Avoid These 5 Mistakes Buying Rental Property

Buying a rental property looks straightforward until you start working through the lending part.

The structure you choose for your investment loan affects how much you can borrow, what you pay each month, and how your tax position shapes up from July next year when the new negative gearing rules take effect. Getting the loan side wrong can cost you thousands in unnecessary interest or lock you into a product that doesn't fit how you plan to grow your portfolio.

Borrowing More Than the Rental Income Supports

Lenders assess investment loans differently to owner-occupied finance. They calculate serviceability using the rental income the property generates, minus a vacancy allowance, and add that figure to your other income before applying the 3 percentage point buffer.

Consider a buyer in North Lambton looking at a unit near Hickson Street that rents for $480 per week. The lender applies a 20 per cent vacancy rate, reducing usable rental income to $384 per week or roughly $19,968 per year. If the loan amount pushes repayments above what your salary plus that adjusted rental income can service at the buffered rate, the application will either be declined or you will need to drop the loan amount. We see this regularly with buyers who assume the advertised rent will be counted in full, then find they need a larger deposit or a lower purchase price to make the numbers work.

Choosing Interest-Only Without a Clear Reason

Interest-only periods let you hold repayments lower in the early years, which can suit investors planning to sell within a set timeframe or those using surplus cash flow to fund other deposits.

The trade-off is that you pay more interest over the life of the loan because the principal does not reduce during the interest-only term. Once the interest-only period ends, repayments jump as the loan switches to principal and interest and the remaining term compresses. If your plan is to hold the property long-term and build equity, starting on principal and interest from day one usually delivers better financial outcomes. If you are planning to leverage equity from this property into another purchase within a few years, interest-only can free up cash flow now without forcing early sale. The key is knowing which strategy fits your timeline before you lock in a loan structure.

Overlooking the Debt-to-Income Cap on Investor Lending

Since February, lenders can only write 20 per cent of new investor loans at a debt-to-income ratio of six times or higher. If your total debt sits above six times your gross household income, you will need to approach lenders who have not yet used their quota or wait for the next reporting period.

In practice, this means a household earning $120,000 per year can borrow up to $720,000 before hitting the cap. If you already have $300,000 in debt from an owner-occupied loan or car finance, your available investment borrowing drops to $420,000 before the DTI cap applies. Some lenders tighten their own policies well before they reach APRA's 20 per cent limit, so the cap can bite earlier than you expect. Checking your DTI position before you start looking at properties avoids wasted time on offers you cannot fund.

Ignoring How Tax Rules Change in July Next Year

Properties purchased after 12 May last year will no longer allow you to offset rental losses against your wage income from 1 July next year. Losses will be quarantined and can only be used against future rental income or capital gains on residential property.

This affects cash flow in the first few years when interest costs and other claimable expenses typically exceed rental income. If you were counting on a negative gearing tax refund to cover part of your holding costs, that refund will not arrive under the new rules. You will need to fund the shortfall from your own cash flow. New builds on previously vacant land or projects that increase dwelling numbers are carved out of this change, meaning they remain eligible for negative gearing under the old rules. If cash flow is tight and you were planning to use tax refunds to subsidise the investment, a qualifying new build may be the more sustainable option.

Locking in a Fixed Rate When You Plan to Access Equity Soon

Fixed rates offer repayment certainty, but they come with restrictions. Most fixed rate products limit additional repayments to $10,000 or $20,000 per year, and if you refinance or sell during the fixed period, break costs can run into the thousands.

If your strategy involves pulling equity from the investment property to fund a second purchase within the next two or three years, a variable rate loan with an offset account and no restrictions on additional repayments gives you the flexibility to act when the next opportunity appears. Variable rates also let you refinance without penalty if a better rate or product becomes available. The risk is that rates can move higher, but for active investors planning to adjust their structure as the portfolio grows, paying slightly more for flexibility often makes more sense than locking in a rate that limits your options.

North Lambton sits close to Jesmond and New Lambton, where owner-occupier demand keeps vacancy low and rental supply fairly stable. Buyers looking in this area often choose established units or older homes on reasonable block sizes, both of which fall under the new negative gearing rules if purchased now. If your focus is on an established property rather than a new build, run the numbers assuming no tax offset from rental losses and make sure the holding costs still work on your current income.

Getting your loan structure right from the start means fewer surprises once settlement happens and the holding costs become real. If you are weighing up loan products or trying to figure out whether your borrowing capacity fits the property you have in mind, call one of our team or book an appointment at a time that works for you.

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