Using Equity to Buy an Investment Property in Australia

Key Highlights

Your usable equity is not your total equity as lenders cap access at 80% LVR
Multiply your usable equity by four to estimate your maximum investment property purchase price
Keep your loans structurally separate to avoid cross-collateralisation
Negative gearing reduces your real holding cost but is not a reason to buy a poor investment
Loan structure determines what interest you can claim as mixing personal and investment debt costs you deductions

If you have owned your home for a few years, there is a reasonable chance you are sitting on a deposit for your next property without realising it. Every dollar of growth in your home’s value, and every principal repayment you have made, has been building equity. And in many cases, that equity can be put to work funding an investment property purchase without requiring a single dollar of additional savings.

Using equity to buy an investment property is one of the most common ways experienced property investors grow their portfolios in Australia. It is also one of the most misunderstood. This guide explains exactly how it works, how much you can access, how to access it in a way that protects your financial position, and how to structure the transaction to maximise tax efficiency.

Logan Stanford, the founder of Stanford Financial, built his first investment using equity from a residential property before the age of 25. This is not a strategy reserved for experienced investors with large portfolios. It is available to any homeowner who has built sufficient equity and can service the additional debt.

Use our LVR and equity calculator to check your current usable equity position before reading further. The numbers in this guide will make more sense with your actual figures in front of you.

What Is Home Equity?

Home equity is the portion of your property’s value that you own outright, free of mortgage debt. It is the difference between what your property is currently worth and what you still owe on it.

If your home is worth $800,000 and you have a $480,000 mortgage remaining, your equity is $320,000. That is 40% of the property’s value.

Equity builds in two ways:

Repayments: every principal repayment you make reduces your loan balance and increases your equity. On a $600,000 principal and interest loan at 6.5% over 30 years, you pay down approximately $8,000 in principal in year one, rising to roughly $20,000 in year ten as the interest-to-principal ratio shifts
Capital growth: when your property’s value increases, your equity grows even without making any additional repayments. In high growth corridors of South East Queensland, properties that were purchased for $500,000 in 2019 have in many cases grown to $700,000 or more, adding $200,000 to the owner’s equity position without any contribution from them beyond their original deposit and regular repayments

The combination of these two forces, debt reduction and value growth, is what makes time in the property market so powerful. A homeowner who has owned for five to ten years in a growing area can often access enough equity to fund an entire investment property deposit without touching their savings.

Total Equity vs Usable Equity: Understanding the Difference

This is the most important distinction to understand before pursuing an equity-funded investment purchase, and it is the one most guides gloss over.

Total equity is simply your property’s value minus your loan balance. It is a useful number to know but it is not the number that matters for an investment purchase.

Usable equity is the portion of your total equity that a lender will actually allow you to access while keeping your combined loan balance at or below 80% of your property’s value. The 80% LVR threshold is the standard limit above which Lenders Mortgage Insurance becomes payable on residential property, and most lenders will not allow an equity draw that takes you above this threshold without LMI.

The formula:

Usable Equity = (Current Property Value × 0.80) − Outstanding Loan Balance

Worked example:

Current property value: $800,000
Outstanding loan balance: $480,000
80% of property value: $640,000
Usable equity: $640,000 − $480,000 = $160,000

Your total equity in this example is $320,000. But the amount you can actually access without paying LMI is $160,000. The remaining $160,000 sits below the 80% LVR line and is not accessible under standard lending conditions unless you are prepared to pay LMI on the draw.

This is where many would-be investors get stuck. They calculate their total equity, find a property they want to buy, and then discover the lender will only advance a fraction of what they expected. Always calculate usable equity at the 80% LVR threshold before committing to a purchase price.

The Rule of Four: How Much Property Can Your Equity Buy?

Once you know your usable equity, you can estimate the maximum purchase price of an investment property you could acquire using that equity as the deposit. This is where the rule of four comes in.

Because most lenders require a 20% deposit on investment property purchases (or allow less with LMI), your usable equity effectively needs to cover 20% of the purchase price plus purchase costs. Purchase costs in Queensland (conveyancing, stamp duty, loan establishment, building and pest) typically add another 3% to 5% on top of the purchase price.

A conservative working rule is to multiply your usable equity by four to get an approximate maximum purchase price, because $1 of usable equity is needed for every $4 of property value (20% deposit) plus a buffer for costs.

Using the $160,000 usable equity figure from the example above:

Rule of four: $160,000 × 4 = $640,000 maximum purchase price
At $640,000, the deposit required is $128,000 (20%), leaving $32,000 for purchase costs
If costs come in higher, the maximum purchase price reduces accordingly

This is a starting estimate, not a guarantee. The lender’s actual assessment will also depend on your income, existing liabilities, and the rental income the investment property can support. Some lenders will allow investment purchases at 90% LVR with LMI, which changes the calculation. A broker can model the exact figures for your situation.

Our usable equity calculator automatically computes how much property you could fund with a 5%, 10%, or 20% deposit from your available equity. Enter your property value and loan balance to see the figures.

How to Access Your Equity

There are four main mechanisms for accessing home equity to fund an investment purchase. They each have different cost profiles, timelines and structural implications.

Method	Speed	Cost	Best For
Loan top-up	Fast	Low	Simple, single lender, straightforward equity access
Refinance	2 to 4 weeks	Moderate	Better rate + equity access in one transaction
Line of credit	Ongoing	Setup fee	Flexible drawdown for staged purchases or renovations
Cross-collateralisation	Fast	Low upfront	Caution — see detail below before proceeding

Loan top-up

A loan top-up which is also called a loan increase or equity release is the simplest approach. You apply to your existing lender to increase your home loan up to 80% LVR, and the additional funds are released as a lump sum or separate split that you use as the deposit for the investment purchase.

The advantage is simplicity and speed. You stay with your existing lender, the process is relatively straightforward, and in most cases the funds can be available within two to three weeks. The main limitation is that you are restricted to your current lender’s products and rates. If your current lender’s investment loan rate is not competitive, you are locked into a suboptimal position unless you also refinance.

Refinance with equity access

Refinancing allows you to move to a new lender at a more competitive rate and access your equity in the same transaction. You pay out your existing loan with the new lender’s funds, which are set at a higher amount to include the equity draw, and the difference is released to you.

The advantage is the ability to simultaneously optimise your rate and access equity. The disadvantage is the time and cost of a full refinance application which typically takes between two to four weeks, with discharge fees from your existing lender and potentially a break cost if you are on a fixed rate. If your current rate is competitive, a top-up is likely more efficient.

Line of credit

A line of credit (sometimes called a home equity loan or equity access loan) establishes a revolving credit facility secured against your home, up to your usable equity limit. You draw from it as needed rather than taking a lump sum upfront.

This structure suits investors who want flexibility, for example, those planning a staged approach to property or renovation where costs are uncertain. The main consideration is that a line of credit is typically an interest-only facility, which means the principal does not reduce over time and the risk of owing the full amount indefinitely is real. Some borrowers also find that easy access to the funds reduces their discipline around drawdown. For a straightforward investment purchase where the deposit amount is known, a top-up or refinance is usually more appropriate.

Cross-collateralisation — proceed with caution

Cross-collateralisation is where you offer your existing property as additional security for the new investment loan, rather than drawing equity separately. Instead of releasing equity from your home loan and using it as the deposit, the lender holds both properties as combined security for both loans.

Lenders sometimes encourage this structure because it is simpler for them to process and gives them greater security over your assets. However, it creates significant problems for investors over the long term:

You lose the ability to sell either property independently. If you want to sell the investment property, the lender must revalue both properties and confirm the combined security still supports the remaining debt before they will release one from the portfolio
Refinancing becomes much harder. Moving lenders requires both properties to be valued and transferred simultaneously, which is costly and complex
Portfolio growth is restricted. As you try to acquire more properties, the cross-collateralised structure compounds in complexity with every additional purchase
Loan-to-value assessments become muddled across the portfolio, making it difficult to identify and access equity in individual properties

The strong consensus among experienced property investors and finance professionals is to keep investment loans structurally separate from your home loan. Draw the equity from your home as a separate loan split, use it as the deposit, and secure the investment loan against the investment property only. This is cleaner, more tax-efficient, and gives you far greater flexibility over time.

What Lenders Assess Beyond Your Equity

Having sufficient equity is a necessary condition for an equity-funded investment purchase, but it is not sufficient on its own. Lenders still conduct a full serviceability assessment to confirm you can afford the combined debt.

Income and existing expenses

The lender will assess your gross income from all sources (salary, business income, rental income from existing investment properties) and measure it against your total committed expenses including the new loan repayments. Most lenders apply a stressed interest rate (typically 3% above the actual rate) to all loan balances when calculating serviceability, which means the income bar is higher than the actual repayments would suggest.

Rental income from the new property

Most lenders will include a proportion of the projected rental income from the investment property you are purchasing in the serviceability assessment. The typical treatment is to include 80% of the gross weekly rent as assessable income (the 20% haircut accounts for vacancy, management fees, and maintenance). This rental income contribution can meaningfully improve your assessed borrowing capacity, particularly on properties with strong rental yields.

Existing debt commitments

Any existing credit cards, personal loans, car loans, or other mortgages will be included in the assessment as monthly commitments that reduce your available income. Credit cards in particular are assessed at a full repayment of the credit limit, not the outstanding balance. If you have a $20,000 credit card limit you rarely use, the lender treats it as a $600 per month commitment regardless of the actual balance.

Stress testing

Lenders are required under responsible lending obligations to confirm that borrowers can still service their debts if interest rates rise by 3% above the current rate. On a $1,200,000 combined loan portfolio at a real rate of 6.5%, a 3% stress add-on takes the assessed rate to 9.5%, which can reduce assessed borrowing capacity significantly. This is why some borrowers with substantial equity find their borrowing capacity is the binding constraint rather than their deposit.

Negative Gearing Explained

Negative gearing is when the costs of owning an investment property (loan interest, rates, insurance, management fees, maintenance, and depreciation) exceed the rental income the property generates. The result is a net annual loss on the property.

In Australia, this net loss can be deducted from your other taxable income, which reduces the income tax you pay. The tax saving does not eliminate the loss, but it reduces the real out-of-pocket cost of holding the property.

How the numbers work

Assume you buy a $600,000 investment property in Springfield with a $600,000 interest only loan at 6.5%:

	Negatively Geared	Positively Geared
Annual rent	$26,000	$31,200
Loan interest (IO, 6.5%)	$39,000	$39,000
Other expenses	$8,000	$8,000
Gross shortfall	$21,000	+ $4,200 income
Tax saving (37% bracket)	~$7,770	N/A
Real after-tax cost	~$13,230/yr ($254/wk)	+ $4,200/yr ($81/wk)

The negatively geared scenario assumes a lower rent ($500/week), producing an annual loss of $21,000. At a 37% marginal tax rate, the tax saving is approximately $7,770, reducing the real holding cost to approximately $13,230 per year or $254 per week. The investor is effectively paying $254 per week from their own income to hold a $600,000 asset.

The positively geared scenario assumes a higher rent ($600/week), where rental income exceeds all costs and the property returns a net annual income of $4,200 without any out-of-pocket contribution.

The role of depreciation

Depreciation on the building structure and on fixtures and fittings (plant and equipment) can be claimed as a non-cash deduction against rental income, which increases the tax benefit of holding an investment property without any additional cash outlay. For a new property, building depreciation alone can add $5,000 to $15,000 in annual tax deductions depending on the construction cost. A quantity surveyor’s depreciation schedule is required to claim these deductions.

The real purpose of negative gearing

Negative gearing is not a strategy in itself. It is a consequence of having a rental yield insufficient to cover the loan cost — typically because the investor has paid a high price for a property in expectation of strong capital growth. The tax benefit reduces the real cost of holding that growth asset while it appreciates. It does not make a bad investment good.

Stanford Financial strongly recommends seeking independent tax advice from an accountant or tax adviser before structuring an investment based on negative gearing benefits. Tax laws change and individual circumstances vary significantly. Negative gearing should be a consequence of a sound investment thesis, not the primary reason for making the purchase.

Risks to Consider Before Using Equity

Using equity to invest in property is a sound strategy when executed correctly. It also introduces risks that need to be understood and actively managed.

Interest rate rises

An equity-funded investment purchase typically increases your total debt significantly. If you have a $480,000 home loan and add a $600,000 investment loan, your total debt is $1,080,000. A 1% interest rate rise increases your annual interest bill by $10,800. At 2%, that becomes $21,600. Stress-testing your own financial position at current rates plus 2% before proceeding is not optional — it is the minimum due diligence.

Vacancy periods

A property that is not tenanted generates no rental income while costs continue. A two to four week vacancy between tenants is common and should be factored into your cash flow planning. In softer rental markets, vacancies can extend considerably longer. Maintaining a cash buffer equivalent to three to six months of loan repayments on the investment property protects you from forced selling if rental income is interrupted.

Capital growth uncertainty

Property values do not always rise. In some markets and cycles, they fall. An investment property purchased at 90% LVR in a market that then declines 15% to 20% can result in negative equity, where the debt exceeds the property’s value. While this outcome is typically temporary in established growth markets, it can restrict your ability to sell or refinance for years. Buying in areas with strong underlying demand fundamentals reduces but does not eliminate this risk.

Impact on your home loan position

Drawing equity from your home loan increases your LVR on that property. If your home was sitting at 60% LVR and you draw equity to take it to 78%, you have less buffer if your home’s value falls or if you need to refinance. It is important to consider the effect on your home loan as well as the investment loan when modelling the transaction.

Concentration risk

Equity from your primary residence funding an investment property means two of your significant assets are linked by debt. If property markets in your area weaken simultaneously, your home and your investment are both in South East Queensland for example, both assets may fall in value at the same time while your debt obligations remain fixed. Diversifying geographically across your portfolio over time can reduce this concentration risk.

How to Structure Your Loans for Tax Efficiency

The way your loans are structured has a direct and significant impact on how much interest you can claim as a tax deduction and how clean your records are for your accountant. This is one of the areas where a broker’s advice is most valuable, and where going direct to a bank and accepting their standard structure can cost you thousands in tax deductions over the life of the loan.

Keep investment debt separate from personal debt

The ATO determines deductibility based on the purpose of the borrowing, not the security. Interest on funds borrowed to purchase an income-producing investment property is deductible. Interest on funds borrowed to purchase or improve your home is not.

This means if you mix investment and personal borrowings in the same loan account, you lose the ability to clearly establish what proportion of the interest is deductible. The ATO is strict on this as mixed purpose loans create complex apportionment problems that most accountants would rather avoid entirely.

The correct structure for an equity-funded investment purchase:

Split 1: Your existing home loan – no change. The interest on this split is not deductible
Split 2: A new loan split secured against your home up to 80% LVR – this is the equity draw that will be used as the investment deposit. The interest on this split is fully deductible because the purpose of the borrowing is to fund an income-producing investment
Split 3: The investment property loan – secured against the investment property. Fully deductible

This three-split structure keeps all three loan purposes clean and separate, making the accountant’s job straightforward and ensuring you claim every dollar of deductible interest.

Do not park personal funds in the investment loan account

Once an investment loan account is established, do not use it for any personal purpose. Paying a personal expense from the investment loan account, even a single transaction, contaminates the loan’s deductibility and requires apportionment of interest across the full loan balance. Some borrowers also mistakenly park their salary in the investment offset account to reduce interest, which is legitimate as long as the funds are not then used for personal expenses from that account. Speak to your accountant before setting up an offset on an investment loan.

Interest only vs principal and interest on investment loans

Many investors choose interest only repayments on investment loans during the accumulation phase of their portfolio. The logic is straightforward: the interest is deductible, so paying principal with after-tax dollars is an inefficient use of income. Instead, directing surplus income to your non-deductible home loan, either through extra repayments or an offset account, reduces the non-deductible debt faster while keeping the deductible investment debt higher.

This is a well-established and legitimate tax strategy when implemented correctly. It requires that you actually do redirect the surplus to your home loan rather than spending it. An accountant can model the after-tax impact of interest only versus principal and interest for your specific income bracket and loan configuration.

These loan structuring recommendations are general in nature and should be confirmed with an independent tax adviser before implementation. Individual circumstances vary and tax law changes. Stanford Financial arranges the loan structure; your accountant advises on the tax implications.

Is Now a Good Time to Invest in Queensland Property?

Market timing is not something any broker or anyone else can predict with certainty. What can be assessed is the structural demand and supply position in specific markets, which provides a more reliable basis for an investment decision than short-term price movement.

The Ipswich and Springfield corridor

The Ipswich local government area, which includes Springfield, Ripley, Redbank Plains and the growing Ripley Valley corridor, is one of the strongest population growth stories in Australia. The region is projected to add more than 100,000 residents over the next decade, driven by the Springfield Central urban hub, the Ripley Valley Priority Development Area, and ongoing infrastructure investment including the Ipswich Motorway upgrades and the expanding rail network.

Housing supply in the established suburbs cannot keep pace with this population growth, which supports both rental demand and capital values in the medium term. Gross rental yields in the 4.5% to 5.5% range for houses in the $550,000 to $700,000 price bracket make the cash flow position manageable for investors at current interest rates, particularly with an interest only structure.

Logan corridor

Logan City, spanning the corridor between Brisbane’s southern suburbs and the Gold Coast, has continued to attract investment interest due to its relative affordability compared to inner Brisbane and its access to employment along the Logan Motorway and Pacific Motorway corridors. The Flagstone and Yarrabilba Priority Development Areas are adding significant housing stock, while established suburbs like Springwood, Shailer Park and Loganholme offer existing infrastructure and established rental markets.

Gold Coast

The Gold Coast remains one of Australia’s strongest property markets driven by interstate migration, tourism infrastructure, the 2032 Olympic effect on major infrastructure investment, and genuine lifestyle demand. Entry prices are higher than the Brisbane fringe growth corridors, which typically means lower gross yields but historically stronger capital growth in premium pockets.

The broader Queensland picture

Queensland property is entering the 2032 Olympic cycle with significant committed infrastructure investment across South East Queensland including the Sunshine Coast rail link, Cross River Rail, and multiple highway upgrades. Infrastructure investment historically precedes population growth and property value appreciation in the surrounding areas. Investors who positioned in areas along these corridors in the three to five years before completion have historically seen above-average returns.

Stanford Financial does not provide property investment advice and recommends seeking independent advice from a licensed buyer’s agent or property investment adviser before selecting a specific property. Our expertise is in structuring the finance correctly once you have identified the right property.

How Stanford Financial Can Help

Stanford Financial is a Brisbane-based mortgage brokerage with access to over 50 lenders, including lenders that specifically target investment property finance and have more flexible serviceability assessments for property investors than the major banks.

Usable equity calculation: we confirm your actual usable equity position with a lender’s valuation rather than relying on online estimates, which can be materially different from the lender’s number
Loan structure: we set up the three-split structure from the outset so your home loan, equity draw, and investment loan are correctly separated for tax purposes
Lender matching: the right lender for an equity-funded investment purchase is not necessarily your existing home lender. We compare assessment policies across the panel to find the lender whose serviceability model best accommodates your income and the property’s rental yield
Investment-specific lenders: some lenders treat rental income from the new property more generously than others (100% rather than 80% in some cases), which can meaningfully increase your borrowing capacity. We know which lenders apply which treatment
Rate comparison: investment loan rates vary more across lenders than owner-occupier rates. We compare the full panel rather than accepting the rate your existing lender offers for the equity draw
Pre-approval before you purchase: we arrange a pre-approval that confirms your borrowing capacity against the equity draw before you commit to a property, so you negotiate from a confirmed financial position

Frequently Asked Questions

How much equity do I need to buy an investment property?

You need enough usable equity to cover the investment property deposit (typically 20% to avoid LMI, or 10% with LMI) plus purchase costs of approximately 3% to 5%. As a working rule, divide your usable equity by 0.22 to 0.25 to estimate the maximum purchase price. On $160,000 in usable equity, you could target a property in the $640,000 to $730,000 range depending on purchase costs and whether you use LMI.

Can I use equity to buy an investment property without a cash deposit?

Yes, in most cases. If you have sufficient usable equity in your home, that equity can serve as the entire deposit for the investment property purchase. You draw the equity as a separate loan split secured against your home, and use those funds as the deposit. The investment property loan then covers the remaining 80% (or more if LMI is used). No additional cash savings are required, though having a buffer for holding costs and any purchase cost shortfall is advisable.

What is the difference between a loan top-up and refinancing to access equity?

A loan top-up increases your existing home loan with your current lender to release equity. It is faster and simpler but locks you into your current lender’s rates. Refinancing moves your home loan to a new lender at the same time as releasing equity, which allows you to access better rates but takes longer and involves refinancing costs. The right choice depends on whether your current rate is competitive and how urgently you need the funds.

Is using equity to invest in property risky?

All property investment carries risk, and using equity from your home to fund that investment means two assets are linked by debt. The key risks are interest rate rises on a larger debt portfolio, vacancy periods on the investment property reducing rental income, and capital value falls in a market downturn. These risks are manageable with the right cash flow buffer, a conservative LVR at the outset, and investment in areas with strong underlying demand fundamentals. They are not reasons to avoid the strategy but they need to be understood and planned for before proceeding.

Should I use cross-collateralisation to buy an investment property?

No in almost all cases. Cross-collateralisation ties both properties together as security, which restricts your ability to sell, refinance, or access equity in either property independently. The correct approach is to draw equity from your home as a separate loan split, use it as the deposit, and secure the investment loan against the investment property only. This keeps both loans structurally independent, maximises your tax efficiency, and gives you far greater flexibility as your portfolio grows.

Book a Free Investment Loan Assessment

Stanford Financial helps Brisbane and Queensland homeowners use their existing equity to grow a property portfolio. We model your usable equity, structure the loans correctly from day one, compare investment-specific lenders across the panel, and arrange pre-approval before you start shopping.

Call 0483 980 002 or book your free investment loan assessment online. We typically respond within one business day.

Related Calculators and Guides

LVR and Equity Calculator: calculate your usable equity, what it can fund, and how to reach your LVR target with extra repayments
Rental Yield Calculator: model gross and net yield and weekly cashflow on any investment property
Borrowing Power Calculator: estimate your combined borrowing capacity including investment loan serviceability
Repayments Calculator: compare interest only vs principal and interest repayments on your investment loan
Investment Loans: Stanford Financial’s full investment lending service
Refinance Savings Calculator: if you are refinancing to access equity, model the rate saving and break even point

Reviewed and Verified

All content published on this website has been reviewed and verified by Steven Beach, Lending Director at Stanford Financial. With over 20 years of experience in finance and lending, Steve ensures that every article, guide, and resource accurately reflects current lending practices, lender policies, and the real-world outcomes he sees working with Australian borrowers every day. His hands-on experience across home loans, investment lending, and specialist finance means the information you read here is grounded in genuine industry expertise – not just theory.