What Are Fixed Rate Loan Terms and How Do They Work?

A fixed rate locks in your interest rate for a set period, and the right length depends on how much certainty you need.

If you are weighing up a fixed rate home loan, the real decision is how long to fix for and how much of your loan to fix. This article helps you work out both. We want you to feel confident that your choice suits your life, not just the rate on the page.

What Is a Fixed Rate Home Loan Term?

A fixed rate term is the period, often between one and five years, during which your interest rate stays the same. Your repayments on the fixed portion do not change during that time, even if lenders change their variable rates.

When the term ends, your loan moves to a new arrangement. Depending on your lender, it may revert to a variable rate or you may be offered a new fixed period. Terms on offer differ between lenders, so it is worth comparing them before you commit. Our home loans page explains the range of options we can access.

Fixed Rate vs Variable Rate: What Changes for You?

The main difference is predictability versus flexibility. A fixed rate gives you stable repayments, while a variable rate can move up or down and often comes with more features.

The trade-off with fixing is that many lenders limit extra repayments during the fixed term, and some do not let you link an offset account to the fixed portion. Both limits vary by lender and product, so check the product disclosure before you apply. A variable rate carries the opposite risk: your repayments can rise if your lender lifts the rate.

How Do You Calculate Fixed Rate Repayments?

You calculate repayments using your loan amount, your interest rate and your loan term, and a calculator does the maths for you. Our calculators are a good place to test different amounts.

As an illustration only, a $600,000 loan at an example rate of 6.75% p.a. over 30 years on principal and interest works out to about $3,890 a month. That is an illustrative figure, not an offer or a current rate. Your real rate will depend on your deposit, your lender and your circumstances. Calculating home loan repayments before you fix helps you see whether the payment sits comfortably within your budget.

Is Fixing Your Rate Worth It?

Fixing suits you if a stable repayment matters more to you than flexibility. It is a good fit for borrowers on a tight budget who need to know their exact commitment each month.

The cost is that if variable rates fall, you stay on your higher fixed rate until the term ends. Leaving early can also trigger break costs, which depend on your lender and on how rates have moved since you fixed. If you think you may sell or refinance within the fixed period, ask your lender how break costs would be worked out before you sign.

Split Loan Example: Fixing Half and Keeping Half Variable

A split loan divides your borrowing into a fixed portion and a variable portion, so you get some certainty and some flexibility.

Consider a buyer with a $600,000 loan who likes certainty but also wants to keep paying the loan down faster. They split it evenly, with $300,000 fixed for three years and $300,000 variable. Using the illustrative 6.75% p.a. on both parts over 30 years, each half has a repayment of about $1,946 a month, so the combined figure is the same as the single loan above.

Two years in, this buyer receives an inheritance and wants to put $30,000 toward the loan. Because lenders often cap extra repayments on fixed portions, they direct the lump sum to the variable half. After two years of repayments that half would be about $293,000, so the $30,000 payment brings it to about $263,000. Because variable loans commonly allow an offset account, they could also park savings there to reduce the interest charged. The fixed half stays untouched and its repayment stays the same. The variable half's repayment only stays at about $1,946 if the lender does not recalculate it after the lump sum. The outcome is a loan that gave them stable repayments on one part and room to move on the other.

The cost of this approach is that the variable half can still rise if rates go up, so you only partly protect yourself. Splitting also means managing two sets of loan terms.

What Happens When Your Fixed Term Ends?

When your fixed term ends, your lender will usually move you to a new rate, and that rate may be higher than what you could get elsewhere. The new rate is not always the most favourable one on offer.

It pays to act before the end date rather than wait for the letter to arrive. You can ask your lender for a new rate, compare other lenders, or look at refinancing if a different loan suits you. We cover the timing and your choices on our fixed rate expiry page. A loan health check is also a sound way to see whether your current loan still matches your goals.

Choosing a Fixed Term That Fits Your Life

The right fixed term lines up with what you expect to happen in your own life over that period. Think about whether you plan to move, change jobs, start a family or make extra repayments, then choose a term that does not clash with those plans.

If you are buying for the first time, our first home buyers page walks through the wider decisions around your first loan. Your borrowing capacity also shapes which loans are open to you, so it helps to know that figure early.

A broker's job is to explain the trade-offs plainly and let you decide. We look at your goals first, then compare options from lenders across Australia, so the loan you choose supports your financial stability for the long run.

Call one of our team or book an appointment at a time that works for you, and we will talk through whether fixing, splitting or staying variable suits you.

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