Smart Ways to Approach Fixed Rate Loans as a First Home Buyer

A fixed rate loan locks your interest rate for a set period, usually between one and five years.

For most first home buyers, the appeal is obvious: certainty. When you are budgeting down to the last hundred dollars each fortnight, knowing your repayment will not jump unexpectedly can make the difference between comfortable and precarious. But the features that come with a fixed rate loan, and the ones that do not, matter just as much as the rate itself.

What a Fixed Rate Loan Actually Locks In

When you fix your rate, you are locking in the interest component of your repayment for the term you choose. If you fix at 5.89% for three years, that rate does not move, even if the Reserve Bank increases the cash rate twice in that period. Your minimum repayment stays the same unless you make a lump sum payment that brings the principal down.

Consider a buyer who fixes $480,000 over three years at current fixed rates. Their fortnightly repayment is set from day one. A borrower on a variable rate with the same loan amount could see their repayment increase by $150 or more per fortnight if rates rise by just 0.50%. That difference can push a tight budget into the red, particularly in the first year when every dollar is spoken for.

The Trade-Off: What You Give Up When You Fix

Most lenders do not offer an offset account on fixed rate loans. That means any savings you hold outside the loan will earn standard interest in a transaction or savings account, usually far less than the rate you are paying on your mortgage. If you are used to the idea of parking your savings in an offset to reduce interest, a fixed loan changes that equation.

Some fixed loans allow a redraw facility, but it is often capped. You might be able to make extra repayments up to $10,000 or $20,000 per year without penalty, and those funds can usually be redrawn if needed. But if you want to pay down $50,000 from a work bonus or inheritance, you will likely trigger break costs. Those costs are calculated based on the difference between your fixed rate and the rate the lender can now earn by lending that money elsewhere. If fixed rates have fallen since you locked in, the break cost can run into thousands of dollars.

How the First Home Guarantee Interacts with Fixed Rates

The expanded First Home Guarantee, which removed income caps from 1 October 2025, allows eligible buyers to borrow up to 95% of the property value without paying Lenders Mortgage Insurance. This scheme works with both variable and fixed rate products, so you can lock in your rate and still access the Guarantee.

In our experience, buyers using the Guarantee often choose to fix a portion of their loan rather than the full amount. This gives them rate protection on the majority of the debt while keeping some flexibility through a variable split. The variable portion can have an offset account attached, which is where most buyers direct their savings and any government grants they receive after settlement. The fixed portion covers the bulk of the loan and keeps the repayment predictable.

If you are stacking the Guarantee with a state-based stamp duty concession or grant, the combination can bring your upfront costs down significantly. Those savings can then sit in an offset linked to the variable portion of a split loan, reducing the interest you pay on that slice while the fixed portion holds your repayment steady.

Split Loans: Fixed Protection with Variable Flexibility

A split loan divides your borrowing into two portions. You might fix 70% of the loan for three years and leave 30% on a variable rate with an offset account. The fixed portion gives you repayment certainty, and the variable portion lets you make unlimited extra repayments, redraw as needed, and use an offset to reduce interest.

This structure suits first home buyers who expect irregular income, such as bonuses, tax refunds, or help from family. The offset absorbs those deposits and works to reduce interest on the variable portion immediately. The fixed portion stays untouched, so you avoid break costs if your circumstances change.

As an example, a buyer borrowing $450,000 might fix $315,000 at a three-year rate and leave $135,000 variable. If they receive a $20,000 grant after settlement and later save another $15,000, that $35,000 sits in the offset linked to the variable split. The effective balance on the variable portion drops to $100,000, which cuts the interest substantially. The fixed portion continues at the locked rate, unaffected by any rate movement during the term.

When to Consider Fixing the Full Amount

If you have minimal savings beyond your deposit and you do not expect windfalls or lump sums in the next few years, fixing the full loan amount can make sense. Your repayment is entirely predictable, and you are not giving up offset benefits you would not have used anyway.

Full fixed loans suit buyers who value certainty above all else and who are confident they will not want to sell, refinance, or make large extra repayments during the fixed term. The trade-off is that you lose all flexibility. If your circumstances change, such as a job relocation or a decision to upgrade sooner than planned, you will either pay break costs or carry the fixed loan with you, which can limit your refinancing options.

For buyers using a first home buyer scheme that involves shared equity or similar arrangements, fixing the full amount can sometimes create complications if the scheme requires you to refinance or adjust the loan within the fixed period. It is worth checking the terms of any government assistance before you lock in.

Fixed Rate Terms: One Year vs Five Years

Shorter fixed terms, such as one or two years, usually come with lower rates but less long-term protection. Longer terms, such as four or five years, offer more certainty but often at a higher rate. The term you choose should match how long you expect to stay in the property and how risk-averse you are about rate rises.

If you are buying a starter home and expect to upgrade within three to five years, a shorter fixed term avoids the risk of break costs when you sell. If you are buying a home you plan to stay in for a decade or more, a longer fixed term can be worthwhile if you believe rates will rise over that period.

In our experience, most first home buyers fix for two or three years. It is long enough to provide meaningful protection but short enough that the fixed term usually expires before major life changes occur. A three-year fix also tends to align with the period when your budget is tightest, the first few years after purchase when your savings are depleted and your income has not yet caught up.

What Happens When the Fixed Term Ends

At the end of your fixed term, your loan automatically reverts to the lender's standard variable rate unless you take action. That revert rate is almost always higher than the variable rate offered to new customers, sometimes by 0.50% or more. If you do nothing, your repayment will increase, often significantly.

Most borrowers either refinance to a new lender or negotiate a new rate with their existing lender about three months before the fixed term expires. If you have been making your repayments on time and your property has increased in value, you will usually have access to better rates than the revert rate. Some lenders will offer you a retention rate without you needing to refinance, but it is worth comparing what is available elsewhere.

If your circumstances have changed during the fixed term, such as an increase in income or a partner added to the loan, refinancing can also be an opportunity to restructure the loan, add an offset, or access equity for renovations or other purposes.

How to Decide Between Fixed, Variable, and Split

The decision comes down to how much uncertainty you can tolerate and what you plan to do with any surplus cash. If you have no savings buffer and your income is stable but modest, fixing most or all of the loan gives you the most predictable path. If you expect bonuses, gifts, or variable income, a split loan with an offset on the variable portion will save you more interest over time.

Variable loans with an offset suit buyers who are disciplined savers and who want maximum flexibility. Fixed loans suit buyers who want to set and forget. A split loan is the middle ground, and it is the structure we see most often with first home buyers who want protection without giving up all their options.

If you are not sure which structure fits your situation, a conversation with a broker can help. We work through your income, your savings pattern, and your plans for the property, and then match that to the loan structure that makes sense for you. Call one of our team or book an appointment at a time that works for you.

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