Written by

Steven Lee

Mortgage Director, ODIN Mortgage & Tax

10+ years in Australian banking and mortgage lending

Last reviewed

Updated on: October 8, 2026 View profile →

Using Equity to Buy Investment Property in Australia

For many Aussie homeowners, their property isn’t just a place to live—it’s their biggest financial asset. As market values climb, you may well be sitting on tens or hundreds of thousands in untapped equity without even realising it.

In fact, residential dwellings in Australia are now valued at AUD $11.564 trillion as of June 2025, with the mean dwelling price hitting AUD $1,016,700. Meanwhile, residential property makes up 64% of household wealth, placing equity in your home at the centre of your net-worth strategy.

Yet many aspiring investors watch opportunities slip by as they save up hefty cash deposits, failing to realise they already have access to capital. The real unlock comes from leveraging that equity to expand.

This guide shows you a smarter strategy: tapping into your home equity to buy an investment property—one of the most effective ways to build a robust portfolio.

You’ll get a full roadmap: what home equity really means, how much you can realistically draw, the finance process step-by-step, what lenders look for, and the key risks and tax implications you cannot ignore before you jump in.

What Is Home Equity?

Home equity is the portion of your property that you truly own. It’s the foundation of this investment strategy.

It represents the difference between your property’s current market value and what you still owe on your home loan.

The formula is simple: Total Equity = Property Market Value − Outstanding Loan Balance.

For example:

Home value = $800,000
Mortgage remaining = $300,000
Total equity = $800,000 – $300,000 = $500,000

This equity increases as you pay down your loan or as your property value appreciates.

Your total equity isn’t the amount a bank will let you borrow. For any investment plan, the critical figure is your usable equity, sometimes called accessible equity.

Lenders need to protect themselves from risk. They typically cap the total loan against your property at 80% of its value, known as the Loan-to-Value Ratio (LVR). Your usable equity is the amount available within this 80% LVR threshold.

The standard formula is: Usable Equity = (Property Value×0.80) − Outstanding Loan Balance.

Using the same example, usable equity equals ($800,000 x 0.80) – $300,000 = $340,000.

In this scenario, your usable equity is $340,000. This is the realistic amount you can potentially access for your investment. It’s possible to borrow above an 80% LVR, but this usually requires paying Lenders Mortgage Insurance (LMI).

Your equity isn’t static. You can actively grow it to increase your investment potential.

There are two primary methods you can use to build equity in your home: pay down your debt faster or increase your property’s value.

Pay Down Your Debt Faster

The most direct way to build equity is to reduce your mortgage balance. You can achieve this by making consistent loan repayments.

Making extra repayments or occasional lump-sum payments also directly increases your equity. Linking a 100% offset account to your loan can also speed up the process. It reduces the interest you pay, meaning more of your repayment clears the principal.

Increase Your Property Value

Your equity also grows if your property becomes more valuable. This can happen passively as the market rises, which is known as capital growth.

Alternatively, you can take a more active role. Strategic renovations and home improvements can increase your home’s market value.

However, it’s vital to research carefully to avoid overcapitalisation. It’s when the renovation cost is more than the value it adds.

Both approaches can significantly improve your financial position.

How to Buy an Investment Property with Equity

Using your equity to invest is a structured process that can turn your home’s potential into a tangible asset.

This blueprint offers a clear and actionable roadmap, guiding you from the initial calculations all the way to the final purchase and beyond.

By following these steps, you can confidently navigate how to use equity to buy investment property.

1. Assess Your Financial Position & Calculate Usable Equity

The first step is to establish a clear financial baseline. Start by getting an estimate of your home’s current market value.

You can use online property reports or ask a real estate agent for an appraisal.

Keep in mind that a lender will always conduct its own formal valuation, which might be more conservative.

With this value, use the formula from the previous section to calculate your precise usable equity.

2. Set Your Budget & Understand Your Borrowing Power

Your usable equity is not the same as your total borrowing power.

While your equity forms the deposit, lenders will conduct a separate serviceability assessment to determine the total loan amount they will offer.

As a preliminary guide, investors often use the “Rule of Four”. This suggests your maximum purchase price is about four times your usable equity.

For example, $100,000 in usable equity could translate to a $400,000 property purchase.

This works because it allocates 20% for the deposit and leaves a 5% buffer for purchasing costs like stamp duty and legal fees.

3. Choose Your Financing Structure

Accessing your equity is not a one-size-fits-all process. The financing structure you choose has significant long-term implications for risk and tax effectiveness.

Home Loan Top-Up: This involves applying to increase the limit on your existing home loan. While simple, it can create a mixed-purpose loan, which may complicate your tax deductions.

Refinancing: With a cash out refinance, you take out a new, larger loan to pay off your existing one. This releases the equity portion as a lump sum of cash for you to use. It also provides an opportunity to find a more competitive deal with a different lender.

Separate or Supplementary Loan: This involves setting up a new, distinct loan that is secured against your home’s equity. This is often the preferred method for investors because it keeps the investment debt clearly separate from your private home loan, which simplifies tax record-keeping. This is a clean way to use equity to buy investment property.

Home Equity Line of Credit (HELOC): A HELOC provides a flexible credit facility, much like a credit card. You can draw funds as needed up to an approved limit and only pay interest on what you use. This flexibility demands strong financial discipline to manage effectively.

👉 Learn more: Cash Out Refinance: Access Your Home Equity

4. Secure Loan Pre-Approval

It’s highly advisable to get pre-approval from a lender before you start your property search. This gives you a firm budget to work with.

Pre-approval gives you confidence when making offers. It also shows sellers and real estate agents that you are a serious and credible buyer.

5. Find the Right Investment Property

Your goal is not just to buy any property. It’s to acquire a high-performing investment. This requires thorough research and due diligence.

Key research points include:

Market Analysis: Investigate local market trends, capital growth history, and future development plans.
Rental Demand: Assess vacancy rates and the strength of rental demand to ensure a consistent income stream.
Property Condition: Check the property’s age and condition to estimate future maintenance costs.
Tenant Appeal: Consider what features are most attractive to renters in that specific market.

👉 Also see: How to Build a Successful Investment Portfolio in Australia

6. Finalise the Purchase

Once you have pre-approved finance and have found a suitable property, you can proceed with the purchase.

This involves making an offer and negotiating the price. You’ll also need to conduct professional building and pest inspections.

Finally, you’ll engage a solicitor or conveyancer to handle the legal contracts and settlement process.

7. Manage Your New Portfolio

The process does not end at settlement. You now have a new asset to manage.

This includes finding tenants, addressing maintenance, and complying with tenancy laws.

You also have a larger loan portfolio to oversee, requiring diligent financial management.

👉 Check out: Mortgage Repayment Guide for Australia

AU Expats—Struggling with Australian Policies from Overseas?

What Australian Banks Look For

Having enough usable equity is necessary, but it does not guarantee loan approval.

Lenders will put your application through a rigorous assessment process. This is built on three key pillars: LVR, potential LMI, and your serviceability.

LVR: The Main Risk Metric

The LVR is the primary metric lenders use to assess loan risk. It measures your loan amount as a percentage of the property’s value.

The formula is: LVR (%) = (Property Value / Loan Amount) × 100.

The industry tipping point for LVR is 80%. An LVR at or below 80% is considered lower risk and can result in more competitive interest rates.

An LVR above 80% signals higher risk and triggers extra requirements.

LMI: The Cost of a High LVR

If your LVR exceeds 80%, you’ll almost certainly need to pay for Lenders Mortgage Insurance (LMI).

The cost of the LMI premium is based on the LVR and the loan size. A higher LVR means a higher premium.

For investors, the ATO generally allows the LMI premium on an investment loan to be claimed as a tax deduction over five years.

This makes using equity to buy investment property slightly more affordable from a tax perspective.

The Serviceability Test

The final and most comprehensive hurdle is the serviceability assessment. This is the lender’s deep dive into your finances to ensure you can repay your debt.

Key factors they assess include:

Income: Lenders consider all your verifiable income sources. They will typically “shade” or discount potential rental income by 20-30% to account for vacancies and other costs.
Expenses: Lenders will estimate your living expenses, often using a benchmark like the Household Expenditure Measure (HEM).
Existing Debts: Lenders assess the total limit on your credit cards, not just the balance. It is often wise to reduce high credit limits or cancel unused cards before applying.
Interest Rate Buffer: Lenders assess your ability to repay the loan at a higher interest rate. They apply a “buffer” that is typically 2.5% to 3% higher than the actual rate to ensure you can handle future rate rises.

👉 Also see: Refinance a Home Equity Loan in Australia

The Pros and Cons of Using Home Equity

Leveraging your home equity is a powerful strategy, but you need a balanced view of its pros and cons.

The following table provides a clear comparison of the key trade-offs involved when deciding on using home equity to buy investment property.

Pros of Using Home Equity for Investment Property	Cons of Using Home Equity for Investment Property
No Need for Cash Savings: You can leverage your existing equity, removing the need to save a large cash deposit and allowing you to act on market opportunities faster.	Increased Debt: You are inherently increasing your total debt, which can be a significant risk if property values fall or your income changes.
Potential Tax Deductions: The interest on a loan for an investment property may be tax-deductible. You might also claim depreciation on the property, reducing your taxable income.	Market Risk: A drop in property values could leave you in a negative equity situation, where your debt exceeds the value of your properties.
Wealth Building: You have the potential to benefit from capital growth on multiple properties over time. Rental income can also provide a passive income stream.	Financial Strain: Managing multiple properties can lead to cash flow problems from unexpected repairs or vacancies. Variable interest rates can also increase repayments.
Increased Borrowing Power: Using equity can sometimes enable you to borrow more than you could with just your savings, giving you access to higher-value properties.	Tax Implications: If you sell the investment property for a profit, you may be subject to Capital Gains Tax (CGT), reducing your net return.
Lower Interest Rates: Funds accessed via equity are typically at home loan rates, which are often much lower than personal loans.	Complexity & Risk to Home: Defaulting on the investment loan could ultimately put your primary residence at risk of foreclosure.

👉 Check out: Types of Equity Loans in Australia

The Risks and Downsides of Using Equity to Buy Investment Property

While the rewards of using equity to buy investment property are significant, this strategy magnifies your financial exposure.

Understanding and mitigating the specific risks involved is non-negotiable.

Financial and Market Risks

The primary financial risk is the increased debt burden. You are taking on a second mortgage, which increases your sensitivity to interest rate rises.

There’s risk of over-leveraging. A fall in property values could leave you in a negative equity position—owing more than your properties are worth.

Mitigation strategies:

Do not use all your usable equity. Keep a cash reserve for unexpected expenses and vacant periods.
Calculate if you can service all debts if interest rates were 3% higher.
Property investment is a long-term strategy of 10 years or more, allowing you to ride out market fluctuations.

Property-Specific Risks

The investment property itself carries risks. Vacancy risk is when you have no tenant and no rental income, but the costs continue.

Bad tenant risk includes those who fail to pay rent or damage the property.

Finally, all properties require unexpected maintenance, which can result in large costs.

Mitigation strategies:

Buy in areas with consistently high rental demand and low vacancy rates.

Engage a reputable property manager for tenant screening, rent collection, and maintenance.
Take out a comprehensive landlord insurance policy to cover lost rent and damage.

The Cross-Collateralisation Trap

Cross-collateralisation is a lending structure where the bank uses both your home and the investment property as security for the entire debt.

While convenient, it ties the fate of your assets together and reduces your financial flexibility.

If you want to sell one property, the bank can revalue your entire portfolio and may prevent you from accessing your capital. This is a key reason why understanding how to buy an investment property with equity correctly is so important.

Mitigation strategy: Insist on standalone loan structures.

Use the equity from your home as a cash deposit for a completely separate loan secured only by the investment property. This creates a “firewall” between your family home and your investment.

👉 Also see: Property Investment Strategies for Australian Expats and Foreign Buyers

Understanding Australian Tax Rules

Understanding the tax landscape is a core component of a successful investment strategy.

The rules set by the Australian Taxation Office (ATO) can provide significant benefits to disciplined investors who maintain meticulous records.

The Golden Rule: Interest Deductibility

The cornerstone of property investment tax law is the “purpose test”.

The ATO states that the deductibility of loan interest is determined by the purpose for which the funds were used, not the asset used as security.

If you take out a loan and use the funds to buy an income-producing asset like a rental property, the interest is tax-deductible. If you use it for a private purpose, like a car, the interest is not deductible.

This is why keeping investment debt in a separate loan account is so important.

Capital Gains Tax (CGT) on Sale

When you sell your investment property, you will likely trigger a Capital Gains Tax (CGT) event.

The net capital gain is added to your assessable income for that financial year and taxed at your marginal rate.

The capital gain is calculated as: Capital Proceeds − Cost Base = Capital Gain.

The Cost Base includes the original purchase price plus other capital costs like stamp duty and legal fees.

A significant concession is the 50% CGT discount. From 1 July 2027, new legislation replaces the 50% CGT discount with cost-base indexation; residents can still use the discount for gains accrued before that date, and foreign residents generally cannot access it. If you are an Australian resident and have owned the property for more than 12 months, you can reduce your taxable capital gain by 50%.

👉 Learn more: A Complete Guide to Capital Gains Tax in Australia for Aussie Expats Living Overseas

Other Key Deductions

In addition to loan interest, you can typically claim deductions for a range of other expenses.

These include council rates, water charges, landlord insurance, property management fees, and costs for repairs and maintenance.

👉 Learn more: Top Investment Property Tax Deductions for Australian Investors

👉 We also help Australian citizens living abroad manage their taxes effortlessly from overseas.

FAQs on Using Equity to Buy Investment Property in Australia

Here are some frequently asked questions about using equity to buy investment property in Australia.

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

Focus on your usable equity, which is typically 80% of your property’s value minus your current loan balance.

To avoid Lenders Mortgage Insurance (LMI), you’ll need enough usable equity to cover a 20% deposit on the investment property plus costs like stamp duty.

Can I use equity to cover the entire deposit and purchase costs?

Yes, if you have enough usable equity. A common guideline is the “Rule of Four”.

The rule suggests your maximum purchase price can be about 4x your usable equity, as this implicitly covers a 20% deposit and a 5% buffer for costs.

Is the interest on my equity loan tax-deductible?

Yes, as long as the funds were used for an income-producing purpose, like buying the rental property.

The ATO’s “purpose test” is what matters, so structuring the loan correctly as a separate account is essential for maximising deductions.

What happens if the value of my home or investment property falls?

If property values fall, your equity is reduced. A significant drop could lead to negative equity, where your loans are worth more than your properties.

This is a key risk of leveraging, as it can make it very difficult to sell or refinance.

Is it better to refinance or get a separate loan?

For tax purposes, a separate loan is often considered the cleanest and best structure.

It creates a distinct debt clearly tied to the investment, simplifying record-keeping for the ATO.

How does cross-collateralisation work and what are the risks?

Cross-collateralisation is when a lender links your home and investment property together as security for the total loan.

You can’t sell one property without the bank reassessing your entire financial position. So, problems in one property can trap the equity in another.

Utilising home equity to purchase an investment property significantly increases your total debt and exposes your family home to a new layer of risk.

Success demands a strong financial position, a significant cash buffer, a long-term horizon, and a high tolerance for risk. Careful planning, meticulous research, and disciplined management are essential.

The definitive next step is to seek personalised advice from a qualified mortgage broker and a registered financial advisor or tax agent to ensure this decision is right for your unique circumstances.

👉 Also see: Refinance a Home Equity Loan in Australia

AU Expats—Ready to Invest but Unsure of the Next Step?

Key Takeaways

Usable equity is the portion of your home’s value you can borrow against, typically capped at 80% LVR. ⬆️
The process involves calculating equity, choosing a loan structure, securing pre-approval, and then finding your investment property. ⬆️
Banks assess your loan application based on your Loan-to-Value Ratio (LVR), potential LMI costs, and your financial serviceability. ⬆️
You can invest without needing a large cash deposit, but this strategy significantly increases your total debt and market risk. ⬆️
Major risks include increased personal debt, market volatility, property vacancies, and the trap of cross-collateralising your assets. ⬆️
Loan interest is tax-deductible based on the loan’s purpose, while selling the property for a profit triggers Capital Gains Tax. ⬆️

Using Equity to Buy Investment Property in Australia