How to Lock In a Fixed Rate for Your First Home

Why First Home Buyers Consider Fixed Rates

Fixed interest rates appeal to first home buyers because they lock in repayments at a set amount for a chosen period, usually between one and five years. During that time, your repayments won't move even if the Reserve Bank changes the cash rate or lenders adjust their pricing. For someone buying in Wentworthville and juggling a new mortgage alongside other costs, knowing exactly what leaves your account each fortnight can remove a lot of uncertainty.

The trade-off is flexibility. Most fixed rate products don't come with an offset account, limit how much extra you can repay each year without penalty, and charge break costs if you need to exit early. If rates fall during your fixed period, you're still locked into the higher rate unless you're willing to pay to get out.

What You Give Up When You Fix

You lose access to an offset account in most cases. An offset account sits alongside your home loan and reduces the interest you're charged based on the balance you keep in it. If you have $20,000 in offset and owe $500,000, you only pay interest on $480,000. That can shave years off a loan and save tens of thousands in interest over time, but it requires a variable rate loan in almost every scenario.

Fixed loans also cap how much extra you can repay. Most lenders allow between $10,000 and $30,000 in additional repayments per year on a fixed loan. If you receive a bonus, tax return, or inheritance and want to throw it at the mortgage, you'll either hit that cap or trigger a break cost. Variable loans let you pay as much as you want, whenever you want.

Redraw is often still available on fixed products, meaning you can access any extra repayments you've made within the annual limit. But the fact that the limit exists in the first place can feel restrictive if your income is variable or you're expecting lump sums.

How Fixed Rates Are Priced Right Now

Fixed rates move based on what lenders expect the Reserve Bank to do over the next few years, not what the cash rate is today. That means fixed rates can sit above or below variable rates depending on market sentiment. Right now, most lenders are pricing fixed terms with the expectation that rates will stay relatively stable or ease slightly, so you'll often see fixed and variable rates sitting fairly close together.

That doesn't mean fixing is always the wrong move. It just means you're not locking in a bargain compared to variable the way you might have been a few years ago. You're paying for certainty, not necessarily a discount.

If you're stretching your budget to buy in Wentworthville, particularly around the Wentworthville station precinct where unit stock has been popular with first home buyers, knowing your repayment won't jump can be worth more than the potential upside of a variable loan. But if you've got breathing room in your budget and want the flexibility to smash the loan down, variable might serve you harder in the long run.

The Split Strategy That Works for Some Buyers

You don't have to pick one or the other. Most lenders let you split your loan so part of it is fixed and part is variable. A common approach is to fix 50% to 70% of the loan for certainty, then keep the rest variable so you can still make extra repayments and use an offset account on that portion.

Consider a buyer borrowing $550,000 to purchase a unit near Dunmore Street. They fix $400,000 at a set rate for three years and leave $150,000 variable. The fixed portion gives them a known repayment floor, while the variable portion lets them park savings in offset and chip away at the loan without hitting a cap. If rates drop, they benefit on the variable portion. If rates rise, the fixed portion shields them from the full impact.

The split has to match how you actually manage money. If you're disciplined about keeping a buffer in offset and making extra repayments, it's a solid middle ground. If you're more hands-off and just want to set and forget, a full fix might suit you fine. There's no universal formula, and anyone who tells you there is hasn't looked at your income, spending, or risk tolerance.

What Happens When Your Fixed Term Ends

When your fixed period finishes, your loan automatically rolls onto the lender's standard variable rate unless you do something about it. That standard rate is almost always higher than the discounted variable rate the lender offers to new customers, sometimes by 0.5% or more. On a $500,000 loan, that difference can mean an extra $200 or more per month.

Most borrowers either refinance to a new lender or negotiate a new rate with their current lender around six months before their fixed term ends. If you've been making repayments on time and your financial position has improved since you first bought, you're in a strong position to refinance and secure a lower rate. If your situation has stayed the same or worsened, you might be stuck with whatever your current lender offers unless you can demonstrate serviceability to a new one.

Planning for this before your fixed term ends is not optional. Lenders won't remind you to do it. The rollover just happens, and you'll see the new repayment amount on your next statement.

How to Choose Between One, Three, or Five Year Fixed Terms

Shorter fixed terms cost you less in break fees if you need to exit early, and they let you reassess sooner. Longer terms lock in certainty for a bigger slice of time but reduce your options if your circumstances change. If you think there's a chance you'll sell, refinance, or want to access equity within a few years, a one or two year fix keeps your options open.

If you're confident you'll stay in the property and your income is stable, a three to five year fix can make sense. Just be honest about the likelihood of life changing. First home buyers often underestimate how much can shift in five years, from career moves to relationships to growing families. A five year fix at age 27 might feel very different at age 32.

What Low Deposit Options Mean for Your Fixed Rate Choice

If you're using the First Home Guarantee to buy with a 5% deposit, you'll pay Lenders Mortgage Insurance (LMI) unless the loan is backed by the government scheme. The First Home Guarantee now has no income cap and allows purchases anywhere in Australia, including Wentworthville. Once you're approved, you can choose either a fixed or variable rate, or split between the two.

The key thing is that LMI is calculated at settlement and added to your loan balance. Whether you fix or stay variable after that doesn't change the LMI amount. What does matter is whether you want the flexibility to make extra repayments and get under 80% loan-to-value ratio sooner, which would put you in a stronger position to refinance down the track. If that's a priority, keeping at least part of the loan variable makes it easier to chip away at the balance.

Wentworthville buyers using a low deposit option often lean toward a split or full variable structure so they can take advantage of any extra cash and build equity faster. Fixing the whole amount can feel safe, but it also means you're stuck with a high loan balance for the full fixed term unless you're prepared to pay break costs.

When Break Costs Actually Get Triggered

Break costs apply when you pay out a fixed loan before the term ends. That includes selling the property, refinancing to another lender, or making extra repayments beyond the annual cap. The cost is based on the difference between the rate you're locked into and the rate the lender can now lend that money out at, multiplied by the remaining term.

If you fixed at 6% for five years and rates have since dropped to 5%, the lender has lost the opportunity to earn that extra 1% for the remainder of your term. You're compensating them for that loss. The calculation involves wholesale swap rates and isn't something most borrowers can estimate accurately without asking the lender directly.

In practice, break costs can range from a few hundred dollars to tens of thousands depending on how much rates have moved and how much time is left. If you think there's any chance you'll need to move, refinance, or access equity before your fixed term ends, get a break cost estimate from your lender before committing. Don't assume it'll be small.

How to Apply for a Fixed Rate Home Loan

The home loan application process is the same whether you choose fixed, variable, or split. You'll need proof of income, savings history, identification, and details of the property you're buying. Lenders assess your ability to service the loan at a buffer rate, usually around 3% above the actual rate, to make sure you can still afford repayments if rates rise.

Once you're approved, you can lock in a fixed rate. Most lenders let you hold that rate for 90 days while you find a property or wait for settlement. If rates rise during that period, you're protected. If they fall, you're stuck unless the lender offers a one-time re-lock, which some do and some don't.

Pre-approval doesn't lock in a rate. It just confirms how much you can borrow. The rate lock happens later, closer to settlement. If you're buying at auction or in a hot market, knowing you can lock a rate quickly once your offer is accepted gives you one less thing to worry about during a stressful few weeks.

Call one of our team or book an appointment at a time that works for you. We'll walk through your deposit, income, and buying timeline, then show you what fixed, variable, and split options look like across multiple lenders so you can decide what fits.

Frequently Asked Questions