Common Mistakes First Home Buyers Make with Fixed Rates

Fixed Rate Structure for 5% and 10% Deposit Buyers

A fixed interest rate protects your repayments against rate rises, but the structure you choose depends on whether you are using a 5% or 10% deposit. Buyers entering the market through the Australian Government 5% Deposit Scheme often choose a full fixed term to keep repayments predictable while Lenders Mortgage Insurance would otherwise apply, while those with a larger deposit may split the loan to retain access to offset or redraw features on the variable portion.

Consider a buyer purchasing in Sherwood under the 5% Deposit Scheme. The scheme removes the need for LMI, but it also removes flexibility to refinance easily during the fixed term if circumstances change. Fixing the entire loan for three years gives certainty, but if interest rates fall or the buyer receives a salary increase and wants to make extra repayments, they are constrained unless the lender allows limited additional repayments within the fixed loan terms. Fixing 70% of the loan and leaving 30% variable allows some room to adjust repayments or access funds without triggering break costs, though it does mean part of the loan remains exposed to rate movements.

Buyers using a 10% deposit have more product choice because they avoid LMI in many cases and are not bound by scheme restrictions. A split structure often works well in this scenario because the variable portion can be linked to an offset account, which a fixed loan cannot support. The fixed portion stabilises most of the repayment, and the offset reduces interest on the variable portion if the buyer has savings to park there. This structure balances protection with flexibility.

How First Home Buyer Stamp Duty Concessions Affect Loan Amount

Queensland's first home buyer stamp duty concessions reduce the upfront cost of purchasing, which in turn affects how much you need to borrow and whether a fixed rate is appropriate for the full loan amount. On an established home valued up to $700,000, no transfer duty is payable. Between $700,000 and $800,000, a concession applies. These savings reduce the cash required at settlement, meaning buyers can either borrow less or retain more savings in an offset account if they choose a variable or split loan structure.

In Sherwood, where established homes typically sit within the concession range, a buyer purchasing at the upper end of the threshold may save several thousand dollars in duty. That saving can be directed toward the deposit, reducing the loan-to-value ratio, or held in offset to reduce interest on a variable portion of the loan. If the buyer fixes the entire loan, those savings cannot be used to offset interest, so the benefit is limited to a smaller loan balance rather than ongoing interest reduction. Fixing only part of the loan allows the buyer to retain access to offset on the variable portion, which can be more useful if they expect to accumulate savings over the fixed term.

The concession does not change the interest rate itself, but it does change the financial structure around the loan. Buyers who assume they must fix the entire loan to maximise certainty may inadvertently lock themselves out of offset benefits that would otherwise reduce the total interest paid over time. A split structure preserves both certainty on the fixed portion and flexibility on the variable portion, which is particularly useful for buyers who expect income growth or irregular lump sum payments such as bonuses or tax refunds.

What Happens When a Fixed Rate Ends and You Still Have a Low Deposit

When a fixed rate term ends, the loan automatically reverts to a variable rate unless you refinance or negotiate a new fixed term. If you entered the market with a 5% or 10% deposit and have not built significant equity, refinancing may still attract LMI, which limits your ability to switch lenders for a lower rate. This is a common issue for buyers who fix for two or three years without considering what happens at the end of that term.

In Sherwood, where property values have been steady rather than sharply rising, buyers who purchased with a 5% deposit may find they have only modest equity when their fixed term ends. If variable rates are higher than the original fixed rate, the revert rate offered by the lender may not be competitive. Refinancing to a new lender would require a new valuation and LMI calculation, which could cost several thousand dollars unless the property has increased in value enough to push the loan-to-value ratio below 80%. Buyers in this position are often better served by negotiating a new fixed or variable rate with their existing lender rather than refinancing elsewhere, though this depends on the lender's willingness to offer a retention rate.

Buyers who chose a split structure have more room to adjust at the end of the fixed term because only part of the loan needs to be renegotiated. The variable portion remains on whatever rate the lender offers, and the buyer can choose to fix the entire loan, refix only part of it, or leave everything variable depending on the rate environment at the time. This flexibility is particularly useful in a rising rate environment, where locking in a new fixed rate on the portion that is expiring can limit exposure without requiring a full refinance. For more detail on managing this transition, refer to our page on fixed rate expiry.

Regional First Home Buyer Guarantee and Fixed Rate Eligibility

The Regional First Home Buyer Guarantee is not applicable to Sherwood because the suburb falls within the Brisbane metropolitan area. Buyers in Sherwood must use the standard Australian Government 5% Deposit Scheme, which has a property price cap of $1,000,000 in Brisbane. Fixed rate eligibility is not affected by which scheme you use, but the property price cap does affect the type of home you can purchase and whether a fixed rate is appropriate for the loan size involved.

Buyers using the 5% Deposit Scheme in Sherwood are purchasing within the $1,000,000 cap, which typically means a unit, townhouse, or older house in the suburb. Fixed rates are available on all loan sizes under the scheme, but lenders may offer different fixed rate discounts depending on the loan-to-value ratio and whether the buyer is a first home buyer or an upgrader. A buyer with a 5% deposit may receive a slightly higher fixed rate than a buyer with a 20% deposit, though this varies by lender and is not a universal rule.

If a buyer assumes the Regional Guarantee applies and structures their deposit or loan application accordingly, the application may be delayed or rejected because Sherwood is not classified as a regional area under the scheme criteria. This is a common error for buyers who see the word "regional" and assume it applies to suburbs outside the Brisbane CBD. The Regional Guarantee applies only to areas defined as regional by the Australian Bureau of Statistics, which excludes all of greater Brisbane, including Sherwood, Graceville, Yeronga, and surrounding suburbs. Buyers should confirm their suburb's classification before applying through a lender or speaking with a mortgage broker familiar with first home buyer eligibility.

Split Fixed and Variable Structures for Offset Access

A split loan structure allows you to fix part of your loan and leave the remainder variable, which is useful if you want rate protection on most of your repayments but still need access to an offset account. Fixed rate loans do not allow offset, so any savings you accumulate during the fixed term cannot reduce the interest charged on that portion of the loan. A variable portion linked to an offset account lets you deposit savings and reduce interest on that portion without restriction.

In our experience, buyers who fix the entire loan and then receive an inheritance, bonus, or tax refund during the fixed term often regret not having a variable portion with offset. The fixed loan may allow up to $10,000 or $20,000 in additional repayments per year, but any amount above that limit either cannot be deposited or will trigger an early repayment adjustment. If the buyer has $30,000 to deposit and the fixed loan caps additional repayments at $10,000, the remaining $20,000 sits in a standard savings account earning minimal interest rather than offsetting loan interest at a much higher rate.

A 70/30 or 60/40 split between fixed and variable is a common structure for this reason. The fixed portion provides certainty on the majority of the repayments, and the variable portion with offset gives the buyer somewhere to deposit lump sums without restriction. The exact split depends on how much certainty the buyer wants and how much cash flow variability they expect. Buyers with stable salaries and no expected windfalls may prefer an 80/20 split, while buyers with commission income or irregular bonuses may prefer a 50/50 split to maximise offset access.

First Home Super Saver Scheme and Fixed Rate Timing

The First Home Super Saver Scheme allows you to save up to $50,000 in your superannuation fund and withdraw it for a home deposit. The withdrawal is subject to ATO determination, and buyers generally need to obtain that determination before signing a purchase contract. Fixed rate availability and pricing can change quickly, so buyers using the FHSS should confirm the withdrawal timeline before locking in a fixed rate, particularly if the fixed rate offer from the lender expires before the ATO determination is received.

Consider a buyer in Sherwood who has $40,000 saved through the FHSS and applies for the determination in the same month they find a property. The ATO determination can take several weeks, and the property settlement may be scheduled for 30 or 60 days after contract signing. If the buyer applies for pre-approval and locks in a fixed rate before receiving the FHSS funds, the lender may require proof of the deposit before formally approving the loan. If the determination is delayed, the fixed rate lock may expire, and the buyer may need to accept whatever rate is available at the time the funds are released. This can result in a higher fixed rate than originally quoted, particularly in a rising rate environment.

Buyers should apply for the FHSS determination as early as possible, ideally before beginning property inspections, so the funds are available when an offer is made. Once the determination is received and the funds are accessible, the buyer can proceed with the loan application and fixed rate lock without delay. Lenders typically hold a fixed rate for 90 days, which is sufficient for most settlements, but any delay in receiving the FHSS funds reduces that window and increases the risk that the rate will expire before settlement.

Call one of our team or book an appointment at a time that works for you. We will review your deposit structure, confirm your eligibility for applicable concessions and schemes, and recommend a fixed or split rate structure that aligns with your repayment flexibility and offset needs. You can book an appointment at our Sherwood office or speak with us by phone.

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