A fixed rate home loan locks in your interest rate for a predetermined period, usually between one and five years. During this fixed period, your repayments remain exactly the same regardless of what happens to the broader interest rate market. If the Reserve Bank of Australia raises the cash rate, your repayments do not increase. Conversely, if rates fall, your repayments do not decrease: you are locked into the agreed rate for the duration of the fixed term.
Fixed rates appeal to borrowers who value budget certainty and want to know exactly what their mortgage repayment will be each month. This predictability is particularly valuable for first home buyers adjusting to homeownership costs, families on a tight budget, or anyone who sleeps better at night knowing their repayments cannot change unexpectedly.
At the end of the fixed period, your loan typically reverts to the lender’s standard variable rate (known as the revert rate), which is often higher than the discounted variable rates available to new customers. This is why it is important to review your loan before the fixed period expires, either to negotiate a new rate with your current lender or to refinance to a more competitive product.
A variable rate home loan has an interest rate that can change at any time, typically in response to movements in the RBA’s cash rate or changes in the lender’s funding costs. When rates go up, your repayments increase; when rates go down, your repayments decrease. This creates both an opportunity and a risk compared to fixed rate loans.
Variable rate loans are the most popular home loan type in Australia, and for good reason. They offer significantly more flexibility than fixed rate products, including access to offset accounts, unlimited extra repayments, and redraw facilities. You can also refinance to a different lender at any time without incurring break costs, giving you the freedom to switch if a better deal becomes available. Variable rate borrowers can also request a rate review from their lender at any time, whereas fixed rate borrowers can only negotiate at the end of their term.
The downside is uncertainty. In a rising rate environment, your repayments can increase substantially over a short period. For example, during the rate-hiking cycle of 2022-2023, borrowers with variable rate loans saw their repayments increase by hundreds of dollars per month. This unpredictability can be stressful, particularly for borrowers with limited budget flexibility.
| Feature | Fixed Rate | Variable Rate |
|---|---|---|
| Repayment certainty | Guaranteed for fixed period | Can change at any time |
| Offset account | Limited or unavailable | 100% offset widely available |
| Extra repayments | Capped (usually $10K-$30K/year) | Unlimited |
| Redraw facility | Limited or unavailable | Widely available |
| Break costs | Yes, can be substantial | No break costs |
| Refinancing flexibility | Restricted during fixed term | Can refinance at any time |
| Rate negotiation | Only at end of term | Can request a review at any time |
| Rate benefit in falling market | No, locked in at higher rate | Yes, rate decreases passed on |
| Rate protection in rising market | Yes, protected for fixed term | No, rate increases passed on |
One of the most important considerations with fixed rate loans is the potential for break costs (also called early termination fees or economic costs). These fees apply if you pay off, refinance, or make excess extra repayments on a fixed rate loan before the fixed period expires. Break costs compensate the lender for the financial loss they incur when a fixed rate contract is terminated early.
The calculation of break costs is complex and depends on factors including the remaining term of the fixed period, the difference between your fixed rate and the current wholesale market rate, and the outstanding loan balance. Break costs can range from a few hundred dollars to tens of thousands of dollars. In extreme cases, where market rates have fallen significantly below your fixed rate, break costs can exceed $50,000 on a large loan.
Break costs are a critical consideration if there is any chance you might need to sell, refinance, or significantly restructure your finances during the fixed period. Scenarios that commonly trigger break costs include selling due to a relationship breakdown, job relocation, upgrading to a larger home, or wanting to take advantage of lower rates with another lender. If any of these scenarios are possible within your fixed term, a variable or split loan may be more appropriate.
is not uncommon in break costs when exiting a fixed rate loan early in a falling rate environment, making it essential to consider your future plans before locking in
If you cannot decide between fixed and variable, a split loan offers a compromise. A split loan divides your mortgage into two portions: one fixed and one variable. This gives you the repayment certainty of a fixed rate on part of your loan while retaining the flexibility of a variable rate (including offset and extra repayment options) on the remainder.
Common split ratios include 50/50, 60/40, and 70/30, but you can typically choose any ratio that suits your needs. A more conservative borrower might fix 70% and keep 30% variable, while someone who wants maximum flexibility might fix only 30% for a small amount of rate certainty while keeping 70% variable for access to features and the ability to make significant extra repayments.
One practical approach is to fix enough of the loan to cover your essential repayments, giving you budget certainty on the amount you must pay each month, and keep the rest variable for offset access and flexibility. Your broker can help you work out the right split ratio for your situation.
The split loan approach hedges your risk in both directions. If rates rise, the fixed portion protects part of your loan. If rates fall, the variable portion benefits from the reduction. While you will not fully benefit from either scenario, you also will not fully suffer from an adverse rate movement. For many borrowers, this balanced approach provides the right mix of security and flexibility.
Priya and Raj purchased their first home in Belmont, Geelong, for $650,000 with a $130,000 deposit. They wanted some rate certainty but also valued the ability to use an offset account and make extra repayments. We structured their $520,000 loan as a 60/40 split: $312,000 fixed for three years at 5.79% and $208,000 variable at 6.04% with a 100% offset account. They directed their $25,000 savings into the offset, reducing interest on the variable portion. The fixed portion gave them confidence in their budget, while the variable portion provided the flexibility to accelerate repayments when bonus income or tax refunds arrived.
The decision between fixed and variable rates is not just about predicting where interest rates are heading. It is about aligning your loan structure with your personal financial circumstances, risk tolerance, and life plans.
Consider fixing if: you are on a tight budget and need repayment certainty, you believe rates are likely to rise in the near term, you do not plan to sell or refinance during the fixed period, you do not have significant savings to put in an offset account, or you want to remove interest rate risk from your financial planning for a defined period.
Consider variable if: you want maximum flexibility with extra repayments and offset, you may need to sell or refinance within the next few years, you have substantial savings that would benefit from an offset account, you believe rates may fall or remain stable, or you want the ability to switch lenders if a better deal becomes available.
Consider splitting if: you want a balance of certainty and flexibility, you are uncertain about the direction of interest rates, you have some savings for offset but also want budget predictability, or you want to spread your risk rather than committing fully to either approach.
Do not try to time the market. Historically, borrowers who choose between fixed and variable based on their personal financial circumstances rather than rate predictions tend to achieve better long-term outcomes. Focus on what you can control (your budget, repayment strategy, and loan features) rather than trying to predict future rate movements. Your mortgage broker can model both fixed and variable scenarios using current rates to show you the actual dollar difference, helping you make an informed decision based on facts rather than speculation.
Understanding where we sit in the interest rate cycle is crucial when deciding between fixed and variable rates. The Reserve Bank of Australia (RBA) adjusts the cash rate based on economic conditions, and these changes directly impact variable rate borrowers immediately while fixed rate borrowers are shielded until their fixed period expires.
During periods of rising rates, fixing can protect you from successive increases. However, by the time most borrowers decide to fix, lenders have already priced expected rate rises into their fixed rate offerings. This means you rarely “beat” the market by fixing: lenders employ teams of economists who factor rate expectations into their pricing models well ahead of official RBA decisions.
Conversely, during falling rate cycles, variable rate borrowers benefit from each reduction as it flows through to their repayments. Fixed rate borrowers miss out on these savings until their term expires, which is why timing your fixed rate period correctly can save or cost you tens of thousands of dollars over the life of your loan.
Rate Cycle Insight: Historical data shows the average RBA rate cycle lasts approximately 2-3 years from trough to peak. Since 2000, Australia has experienced four full rate cycles, with variable rates fluctuating by as much as 3.25 percentage points within a single cycle.
One of the most practical considerations when choosing between fixed and variable rates is how each option affects your monthly budget and overall cash flow management. This is especially important for families, first home buyers stretching into the market, and self-employed borrowers with fluctuating incomes.
Fixed rates provide absolute certainty for your repayment amount during the fixed term. If you fix at 5.89% on a $600,000 loan over 30 years, your monthly principal and interest repayment will be approximately $3,553. This figure does not change regardless of what happens with the cash rate, making it significantly easier to plan household budgets, manage savings goals, and forecast your financial position.
Variable rates, while typically offering a lower starting point, introduce an element of uncertainty. A 0.25% rate increase on a $600,000 loan adds roughly $92 per month to your repayments. Over the course of a full rate hiking cycle with multiple increases, your repayments could rise by $300-$500 per month or more. For borrowers on tight budgets, this uncertainty can create genuine financial stress.
| Scenario | Fixed (5.89%) | Variable (5.99%) | Variable After +0.75% |
|---|---|---|---|
| Monthly Repayment ($600K) | $3,553 | $3,593 | $3,871 |
| Annual Cost | $42,636 | $43,116 | $46,452 |
| Budget Certainty | Guaranteed | Moderate | Uncertain |
| Extra Repayment Flexibility | Limited (usually $10K-$20K/yr) | Unlimited | Unlimited |
Your choice between fixed and variable rates also has significant implications for your ability to refinance in the future. Variable rate loans offer complete flexibility: you can refinance to another lender at any time without penalty, taking advantage of competitive offers or better features as they become available in the market.
Fixed rate loans, however, come with break costs if you refinance before the fixed period expires. These costs can be substantial, sometimes running into tens of thousands of dollars depending on the difference between your fixed rate and the current wholesale rate, the remaining term, and the loan balance. This effectively locks you into your current lender for the duration of the fixed period.
For borrowers who might need to sell their property within the next few years (whether due to job relocation, family changes, or investment strategy adjustments), variable rates provide significantly more flexibility. Similarly, if you anticipate wanting to access equity through refinancing for renovations or further property purchases, a variable rate preserves your options without the risk of costly break fees.
Broker Pro Tip: If you are considering fixing your rate, ask your broker to calculate the estimated break cost scenarios. Understanding the potential exit costs upfront helps you make a fully informed decision and avoid unpleasant surprises if your circumstances change during the fixed term.
You can, but it will likely trigger break costs. The size of the break cost depends on how much time remains on your fixed term, the difference between your rate and current market rates, and your loan balance. Before breaking a fixed rate, ask your lender for a break cost estimate so you can determine whether the potential savings from switching outweigh the exit costs. Your broker can also help you calculate whether refinancing makes financial sense after accounting for break costs.
No. The relationship between fixed and variable rates changes depending on market conditions and expectations about future rate movements. When markets expect rates to fall, fixed rates are often lower than variable rates. When markets expect rates to rise, fixed rates may be higher than current variable rates because lenders price in the anticipated increases. The spread between fixed and variable rates is an indicator of where the market expects rates to move, though this is not always accurate.
When your fixed rate period expires, your loan automatically reverts to the lender’s standard variable rate, known as the revert rate. This rate is often higher than the discounted rates available to new customers, which means your repayments could increase significantly. To avoid paying a premium revert rate, contact your broker or lender before the fixed period ends to negotiate a new rate, refix for another term, or refinance to a more competitive product. Setting a reminder three months before expiry gives you time to explore your options.
Shorter fixed terms (one to two years) offer less rate certainty but also less commitment: you return to the market sooner and can reassess your strategy. Longer fixed terms (three to five years) lock in your rate for longer, providing greater certainty but less flexibility. Shorter terms typically have lower rates than longer terms because the lender’s risk over a shorter period is lower. Choose based on how long you need certainty and how likely you are to change your circumstances during the fixed period.
Our experienced brokers compare options across 60+ lenders to find the right solution for your situation.
Director & Senior Finance Broker
With years of experience in mortgage broking and finance, Melanie helps clients across Geelong, the Surf Coast, Melbourne and regional Victoria navigate the complexities of home loans and business finance. Contact our team on 03 9020 2699.
