A fixed rate investment loan protects your repayments from rate rises, but exiting early can cost thousands. Break costs apply when you pay out, refinance or increase borrowings before the fixed term ends, and the calculation is tied to the difference between your locked rate and wholesale rates at the time you exit.
What a Rate Lock-in Means for an Investment Loan
Locking a rate means you fix the interest rate for a set period, usually one to five years. During that time, your interest cost does not move if the Reserve Bank raises or lowers rates. You pay the same amount each month for the life of the fixed period, which helps with budgeting rental yield and cashflow. Variable rates change with market conditions, so repayments go up or down. For investors relying on interest only investment loans, a fixed rate removes one element of uncertainty while the property generates rental income.
Fixed investment loans typically limit extra repayments to around ten or twenty thousand per year, and you cannot access a redraw facility or offset account during the fixed term. If you need to refinance to release equity for another deposit, or if you redeploy and decide to sell, you will trigger break costs unless the fixed term has expired.
How Lenders Calculate Break Costs
Break costs are not a flat fee. The lender calculates the economic loss it incurs by releasing you from the fixed contract. When you locked in at 5.8 per cent and wholesale swap rates are now 4.2 per cent, the lender has to reinvest your principal at a lower return. The break cost covers that shortfall across the remaining fixed period.
The calculation uses your outstanding loan balance, the difference between your fixed rate and the current wholesale rate, and the time left on the fixed term. A larger loan amount and a longer remaining period produce a higher break cost. If wholesale rates have risen above your fixed rate, the break cost is usually zero because the lender can reinvest at a higher return.
Consider an investor who locked 400,000 at 5.8 per cent for four years. Two years in, the member receives posting orders to Townsville and wants to sell the Brisbane unit. Wholesale rates have dropped to 4.5 per cent. The lender calculates a break cost across the remaining two years on the full balance. In this scenario, the break cost sits in the range of twelve to sixteen thousand, depending on the lender's funding arrangements. That cost is deducted from the settlement payout, reducing net sale proceeds before you factor in agent fees and capital gains.
Ready to get started?
Book a chat with a Finance & Mortgage Brokers at Defence Loans today.
When Break Costs Are Zero or Waived
Break costs disappear if wholesale rates rise above your locked rate. During the fixed rate rises through late 2022 and 2023, many borrowers who locked at 2 or 3 per cent faced zero exit penalties because the replacement cost to the lender was lower than the original contract. If you are considering an exit, ask your broker to request a break cost estimate from the lender before you commit to a sale or refinance.
Some lenders waive break costs when you refinance internally to another fixed rate or if you port the loan to a new property. Porting means you transfer the existing fixed loan to your next investment without breaking the contract. Not all lenders offer porting, and the new property must settle before the fixed term expires. For ADF members who move frequently, understanding which lenders allow porting before you lock the rate can preserve flexibility without sacrificing rate certainty.
The Timing Risk When Fixed Rates Fall
Locking in a rate protects you from rises but locks you out of falls. If the Reserve Bank cuts rates halfway through your fixed term, variable borrowers see immediate repayment reductions while you continue paying the higher fixed rate. That difference compounds over time, and the only way to access the lower rate is to break the contract and pay the exit cost.
In our experience, investors who fixed near the top of the rate cycle in 2023 now face higher holding costs than those on variable rates. If rental vacancy increases or you need to access equity release to fund the next deposit, the break cost becomes a barrier. Splitting your loan, part fixed and part variable, gives you some protection from rises while keeping a portion able to respond to rate cuts or early repayment without penalty.
Fixed Versus Variable for ADF Investors Under the New Negative Gearing Rules
From 1 July 2027, net rental losses on residential properties acquired after 7:30pm on 12 May 2026 can only be offset against other residential rental income or carried forward. Losses cannot reduce your taxable salary. Eligible new builds purchased after that date retain full negative gearing, meaning interest deductions still reduce assessable income from all sources.
A fixed rate on a new build investment loan gives certainty over your deductible interest cost and protects cashflow if rates rise during construction and the first years of tenancy. If you are financing an established dwelling acquired after the cut-off, the tax benefit of negative gearing is quarantined, so cashflow becomes more critical. A variable rate offers flexibility to make extra repayments or refinance without penalty if your circumstances change, while a fixed rate may lock you into higher repayments with no ability to exit affordably if you need to adjust your investment loan strategy.
Splitting the Loan to Manage Break Cost Risk
Splitting the loan places part of the balance on a fixed rate and the rest on variable. You might fix 60 per cent and leave 40 per cent variable, or any other ratio that suits your risk tolerance. The variable portion allows extra repayments, redraw and offset access, and you can refinance or increase that part without triggering break costs. The fixed portion gives you repayment certainty on the majority of the loan.
For ADF investors managing multiple postings, a split structure reduces the penalty if you need to sell or refinance partway through the fixed term. You only pay break costs on the fixed portion, and the variable portion exits without charge. If you plan to expand your property portfolio and need to refinance for equity release within a few years, keeping at least part of the loan variable preserves that option without a five-figure exit fee.
Reading the Fine Print on Partial Prepayments and Break Fee Waivers
Most lenders allow annual prepayments of ten to thirty thousand on a fixed investment loan without penalty. That limit resets each year on the anniversary of settlement. If you make an extra payment above the threshold, break costs apply only to the excess amount, not the full prepayment. Some lenders calculate break costs daily, others use a simplified formula that may round in your favour. The product disclosure statement sets out the calculation method, the prepayment cap and any circumstances where break costs are waived.
If you are posted and selling becomes unavoidable, request a break cost estimate in writing at least two weeks before settlement. The estimate is usually valid for seven days. Break costs fluctuate with daily movements in wholesale swap rates, so the figure can change between the estimate and the payout. Locking in your settlement date as soon as contracts exchange reduces the chance of a surprise increase in the exit cost.
Deciding when to lock, how much to fix and whether to split depends on your posting cycle, your plans for portfolio growth and your tolerance for repayment variability. If you are weighing up investment loan refinancing or looking to structure a new loan that fits the changes coming in 2027, call one of our team or book an appointment at a time that works for you.
Frequently Asked Questions
What are break costs on a fixed rate investment loan?
Break costs are the fee charged by a lender when you exit a fixed rate loan before the term expires. The lender calculates the economic loss by comparing your locked rate to current wholesale rates and applying the difference over the remaining fixed period.
Can I avoid break costs if I need to sell my investment property?
Break costs are zero if wholesale rates have risen above your fixed rate. Some lenders also waive the fee if you port the loan to a new property or refinance internally to another fixed product. Otherwise, the cost is unavoidable if you exit early.
Does splitting my investment loan reduce break costs?
Splitting reduces the balance subject to break costs because only the fixed portion incurs the fee. The variable portion can be paid out, refinanced or increased without penalty, giving you more flexibility if your circumstances change.
How do the 2027 negative gearing changes affect fixed rate decisions?
Properties acquired after 12 May 2026 can only offset rental losses against other rental income unless they are eligible new builds. A fixed rate gives repayment certainty but limits your ability to adjust the loan structure without cost, which matters more when tax benefits are quarantined.
When should I request a break cost estimate?
Request an estimate at least two weeks before settlement if you are selling or refinancing. The estimate is valid for around seven days and fluctuates with daily wholesale rate movements, so timing the request close to payout reduces the risk of changes.
