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How to Use Equity in Your Home to Buy an Investment Property in Australia

How to Use Equity in Your Home to Buy an Investment Property in Australia

![Australian home with equity growth concept]( Photo by Artful Homes on Pexels )

In Australia’s dynamic property market, leveraging equity in your existing home is a popular strategy to build wealth through investment properties. As of 2025, with property values in many capital cities continuing to appreciate, homeowners are sitting on substantial equity that can be used to fund deposits, reduce loan costs, and accelerate portfolio growth. This step-by-step guide will walk you through everything you need to know about using home equity to buy an investment property—covering loan options, tax implications, common pitfalls, and expert insights tailored for Australian homeowners.

What Is Home Equity and How Does It Work?

Home equity is the difference between your property’s current market value and the outstanding balance on your mortgage. For example, if your home is worth $900,000 and you owe $400,000, your equity is $500,000. However, lenders will not allow you to access all of this equity. Typically, you can borrow up to 80% of your home’s value without paying Lenders Mortgage Insurance (LMI), though some lenders may go higher with LMI. This accessible equity can be used as a deposit or security for an investment property loan.

Usable equity is calculated as 80% of the property value minus the remaining loan. Using the example above: 80% of $900,000 = $720,000, minus $400,000 loan = $320,000 usable equity. This equity can be released through a loan increase, refinance, or a line of credit, allowing you to fund an investment purchase without needing cash savings.

Step-by-Step Guide to Using Equity for Investment

Step 1: Assess Your Current Financial Position

Before approaching lenders, conduct a thorough review of your finances. Start by obtaining a professional valuation of your home—banks will require this anyway, but an early estimate helps set realistic expectations. Check your credit score through agencies like Equifax or illion, and calculate your debt-to-income ratio. Lenders will stress-test your ability to service additional debt, often at an interest rate 3% higher than the current rate, per APRA guidelines. Ensure you have a stable income and a buffer for rate rises or rental vacancies.

Step 2: Understand Loan Structuring Options

When using equity, how you structure the loan is critical for tax efficiency and risk management. The three main options are:

  • Loan Increase/Top-Up: You increase your existing home loan by the amount of usable equity, and the extra funds are placed in a separate account or redraw facility. This is simple but can mix personal and investment debt, complicating tax deductions.
  • Line of Credit (LOC): A revolving credit facility secured against your home, allowing you to draw funds as needed. Interest is only charged on the amount used, but rates are often higher than standard loans.
  • Cross-Collateralisation: The lender uses both your existing home and the new investment property as security for the total loan. While it can help borrow more, it ties the properties together, reducing flexibility if you want to sell one later. Many experts advise against this structure due to the risks.

Best Practice: Separate Loan Split To keep investment debt clearly identifiable for tax purposes, set up a separate loan split or a new loan account secured by your home equity. This ensures interest on the portion used for the investment property can be claimed as a tax deduction, while your original home loan interest (non-deductible) remains separate. Avoid redrawing from a mixed-purpose loan, as the ATO may apportion interest and create accounting headaches.

Step 3: Calculate Your Borrowing Capacity and Serviceability

Lenders assess your ability to repay based on your income, existing debts, living expenses, and the proposed rental income from the investment property. They typically use only 75-80% of the expected rental income to account for vacancies and expenses. Use online borrowing power calculators from major banks like CommBank or NAB as a starting point, but consult a mortgage broker for a realistic assessment. As of 2025, many lenders have tightened serviceability buffers, so having a strong cash flow is essential.

Step 4: Choose the Right Investment Loan Product

Investment property loans often have slightly higher interest rates and fees than owner-occupier loans. Compare features like offset accounts, redraw facilities, and fixed vs. variable rates. Interest-only loans are popular for investors as they maximise tax deductions and improve cash flow, but they revert to principal and interest after the interest-only period (typically 5 years). Ensure you understand the long-term cost implications. Use comparison sites like Moneysmart to review current rates and features.

Step 5: Engage Professionals and Apply

Work with a reputable mortgage broker who specialises in investment lending. They can navigate lender policies and find the most suitable product. You’ll also need a conveyancer or solicitor for the purchase, and an accountant to advise on tax structuring. Once you’ve chosen a loan, submit your application with all required documents: proof of income, identification, recent tax returns, and details of the investment property. The lender will order a valuation and assess the application. If approved, the equity release and property settlement will be coordinated.

Step 6: Settlement and Post-Purchase Management

After settlement, ensure your loan structure remains tax-effective. Keep meticulous records of all expenses related to the investment property, as these can be claimed as deductions. Consider setting up a depreciation schedule to maximise tax benefits. Regularly review your loan and property performance—if interest rates drop or your equity grows further, you may be able to refinance to a better deal or access more equity for future investments.

Tax Implications of Using Home Equity

Using equity from your home to invest has significant tax implications. The key principle is that the purpose of the borrowed funds determines deductibility. If you borrow against your home to buy an income-producing asset, the interest on that borrowed amount is generally tax-deductible. However, if you use the equity for personal expenses (like a car or holiday), the interest is not deductible.

Capital Gains Tax (CGT): When you eventually sell the investment property, you’ll be liable for CGT on the profit. If you hold the property for more than 12 months, you may be eligible for a 50% CGT discount as an individual taxpayer. The cost base of the property includes purchase costs, stamp duty, and certain improvements, which can reduce the gain.

Negative Gearing: Many investors use equity to purchase a property that is negatively geared—where the rental income is less than the interest and expenses. This loss can be offset against your other income (e.g., salary), reducing your taxable income. However, negative gearing carries risk if property values stagnate or interest rates rise. The Australian Taxation Office (ATO) provides detailed guidance on rental property deductions.

Depreciation: Investment properties can generate substantial non-cash deductions through depreciation of the building structure and fixtures. A quantity surveyor can prepare a tax depreciation schedule, which can boost your after-tax cash flow.

Avoiding Tax Pitfalls:

  • Do not mix personal and investment borrowings in one account. The ATO may disallow deductions if the loan purpose is unclear.
  • If you redraw from a loan that has been partially paid down, the redrawn amount’s deductibility depends on its use. Keep a separate investment loan split.
  • Ensure your loan documentation clearly states the purpose of the equity release.

Common Pitfalls and How to Avoid Them

A conceptual still life image of stacked coins in front of a porcelain house, symbolizing savings and investment.

1. Over-Leveraging

Borrowing too much against your home can put both properties at risk if the market dips or you face financial hardship. Always maintain a buffer—ideally, don’t borrow more than 80% of your home’s value, and keep an emergency fund covering 6-12 months of loan repayments.

2. Cross-Collateralisation

As mentioned, linking your home and investment property as security can limit your flexibility. If you want to sell one property, the lender may require a revaluation and potentially a payout of the other loan. It’s often better to use a separate loan split secured only by your home equity.

3. Ignoring Cash Flow Realities

Investment properties come with costs beyond the mortgage: council rates, insurance, maintenance, property management fees, and potential vacancies. Ensure the rental income—even if it covers the interest—leaves enough to cover these outgoings. Use a cash flow analysis tool or consult with a property advisor.

4. Not Getting Professional Tax Advice

Tax laws around investment properties are complex and change frequently. A mistake in structuring could lead to denied deductions or unexpected CGT bills. Engage a qualified tax accountant who specialises in property investment before you purchase.

5. Focusing Only on Tax Benefits

While negative gearing and depreciation can reduce tax, they shouldn’t be the sole reason to invest. The primary goal should be long-term capital growth and sustainable income. A property that consistently loses money is a drain on your finances, even with tax offsets.

Loan Options for Equity Release in 2025

Lenders offer various products to access equity. The table below compares common options available in Australia as of early 2025:

Loan TypeInterest Rate (approx.)FeaturesBest For
Standard Variable Rate Loan6.50% - 7.00% p.a.Flexible repayments, offset account, redrawInvestors wanting flexibility and potential rate drops
Fixed Rate Loan (3-5 years)5.80% - 6.30% p.a.Certainty of repayments, limited extra repaymentsThose who want budget certainty in a rising rate environment
Line of Credit7.00% - 7.50% p.a.Draw funds as needed, interest-only availableRenovators or serial investors needing ongoing access
Interest-Only Investment Loan6.70% - 7.20% p.a.Lower initial repayments, maximises tax deductionsInvestors focused on cash flow and negative gearing

Rates are indicative and based on major bank offerings as of Q1 2025. Actual rates depend on LVR, credit score, and loan amount. Always compare using government resources like Moneysmart’s mortgage calculator.

Case Study: Sarah and Tom’s Investment Journey

Sarah and Tom own a home in Brisbane valued at $1.1 million with a $400,000 mortgage. They want to buy a $700,000 investment property in a growth suburb. Their usable equity is $480,000 (80% of $1.1M = $880K, minus $400K loan). They decide to set up a separate loan split of $140,000 against their home (20% deposit plus costs) and borrow the remaining $560,000 as an investment loan secured by the new property. They choose an interest-only loan for the investment portion to maximise cash flow. With rental income of $650 per week and interest costs of $750 per week, the property is slightly negatively geared, reducing their taxable income. They engage a quantity surveyor for a depreciation schedule, claiming an additional $8,000 in deductions in the first year. By keeping loans separate and documenting everything, their accountant confirms full deductibility of investment loan interest.

Frequently Asked Questions (FAQ)

1. Can I use equity if I still have a mortgage on my home?

Yes, most Australian homeowners use equity while still paying off their home loan. The key is having sufficient equity built up (usually at least 20% of the property’s value) and the income to service the additional debt. Lenders will assess your overall financial position, including your existing mortgage repayments.

2. Is it better to use a line of credit or a term loan for equity release?

It depends on your strategy. A term loan (separate split) is generally better for a one-off investment purchase because it offers lower interest rates and clear separation for tax purposes. A line of credit is more suitable if you plan multiple investments or renovations over time, as you can draw and repay funds flexibly. However, lines of credit often have higher rates and may tempt overspending.

3. What are the risks of cross-collateralisation?

Cross-collateralisation ties your home and investment property together, meaning the lender has control over both assets. If you default on one loan, the lender can force the sale of either property. It also makes it harder to sell one property without refinancing the entire portfolio. Many financial advisors recommend avoiding it and instead using standalone loans for each property.

4. How does the ATO treat interest when I use equity from my home for an investment property?

The ATO’s “purpose test” applies: if the borrowed money is used to produce assessable income (like rent), the interest is deductible. You must be able to trace the funds directly from the loan to the investment purchase. That’s why a separate loan account is crucial. If you redraw from a mixed loan, you may need to apportion interest, and the ATO could challenge your deductions. Keep clear records and consult a tax professional.

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

Yes, that’s the primary advantage of using equity. If you have enough usable equity, you can fund the entire deposit and purchase costs (like stamp duty) without using savings. This is known as 100% lending against the combined security, though it increases your overall debt and risk. Some lenders may require you to contribute a small amount from savings to demonstrate genuine savings, but many will accept equity alone.

References

Disclaimer: This article provides general information only and does not constitute financial or tax advice. You should consult a qualified professional before making investment decisions.