How to Lock In a Fixed Rate Loan as a First Home Buyer

A fixed rate loan gives you a known repayment for a set period, typically one to five years.

That certainty matters when you are buying your first property and want to avoid surprises while you settle into ownership. A fixed rate protects you from rate rises during the fixed term, but it also means you miss out on any rate cuts, and most fixed loans come with restrictions on extra repayments and offset accounts. The decision is not whether fixed rates are good or bad, it is whether the trade-off suits your circumstances.

Why First Home Buyers Consider Fixed Rates

First home buyers often choose fixed rates to budget with confidence during the first few years of ownership.

When you are managing a new mortgage, rates and body corporate fees, knowing exactly what will leave your account each fortnight removes one variable. Fixed rates also provide a safeguard if rates climb after you settle, which has happened more than once in the past decade. But the protection comes at a cost. If rates fall, you remain locked in. If you want to make extra repayments beyond a small annual allowance, most lenders will charge you. And if you sell or refinance before the fixed term ends, break costs can run into the thousands.

How Fixed Rate Terms Affect Your Flexibility

Shorter fixed terms give you more flexibility to adjust your loan structure when the fixed period ends.

A two-year fixed term allows you to reassess sooner, which is useful if you expect your income to increase or if you are unsure whether you will stay in the property long-term. A five-year fixed term offers longer certainty but assumes your circumstances will not change. In our experience, first home buyers who fix for five years often underestimate how much their financial position or property plans can shift in that time. Consider a buyer who locks in a five-year fixed rate at 6.2% with no offset account. Two years later, they receive an inheritance and want to park $40,000 against the loan to reduce interest. With most fixed loans, they cannot access an offset, and depositing the funds directly into the loan may trigger early repayment fees. The funds sit in a savings account earning 4%, while the loan continues accruing interest at 6.2%. That is a 2.2% annual cost on $40,000, or around $880 each year, simply because the loan structure did not accommodate a change in circumstances.

Fixed vs Split: Which Structure Suits a First Home Buyer

A split loan divides your borrowing between fixed and variable portions, usually 50/50 or 70/30.

The variable portion gives you access to an offset account and allows unlimited extra repayments, while the fixed portion provides certainty on part of your debt. This structure works well for first home buyers who want some protection from rate rises but also want the flexibility to reduce their loan faster if their income grows. The variable portion also gives you somewhere to direct any savings, tax refunds, or bonuses without triggering break costs. If you are using the First Home Guarantee to borrow with a 5% deposit, a split structure allows you to take advantage of the reduced LMI while still keeping your options open. The main downside is that split loans require more active management. You need to decide how much to allocate to each portion at the start, and when the fixed term ends, you will need to decide whether to refix, move it all to variable, or adjust the split ratio.

How Your Deposit Size Affects Fixed Rate Pricing

Lenders price fixed rates differently depending on your deposit size.

A borrower with a 20% deposit will typically receive a lower fixed rate than someone borrowing with a 5% or 10% deposit, even when both are first home buyers using the same lender. The difference can be 0.2% to 0.4%, which over three years on a loan of $500,000 amounts to several thousand dollars in additional interest. If you are using a low deposit scheme such as the First Home Guarantee, you avoid paying LMI, but the interest rate itself is often priced at the higher end of the lender's range. That is not a reason to avoid a low deposit loan, but it does mean the fixed rate you lock in should be compared carefully across lenders. Some lenders price their low deposit fixed rates more competitively than others, and the difference is not always reflected in their standard published rates.

What Happens When Your Fixed Term Ends

When your fixed term expires, your loan automatically reverts to the lender's standard variable rate unless you take action.

That revert rate is usually higher than the variable rate offered to new customers, sometimes by 0.5% or more. If you do nothing, you will pay more than you need to. Most borrowers either refix at a new rate, switch to a discounted variable product with the same lender, or refinance to a different lender. The right choice depends on your circumstances at the time. If rates have fallen and you want flexibility, moving to a variable loan with an offset account makes sense. If rates have risen and you want to lock in again, refixing for another term may be appropriate. The important part is to start the conversation with your broker at least three months before the fixed term ends, so you have time to compare options and avoid rolling onto a higher rate by default.

Stamp Duty Concessions and Fixed Rate Loans in Victoria

Victoria offers stamp duty relief for eligible first home buyers purchasing properties up to $750,000, with no duty payable on properties under $600,000.

That saving can be substantial, often between $10,000 and $30,000 depending on the purchase price, and it directly affects how much you need to borrow. When you reduce your loan size by even $20,000, the interest you pay over the life of the loan drops significantly, whether you choose fixed or variable. If you are buying in Melbourne and eligible for the concession, factor that into your deposit calculations before you lock in a fixed rate. A smaller loan amount may allow you to negotiate a lower rate or give you more flexibility to split your loan without stretching your budget. The concession applies to both established homes and new builds, and it can be combined with the First Home Guarantee, which means you can buy with a 5% deposit, avoid LMI, and pay little or no stamp duty if the property falls within the threshold.

When Fixed Rates Work Against You

Fixed rates become a burden when your circumstances change and the loan structure cannot adapt.

Selling the property, refinancing to access equity, or paying out the loan early can all trigger break costs, which are calculated based on the difference between your fixed rate and the current wholesale rate for the remaining term. If rates have fallen since you fixed, the break cost can be significant. If rates have risen, the break cost may be zero or minimal. The issue is that you cannot predict rate movements years in advance, and life events such as job relocation, relationship changes, or unexpected windfalls do not wait for your fixed term to expire. If you have any uncertainty about your medium-term plans, a shorter fixed term or a split loan structure reduces the risk of being locked into a product that no longer suits you.

Fixed rate loans are a tool, not a default. They work when you need certainty and when your circumstances are stable enough to commit to a set repayment structure for several years. Call one of our team or book an appointment at a time that works for you.

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