The Pros and Cons of Using Home Equity to Buy

Using equity from your current property removes the most significant barrier to purchasing a second home: accumulating another deposit.

The approach bypasses years of saving by converting unrealised value in your existing property into useable funds. However, the structure you choose determines whether you preserve flexibility or create unnecessary constraints. Understanding how lenders assess equity, how cross-collateralisation affects your position, and what borrowing capacity calculations actually measure will directly influence both approval outcomes and long-term portfolio management.

How Lenders Calculate Useable Equity

Useable equity equals your property's current value minus any outstanding debt, multiplied by the maximum lending ratio your circumstances allow. Most owner-occupier scenarios permit borrowing up to 80% of the property's value without lender's mortgage insurance, meaning you can access equity up to that threshold minus your existing loan balance.

Consider a property valued at $500,000 with a remaining loan of $250,000. At 80% lending, the maximum loan against that property is $400,000, leaving $150,000 in accessible equity. That figure covers a 20% deposit on a $750,000 purchase plus associated costs. The calculation changes if you're willing to pay lender's mortgage insurance or if the second property will be investment-purpose, as lenders often cap investment lending at 90% combined loan-to-value ratio across your portfolio.

Inala property owners often sit on substantial equity without realising it, particularly those who purchased before the infrastructure upgrades around Inala Civic Centre and the renewed interest in affordable housing within 20 kilometres of Brisbane CBD. If you purchased five to seven years ago, your property's value has likely increased enough to fund a deposit elsewhere, even if you've been prioritising offset accounts over principal reduction.

Borrowing Capacity Versus Available Equity

Having sufficient equity does not guarantee approval for the second purchase. Borrowing capacity measures your ability to service both loans simultaneously, and lenders assess this independently of how much equity you hold.

Your capacity calculation includes all existing debts, living expenses, and the proposed new loan repayment. If your income comfortably services the current mortgage but adding a second loan pushes your debt-to-income ratio above lender thresholds, the application fails regardless of equity position. This distinction catches borrowers who assume equity alone determines approval.

Lenders typically assess rental income from investment properties at 70% to 80% of the actual rental figure to account for vacancy and management costs. If you're purchasing an investment property in a suburb with rental yield around 4%, that income may not offset the full loan repayment in the serviceability calculation, meaning you'll need surplus income capacity beyond the rent to gain approval.

Cross-Collateralisation and Portfolio Flexibility

The most consequential decision when using equity involves whether to cross-collateralise your properties. Cross-collateralisation links multiple properties as security for a single loan facility, giving the lender a claim over all properties if you default on any loan within the structure.

Many lenders default to cross-collateralised structures because it simplifies their risk management. You provide equity from Property A, purchase Property B, and both properties secure both loans. The approach streamlines the initial approval process and may reduce documentation requirements, which explains why some brokers position it as the standard method.

The constraint surfaces later. If you want to refinance one property to access a lower rate or better loan features, you'll need consent from the lender holding both properties. If you want to sell one property, the lender must agree to release it from the security pool, often requiring you to demonstrate that the remaining property provides sufficient security for the outstanding debt. That release process can delay settlement or, in some cases, prevent a sale from proceeding if your equity position has deteriorated.

Separate securities avoid this entirely. You retain an existing loan against Property A and establish a new loan against Property B, with each property securing only its respective loan. The structure requires more documentation upfront and may involve slightly higher interest rates if one loan sits at a higher loan-to-value ratio, but it preserves the ability to manage each property independently.

The Mechanics of Equity Release Without Refinancing

You can access equity without refinancing your existing loan by establishing a separate loan secured against the same property. This approach, sometimes called a split or standalone equity loan, maintains your current loan terms while drawing additional funds for the new purchase.

The method works when your current loan rate or features are worth preserving. If you fixed at a favourable rate or hold a loan with offset accounts and redraw facilities you actively use, refinancing the entire balance to access equity may cost more than establishing a second loan for the equity portion alone.

Lenders will still assess the total debt against the property's value and your serviceability, so the approval criteria remain the same. The difference lies in preserving the existing loan structure rather than rolling everything into a new facility. Not all lenders offer this structure cleanly, and some will push toward a full refinance to consolidate their position, so the approach requires specific product knowledge and lender selection.

Costs Beyond the Deposit

Accessing equity covers the deposit but rarely covers the full cost of purchasing a second property. Stamp duty, conveyancing, building and pest inspections, and lender fees still apply, and these typically add another 3% to 5% of the purchase price depending on the property's value and location.

If your equity release calculation only accounts for a 20% deposit, you'll need additional funds in accessible savings or a larger equity draw to cover these costs. Some borrowers increase the loan amount on the new property to cover costs, which raises the loan-to-value ratio and may trigger lender's mortgage insurance. That insurance premium can range from a few thousand dollars to over $20,000 depending on the loan size and deposit percentage, and it's capitalised into the loan rather than paid upfront in most cases.

Calculating total funds required before initiating the equity access process prevents timing issues at settlement. Running the numbers through a detailed costing estimate, including all government charges and third-party fees, gives you a realistic target for the total equity draw or loan structure needed.

Structuring for Tax Efficiency When Purchasing Investment Property

If the second property will generate rental income, loan structure directly affects tax deductions. Interest on debt used to purchase an income-producing asset is deductible, while interest on debt used for private purposes is not.

Drawing equity from your owner-occupied property to fund an investment purchase means the new loan against the investment property is fully deductible, but any increase in debt against your existing owner-occupied property is not. The cleaner approach separates the loans entirely: retain the existing owner-occupied loan as is, and establish a new loan secured against the investment property for the full purchase price plus costs.

If you need to increase the loan against your existing property to access cash for the deposit, that portion remains non-deductible. Mixing deductible and non-deductible debt within a single loan facility complicates record-keeping and limits your ability to maximise offset account benefits on the non-deductible portion. Structuring with precision from the outset avoids years of suboptimal tax outcomes.

Timing and Pre-Approval with Equity-Based Purchases

Establishing pre-approval before engaging with vendors or agents clarifies exactly how much equity you can access and what purchase price your borrowing capacity supports. Pre-approval also accelerates settlement once you secure a contract, as the lender has already verified your financial position and loan structure.

The pre-approval process for equity-based purchases requires a current valuation of your existing property. Some lenders accept automated valuations, while others require a full physical inspection depending on the property type and location. That valuation determines the useable equity figure, so any variance between your assumption and the lender's assessed value will directly affect the funds available.

Pre-approval validity typically extends 90 days, though some lenders offer longer periods. If you're targeting a specific property type or location and expect the search to take several months, confirm the pre-approval timeframe and any conditions that would require reassessment before formal application.

When Selling and Repurchasing Makes More Sense

Using equity to purchase a second property assumes you want to retain the first property, either as an investment or because it remains your primary residence. If your current property no longer suits your needs and the second purchase is intended as your new home, selling and repurchasing avoids the complexity of servicing two loans.

The calculation depends on capital gains tax implications, transaction costs, and whether the rental yield on your current property justifies retaining it. If you're holding an owner-occupied property with no capital gains tax exposure, selling releases the full equity without ongoing loan commitments. If the property has appreciated significantly and converting it to an investment triggers a future tax liability, retaining it and using equity may preserve wealth more effectively.

Running both scenarios through detailed projections, including holding costs, rental income, tax implications, and opportunity cost of tied-up equity, reveals which approach aligns with your medium-term financial position. The decision is rarely obvious without specific numbers.

Accessing equity to purchase a second property compresses timelines and removes the deposit accumulation bottleneck, but the structure you choose will either preserve flexibility or create constraints that surface years later. If you're considering this approach and want to structure it correctly from the outset, call one of our team or book an appointment at a time that works for you.

Frequently Asked Questions