Rental yield tells you how much income a property generates relative to what you paid for it.
It sounds straightforward, but investors in Stirling often discover that a property with acceptable gross yield can still leave them short when lenders assess serviceability or when tax rules change how much of that income they can keep. Before you settle on a property or apply for finance, you need to understand how yield interacts with borrowing capacity, interest-only structures, and the revised tax treatment that takes effect in mid-2027.
How lenders assess rental income on an investment loan
Most lenders apply a shading factor to declared rent, typically between 75 and 80 per cent, to account for vacancy periods and maintenance costs. The remainder is added to your income when calculating serviceability. If your selected property sits in a precinct with a high vacancy rate, some lenders impose a heavier discount, which reduces the income they recognise and can shrink the loan amount you qualify for.
Consider an investor looking at a two-bedroom unit near Stirling station. Advertised rent is $480 per week. At a 20 per cent shading, the lender counts $384 per week toward serviceability. If the local vacancy rate is higher than the metropolitan average, one lender may shade at 25 per cent while another holds to 20 per cent. That five-percentage-point difference translates to roughly $2,500 less annual income recognised, which in turn affects how much you can borrow across the portfolio.
The borrowing calculation also includes the three-percentage-point serviceability buffer and, since February, the debt-to-income cap on new investment loans. If you are already close to a DTI of six, the rental income shading becomes even more important because every dollar of recognised income determines whether the lender can approve the application under current prudential settings.
Interest-only structures and cashflow in the first five years
Interest-only repayments are common on investor loans because they keep monthly outgoings lower and preserve cashflow for further purchases or to cover shortfalls when rent does not meet all holding costs.
An interest-only period typically lasts five years, after which the loan reverts to principal and interest unless you renegotiate. During that five-year window, your repayment is calculated on the outstanding balance at the interest rate in force. If you hold a variable rate and the Reserve Bank increases the cash rate, your monthly cost rises immediately. If you selected a fixed rate, your repayment is locked for the fixed term but you lose offset-account benefits and often pay higher break costs if you refinance early.
In Stirling, where many investors target units close to public transport, rental income may cover interest during the first few years but rarely covers body corporate fees, insurance, council rates and property management as well. That gap is the negative gearing component, and under current rules you can offset the loss against salary or other income to reduce your tax liability. From July 2027, properties purchased after 12 May 2026 that are not eligible new builds will see those losses quarantined, meaning you can only offset them against other residential rental income or carry them forward.
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What counts as an eligible new build under the revised tax rules
The Treasury Laws Amendment (Tax Reform No. 1) Act 2026 received Royal Assent on 26 June 2026. One of its key measures preserves full negative gearing for properties classified as eligible new residential dwellings.
An eligible new build is a dwelling constructed on previously vacant land or a development that increases the total number of dwellings on the site. A knock-down rebuild that replaces one house with one house does not qualify, even if the new dwelling is larger or of higher quality. A substantial renovation also falls outside the definition. If a new build is occupied for more than twelve months before a subsequent investor purchases it, that subsequent purchaser loses access to unrestricted negative gearing.
For Stirling investors, this distinction matters because the suburb has limited greenfield sites. Most new stock comes from townhouse or unit developments on subdivided blocks. If the development adds two or more dwellings where one stood before, each new dwelling qualifies. If you are considering a property marketed as "brand new" but it was completed eighteen months ago and tenanted since then, confirm the occupancy history before assuming you retain full negative gearing.
Eligible new builds also receive an election on capital gains tax: you can choose between the fifty-per-cent discount and cost-base indexation with a thirty-per-cent minimum rate. Properties that do not meet the new-build test lose the fifty-per-cent discount for gains accruing after 1 July 2027 and instead use indexation with the minimum rate.
Gross yield versus net yield and why the difference shapes your loan application
Gross rental yield divides annual rent by the purchase price. Net yield subtracts all non-interest holding costs before dividing by the purchase price. Lenders do not use either figure directly, but net yield gives you a clearer picture of whether the property will require ongoing contributions from other income.
A unit in Stirling advertised at $500 per week produces $26,000 annual rent. If you pay the current area median, gross yield might sit around four per cent. Subtract $3,000 for body corporate levies, $1,800 for council and water rates, $1,200 for landlord insurance, $1,500 for property management fees at six per cent of rent, and $500 for minor repairs. Your net rental income before interest falls to $18,000. At a variable interest rate on an interest-only loan, the annual interest bill on an 80 per cent LVR loan will often exceed that net figure, leaving you with a loss even before claiming depreciation or other deductions.
That loss is manageable when you can offset it against wage income, but after July 2027 a non-eligible property acquired this year will see the loss quarantined. You can still claim the deduction, but only against future rental profit or future capital gain on residential property. That change does not affect your lender's serviceability assessment today, but it does affect your after-tax cashflow once the loan settles, and many investors underestimate how much additional cash they will need to contribute each month once the quarantine takes effect.
Debt-to-income limits and portfolio investors in Stirling
The DTI cap introduced in February applies separately to new investor loans and new owner-occupied loans. Lenders may approve up to twenty per cent of new investor lending at a DTI of six or greater. Once a lender reaches that threshold in a reporting quarter, further applications above six times income are declined or deferred.
If you already hold one investment property and want to purchase a second in Stirling, the lender adds all your investment debt together and compares it to your gross household income. Rental income, after shading, is added to your income side. If your combined salary is $120,000 and recognised rental income adds $20,000, your effective income is $140,000. A total investment debt of $840,000 or more puts you at a DTI of six, which may fall within the twenty-per-cent allowance or may be declined depending on how much high-DTI lending that lender has already written in the quarter.
Investors in Stirling often hold their principal place of residence in the same council area or nearby in Boroondara and add a rental property within walking distance of Stirling village or the station precinct. That proximity makes property management easier but does not change the DTI calculation. If you are approaching the cap, one option is to refinance existing debt to a lender with a higher income assessment or to delay the second purchase until you have paid down existing loans or increased household income.
Vacancy rates and location within Stirling
Stirling sits within the City of Boroondara, which has historically recorded lower vacancy than the Melbourne metropolitan average. Units close to Stirling station, particularly those within a five-minute walk, maintain higher occupancy because of direct access to the Glen Waverley line and proximity to local shops and cafes along Salvado Street and Monteverdi Crescent.
Properties further from the station or on the边缘 of the suburb, closer to the border with Balwyn North or Deepdene, can experience longer vacancy periods, particularly if the unit is in a larger block without car parking or updated fixtures. Lenders review postcode-level vacancy data, and some overlay their own portfolio performance in the area. A postcode vacancy rate above three per cent may trigger a higher shading factor or a reduction in maximum LVR, both of which affect how much you can borrow and whether the investment remains cashflow neutral during the interest-only period.
When selecting a property, compare advertised days-on-market for similar units in the same street or complex. If comparable stock is taking four to six weeks to lease, budget for at least one month of vacancy per year and factor that cost into your net yield calculation before lodging the investment loan application.
Fixed versus variable rates and the impact on rental property cashflow
A variable rate allows you to link an offset account and make extra repayments without penalty, which is valuable if rental income fluctuates or if you want to park other savings against the loan to reduce interest. A fixed rate locks your repayment for a set term, usually one to five years, but most fixed products do not offer full offset and impose break costs if you sell or refinance before the fixed term ends.
For a Stirling investor on an interest-only loan, the choice often comes down to cashflow predictability versus flexibility. If you are salary earners with stable income and you want certainty on monthly outgoings, a two- or three-year fixed rate can make budgeting easier, particularly if you expect rate rises during that period. If you are building a portfolio and may want to access equity or refinance within two years to fund the next purchase, a variable rate avoids break costs and keeps your options open.
Some investors use a split strategy, fixing a portion of the loan and leaving the remainder on a variable rate. That approach offers partial certainty while retaining access to offset and redraw on the variable portion. Lenders assess each split as a separate facility, and the blended rate determines your interest cost, but the structure adds complexity at tax time because you need to apportion interest deductions between the two facilities if you later draw funds for private purposes.
Maximising claimable expenses without overstating deductions
Interest on an investment loan is deductible when the borrowed funds are used to acquire or hold the rental property. If you draw additional funds from the loan for a private purpose, such as a holiday or a car, the interest on that portion is not claimable even though the security is the investment property.
Other claimable expenses include property management fees, landlord insurance, council rates, water charges, body corporate levies, repairs and maintenance, and depreciation on fixtures and the building itself if the property qualifies for capital works deductions. Loan application fees and lender legal costs are deductible over five years or the loan term, whichever is shorter. Stamp duty and conveyancing fees are not deductible but form part of the cost base for capital gains tax.
Investors sometimes prepay twelve months of interest before 30 June to bring forward the deduction. That strategy works when you hold the loan on 30 June and the prepayment covers a period of no more than twelve months, but the cashflow impact is significant and the tax benefit is simply timing, not a permanent saving. If you refinance or sell during the prepayment period, you may need to apportion the deduction across financial years.
From July 2027, the value of these deductions changes for affected properties because the loss can no longer reduce your tax on salary. The deduction still exists and can be carried forward, but you receive no immediate tax refund unless you have other residential rental income in the same year.
When to consider principal-and-interest repayments on an investor loan
Most investors choose interest-only to preserve cashflow, but principal-and-interest repayments build equity faster and reduce the total interest paid over the life of the loan. Once the interest-only period expires, the loan automatically reverts to principal and interest, and the repayment jumps because you are now amortising the full balance over the remaining term.
If you plan to hold the Stirling property long-term as part of a wealth-building strategy, switching to principal and interest after the first five years can make sense, particularly if rental income has increased or if you have paid down other debt and can absorb the higher repayment. Some lenders allow you to revert to interest-only after the initial period by submitting a new application, but approval depends on serviceability at that time and whether the LVR still meets the lender's appetite.
Principal-and-interest repayments also reduce your exposure to interest-rate risk. If variable rates rise, a lower outstanding balance means each rate increase has a smaller dollar impact. For investors holding multiple properties, paying down one loan while keeping others on interest-only can balance portfolio risk without sacrificing cashflow across the board.
If you are weighing the options or your fixed rate is approaching expiry, a loan health check can compare your current structure against what is available now and show you the cashflow difference between interest-only, principal-and-interest, and split arrangements before you commit to a new term.
Call one of our team or book an appointment at a time that works for you to discuss how rental yield, serviceability settings and the revised tax treatment affect your specific borrowing capacity and property selection in Stirling.
Frequently Asked Questions
How do lenders assess rental income when I apply for an investment loan?
Lenders apply a shading factor, typically 75 to 80 per cent of advertised rent, to account for vacancy and maintenance. The shaded amount is added to your income for serviceability calculations, and a higher local vacancy rate can trigger a heavier discount.
What is the difference between gross rental yield and net rental yield?
Gross yield divides annual rent by the purchase price. Net yield subtracts all non-interest holding costs, such as body corporate fees, insurance, council rates and management fees, before dividing by the purchase price. Net yield gives a clearer picture of actual cashflow.
Will I still be able to negatively gear a property I buy in Stirling this year?
Properties purchased after 12 May 2026 that are not eligible new builds will have rental losses quarantined from July 2027, meaning you can only offset them against other residential rental income or carry them forward. Current negative gearing rules apply until 30 June 2027 for properties acquired before then.
What counts as an eligible new build for tax purposes?
An eligible new build is a dwelling constructed on previously vacant land or a development that increases the number of dwellings on a site. Knock-down rebuilds that do not add dwellings and substantial renovations do not qualify. A new build occupied for more than twelve months before sale also loses the concession for the next investor.
Should I choose a fixed or variable rate for an investment loan in Stirling?
A variable rate allows offset accounts and flexibility to refinance without break costs, which suits investors building a portfolio. A fixed rate locks repayments for certainty but limits flexibility and may incur break costs if you sell or refinance early. Some investors use a split to balance both.
