix $400,000 for three years and keep $200,000 on a variable rate with an offset account. The fixed portion gives you repayment certainty on the majority of your debt, while the variable portion lets you park savings in offset and make extra repayments without restriction.
The split ratio is entirely up to you and your broker. There is no "correct" split — it depends on how much certainty you want versus how much flexibility you need. Our brokers at Manage Your Loans can model different split scenarios to show you the impact on repayments and total interest.
How to Decide: Questions to Ask Yourself
- Do I value certainty or flexibility more? If knowing your exact repayments is important, lean towards fixed. If you want the ability to make extra repayments and use an offset account, lean towards variable.
- What are my plans for the next few years? If you may sell, renovate, or make significant financial changes, a variable rate (or a short fixed term) offers more flexibility.
- Can I handle repayment increases? If your budget is tight and a rate rise would cause genuine stress, a fixed rate provides a safety net.
- Do I have significant savings? If you have substantial savings that could sit in an offset account, a variable rate may save you more in interest than the rate difference between fixed and variable.
Current Market Context
Interest rate decisions are influenced by the RBA's monetary policy, inflation trends, employment data, and global economic conditions. Fixed rates are priced based on where lenders expect rates to move in the future, so they are not always lower than variable rates — in fact, during periods when the market expects rates to fall, fixed rates may be higher than variable rates.
Rather than trying to predict rate movements, focus on choosing the loan structure that best matches your financial situation and risk tolerance. A mortgage broker can show you the current rates available across the market and help you make an informed decision.
To compare your options, explore our refinancing services or speak with one of our brokers. We compare rates from over 40 lenders to help you find the right structure for your needs. All loan documents are signed securely via SignAndGo, making the process convenient from start to finish.