Why Fixed Rate Terms Matter for ADF Investors
Fixed rate terms on investment loans give you repayment certainty for a set period, typically one, two, three or five years. That certainty matters when you're deployed, posted or working unpredictable hours and need to know your rental property cashflow won't shift mid-year.
The choice of term length affects more than just the rate you lock in. Longer fixed terms often carry higher rates than shorter ones, reflecting the lender's pricing for interest rate risk over time. Shorter terms offer lower rates but require you to refinance or revert to variable sooner. Either way, the term you choose should align with how long you plan to hold the property, your income stability and whether you expect rates to move.
Consider an ADF member posted to RAAF Base Pearce who purchases a rental property in Ellenbrook. They fix the investment loan at a three-year term because their posting cycle is roughly three years and they want stable repayments while managing tenancy turnover remotely. The three-year term gives them breathing room without locking them into a rate beyond their likely posting window. At the end of the fixed period, they can reassess whether to fix again, switch to variable or refinance depending on where rates sit and whether they're still holding the property.
Under current prudential rules, lenders assess your serviceability at a buffer of at least 3.0 percentage points above the loan product rate, regardless of whether you choose fixed or variable. That assessment applies at the time you take out the loan. Once you're locked into a fixed rate, your actual repayments won't change during the fixed period, but your borrowing capacity for any future lending will still be tested at the higher buffered rate.
One-Year Fixed Terms: When Short Suits the Strategy
A one-year fixed term locks in your investment loan rate for 12 months only. Lenders typically price one-year fixed rates lower than longer terms because they carry less interest rate risk for the bank. For ADF members, a one-year term works when you're uncertain about your next posting, planning to sell the property within a year or expect variable rates to fall in the near term.
The downside is frequency. You'll need to make a decision every 12 months about whether to refix, switch to variable or refinance. That can be manageable if you're based in Australia with stable internet access, but harder to coordinate from a ship or remote deployment. If you do nothing at the end of the fixed period, your loan will revert to the lender's standard variable rate, which is often higher than the discounted variable rate you could negotiate.
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Three and Five-Year Fixed Terms: Longer Certainty With Trade-Offs
Three and five-year fixed terms are the most common choices for ADF investors who want repayment stability across a full posting cycle or longer hold period. A three-year term typically offers a middle ground between rate competitiveness and certainty. A five-year term provides maximum stability but usually at a higher rate and with more restrictive loan features.
Most fixed rate investment loans for ADF members limit extra repayments to around $10,000 to $30,000 per year during the fixed period. Some lenders allow no extra repayments at all. If you plan to make large lump sum payments from allowances, bonus pay or a future sale, a variable rate or shorter fixed term may suit you more. Offset accounts are also uncommon on fixed rate investment loans, meaning any surplus cash sits in a separate account earning taxable interest rather than reducing the loan balance.
Break costs apply if you repay the loan in full, refinance or increase repayments beyond the allowed limit during the fixed period. The cost is calculated based on the difference between your fixed rate and the lender's current wholesale funding cost for the remaining term. If rates have fallen since you fixed, the break cost can be substantial. If rates have risen, the break cost may be zero or you may even receive a rebate. ADF members posted interstate or overseas who need to sell the investment property before the fixed term ends should factor in the possibility of a break cost when choosing the term length.
Split Rate Structures: Fixed and Variable Combined
A split rate structure divides your investment loan into two portions, one fixed and one variable. The split can be any proportion, such as 50-50, 60-40 or 70-30. The fixed portion gives you repayment certainty, while the variable portion gives you flexibility to make extra repayments, access an offset account and avoid break costs if you need to refinance or sell.
In our experience, ADF members with irregular income streams, such as those receiving allowances that vary by posting location, often benefit from a split structure. The variable portion absorbs extra repayments when allowances are high, while the fixed portion anchors the overall repayment at a known level. This approach also spreads your refinancing decisions over time rather than forcing a single all-or-nothing choice every few years.
If you're considering a split, check whether the lender applies separate account-keeping fees to each portion. Some lenders charge two sets of fees, which can add $300 to $800 per year depending on the product. Others charge a single fee for the whole facility. Also confirm whether the variable portion qualifies for the same rate discount as a standalone variable loan, as some lenders reserve their sharpest discounts for single-product relationships.
What Happens at Fixed Rate Expiry
When your fixed term ends, your loan reverts to the lender's standard variable rate unless you take action beforehand. The standard variable rate is typically 0.5 to 1.5 percentage points higher than the discounted variable rate the lender offers to new or refinancing customers. That difference can add several thousand dollars per year to your repayments on a typical investment loan amount.
Most lenders will contact you 30 to 90 days before your fixed term expires and offer you the option to refix at a new rate or switch to a discounted variable product. You're not required to accept that offer. You can also refinance your investment loan to a different lender if another institution offers a lower rate or features that suit your circumstances, such as portability for interstate postings or the ability to increase the loan amount without a full reapplication.
If you know your fixed term is ending while you're deployed or at sea, arrange the refinance or rate switch before you leave. Lenders need to verify your identity, income and property details, and those checks are harder to complete from a restricted communications environment. A broker can coordinate the timing and paperwork on your behalf, but you'll still need to provide current payslips, tax returns and authority to act.
Interest-Only Fixed Terms and Cashflow Planning
Most investment loans allow you to fix the rate on an interest-only repayment structure for up to five years. After the interest-only period ends, the loan reverts to principal-and-interest repayments, which will be higher because the principal is now being repaid over the remaining loan term. If you fix a five-year interest-only term and the total loan term is 30 years, the principal will be repaid over the remaining 25 years once the interest-only period ends, increasing the repayment amount.
ADF members using interest-only loans to maximise tax deductions and cashflow should plan for the repayment step-up before it happens. If your fixed interest-only term ends while you're posted overseas and your rental income hasn't increased, the higher repayment amount may exceed your passive income. You can refinance to extend the interest-only period, but that requires a new serviceability assessment, and lenders are less willing to approve long-term interest-only extensions on investment loans at high loan-to-value ratios.
Under APS 112, long-term interest-only residential loans with an LVR above 80 per cent and a contractual interest-only period exceeding five years or with no specified end date are classified as non-standard and attract higher capital costs for the lender, which flows through to pricing. Most lenders now cap interest-only periods at five years for new investment loans, regardless of the LVR.
Refinancing Before or After a Fixed Term
Refinancing an investment loan during a fixed term triggers break costs, as noted earlier. Refinancing after the fixed term expires avoids those costs entirely. If you're weighing whether to refinance now or wait until the fixed term ends, calculate the interest saving from the new loan over the remaining fixed period, subtract the estimated break cost and compare the net outcome.
Your lender is required to provide a break cost estimate on request. The estimate is based on current market rates and the remaining term, but the actual break cost will be calculated using the wholesale rates on the day you discharge the loan. If rates are volatile, the final figure may differ from the estimate.
ADF members who have built equity in their investment property since taking out the original loan may be able to refinance at a lower LVR, which can unlock lower rates and remove the need for lenders mortgage insurance on any additional borrowing. If you're expanding your property portfolio, refinancing an existing investment loan to release equity can fund the deposit on a second property without selling the first.
Call one of our team or book an appointment at a time that works for you. We'll walk through your current fixed term, your options at expiry and whether refinancing now or later makes sense for your posting cycle and investment goals.
Frequently Asked Questions
What fixed rate terms are available on investment loans for ADF members?
Fixed rate terms on investment loans are typically available for one, two, three or five years. Shorter terms usually offer lower rates, while longer terms provide more certainty but often at a higher rate and with more restrictive features such as limited extra repayments.
What happens when my fixed rate investment loan term expires?
When your fixed term ends, your loan reverts to the lender's standard variable rate unless you take action beforehand. Most lenders contact you 30 to 90 days before expiry to offer a new fixed rate or discounted variable product, or you can refinance to another lender.
Can I make extra repayments on a fixed rate investment loan?
Most fixed rate investment loans limit extra repayments to around $10,000 to $30,000 per year during the fixed period. Exceeding that limit or repaying the loan in full before the term ends may trigger break costs.
What are break costs on a fixed rate investment loan?
Break costs apply if you repay, refinance or increase repayments beyond the allowed limit during the fixed period. The cost is based on the difference between your fixed rate and the lender's current wholesale funding cost for the remaining term.
Should I fix my investment loan rate for one year or five years?
A one-year term suits ADF members who expect to sell the property soon, anticipate falling rates or want to reassess annually. A five-year term suits those wanting maximum repayment certainty across a full posting cycle, but usually at a higher rate and with less flexibility for extra repayments.
