Simple hacks to make extra repayments on fixed rate loans

Fixed rate home loans usually cap the extra repayments you can make each year without penalty.

Most lenders allow between $10,000 and $30,000 in additional repayments annually on a fixed rate home loan before break costs apply. That limit resets each year on the anniversary of your settlement date, not the calendar year. Some lenders calculate the cap as a percentage of your original loan balance rather than a flat dollar amount, so a loan of $600,000 might allow 5% or $30,000 in extras per year, while a $400,000 loan at the same percentage would cap you at $20,000.

For oncology pharmacists working in public or private hospital settings, this structure can feel restrictive when your income includes shift penalties, weekend loadings, or occasional locum work that creates surplus cash you'd prefer to put toward your mortgage.

How the annual cap on extra repayments works

The cap applies per fixed rate period, not per loan. If you have a split loan with $300,000 fixed and $200,000 variable, the $10,000 to $30,000 cap applies only to the fixed portion. Your variable portion accepts unlimited extras without penalty.

Consider an oncology pharmacist who secured a three-year fixed rate in early 2025 and now wants to make additional repayments using income from a clinical trial project. Their lender allows $20,000 in extras per year on the fixed portion. They make $15,000 in extra repayments by October. In November, they receive another $8,000 from the trial work. They can apply $5,000 to the fixed loan to reach the $20,000 cap, then redirect the remaining $3,000 to an offset account linked to their variable split, or hold it until the cap resets on their loan anniversary.

The annual reset is tied to your settlement date, not the financial year. If you settled on 14 March, your cap resets on 14 March each year for the duration of the fixed term. Lenders do not prorate the cap if you make extra repayments mid-year.

What happens if you exceed the cap

Break costs apply when you exceed the annual extra repayment cap or exit a fixed rate loan early. The cost reflects the difference between your fixed rate and the rate your lender can now earn by reinvesting the funds you've repaid early. If current rates are lower than your fixed rate, the break cost can be substantial. If current rates are higher, the break cost may be nil.

Break costs are calculated using a present value formula that discounts the lost interest over the remaining fixed term. Your lender is required to provide a discharge or break cost estimate on request, and that estimate is usually valid for a short period such as 7 to 10 days. Break costs are not static and fluctuate with wholesale rate movements.

In a scenario where an oncology pharmacist wants to refinance to access equity for an investment property but still has 18 months remaining on a fixed term, they would need to compare the break cost against the potential benefit of the refinance. If the break cost is $8,000 but the refinance unlocks $50,000 in usable equity and reduces the ongoing rate by 0.4%, the benefit may justify the cost. If the break cost is $15,000 and the rate saving is marginal, waiting until the fixed term expires is usually the more practical choice. You can explore refinancing scenarios further at home loan refinancing for pharmacists.

Using an offset account on a split loan structure

A split loan divides your borrowing between fixed and variable portions. The variable portion typically includes access to an offset account, which is a transaction account linked to your home loan. Funds in the offset reduce the interest charged on your variable loan balance without being locked into the loan itself.

If you have a $500,000 loan split 60% fixed and 40% variable, the variable portion is $200,000. If you hold $30,000 in your offset account, interest is charged only on $170,000 of the variable portion. The fixed portion continues to accrue interest on its full balance regardless of offset funds.

This structure works particularly well for oncology pharmacists whose income fluctuates with shift work, overtime, or short-term contracts. You can deposit surplus income into the offset without exceeding your fixed rate cap, and withdraw funds when needed for professional development, vehicle purchases, or other expenses without re-applying for credit. More detail on how offset accounts interact with different loan structures is available at interest only loans for pharmacists.

Choosing your split ratio based on repayment goals

The percentage you allocate to fixed versus variable should reflect how much flexibility you expect to need during the fixed term. A 50/50 split provides moderate rate certainty and moderate repayment flexibility. A 70/30 split favours certainty but limits your capacity to make larger extra repayments. A 30/70 split prioritises flexibility but exposes you to rate rises on the majority of your loan.

An oncology pharmacist planning to increase their income over the next two years through a promotion to senior clinical pharmacist or taking on education coordinator duties might choose a 40% fixed, 60% variable split. The fixed portion stabilises their minimum repayment, while the variable portion absorbs extra repayments as their income grows. If they later decide to purchase an investment property, the variable portion can be refinanced or restructured without triggering break costs on the fixed component. Investment loan structures are covered in more detail at investment loans for pharmacists.

You can adjust your split ratio at the end of each fixed term. If your fixed rate expires and you re-fix, you can change the split percentage at that time based on your current income and repayment intentions.

Paying down your loan faster once the fixed term ends

When your fixed rate expires, your loan typically reverts to a variable rate unless you choose to re-fix. At that point, all caps on extra repayments are removed and you can make unlimited additional repayments without penalty.

If you've been capped at $20,000 per year in extras during a three-year fixed term, you might have built up savings in an offset or high-interest account during that period. Once the loan reverts to variable, you can apply those savings as a lump sum. The interest saving from making a large repayment at the start of a variable period is higher than spreading smaller repayments across the fixed term, because each dollar repaid reduces the principal on which interest compounds.

For oncology pharmacists who receive annual performance bonuses or complete paid research work outside their hospital role, timing a large repayment to coincide with the end of a fixed term can reduce the total interest paid over the life of the loan. Borrowing capacity considerations for future purchases are also influenced by how much you reduce your loan balance, as discussed at borrowing capacity.

Call one of our team or book an appointment at a time that works for you to discuss how your current loan structure supports your repayment goals and whether a split loan or offset account would reduce your interest costs without limiting your access to funds.

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