Unlock the secrets to rental yield on investment loans

Rental yield measures the annual rental income a property generates as a percentage of its purchase price or current market value.

That percentage tells you whether the property is likely to generate enough income to cover holding costs or whether you will be subsidising the investment from other income. On the Central Coast, investors often face a choice between higher-yield units in Gosford or The Entrance and lower-yield but capital-growth-focused houses in suburbs like Terrigal or Avoca Beach. The loan structure you choose, including the deposit size, rate type and repayment method, directly affects whether the yield supports the loan or requires top-up from your salary.

From 1 July 2027, new tax rules will quarantine rental losses on most residential properties purchased after 12 May 2026, meaning negative gearing will no longer reduce your taxable income unless the property is an eligible new build. This change makes positive or near-neutral cash flow more important than it has been in the past.

How rental yield is calculated and why it matters

Gross rental yield is annual rent divided by property value, expressed as a percentage. Net rental yield subtracts operating expenses such as body corporate fees, council rates, insurance, property management and maintenance before dividing by the property value.

Consider a two-bedroom unit in Gosford listed at $480,000 and renting for $480 per week. Gross yield is ($480 × 52) ÷ $480,000 = 5.2 per cent. After deducting $8,000 in annual expenses, net yield falls to 4.5 per cent. That same $480,000 budget in a house in a coastal pocket might rent for $600 per week but carry higher holding costs and a lower net yield once vacancy and maintenance are included.

Net yield determines whether rental income covers your loan repayment and holding costs. If it does not, you need sufficient taxable income to service the shortfall, and under the new rules applying from mid-2027, that shortfall will no longer reduce your tax bill unless the property qualifies as a new build.

Interest-only repayments and their effect on cash flow

Interest-only repayments keep the loan balance unchanged and reduce the monthly cost compared with principal and interest.

Many investors structure investment loans on an interest-only term for the first five years to maximise rental income coverage and preserve cash for further deposits or offset accounts. On a $400,000 loan at current variable rates, switching from principal and interest to interest-only can reduce the monthly repayment by around $700. That difference can turn a negatively geared property into one that is close to cash-flow neutral, particularly if the yield is above 5 per cent.

Interest-only terms are not indefinite. Most lenders cap the initial period at five years, after which the loan reverts to principal and interest unless you refinance or negotiate an extension. If rental income has not increased or if rates have risen, the reversion can create a cash-flow shortfall that requires additional income or sale of the property.

Fixed versus variable rates for rental properties

Fixed rates lock in your repayment and make budgeting more predictable, but they also lock in the rate regardless of whether the market falls.

Variable rates allow you to benefit from rate cuts and typically come with offset accounts and redraw facilities, which can be used to park rental income and reduce interest. For properties with tight margins, an offset account can turn a small negative cash flow into a neutral one by applying surplus income against the loan balance each month.

In our experience, investors with multiple properties or those planning to use equity for further purchases prefer variable rates because they offer flexibility to refinance or draw down without break costs. Investors with a single property and limited capacity to service shortfalls sometimes prefer a fixed term to lock in certainty during the first few years.

Lender criteria for investment loans and deposit requirements

Lenders assess investment loan applications using a rental income assumption that is typically 80 per cent of market rent to account for vacancy and collection risk.

If a property rents for $500 per week, the lender will assess serviceability based on $400 per week, even if you have a signed lease at the higher amount. That haircut can affect how much you can borrow, particularly under the debt-to-income caps introduced in February this year. Investors are now limited to a maximum of six times gross income for 80 per cent of new investor loans, which can restrict borrowing even if rental income appears strong.

Most lenders require a minimum 10 per cent deposit for investment purchases, but borrowing above 80 per cent loan-to-value ratio attracts Lenders Mortgage Insurance, which is capitalised into the loan and increases the amount you need to service. A 10 per cent deposit on a $500,000 property means LMI of around $15,000 to $18,000, lifting the total loan to $468,000 and reducing your net yield accordingly.

Tax treatment and the shift from 1 July 2027

Under current rules, a rental loss can be offset against salary or other income, reducing your taxable income and generating a tax refund that helps fund the shortfall.

From 1 July 2027, that offset will no longer be available for residential properties acquired after 12 May 2026 unless the property is an eligible new build. Losses will be quarantined and can only be used against future rental income or capital gains on sale. Properties purchased before that date, or under contract before 7:30pm on 12 May 2026, remain grandfathered and can continue to be negatively geared under the old rules.

For a property generating a $10,000 annual loss, the tax benefit under current rules is around $3,700 for someone on the 37 per cent marginal rate. From mid-2027, that benefit disappears for new purchases unless you buy a qualifying new dwelling. This makes rental yield and cash-flow modelling more important than it has been in the past two decades.

Vacancy rates and holding cost buffers on the Central Coast

Vacancy rates vary by location and property type, and a buffer is required even in high-demand areas.

Across the Central Coast, vacancy rates for units in Gosford and Wyong have historically sat between 2 and 4 per cent, while detached houses in beachside suburbs such as Terrigal or Bateau Bay tend to have lower vacancy but higher tenant turnover during summer. A property vacant for three weeks between tenants reduces annual rental income by around 6 per cent, which can turn a break-even property into one requiring a cash top-up.

When modelling rental yield, allow for at least four weeks of vacancy per year, plus one month of holding costs as a buffer for unexpected repairs or periods between leases. If the numbers only work at 100 per cent occupancy and zero maintenance, the investment does not have enough margin to withstand normal operating conditions.

Using equity to fund deposits and the impact on yield

Many investors use equity in their home to fund the deposit on an investment property rather than saving cash.

Releasing equity increases the debt against your home and may require you to pay LMI on both properties if the combined loan-to-value ratio exceeds 80 per cent. It also means the rental yield needs to support not only the investment loan but also the additional interest cost on the increased home loan balance. In a scenario where you release $100,000 in equity to fund a deposit, the additional interest on your home loan is around $6,000 per year at current rates, which must be factored into the net return on the investment.

If you are considering using equity, model the combined repayment and ensure the rental income, after expenses, covers at least the interest-only cost on the investment loan. Anything less requires ongoing subsidy from salary, which may not be sustainable if your income changes or if the quarantining rules apply from mid-2027.

When refinancing improves yield without changing the property

Refinancing an existing investment loan to a lower rate or better structure can lift your net yield without selling or renovating.

A rate reduction of 0.5 per cent on a $400,000 loan reduces annual interest by $2,000, which on a property valued at $500,000 adds 0.4 percentage points to your net yield. Over ten properties, that same refinance can improve annual cash flow by $20,000, which is the difference between needing to inject cash each year and running a self-funding portfolio.

Lenders regularly offer rate discounts to new customers that are not available to existing borrowers, and product features such as offset accounts or fee waivers can further improve the return. A loan health check every two years ensures you are not paying more than you need to and that the loan structure still aligns with your income and portfolio goals.

Understanding rental yield means looking beyond the advertised rent and modelling the actual income after vacancy, expenses, loan costs and tax treatment. The tax changes coming into effect from mid-2027 make cash flow more important than it has been for a generation, and the loan structure you choose now will determine whether the property supports itself or requires ongoing subsidy. Call one of our team or book an appointment at a time that works for you to model your scenario and make sure the numbers add up before you commit.

Frequently Asked Questions