Understanding the basics of Fixed vs Variable Loans

Choosing between a fixed rate, a variable rate, or a split arrangement is one of the first decisions you'll make when applying for a home loan.

The difference comes down to whether your interest rate stays the same for a set period or moves with the market. Each option suits different circumstances, and there's no universal answer. What works depends on how you manage money, what you can afford if rates change, and how long you plan to stay in the property.

Fixed Rate Loans Lock In Your Repayment Amount

A fixed rate loan keeps your interest rate and repayment amount unchanged for an agreed term, usually between one and five years. You'll pay the same amount each month regardless of what happens to the Reserve Bank cash rate or lender pricing.

Consider a buyer purchasing a two-bedroom apartment near Mascot Station. They're on a stable salary but have limited savings after covering their deposit and stamp duty through the First Home Buyers Assistance Scheme. A three-year fixed rate gives them certainty. They know exactly what leaves their account each fortnight, which makes budgeting predictable during the early years of ownership.

The limitation is inflexibility. Most fixed rate loans don't allow extra repayments beyond a small annual cap, often around $10,000 to $30,000 depending on the lender. If you receive a bonus or tax refund and want to pay down the loan faster, you'll either hit that cap or pay a break cost to exit early. Fixed loans also don't usually come with an offset account, so any spare cash sits in a separate savings account earning taxable interest instead of reducing the interest charged on your mortgage.

Variable Rate Loans Offer Flexibility and Features

A variable rate loan moves up or down when your lender changes its rates. The repayment amount adjusts accordingly, which means you need to be comfortable with some uncertainty.

The upside is access to features that help you pay the loan off faster. Most variable loans allow unlimited extra repayments without penalty. Many also include an offset account, which is a transaction account linked to your mortgage. Every dollar in the offset reduces the balance on which interest is calculated. For a first home buyer in Mascot working in the nearby airport precinct or the city, an offset account can be useful if your income fluctuates or you're saving for other goals while paying down the mortgage.

Variable loans also let you redraw any extra payments you've made, which can be helpful if you need access to cash for an unexpected cost. That said, redraw can sometimes take a few days to process, and not all lenders offer it on every product.

The risk with a variable rate is that repayments can increase. If rates rise by one percentage point, your monthly repayment could increase by several hundred dollars depending on your loan size. You'll need a buffer in your budget to absorb that kind of change, particularly in the first few years when your household expenses are still settling.

Split Loans Combine Both Structures

A split loan divides your total borrowing between a fixed portion and a variable portion. You might fix 50% of the loan for three years and leave the other 50% variable, or choose a different ratio depending on what you're trying to achieve.

This structure is common among first home buyers who want some repayment certainty but don't want to lose all flexibility. You can make extra payments on the variable portion and use an offset account, while the fixed portion protects part of your repayment from rate increases.

As an example, a buyer purchasing a one-bedroom unit in the Eastlakes area of Mascot might split their loan 60% fixed and 40% variable. The fixed portion covers their core living expenses and gives them confidence they can meet repayments even if their circumstances change. The variable portion allows them to pay extra when they can, particularly in the early years when they're still adjusting to the costs of ownership and may want to reduce debt quickly.

The downside is that you're managing two loans with two sets of terms. Some lenders charge two sets of fees. The fixed portion still has the same restrictions around extra repayments and break costs, and the variable portion still carries interest rate risk.

What Happens When a Fixed Rate Ends

When your fixed term finishes, the loan automatically moves to the lender's standard variable rate unless you take action. That rate is often higher than the discounted variable rates available to new customers, so most borrowers either refinance or negotiate a new rate before the fixed period ends.

You'll usually receive a letter from your lender around 90 days before the fixed term expires. This is the time to compare what's available, either with your current lender or elsewhere. If you've built up equity and your borrowing behavior has been solid, you may be able to access a lower rate or switch to a loan structure that better suits your current situation. If your income or employment has changed, refinancing might be more difficult, so it's worth reviewing your options early.

If you're approaching the end of a fixed term and you're unsure what to do next, speaking with a broker before the expiry date gives you time to act rather than rolling onto a higher rate by default. You can read more about this process on our fixed rate expiry page.

Choosing the Right Option for Your Situation

There's no single loan type that works for every first home buyer. The right structure depends on your income stability, your tolerance for repayment changes, and whether you want the ability to pay extra or access features like offset.

If you're buying in Mascot and your income is reliable but your budget is tight, a fixed rate might give you the certainty you need during the first few years. If you expect bonuses, overtime, or other lump sums and you want to reduce your loan quickly, a variable loan with offset and unlimited extra repayments might suit you better. If you want elements of both, a split lets you balance certainty and flexibility without committing entirely to one approach.

You can explore your home loan options and see how different structures affect your repayments and timeline. If you're ready to move forward or want to talk through which approach makes sense for your situation, call one of our team or book an appointment at a time that works for you.

Frequently Asked Questions