Years of mortgage repayments, combined with Brisbane’s strong property value growth, have quietly built up significant equity for many homeowners. Yet when the idea of buying a second property or upsizing comes up, the first instinct is often to start saving a cash deposit all over again. That instinct makes sense, but it overlooks a legitimate strategy that many Australians miss entirely: using equity as a deposit for their next purchase, drawing on the value already sitting in their existing home.
Lenders have long accepted equity-backed deposits as a valid approach. It works for investors wanting to enter the market without draining savings, and for upsizers who need to secure their next home before being pushed into a rushed sale. What it requires is a clear understanding of how much equity you can actually access, what approval conditions apply, and what the real costs are. This guide walks through all of it, step by step.
The nuance is in the structure. Getting access to equity is one thing; setting it up in a way that protects your tax position, preserves your borrowing capacity, and keeps your loans working efficiently is another. That is where working with a strategic mortgage adviser, rather than simply walking into a bank branch, makes a tangible difference.
How to calculate your usable equity when using equity as a deposit
Before you approach a lender, you need a precise number to work with. Total equity, your property’s current value minus your outstanding loan balance, is not the figure that matters here. Lenders apply a cap before they will release any of it.
The formula lenders use
Most Australian lenders set the usable equity ceiling at 80% of your property’s current value, minus whatever you still owe on the mortgage. The 20% buffer protects the lender’s security position, and borrowing above it generally triggers Lenders Mortgage Insurance (LMI). The working formula is straightforward: usable equity = (property value × 0.80) minus outstanding loan balance. If the result is zero or negative, there is nothing available to release until the loan is paid down further or the property value increases.
A worked example with real numbers
Take a Brisbane property currently valued at $800,000 with a mortgage balance of $440,000. Multiply $800,000 by 0.80 to get $640,000, then subtract the $440,000 loan balance. The result is $200,000 in usable equity. That $200,000 can be used as the deposit on a new purchase without a single extra dollar in savings. This figure is exactly what a lender will work from when assessing your application, though note that some lenders may also require evidence of genuine savings or apply additional product-specific conditions alongside the equity calculation.
Using equity as a deposit, three access options
How you access equity affects your interest rate, flexibility, tax records, and overall loan structure. There is no single right answer, and the best option depends on your circumstances and goals.
Refinancing your existing loan
Refinancing to a higher loan amount is a widely used method. The new lender pays out your old loan and advances the additional funds, which you use as the deposit on your next purchase. This approach often secures a competitive rate and consolidates your borrowing into a clean structure. It does involve breaking and re-establishing a loan, so it is worth factoring in any discharge or establishment fees before committing.
A home equity line of credit (HELOC Australia)
A line of credit, sometimes referred to as a HELOC in the Australian context, gives you an approved credit limit secured against your property. You draw on it as needed and pay interest only on what you have actually used, not the full approved limit. This offers flexibility for staged purchases, renovations, or situations where you are not certain of the exact deposit amount required. The trade-off is that HELOC products in Australia currently carry rates roughly in the 6.4% to 6.9% per annum range (as at August 2026, based on comparison-site data), which is higher than a standard variable home loan.
A separate equity loan or split
Some lenders structure the equity release as a distinct loan split sitting alongside your existing mortgage, rather than folding everything into one facility. This keeps the equity borrowing clearly separate from your original home loan, which matters significantly for tax record-keeping when the funds are directed toward an investment property. A clean loan split from the start avoids the complications of mixed-purpose borrowing and makes the ATO’s apportionment rules far simpler to apply at tax time.
What lenders look at before approving equity access
Understanding lender requirements before you apply saves time and prevents unpleasant surprises midway through an application. Lenders assess two things: whether your existing property supports the release, and whether you can service the resulting debt.
The 80% LVR boundary and what it means in practice
Staying at or below 80% LVR across your total borrowings is the clean line. Below it, you avoid LMI and access the most competitive rates. Above it, LMI applies and rates rise. For investment property lending specifically, most lenders hold firm at the 80% threshold without LMI; non-bank lenders and some second-tier authorised deposit-taking institutions (ADIs) may stretch to 85% on well-documented applications. The LMI cost itself is not trivial: premiums at 85% LVR typically run between 1.0% and 1.6% of the loan amount, and at 90% LVR that rises to around 2.0% to 3.0% (based on 2026 LMI premium grids from major insurers). These are one-off upfront costs that are not refunded if you later sell or refinance.
Serviceability: the test that matters most
Having available equity does not automatically mean a lender will approve the release. Lenders stress-test your ability to service both the equity loan and the new purchase loan at a rate higher than the current market rate, typically around 3 percentage points above the actual rate offered, though this buffer can vary by lender. Your income, existing liabilities, living expenses, and combined repayment obligations all feed into this calculation. Many borrowers discover their equity is accessible in theory but their serviceability is the actual constraint in practice.
Documentation your lender will request
Expect to provide a formal property valuation on your existing home, recent payslips or tax returns depending on your employment type, three to six months of bank statements, a full list of existing debts and liabilities, and standard proof of identity. If the new purchase is an investment property, a rental appraisal from a local property manager is also commonly required to support the income projection used in the serviceability assessment.
Two scenarios that show equity access in action
Abstract numbers are easier to absorb when they are attached to real situations. The two scenarios below cover the most common reasons Australian property owners pursue equity-backed purchases.
Scenario 1: Using equity as a deposit for an investment property
A Brisbane homeowner has a property valued at $900,000 with a remaining loan balance of $500,000. Applying the formula: ($900,000 × 0.80) minus $500,000 gives usable equity of $220,000. That $220,000 is sufficient to fund a 20% deposit on a $1.1 million investment property, provided the new loan is structured correctly and serviceability holds. The investor enters the market without liquidating managed funds, drawing on savings, or waiting years to accumulate a fresh cash deposit. Both loans remain below 80% LVR, so LMI is avoided on both sides of the transaction.
Scenario 2: Using equity to upsize without a bridging loan
A homeowner has a property valued at $700,000 with $300,000 remaining on the mortgage and plans to purchase a $900,000 home. The usable equity calculation produces: ($700,000 × 0.80) minus $300,000 = $260,000. That is enough to cover the 20% deposit of $180,000 on the new property. In Queensland, stamp duty on a $900,000 non-primary-residence purchase is approximately $30,000, $35,000 (verify your exact liability with a conveyancer, as duty rates vary by buyer type and eligibility). Together, the equity comfortably covers both costs without requiring a bridging loan or a forced same-day settlement. The buyer retains control over the timing of their existing property sale, reducing the pressure of a rushed result in a market that rewards patience.
Costs, risks, and tax considerations worth understanding
Equity access is a powerful tool. Committing to it without a full picture of the costs and risks, however, is how borrowers end up in a worse position than where they started, so it pays to work through the numbers carefully before proceeding.
LMI, fees, and interest rate considerations
Borrowing above 80% LVR on either property triggers LMI, which can run into tens of thousands of dollars on higher loan amounts and is not refunded if you later sell or refinance. Home equity loan products currently carry rates roughly in the 5.6% to 7.6% per annum range, while HELOC facilities typically sit at the 6.4% to 6.9% end of that band (as at August 2026; rates vary by lender and product). Some lenders also charge establishment, package, or ongoing annual fees. These costs reduce the net benefit of the strategy if they are not factored in before the decision is made.
Impact on borrowing capacity and your buffer
Releasing equity increases your total debt load, which directly reduces your remaining borrowing capacity for any future purchases or financial moves. It also reduces the security buffer your existing property provides. Overstretching at this stage can leave little room to absorb interest rate movements or unexpected expenses, a meaningful risk in a lending environment where rates can shift materially within a 12-month period.
Tax implications for investment use
When equity is directed toward an income-producing investment property, the interest on those borrowed funds is generally tax-deductible as an investment expense under ATO guidelines. The structure of the loan matters here: if the equity release is mixed with private-use borrowing in the same facility, the interest must be apportioned between deductible and non-deductible portions, creating ongoing record-keeping complexity. Keeping the equity release as a separate, clearly defined loan split from the outset is the cleaner approach, and it is worth confirming the structure with a tax professional before settlement.
How to structure your equity strategy before you apply
Accessing equity is only half the equation. The way your loans are structured from day one determines your long-term flexibility, tax position, and ability to continue building your property position over time. A poorly structured arrangement can cost far more to unwind than the few extra weeks it takes to get it right initially.
Steps to prepare your equity application
- Obtain an independent market appraisal on your current property to establish an accurate value for the usable equity calculation.
- Apply the 80% formula to calculate your actual usable equity figure before approaching any lender.
- Review your income, regular expenses, and existing debt commitments honestly against a serviceability test at a rate 3% above current market rates.
- Identify which access method suits your goal: refinancing, a line of credit, or a separate equity split.
- Gather your documentation before making contact with a lender or broker to avoid delays in the process.
Why structure matters as much as access
A mortgage adviser who specialises in equity-backed loan structures brings a strategic view of how each loan component fits together across your entire financial position, something a standard bank application process rarely provides. At Your Home Loan Consultant, this is the work we do with clients who are building investment portfolios, upsizing, or looking to consolidate debt efficiently. The right structure from day one avoids costly restructuring later and ensures every dollar of debt is working toward your goals.
From calculation to application: your next steps
Using equity as a deposit is a well-established strategy that Australian homeowners with sufficient equity and serviceability can action without waiting years to accumulate another cash deposit. The formula is straightforward, the access options are well-defined, and the lender requirements are predictable once you understand what they are looking for.
Start with the calculation: apply the 80% formula to your current property value and outstanding balance to find your usable equity figure. From there, choose the access method that matches your goal and run your income and expenses through a honest serviceability check before you approach any lender. Factor in all costs, LMI, establishment fees, and the ongoing rate differential, and structure your loans deliberately to protect your tax position and preserve future borrowing capacity.
If your numbers stack up and you are ready to move beyond the spreadsheet, speak with an adviser at Your Home Loan Consultant about building a loan structure around your specific property goals. Using equity as a deposit is only the starting point, how it is structured determines what you can do next.
Frequently asked questions about using equity as a deposit
Can I use equity as a deposit for an investment property?
Yes. Using equity as a deposit for an investment property is one of the most common applications of this strategy. Provided you stay within the lender’s LVR limits and can demonstrate serviceability across both loans, most major lenders will consider the application. Structuring the equity release as a separate loan split is strongly recommended for tax purposes.
How much equity do I need to use equity as a deposit?
You need enough usable equity, calculated as (property value × 0.80) minus your outstanding loan balance, to cover the deposit on the new property, plus purchase costs such as stamp duty and conveyancing fees. For a 20% deposit on a $900,000 property, that means at least $180,000 in usable equity before costs.
Will using my equity as a deposit affect my existing home loan?
Yes, in most cases. Whether you refinance to a higher balance, open a line of credit, or establish a separate loan split, the total debt secured against your existing property increases. This affects your LVR, your monthly repayments, and your overall borrowing capacity for future lending.
Do I need to pay LMI when using equity as a deposit?
Not if you stay within an 80% combined LVR. If releasing the equity pushes your total borrowing above 80% of your property’s value, LMI will apply. Premiums at 85% LVR typically run between 1.0% and 1.6% of the loan amount and are not refundable if you later sell or refinance.
Is the interest on an equity loan tax-deductible?
If the equity is used to purchase an income-producing investment property, the interest on those borrowed funds is generally tax-deductible under ATO guidelines. The deductibility depends on how the loan is structured, mixed-purpose facilities require interest apportionment, which complicates your records. Confirm the structure with a qualified tax adviser before settlement.