The Pros and Cons of Fixed Rate Investment Loans

Fixed rate features on investment loans offer predictable repayments for a set period, but they also introduce constraints that variable rate products avoid.

The question for property investors in Kew is whether the certainty of a fixed rate justifies the limitations, particularly when your investment strategy might need to respond to market changes, portfolio growth opportunities, or the recent shifts in tax treatment for residential property acquired after May 2026. The answer depends on your borrowing structure, your holding timeframe, and whether you intend to access equity or make principal repayments during the fixed period.

Rate Certainty During the Fixed Period

A fixed rate investment loan locks your interest rate for a chosen term, typically between one and five years. Your repayments remain unchanged during that period regardless of Reserve Bank movements or lender rate adjustments.

This certainty is useful when interest rates are rising or volatile, particularly for investors relying on rental income to cover most of the loan repayment. If your property generates $800 per week in rent and your repayment sits at $850 per week on a fixed rate, you know exactly what the shortfall will be each month. That predictability makes budgeting more reliable, especially if you hold multiple properties or are managing cash flow across other investments.

The limitation is that you remain locked in even if rates fall. If variable rates drop by 0.50% during your fixed term, you continue paying the higher fixed rate until expiry. There is no mechanism to exit early without incurring break costs, which can be substantial depending on how far rates have moved and how much time remains on the fixed term.

Interest Only Availability on Fixed Terms

Most lenders offer interest only repayments on fixed rate investment loans, though the maximum interest only period on a fixed term is usually capped at five years.

Interest only repayments keep your monthly outgoings lower, which can improve cash flow if you are holding the property for capital growth rather than paying down the loan. For an investor in Kew holding a period property near High Street with strong long term growth prospects, an interest only fixed rate might deliver predictable repayments while preserving cash for other purposes.

The trade off is that interest only periods on fixed terms do not always align with your broader investment timeline. If your fixed term is three years but you want interest only for five, you will need to reapply at the end of the fixed period, and the lender may reassess your income, expenses, and the property's rental yield before approving an extension. If rental vacancy rates have increased or your income has changed, the lender may require you to switch to principal and interest repayments, which increases your monthly cost.

Prepayment Restrictions and Break Costs

Fixed rate investment loans typically restrict how much extra you can repay during the fixed term without penalty. Most lenders allow between $10,000 and $30,000 in additional repayments per year, though some products permit no extra repayments at all.

This becomes a problem if your investment strategy involves paying down debt when cash flow improves, or if you want to reduce the loan balance before refinancing or selling. If you receive a bonus, an inheritance, or proceeds from another sale and want to reduce your investment loan, you will either need to stay within the prepayment cap or pay break costs to exit the fixed term early.

Break costs are calculated based on the difference between your fixed rate and the lender's current wholesale funding cost for the remaining term. If you fixed at 5.5% and wholesale rates have dropped to 4.8%, the lender will charge you the economic loss they incur by releasing you early. On a loan of $600,000 with two years remaining, break costs can exceed $15,000. That cost is not negotiable and must be paid in full if you want to refinance, sell, or switch to a variable rate before the fixed term ends.

Access to Offset Accounts and Redraw Facilities

Most fixed rate investment loans do not offer offset accounts, and any redraw facility is usually limited by the annual prepayment cap.

This removes one of the more useful cash flow tools available on variable rate products. An offset account allows you to park surplus funds in a transaction account linked to your loan, reducing the interest charged without locking those funds into the loan itself. For investors managing rental income, sale proceeds, or cash reserves across multiple properties, an offset account provides flexibility that a fixed rate product cannot match.

If you make additional repayments within the allowed cap and later want to redraw those funds, some lenders will permit it, but others treat the redraw as a new loan advance and require a fresh application. That delay can be inconvenient if you need access to funds quickly, and it introduces uncertainty that does not exist with an offset or a variable loan with unrestricted redraw.

Portfolio Flexibility and Equity Access

Investors in Kew often hold properties with substantial equity, particularly if they purchased in the area prior to recent price growth. Accessing that equity to fund another purchase, complete renovations, or consolidate debt usually requires a refinance or a top up of the existing loan.

If your investment loan is fixed, accessing equity during the fixed term will trigger break costs unless the lender allows a partial release or a split loan structure. Some lenders permit you to keep the fixed portion unchanged and draw additional funds on a separate variable split, but this is not universally available and often requires the variable split to meet minimum loan size requirements.

Consider an investor holding a two bedroom apartment near Kew Junction with a loan of $500,000 on a three year fixed rate. If the property is now worth $750,000 and the investor wants to access $100,000 in equity to fund a deposit on a second property, they would need to either pay break costs to exit the fixed term, or apply for a separate loan secured against the same property. The second option introduces additional complexity and may result in higher interest rates on the equity portion, which reduces the overall benefit.

Rate Discount Retention on Fixed Terms

Fixed rate investment loans often carry smaller rate discounts than variable products, particularly if the fixed term is longer than two years. Lenders price fixed rates based on their wholesale funding costs and their view of future rate movements, which means the advertised fixed rate may be higher than the equivalent variable rate at the time you lock in.

In some cases, investors assume they are securing a lower rate by fixing, only to find that the fixed rate offered is 0.20% to 0.40% higher than the discounted variable rate available on the same product. Over a three year term on a $600,000 loan, that difference can add $7,000 to $14,000 in additional interest, which offsets much of the benefit of rate certainty.

The other consideration is that fixed rates do not benefit from ongoing rate discounts or loyalty offers that lenders sometimes extend to variable rate customers. If your lender reduces variable rates or offers retention discounts to prevent customers switching, your fixed rate remains unchanged. You will only benefit from improved pricing when the fixed term ends and you revert to the variable rate or negotiate a new fixed term.

Fixed Rate Expiry and Reversion Rates

When your fixed term ends, your loan automatically reverts to the lender's standard variable rate unless you proactively negotiate a new rate or refinance. The standard variable rate is typically 0.50% to 1.00% higher than the discounted variable rate offered to new customers, which can significantly increase your repayments.

If you are holding multiple properties or managing cash flow on thin margins, a sudden increase in repayments at fixed rate expiry can create pressure. Lenders usually contact you 30 to 60 days before expiry, but the onus is on you to negotiate or switch. If you miss that window, you may end up paying a higher rate for several months before securing a better deal.

This is particularly relevant for investors who fixed their rate during a period of rising rates and are now approaching expiry in a lower rate environment. If you fixed at 6.0% three years ago and the current discounted variable rate is 5.2%, you will want to act before expiry to avoid reverting to a standard variable rate of 6.5% or higher. That might mean refinancing to a new lender, renegotiating with your current lender, or fixing again for a further term.

Split Loan Structures and Fixed Rate Allocation

A split loan allows you to fix a portion of your investment loan while keeping the remainder on a variable rate. This approach provides some rate certainty while maintaining access to features like offset accounts, unrestricted extra repayments, and redraw on the variable portion.

For investors in Kew holding properties with strong rental yields, a split structure can provide a middle ground. You might fix 60% of the loan to protect against rate increases, while keeping 40% variable to allow prepayments, equity access, and flexibility as your portfolio grows.

The challenge with split loans is that each portion is treated as a separate loan facility, which means you need to manage two sets of terms, two rate expiry dates, and two reversion strategies. If the fixed portion expires and you want to fix again, you will need to renegotiate or refinance that split independently. If you want to access equity, you may need to restructure both splits, which can introduce additional costs and complexity.

Tax Deductibility and Loan Structure Considerations

Interest on an investment loan remains tax deductible regardless of whether the rate is fixed or variable, but the ability to adjust your loan structure during the fixed term is limited.

If you plan to convert your investment property to an owner occupied property, or if you want to consolidate debt or adjust your loan to value ratio before the end of the financial year, a fixed rate loan may prevent you from making those changes without incurring break costs. For investors who purchased an established residential property after 12 May 2026, the tax treatment of negative gearing and capital gains will differ from properties purchased before that date, which makes loan flexibility more important. You may need to adjust your borrowing structure to respond to those changes, and a fixed rate restricts your ability to do so during the fixed term.

This does not mean fixed rates are unsuitable for investors affected by the recent tax changes, but it does mean you need to consider your likely holding period and whether you might need to refinance, restructure, or sell before the fixed term ends.

If you are considering a fixed rate investment loan in Kew, or if you are approaching the end of a fixed term and need to review your options, call one of our team or book an appointment at a time that works for you. We can assess your current loan structure, compare fixed and variable features across lenders, and help you determine whether a fixed rate, variable rate, or split loan aligns with your investment strategy and cash flow needs.

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