Top Strategies to Use Home Equity for Investment Property

Equity in your home can work as a deposit for an investment property without requiring you to save a separate cash sum.

The principle is straightforward. Your lender values your existing property, calculates the difference between that value and what you still owe, then allows you to borrow against a portion of that difference to fund a deposit and costs on a second property. The structure keeps both loans separate but linked through security, which affects how lenders assess serviceability and risk.

How Lenders Calculate Usable Equity

Lenders will typically lend up to 80 per cent of your property value without requiring Lenders Mortgage Insurance. If your home is valued at $900,000 and you owe $400,000, your equity position is $500,000. At 80 per cent LVR, the lender would allow total borrowing of $720,000 against that property, leaving $320,000 in usable equity once the existing debt is accounted for.

That $320,000 can fund the deposit and acquisition costs on an investment purchase. If you need a 20 per cent deposit on a $700,000 property plus $30,000 for stamp duty and other costs, you would draw $170,000 from the equity and structure the investment loan for the remaining $530,000. Both loans remain secured against your home until the investment property settles, at which point the investment loan is typically moved to the new property as security.

In our experience, buyers on the Mornington Peninsula often hold significant equity in their primary residence due to sustained price growth across suburbs like Mount Eliza, Mornington and Safety Beach. Releasing that equity can be more efficient than liquidating other investments or waiting to accumulate cash savings, particularly where rental income offsets some or all of the interest cost on the investment loan.

Serviceability Under Current Prudential Settings

Your ability to service both loans is assessed using a buffer of 3 percentage points above the actual interest rate. If the lender's current variable rate for investors is 6.5 per cent, serviceability is tested at 9.5 per cent. Your existing mortgage is also reassessed at the higher test rate, which means the combined repayment capacity needs to cover both loans at the buffered rate plus all other debts and living expenses.

From 1 February 2026, lenders also apply a debt-to-income cap. Up to 20 per cent of new investor lending can be written at a DTI of 6 times gross income or higher, but most lenders aim to stay within that cap to avoid portfolio concentration. If your household income is $180,000, a combined debt position above $1,080,000 may require additional justification or a larger deposit to reduce the loan amount.

Consider a couple earning $180,000 jointly who own a home in Dromana valued at $850,000 with $350,000 owing. They want to purchase a $650,000 unit in Rosebud as an investment. Usable equity at 80 per cent LVR is $330,000, sufficient to cover a $130,000 deposit and $25,000 in stamp duty and costs. The investment loan would be $520,000. Their total debt becomes $870,000, within the DTI cap, and the rental income from the unit contributes to serviceability. The structure works because both the equity release and the investment loan are assessed together, and the numbers support the application without requiring Lenders Mortgage Insurance.

Interest Only Versus Principal and Interest on Investment Loans

Interest-only repayments are commonly used on investment loans because they reduce monthly outgoings and allow investors to claim the full interest amount as a deduction against rental income. An interest-only period typically runs for one to five years, after which the loan reverts to principal and interest unless you negotiate an extension or refinance.

If you borrow $520,000 at 6.5 per cent on an interest-only basis, the monthly repayment is around $2,817. On principal and interest over 30 years, the repayment would be closer to $3,287. The difference of $470 per month improves cash flow, which matters when vacancy periods or maintenance costs arise.

The trade-off is that your loan balance does not reduce during the interest-only period, and when the loan reverts to principal and interest, repayments increase. Investors who plan to hold property long term often switch to principal and interest after a few years to build equity and reduce debt. Those focused on portfolio growth may prefer to keep repayments lower and use surplus cash flow to fund the next purchase.

Rental income in coastal areas like Rye and Blairgowrie can be seasonal, with higher returns during summer months and lower occupancy in winter. An interest-only structure provides more flexibility to manage those fluctuations without stretching serviceability during quieter periods.

Tax Treatment After 1 July 2027

From 1 July 2027, residential investment properties acquired on or after 7:30pm AEST on 12 May 2026 will be subject to quarantined loss rules unless they qualify as eligible new builds. Rental losses on affected properties can only be offset against other residential rental income or carried forward. They cannot be offset against salary or wage income.

If you purchase an established property using equity and the rental income does not cover the interest and other holding costs, the loss is quarantined. You can still claim all deductible expenses, including interest, but the benefit is deferred until you have other rental income or sell the property and realise a capital gain.

Properties held before 7:30pm AEST on 12 May 2026 continue under the existing rules, so equity releases structured before that date retain full negative gearing benefits. If you are considering a second purchase, the timing of acquisition and the type of property matter. Eligible new builds, including properties constructed on previously vacant land or developments that increase the dwelling count, remain fully deductible under the new regime.

For investors on the Mornington Peninsula, this distinction affects whether you target established homes in suburbs like Hastings or look for new apartment developments and subdivisions where negative gearing remains available. The choice depends on your income level, the expected rental yield, and how long you plan to hold the asset before selling.

Capital Gains Tax Changes and Holding Strategy

The same legislation replaces the 50 per cent CGT discount with cost base indexation and a 30 per cent minimum tax rate on real gains for properties acquired after the cut-off date. Gains accrued before 1 July 2027 on properties held at that time continue under the existing discount rules, so only the growth from 1 July 2027 onward is subject to the new treatment.

If you purchase an investment property now using home equity, the portion of any future gain that accrues before 1 July 2027 will be eligible for the 50 per cent discount when you eventually sell. Gains accruing after that date will be indexed for inflation and taxed at a minimum of 30 per cent.

Eligible new builds offer an election between the 50 per cent discount and indexation with the minimum tax, giving investors some flexibility depending on how inflation and property values move over the holding period. For most buyers, this makes new builds more attractive from both a deduction and a capital gains perspective.

The change does not affect your ability to use equity or the structure of the loan. It affects the after-tax return when you sell, which feeds into decisions about how long to hold and whether to reinvest or consolidate.

Structuring Loans to Preserve Deductibility

When you borrow against your home to fund an investment purchase, the purpose of the borrowing determines whether the interest is deductible. If you draw equity specifically to fund the deposit and costs on an investment property, that portion of the loan is deductible. If you later redraw funds for private purposes, such as renovating your home or buying a car, the interest on that redraw is not deductible.

Lenders allow you to split your home loan into multiple accounts, keeping the equity release in a separate split linked to the investment. This maintains a clear audit trail and ensures you can substantiate the deduction if the ATO requests records. Mixing private and investment purposes in a single loan account creates confusion and can result in partial disallowance of interest claims.

When structuring an investment loan, we recommend a separate loan account for the equity component and another for the investment property itself once it settles. Both loans are deductible because both are used to acquire or hold an income-producing asset, but keeping them separate simplifies reporting and protects your position if you refinance or sell one property later.

Risks and Serviceability If Property Values Fall

Borrowing against equity increases your total debt, and if property values decline, you can move into a position where your combined debt exceeds 80 per cent of the combined property values. Lenders do not typically force a sale or require you to reduce debt unless you seek to refinance or access further funds, but the reduced equity limits your options if you need to restructure.

If your home in Mornington was valued at $900,000 and you borrowed up to 80 per cent, then values drop 10 per cent, your home is now worth $810,000 and your LVR has increased. The same applies to the investment property. A dual decline affects serviceability for any future borrowing and may require you to reduce debt before accessing equity again.

Vacancy rates and rental demand also affect cash flow. The Mornington Peninsula has a higher proportion of holiday rentals in some precincts, which can deliver strong short-term returns but also longer vacancy periods outside peak season. If your investment is in a suburb like Sorrento or Portsea, rental income may fluctuate more than in areas with consistent long-term tenant demand, such as Frankston or Somerville. Structuring your loan with a buffer and maintaining cash reserves reduces the risk of financial pressure during low-occupancy months.

When to Consider Refinancing to Access Further Equity

As your properties increase in value and your loan balances reduce, additional equity becomes available. Refinancing lets you reset the valuation, recalculate usable equity and potentially fund a third purchase without selling either existing property.

Refinancing also gives you the opportunity to secure a lower rate, switch between fixed and variable, or consolidate loans with a single lender to reduce administration. Lenders compete for investment loan business, and the rate you were offered two years ago may no longer reflect current pricing. Running a loan health check every couple of years ensures you are not paying more than necessary and that your loan structure still aligns with your strategy.

If you refinance to access further equity, the same rules apply. The purpose of the new borrowing must be investment-related to preserve deductibility, and serviceability is reassessed using the current buffer and DTI settings. Timing the refinance to coincide with a property purchase can streamline the process and reduce the number of separate applications.

Call one of our team or book an appointment at a time that works for you. We work with lenders across Australia to structure investment loans that align with your property goals and ensure your equity is used in the most effective way.

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