Variable rate investment loans adjust with market movements, which means your repayment can change as lenders respond to cash rate decisions. For investors who value flexibility over rate certainty, this structure offers features that fixed loans typically don't.
The key difference is what you gain in return for accepting rate movement. Variable products usually come with offset accounts, unlimited extra repayments, and the ability to redraw without penalty. These features matter when you're managing cash flow across a rental property, particularly during vacancies or unexpected maintenance.
Why Investors Choose Variable Rates Over Fixed
Most property investors in Melbourne choose variable rates because they allow you to pay down the loan faster without restriction. Fixed loans typically lock you into set repayment schedules with limited room to make extra payments.
Consider a buyer who purchases a two-bedroom apartment in Werribee as a rental property. Rental income fluctuates depending on tenancy, and body corporate fees might increase unexpectedly. A variable loan with an offset account lets them park surplus rental income to reduce interest without losing access to those funds. If a tenant vacates and they need to cover a repair before re-listing, they can withdraw from the offset immediately. With a fixed loan, those funds would either sit in a separate account earning minimal interest or be locked inside the loan with no access.
Variable loans also suit investors who plan to leverage equity for future purchases. As the property increases in value and the loan balance decreases, you can apply to release equity without triggering break costs. Fixed loans often carry penalties if you adjust the loan structure mid-term.
How Lenders Set Variable Investment Loan Rates
Lenders price variable investment loans higher than owner-occupier loans because the risk profile is different. Investment properties carry additional risk for lenders, as borrowers prioritise their own home during financial stress.
Rates are influenced by the Reserve Bank's cash rate, but lenders don't move in lockstep. Some lenders adjust their variable rates immediately after a cash rate change, while others delay or only pass on part of the movement. This means the rate you start with isn't necessarily the rate you'll have in twelve months, even if the cash rate stays flat.
Rate discounts are negotiated at the time of application and depend on your loan amount, deposit size, and the lender's current appetite for investment lending. A 20% deposit generally unlocks better pricing than a 10% deposit, and loans above a certain threshold often qualify for relationship discounts. These discounts stay with the loan unless you refinance or the lender changes their policy.
Ready to get started?
Book a chat with a Finance & Mortgage Broker at Mortgage and Loans Hub today.
Interest Only Repayments on Variable Investment Loans
Interest only repayments are common on variable investment loans because they reduce the monthly cost and improve cash flow. Instead of paying down both interest and principal, you only cover the interest component for a set period, usually five years.
This structure works when rental income doesn't fully cover the loan repayment, or when you're prioritising debt reduction elsewhere, such as paying down an owner-occupier loan faster. Once the interest only period expires, the loan reverts to principal and interest unless you apply to extend it.
Recent changes to negative gearing mean that if you bought an established residential property after 12 May 2026, losses from that property will only be deductible against rental income or capital gains from residential property from 1 July 2027 onward. For investors holding properties acquired before that date, the existing arrangements remain unchanged. This shift makes cash flow management even more important for new investors, as the ability to offset rental losses against wage income is no longer available under the new rules.
Variable Rate Features That Matter for Investors
The features attached to a variable investment loan often matter more than the headline rate. Offset accounts, redraw facilities, and the ability to make extra repayments all affect how the loan performs over time.
An offset account linked to your investment loan reduces the interest charged without requiring you to deposit funds into the loan itself. If your loan balance is $400,000 and you hold $20,000 in the offset, you're only charged interest on $380,000. The $20,000 remains accessible, which is useful if you need to cover vacancy periods or fund repairs between tenants.
Redraw facilities let you access extra repayments you've made, but not all lenders offer unlimited redraw on investment loans. Some cap the amount you can withdraw or charge fees for each transaction. If you plan to use redraw as a cash flow buffer, confirm the lender's policy before applying.
Portability is another feature worth checking. If you sell the investment property and buy another, some lenders let you transfer the loan to the new property without reapplying. This can save time and avoid the risk of a rate increase between settlement dates.
When a Split Loan Structure Makes Sense
Some investors split their loan between variable and fixed rates to balance flexibility and certainty. You might fix 50% of the loan to lock in repayments on that portion, while keeping the other 50% variable to retain offset and redraw features.
This approach works when you want protection against rate rises but don't want to lose the ability to make extra repayments or access an offset account. The fixed portion gives you predictable cash flow, and the variable portion lets you reduce interest when you have surplus funds.
Split loans do require more active management. You'll have two loan accounts, each with its own terms and repayment schedule. If you decide to refinance your investment loan later, both portions need to be considered, and break costs may apply to the fixed component depending on timing.
Vacancy Rates and Variable Loan Buffers
Lenders assess your ability to service an investment loan based on rental income, but they don't assume 100% occupancy. Most lenders apply a vacancy rate of around 5% when calculating serviceability, meaning they only count 95% of the expected rental income.
If you're purchasing in an area with higher vacancy rates, such as oversupplied apartment precincts in inner Melbourne, lenders may reduce the rental income they're willing to count even further. This affects how much you can borrow and whether the loan will be approved at all.
Variable loans give you more room to manage this risk because you can adjust repayments as rental income changes. If a tenant vacates and you have a two-month gap before re-leasing, you can pause extra repayments or draw from your offset to cover the shortfall. Fixed loans don't offer that flexibility.
How Rate Movements Affect Investment Loan Repayments
When the cash rate moves, your variable loan repayment will eventually follow. A 0.25% increase might not sound significant, but on a $500,000 loan, it can add around $80 to $100 per month depending on whether you're on interest only or principal and interest.
For investors relying on rental income to cover most of the repayment, even small rate increases can tip the property into negative cash flow. This is where an offset account or cash buffer becomes important. If you're holding surplus funds in the offset, rising rates affect a smaller portion of the loan balance.
It's worth running scenarios with different rate assumptions before committing to a variable loan. If a 1% increase would make the property unaffordable, you might be better suited to a fixed rate or a split structure.
Switching from Variable to Fixed Mid-Loan
Most lenders allow you to switch from variable to fixed during the life of the loan, though the process isn't automatic. You'll need to apply for the switch, and the fixed rate you're offered will depend on market conditions at that time, not the rate you started with.
Switching can make sense if you expect rates to rise and want to lock in the current variable rate before it climbs further. However, once you move to fixed, you lose the offset, redraw, and extra repayment features that came with the variable loan.
Some investors switch only a portion of the loan to fixed, leaving the rest variable. This preserves flexibility while adding some protection against future rate increases. You'll need to weigh the cost of potentially higher fixed rates against the value of certainty.
Loan to Value Ratio and Investment Loan Pricing
Your loan to value ratio directly affects the rate and fees on a variable investment loan. Lenders charge higher rates for loans above 80% LVR, and they'll also require you to pay Lenders Mortgage Insurance.
If you're borrowing 90% of the property value, expect to pay a higher interest rate than someone borrowing 70%. The LMI premium can add thousands to your upfront costs, and it's a one-off fee that doesn't reduce your loan balance.
For investors building a portfolio, keeping your LVR below 80% on each property gives you better pricing and avoids LMI. It also leaves room to leverage equity later without crossing the 80% threshold.
Call one of our team or book an appointment at a time that works for you to discuss which loan structure suits your investment strategy.
Frequently Asked Questions
Can I make extra repayments on a variable rate investment loan?
Yes, variable rate investment loans typically allow unlimited extra repayments without penalty. This feature lets you reduce the loan balance faster when you have surplus cash, and many lenders also offer redraw so you can access those extra payments if needed.
How do offset accounts work on investment loans?
An offset account linked to your investment loan reduces the interest charged by offsetting your account balance against the loan balance. For example, if you have a $400,000 loan and $20,000 in the offset, you only pay interest on $380,000 while keeping full access to your $20,000.
Why are variable investment loan rates higher than owner-occupier rates?
Lenders charge higher rates on investment loans because they carry more risk. Borrowers are more likely to prioritise repayments on their own home during financial stress, so lenders price investment loans to reflect that additional risk.
What happens to my variable rate if the cash rate changes?
Your variable rate will usually change in response to cash rate movements, though not all lenders adjust their rates at the same time or by the same amount. A rate increase will raise your repayment, while a rate decrease will lower it.
Can I switch from variable to fixed during my loan term?
Yes, most lenders allow you to switch from variable to fixed, though you'll need to apply and the rate offered will depend on current market conditions. Once you switch, you'll lose variable features like offset accounts and unlimited extra repayments on the fixed portion.
