Common Mistakes Property Investors Make with Loans

Most property investors in Melbourne focus on finding the right property but overlook how their loan structure affects long-term returns.

The loan you choose determines your cash flow, your capacity to expand, and how much wealth you retain after tax. Getting it wrong from the start creates problems that compound over time, particularly when you want to add a second or third property to your portfolio.

Choosing Interest Only Without Understanding the Exit Strategy

Interest only repayments reduce your monthly outgoings and improve cash flow. They do not reduce your loan balance, which means you need a clear plan for either refinancing, selling, or switching to principal and interest before the interest only period ends.

Consider a buyer who purchases an apartment in Richmond at the current median, using an investment property loan with a five-year interest only term. Monthly repayments sit around $2,400 at current variable rates. When the interest only period expires, repayments jump to approximately $3,200 as the loan switches to principal and interest over the remaining term. If rental income has not increased enough to cover that gap, the investor either absorbs the shortfall or refinances to extend the interest only period, which depends on serviceability and lender appetite at that time.

The mistake is not using interest only. The mistake is selecting it without modelling what happens when the term ends, especially if you plan to hold the property long-term or if rental yields in the area are tightening.

Underestimating How Lenders Assess Rental Income

Lenders do not use your full rental income when calculating serviceability. Most apply a discount of 20% to account for vacancy, maintenance, and periods without a tenant. If your property generates $2,500 per month in rent, the lender uses $2,000 in their assessment.

This reduction affects how much you can borrow on your next purchase. If you are relying on rental income to service your existing debt while applying for a second loan, that 20% haircut reduces your borrowing capacity substantially. Lenders also factor in body corporate fees, property management costs, and landlord insurance when assessing your position.

In suburbs like Malvern East and Camberwell, where body corporate fees on apartments can exceed $1,200 per quarter, these costs further erode the income lenders attribute to the property. Investors who do not account for this when structuring their first loan often find themselves unable to expand their portfolio without increasing their household income or paying down existing debt.

Fixing the Entire Loan Amount Without Reviewing Rate Discounts

Fixed rates provide certainty, but fixing your entire loan amount removes flexibility and often attracts a higher rate than a variable product. If you fix at a rate that sits above the variable rate at the time, you are paying more from day one for the security of knowing your repayments will not rise.

Some investors split their loan, fixing a portion and leaving the rest on a variable rate. This approach provides partial protection against rate increases while maintaining access to features like offset accounts and additional repayments on the variable portion. The split also allows you to refinance part of the loan if a lower rate becomes available, without triggering break costs on the entire balance.

A scenario worth considering: an investor with a loan amount of $650,000 fixes $400,000 at a rate 0.3% higher than the current variable rate, while keeping $250,000 variable with a full offset account. The fixed portion provides stability for cash flow planning, while the variable portion allows the investor to park surplus income in the offset and reduce interest without penalty. If rates fall or a lower rate becomes available, only the variable portion needs refinancing.

The mistake is not fixing. The mistake is fixing the full amount without considering how that decision affects your ability to adapt as your financial position or market conditions change. Speak to a broker before locking in, particularly if you expect your income or expenses to shift in the next few years.

Selecting a Lender Based Only on the Interest Rate

The lowest rate does not always deliver the lowest cost or the most useful loan structure. Some lenders offer discounted rates but restrict features like additional repayments, offset accounts, or the ability to use equity for future purchases.

If you plan to expand your property portfolio, you need a loan that allows you to access equity without refinancing the entire balance. Some lenders will not lend against equity in an investment property if the loan to value ratio exceeds 80%, even if you have significant equity available. Others limit how much you can borrow for subsequent purchases based on their internal policy for portfolio investors.

Rate discounts also vary depending on the loan amount and loan to value ratio. A lender offering a 0.8% discount at 80% LVR might reduce that to 0.5% at 85% LVR, or remove it entirely if Lenders Mortgage Insurance applies. Investors who focus only on the advertised rate without understanding how that rate applies to their specific scenario often end up with a product that costs more once LMI, application fees, and ongoing account fees are included.

When comparing investment loan options, ask how the lender assesses rental income, whether they allow equity release for future purchases, and what happens to your rate if you increase your loan balance or add another property. These factors matter more than the initial rate when you are focused on building wealth over the long term.

Overlooking Claimable Expenses and How Loan Structure Affects Tax

Loan interest on an investment property is tax deductible. Other borrowing costs, including LMI, application fees, and valuation fees, can also be claimed either upfront or amortised over five years. Investors who do not structure their loan to maximise these deductions leave money on the table every financial year.

If you refinance and use some of the loan balance for personal purposes, the portion used for personal expenses is no longer deductible. Keeping investment and personal borrowing in separate accounts, or at least clearly split, ensures you can substantiate your deductions if the ATO requests records.

Investors in Melbourne also need to account for stamp duty when purchasing in Victoria. Stamp duty on investment properties is higher than on owner-occupied properties, and it is not deductible. However, other ongoing costs such as council rates, insurance, repairs, and property management fees are fully deductible and should be tracked carefully to maximise your tax position.

Work with your accountant to confirm how your loan structure interacts with your overall tax strategy. The way you structure debt affects not just your cash flow, but also your ability to claim deductions and reduce taxable income, which directly impacts how much wealth you retain each year.

Ignoring Serviceability Before Applying for a Second Loan

Your ability to borrow for a second investment property depends on how lenders assess your existing commitments, not just your equity position. Even if you have $200,000 in available equity, you cannot access it unless you can service the additional debt based on lender criteria.

Lenders calculate serviceability using a higher assessment rate than your actual rate, typically adding a buffer of 2.5% to 3%. They also include all existing debt, credit card limits, personal loans, and the discounted rental income from your current investment property. If your cash flow is tight after accounting for these factors, lenders will reduce the amount they are willing to lend, even if your equity supports a larger loan.

Investors who want to build a portfolio should review their serviceability position before purchasing their first property. Structuring your initial loan with lower repayments, using interest only where appropriate, and reducing non-essential debt all improve your capacity to borrow again within a shorter timeframe. Waiting until after you have purchased to consider this often means delaying your next purchase by several years while you pay down debt or increase income.

Use a borrowing capacity calculator to model how your current debts and income affect your ability to expand. If the numbers do not support a second purchase within your desired timeframe, adjust your strategy before committing to your first loan.

Failing to Review and Refinance as Your Portfolio Grows

Your loan structure should evolve as your portfolio grows and your financial position changes. A loan that worked when you purchased your first property may no longer suit your needs once you add a second or third property, or once your income increases and your priorities shift toward paying down debt.

Investment loan refinance allows you to consolidate debt, access equity, or switch to a lender with lower rates or more suitable loan features. Investors who do not review their loans regularly often pay higher rates than necessary or miss opportunities to release equity for further purchases.

Set a review date every two to three years, or sooner if your financial position changes significantly. Refinancing is not just about reducing your rate. It is about ensuring your loan structure continues to support your investment strategy and does not limit your ability to grow wealth through property.

Call one of our team or book an appointment at a time that works for you. We work with property investors across Melbourne to structure loans that support portfolio growth, improve cash flow, and align with your long-term wealth strategy.

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