Fixed rate investment loans lock your interest rate for a set period, usually between one and five years.
That certainty can be valuable when you are managing rental income and deductions on an investment property, but it also limits how much you can repay early and can create a breakage cost if you need to exit before the term ends. With changes to negative gearing and capital gains tax taking effect in July 2027, the interplay between rate certainty and financial flexibility has become more relevant for property investors in Miami and across the Gold Coast.
How fixed rate investment loans differ from variable
A fixed rate investment loan holds your interest rate steady for the term you choose, while a variable rate moves with market conditions and lender pricing.
The clearest difference is predictability. When you fix, your repayments remain the same regardless of what the Reserve Bank does. That can make budgeting simpler when you are covering the gap between rent and your loan costs, particularly in the first few years of ownership. Most lenders also cap how much you can pay above the scheduled amount during a fixed term, typically around $10,000 to $30,000 per year depending on the product. If you repay more than that or want to refinance or sell before the term ends, the lender may charge a break cost based on the difference between your fixed rate and the current wholesale rate. Variable products, by contrast, allow unlimited extra repayments and no break costs when you exit.
Interest-only repayments on a fixed rate
Many investors choose interest-only repayments on a fixed rate loan to reduce their monthly outgoings and maximise the cash flow they can allocate to other holdings or living costs.
Under an interest-only structure, your repayment covers only the interest charge each month. The principal does not reduce, which means your loan balance stays the same across the interest-only period. That period is usually capped at five years, after which the loan reverts to principal-and-interest unless you negotiate a further interest-only extension with the lender. Combining interest-only with a fixed rate gives you known repayments for the full term, which can help when you are factoring in rental income that may fluctuate due to vacancies or tenant turnover. The downside is that you are not building equity through repayment, so any equity gain relies entirely on property value growth. When the interest-only period ends, your repayment will increase because you are now repaying principal over a shorter remaining term.
What happens to deductions when negative gearing rules change in 2027
From 1 July 2027, rental losses on most established residential investment properties purchased after 7:30pm on 12 May 2026 can no longer be offset against your salary or other non-rental income.
If you bought an established unit in Miami after that date and time, any shortfall between your rental income and your loan interest, body corporate fees and other costs must be quarantined. You can carry those losses forward and use them against future rental income from any residential property you own, or against the capital gain when you eventually sell. Properties you already owned before that cut-off, including those under contract at the time, continue under the old rules and remain negatively geared in the traditional sense until you sell. The exception is new builds that increase the housing supply. If you purchase a newly constructed dwelling on previously vacant land, or a property where the number of dwellings has increased, you can still offset losses against your wage income under the existing rules. That carve-out is designed to encourage construction, and it may shift investor demand toward new apartments and townhouses over established stock in suburbs like Miami where older low-rise units have historically been popular.
Ready to get started?
Request a Callback with a Finance & Mortgage Broker at ATS Finance Now today.
Fixed rate features that support or limit flexibility
Most fixed rate investment products include an offset account or redraw facility, but the functionality is more restricted than on a variable loan.
An offset account linked to a fixed rate loan typically offsets only a portion of your balance, often up to $10,000 or $50,000 depending on the lender. Any balance beyond that cap does not reduce your interest charge. Redraw is usually available, but many lenders impose conditions such as minimum redraw amounts or restrictions on how often you can access funds. If you are planning to use surplus rental income or tax refunds to build a buffer, check the redraw rules before you settle. Some lenders also allow you to split your loan, fixing part and leaving part variable. That structure lets you lock in certainty on a portion while keeping flexibility and full offset on the remainder. Splitting can be particularly useful if you expect to refinance your investment loan within a few years or if you want the option to pay down principal faster without triggering break costs.
Rate lock and the timing risk in a rising or falling market
When you apply for a fixed rate loan, most lenders let you lock the rate for 90 days while your application and settlement progress.
That rate lock protects you if fixed rates rise during that period, but it also means you cannot switch to a lower rate if the market moves down before you settle. In a falling rate environment, that can feel like a missed opportunity, particularly on a large loan amount where even a small rate difference compounds over time. If you are purchasing an investment property in Miami and expect settlement within 60 days, a rate lock can provide certainty. If settlement is likely to take longer due to construction delays or contract conditions, you may prefer to leave the rate floating and take the market rate at settlement. The risk is that rates move against you. The decision depends on your view of rate direction and your tolerance for repayment uncertainty once the loan is active.
Managing break costs if you need to exit early
A break cost arises when you repay a fixed loan before the end of the term and the lender's wholesale funding cost has fallen below the rate you are paying.
The lender calculates the economic loss it will incur by using the difference between your fixed rate and the current swap rate for the remaining term, then applies that difference to your outstanding balance. Break costs can range from a few hundred dollars to tens of thousands depending on how far rates have moved and how much time is left on your fixed term. If you bought a unit in Miami 18 months ago and fixed at 6.5 per cent for three years, and the equivalent fixed rate today is 5.8 per cent, you will likely face a break cost if you sell or refinance now. The lender will provide a break cost estimate on request, and you should ask for one before you commit to selling or switching lenders. Some borrowers choose to port the loan to a new property if the lender offers that feature, though porting is less common on investment loans than on owner-occupied products.
Portability and the option to transfer your fixed rate
Portability lets you transfer your existing fixed rate loan to a new property without breaking the contract or paying an exit fee.
Not all lenders offer portability on investment products, and those that do often require the new property to meet their current lending policy, including loan-to-value ratio and serviceability tests. If you are planning to sell your current investment and buy another within a short window, portability can save you the break cost and the cost of establishing a new loan. The catch is that you need to settle the purchase before or at the same time as you settle the sale, and the loan amount must stay the same or reduce. If you need to borrow more for the new property, the additional amount will be on a separate loan at the rate available at the time. Portability works in niche situations, but it is not a substitute for a loan structure that suits your medium-term plans from the outset.
How the new capital gains rules interact with fixed terms
From 1 July 2027, capital gains on investment properties purchased after 12 May 2026 will be taxed using cost base indexation and a minimum 30 per cent rate on real gains, replacing the 50 per cent discount for most investors.
If you are fixing a loan today on a property you bought after that cut-off, your hold period will straddle the transition date. The new rules apply only to the portion of the gain that accrues after 1 July 2027, so gains up to that date are still calculated under the existing discount method. That split calculation may influence how long you hold the property and whether a fixed term aligns with your intended sale timeline. If you are planning to hold for seven to ten years to build equity, a three-year fixed term gives you certainty through the transition and lets you reassess your rate and structure before the final years of the hold. If you are planning a shorter hold, locking in for the full period may limit your ability to respond if rental demand softens or if you want to leverage equity for a second purchase.
Choosing a fixed term that aligns with your investment strategy
The right fixed term depends on how long you plan to hold the property, your cash flow tolerance, and whether you expect to need access to equity within the next few years.
A one- or two-year fixed term suits investors who want short-term certainty but expect to refinance or sell within a few years. A three- to five-year term suits those who want to lock in repayments through a full interest-only period or who expect rates to rise and want protection. If you are buying in Miami with the intention of holding the property for a decade and gradually building a portfolio, fixing the entire loan for five years may limit your flexibility when you want to draw equity for your next purchase. A split structure, where you fix half and leave half variable, gives you both certainty and the option to pay down principal or refinance part of the loan without penalty. That structure also means you can take advantage of rate cuts on the variable portion while maintaining stable repayments on the fixed portion.
When you are weighing rate certainty against flexibility, it helps to talk through your timeline and strategy with someone who works with investors regularly. Call one of our team or book an appointment at a time that works for you.
Frequently Asked Questions
Can I still negatively gear an investment property if I fix the rate?
Yes, but the deduction rules depend on when you purchased the property. Properties bought before 7:30pm on 12 May 2026 remain negatively geared under existing rules. Properties bought after that date have rental losses quarantined from 1 July 2027, unless the property is a qualifying new build.
What is a break cost on a fixed rate investment loan?
A break cost is a fee charged when you repay a fixed loan before the term ends and wholesale funding costs have fallen below your fixed rate. The lender calculates the economic loss using the rate difference and the time remaining on your fixed term.
Can I make extra repayments on a fixed rate investment loan?
Most lenders allow limited extra repayments during a fixed term, typically between $10,000 and $30,000 per year depending on the product. Exceeding that limit may trigger a break cost or be prohibited entirely.
Should I fix the full loan amount or split it between fixed and variable?
Splitting gives you both repayment certainty and flexibility. You can lock in part of your loan to stabilise cash flow while keeping the variable portion available for extra repayments, offset benefits or early exit without penalty.
How do the new capital gains tax rules affect fixed rate investment loans?
From 1 July 2027, gains on properties purchased after 12 May 2026 are taxed using indexation and a minimum 30 per cent rate instead of the 50 per cent discount. Your fixed term should align with your intended hold period so you can exit or refinance without penalty when your strategy changes.
