Fixed vs variable home loan: which is right for you? A fixed rate can provide repayment certainty for a set period, while a variable rate can offer greater flexibility but may change over time. A split home loan combines elements of both. The right structure depends on your budget, plans, loan features and preference for certainty versus flexibility.
The Sydney mortgage brokers at CBM Mortgages can help you compare fixed, variable and split home loan options across our lender panel and understand how the different structures may affect repayments and flexibility.
There is no universally better choice between fixed and variable home loans. Instead of trying to predict interest rates perfectly, consider how each option would work with your financial circumstances and plans.
What is the difference between a fixed and variable home loan?
A fixed-rate home loan has an interest rate that stays the same for an agreed fixed period. During that period, scheduled repayments generally remain predictable, subject to the terms of the loan.
A variable-rate home loan has an interest rate that can change over time. The lender determines whether and when to change its variable rates and by how much.
A split home loan divides the loan into fixed and variable portions. This can provide some repayment certainty while retaining some of the flexibility that may be available with a variable-rate loan.
How does the RBA cash rate affect home loan rates?
The Reserve Bank of Australia’s cash rate is an important influence on Australian lending rates, but a lender’s mortgage rate does not automatically move one-for-one with every cash-rate change.
The Reserve Bank of Australia publishes the current cash rate and its cash-rate decisions.
The RBA has also explained that the cash rate and expectations about its future path influence bank funding costs, which are one of the important factors affecting lending rates.
Lenders may also consider factors such as:
- deposit and wholesale funding costs;
- interest-rate expectations;
- hedging costs;
- competition between lenders;
- credit and capital costs;
- the type of loan and borrower; and
- the lender’s pricing strategy.
This is why fixed and variable home loan rates can move differently and why a lender does not necessarily change its customer rates by exactly the same amount as an RBA cash-rate movement.
How does a fixed-rate home loan work?
With a fixed-rate home loan, the interest rate is locked in for an agreed period.
Moneysmart explains that fixed periods are usually between one and five years, although available fixed terms depend on the lender and product.
When the fixed period finishes, the loan will generally move to the lender’s applicable variable revert rate unless you choose another available option.
Potential benefits of a fixed-rate home loan
- Repayment certainty. Your applicable interest rate stays unchanged for the fixed period.
- Easier budgeting. Predictable scheduled repayments can make household budgeting simpler.
- Protection from rate increases during the fixed period. If relevant market rates rise, your fixed rate remains unchanged for the agreed period.
Potential disadvantages of a fixed-rate home loan
- You may not benefit from falling rates. If variable rates fall, your fixed rate remains unchanged during the fixed period.
- Break costs may apply. Exiting, refinancing or repaying a fixed-rate loan early can trigger break costs depending on the lender, loan and market conditions.
- Extra repayments may be limited. Some fixed loans restrict how much extra you can repay during the fixed period.
- Features may be more limited. Offset accounts, redraw and other features may not be available on all fixed-rate loans.
How does a variable-rate home loan work?
A variable home loan interest rate can rise or fall over time.
While RBA cash-rate decisions can influence mortgage pricing, the lender decides whether to change its variable rate and by how much.
Potential benefits of a variable-rate home loan
- Greater flexibility may be available. Depending on the product, borrowers may be able to make additional repayments without the restrictions that can apply to fixed loans.
- Offset or redraw features may be available. These can provide additional ways to manage cash flow and interest costs.
- You may benefit if the lender reduces its variable rate.
- There may be greater flexibility when refinancing or repaying the loan. Normal lender fees and conditions can still apply.
Potential disadvantages of a variable-rate home loan
- Repayments can increase. If the lender raises the variable rate, the required repayment may rise.
- Less repayment certainty. Future repayments may be more difficult to predict.
- Features can carry additional costs. A loan with an offset account or package features may carry a different interest rate or fee structure from a simpler loan.
What is a split home loan?
A split home loan divides your borrowing between fixed and variable portions.
For example, a borrower could choose to fix part of the loan while retaining a variable rate on the remaining portion. The actual split does not need to be 50/50 and available arrangements depend on the lender.
A split structure may suit borrowers who want:
- some certainty over part of their repayments;
- some exposure to future variable-rate reductions;
- the ability to make additional repayments on the variable portion, subject to product terms; or
- access to features associated with an eligible variable portion.
The trade-off is additional complexity because the two loan portions can have different rates, repayment conditions and features.
Can I have an offset account with a variable home loan?
Offset accounts are generally associated with variable-rate home loans, although availability depends on the lender and product.
Moneysmart explains that an offset account reduces the loan balance on which interest is calculated. 【3-995869】
However, an offset account is not automatically valuable for every borrower. A loan offering an offset may have higher fees or a different interest rate, so the expected interest saving should be compared with any additional cost.
For more detail, see our guide to mortgage offset accounts.
What happens if I break a fixed-rate home loan?
A fixed-rate loan may have break costs if you refinance, sell the property, repay the loan or otherwise end the fixed-rate arrangement before the agreed period expires.
The amount is not a standard penalty. It depends on the lender, the loan, the amount being repaid, the remaining fixed period and movements in relevant market interest rates.
Before choosing a fixed loan, ask:
- whether extra repayments are permitted;
- the maximum additional repayment allowed before conditions apply;
- whether redraw is available;
- what may trigger break costs;
- whether the fixed loan is portable if you move property; and
- what variable revert rate may apply when the fixed period ends.
Should I fix my home loan if I think interest rates will rise?
Trying to predict future interest rates should not be the only reason to choose a fixed loan.
Interest-rate forecasts can change as inflation, economic conditions, labour markets, financial markets and RBA policy evolve.
A more practical question is:
Would the certainty of fixed repayments be valuable to your household even if rates later fall?
If the answer is yes, a fixed rate may be worth considering. If flexibility, additional repayments and features are more important, a variable or split structure may be more suitable.
Fixed vs variable home loan comparison
| Feature | Fixed rate | Variable rate |
|---|---|---|
| Interest rate | Set for the agreed fixed period | Can change at the lender’s discretion |
| Repayment certainty | Higher during the fixed period | Lower because rates may change |
| Benefit if rates fall | Generally no during the fixed period | Possible if the lender reduces the variable rate |
| Extra repayments | May be restricted | Often more flexible, subject to product terms |
| Offset account | May be unavailable or limited | More commonly available on eligible products |
| Early exit | Break costs may apply | Generally no fixed-rate break cost, although other fees may apply |
How should I decide between fixed and variable?
Consider the decision in terms of your household rather than trying to identify the perfect interest-rate forecast.
Ask yourself:
- How important is repayment certainty?
- Could your budget manage a higher variable repayment?
- Do you expect to make significant extra repayments?
- Do you plan to sell or refinance during the potential fixed period?
- Would an offset account be valuable based on the balance you expect to maintain?
- Are you comfortable missing out on lower variable rates if rates fall during a fixed period?
- Would splitting the loan provide an acceptable balance of certainty and flexibility?
Also look beyond the headline interest rate. Moneysmart recommends comparing rates, fees, features and the broader cost of the loan. 【4-14626c】
Frequently asked questions
Is a fixed or variable home loan better?
Neither is automatically better. A fixed rate may suit borrowers who value repayment certainty, while a variable rate may suit borrowers who value flexibility and features. A split loan can combine elements of both.
Can a variable home loan rate change without an RBA cash-rate change?
Yes. The RBA cash rate is an important influence on mortgage rates, but lenders set their own variable rates and can consider funding costs, competition, risk and other pricing factors.
How long can I fix a home loan rate for?
Available terms depend on the lender and product. Fixed-rate periods are commonly offered for a set number of years, with Moneysmart noting that fixed periods are usually between one and five years.
Can I make extra repayments on a fixed-rate home loan?
Some fixed-rate home loans allow limited additional repayments, but conditions vary. Check the lender’s repayment limits and whether break costs or other conditions could apply before making a large additional repayment.
What happens when my fixed-rate period ends?
The loan will generally move to the lender’s applicable variable revert rate unless you arrange another available option. Review the expected rate, repayments and alternatives before the fixed period ends.
Is a split home loan worth considering?
A split loan can be useful when you want some repayment certainty from a fixed portion while retaining some flexibility through a variable portion. The appropriate split depends on your circumstances and the products available.
Comparing fixed, variable or split home loans?
CBM Mortgages can help you compare suitable home loan structures, rates and features across our lender panel and understand the trade-offs for your circumstances.
Disclaimer: This article provides general information only and does not constitute personal financial, legal, tax or credit advice. Interest rates, fees, lending criteria, loan features and lender policies can change. Consider your circumstances and obtain appropriate professional advice before choosing or changing a home loan.
Written by Craig McDonald. Updated November 2026.
