Rental Yield is Determined Before You Choose a Loan Product
Rental yield is the annual rental income expressed as a percentage of the property's purchase price or current value. A property that generates $25,000 in rent each year and cost $500,000 to purchase delivers a gross rental yield of 5 per cent. The net yield, which accounts for holding costs such as council rates, insurance, property management and interest, is usually lower and varies depending on how the investment loan is structured.
Yield calculations begin with property selection, not loan selection. Brunswick offers a mix of rental markets. Older one and two-bedroom units close to Sydney Road typically generate higher gross yields than renovated Victorian-era homes in the heritage pockets near Jewell Station, where capital growth expectations and lower vacancy rates tend to dominate investor decisions. A two-bedroom apartment near the northern end of Sydney Road might rent for $450 to $500 per week, while a three-bedroom period home closer to the southern boundary could rent for $650 to $700 per week but carry a significantly higher purchase price.
Consider an investor purchasing a two-bedroom unit within walking distance of Brunswick Station. Rental income sits at $480 per week, or approximately $24,960 per year. Body corporate fees, council rates and insurance total around $6,500 annually. Property management at 7 per cent of rent costs roughly $1,750. Before interest, the property generates $16,710 in net income. The structure of the investment loan directly affects how much of that income is retained.
Interest-Only Loans Improve Short-Term Cash Flow
An interest-only investment loan reduces the periodic repayment by deferring principal repayments for an agreed term, usually between one and five years. The borrower pays only the interest charged on the outstanding loan amount. When the interest-only period ends, the loan typically reverts to principal and interest repayments unless renegotiated.
Interest-only structures suit investors prioritising cash flow over debt reduction. The lower repayment improves the property's net rental yield and reduces reliance on other income sources to cover holding costs. It also preserves borrowing capacity, which can assist with equity release strategies or future portfolio expansion. Under the current prudential framework, an investment loan with an interest-only period exceeding five years and a loan-to-value ratio above 80 per cent is classified as non-standard and attracts higher capital charges for the lender, which usually flows through to the interest rate offered.
In the Brunswick example above, an interest-only loan at current variable rates on an 80 per cent LVR would result in annual interest costs of approximately $20,000 to $22,000, depending on the lender and rate discount negotiated. The net rental income after interest would be negative, between $3,000 and $5,000 per year, before depreciation or other claimable expenses. While the property is negatively geared, the interest-only structure keeps the annual cash shortfall lower than it would be under principal and interest repayments, where the total repayment might be $28,000 to $30,000 annually.
How Loan-to-Value Ratio Affects Investor Interest Rates
The loan-to-value ratio is the amount borrowed expressed as a percentage of the property's value. A borrower seeking $400,000 to purchase a property valued at $500,000 has an LVR of 80 per cent. LVR directly influences the interest rate, the requirement for lenders mortgage insurance, and the risk weighting applied by the lender under Prudential Standard APS 112.
Investment loans generally attract higher interest rates than owner-occupied loans at the same LVR. Lenders apply an additional margin, typically between 0.20 and 0.50 percentage points, to reflect the higher risk profile of investment lending. LVRs above 80 per cent require lenders mortgage insurance, which is charged to the borrower and calculated on a sliding scale. For an investor borrowing at 90 per cent LVR, LMI can add several thousand dollars to the upfront cost. A larger deposit not only removes the LMI premium but also unlocks lower interest rates, improving net yield.
In the scenario outlined earlier, reducing the LVR from 80 per cent to 70 per cent by increasing the initial deposit might reduce the interest rate by 0.15 to 0.25 percentage points. Over a full year, that rate reduction could save $600 to $1,000 in interest, which flows directly to the bottom line and improves the property's net yield. Investors refinancing an existing investment loan can achieve a similar outcome by leveraging equity from capital growth or other properties to reduce the LVR on the subject property.
Fixed or Variable Rates for Investment Property Finance
Investment loan products are available with variable rates, fixed rates, or a split between the two. Variable rates move with the lender's pricing decisions and offer flexibility to make additional repayments or redraw funds without penalty. Fixed rates lock in the interest rate for a set term, usually between one and five years, and typically restrict additional repayments and limit access to offset accounts.
A fixed rate provides certainty over repayment amounts during the fixed period, which assists with budgeting and protects against rate rises. A variable rate allows the investor to respond to changing financial circumstances, take advantage of rate reductions, and preserve flexibility around portfolio changes. Split rate structures combine both approaches, allocating a portion of the loan to a fixed rate and the remainder to a variable rate.
Offset accounts, which are usually only available on variable rate portions, reduce the interest charged on the loan by offsetting the balance in the linked transaction account against the outstanding loan amount. For an investment loan, interest saved through an offset is equivalent to additional rental income and improves net yield. Offset accounts also preserve liquidity, which is useful if the property experiences a vacancy period or requires unplanned maintenance.
Vacancy Periods and Borrowing Capacity Under Serviceability Rules
Lenders assess investment loan applications by calculating the borrower's ability to service the proposed debt at an interest rate at least 3 percentage points above the loan product rate. This buffer, set by the Australian Prudential Regulation Authority, applies to all new loans from authorised deposit-taking institutions. Rental income from the investment property is included in the serviceability assessment, but most lenders apply a haircut, typically between 20 and 30 per cent, to account for vacancy periods, maintenance costs and property management fees.
A property generating $24,960 in annual rent might only contribute $17,500 to $20,000 toward serviceability after the lender applies the haircut. If the property has a history of extended vacancies or is located in an area with a high vacancy rate, some lenders apply a larger reduction or exclude rental income altogether. Brunswick generally experiences low vacancy rates due to proximity to the CBD, public transport access along the Upfield and Moreland lines, and demand from renters attracted to the suburb's retail and hospitality precincts. Lenders are more likely to apply the standard haircut rather than a punitive adjustment.
Debt-to-income lending limits, which came into effect in February 2026, cap the proportion of new lending that can be made to borrowers with total debt exceeding six times their gross income. The limit applies separately to owner-occupier and investor lending. An investor with gross income of $100,000 can borrow up to $600,000 without triggering the DTI threshold, though lenders retain discretion to lend above that level within the 20 per cent portfolio allowance. Investors with existing debt or multiple properties may find their borrowing capacity constrained by the DTI limit even if they meet the serviceability buffer.
Depreciation and Claimable Expenses Improve Net Yield
Net rental yield accounts for all holding costs, including non-cash deductions such as depreciation. Depreciation schedules, prepared by a quantity surveyor, identify capital works deductions and plant and equipment deductions available over the life of the asset. Newer properties and properties with recent renovations typically offer higher depreciation claims, which reduce taxable income and improve the investor's after-tax return.
Other claimable expenses include interest on the investment loan, property management fees, council rates, insurance, repairs and maintenance, and body corporate fees. Interest is fully deductible for loans used to acquire or hold residential rental property, provided the property is rented or genuinely available for rent. From the 2027-28 income year, losses on established residential investment properties acquired after 12 May 2026 can only be offset against other residential property income, including capital gains. Properties held before that date, or under contract at that time, retain full negative gearing treatment until sold. Eligible new builds acquired after 12 May 2026 also retain full negative gearing.
An investor purchasing an established property in Brunswick after 12 May 2026 who is negatively geared by $4,000 per year will not be able to deduct that loss against salary or business income from the 2027-28 income year onward. The loss can be carried forward and offset against future residential property income or capital gains. This change increases the importance of targeting properties with strong gross yields or lower holding costs to minimise the annual loss that must be quarantined.
Choosing Investment Loan Features That Align With Portfolio Strategy
Investment loan features should be selected based on the investor's broader portfolio strategy, not on the features themselves. An investor planning to acquire multiple properties over the next few years benefits from preserving borrowing capacity by minimising principal repayments and maintaining offset account balances. An investor approaching retirement or seeking to reduce debt may prefer principal and interest repayments and shorter loan terms, even if the repayments reduce short-term cash flow.
Flexibility around additional repayments, redraw facilities and portability varies across lenders and loan products. Some investment loan products allow unlimited additional repayments on the variable portion without penalty, while others cap additional repayments or charge fees for redraw. Portability allows the loan to be transferred to a different property without refinancing, which can reduce costs if the investor sells the original property and purchases a replacement within a short timeframe. Not all lenders offer portability, and where it is offered, conditions usually apply.
Rate discounts on investment loans are negotiable and depend on the loan amount, LVR, and the borrower's overall relationship with the lender. An investor refinancing an investment loan or consolidating multiple loans with a single lender may be able to negotiate a larger discount than a borrower applying for a single small loan at high LVR. Mortgage brokers typically have access to a wider range of investment loan options and can compare rate discounts, fees and features across multiple lenders to identify the product that delivers the lowest overall cost.
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Frequently Asked Questions
How does an interest-only investment loan improve rental yield?
An interest-only loan reduces the periodic repayment by deferring principal repayments, usually for one to five years. Lower repayments improve net cash flow from the rental property, which increases the net rental yield and reduces reliance on other income to cover holding costs.
What loan-to-value ratio should I target for an investment property?
An LVR of 80 per cent or below avoids lenders mortgage insurance and typically qualifies for lower interest rates. Reducing the LVR further, to 70 per cent for example, can unlock additional rate discounts and improve the property's net yield by lowering annual interest costs.
Can I still negatively gear an investment property purchased in Brunswick?
Properties held or under contract at 7:30pm AEST on 12 May 2026, and eligible new builds acquired after that date, retain full negative gearing. Established properties purchased after 12 May 2026 can only offset losses against residential property income from the 2027-28 income year onward.
How do lenders assess rental income when calculating borrowing capacity?
Lenders apply a haircut, typically 20 to 30 per cent, to rental income to account for vacancies and holding costs. A property generating $24,960 in annual rent might contribute only $17,500 to $20,000 toward serviceability after the haircut is applied.
Do offset accounts work the same way for investment loans as owner-occupied loans?
Yes, an offset account reduces the interest charged on the loan by offsetting the linked transaction account balance against the outstanding loan amount. For investment loans, interest saved through an offset is equivalent to additional rental income and improves net yield.
