How to Use a Line of Credit for Property Investment in Australia


A line of credit (LOC) is a flexible loan product that can be a powerful tool for Australian property investors. Unlike a traditional term loan, an LOC allows you to draw funds up to an approved limit, repay, and redraw as needed. For property investors, this can mean quick access to capital for deposits, renovations, or bridging cash flow gaps. However, using a line of credit for investment requires careful planning and an understanding of equity requirements, tax implications, and risk management. In this comprehensive guide, we’ll walk you through everything you need to know about leveraging a line of credit for property investment in Australia.

What Is a Line of Credit and How Does It Work for Property Investment?

A line of credit is a revolving loan facility secured against residential or investment property. It functions similarly to a credit card but typically with lower interest rates and larger limits. For property investors, an LOC can be used to:

• Fund a deposit for a new investment property.
• Finance renovations or improvements to increase rental yield or capital value.
• Cover short-term cash flow needs, such as bridging gaps between settlement and rental income.
• Consolidate higher-interest debts to free up cash for investment.

When you set up a line of credit, the lender approves a maximum credit limit based on the equity in your property and your ability to service the debt. You only pay interest on the amount you draw down, not the entire limit. This flexibility makes LOCs attractive for investors who need intermittent access to funds.

Key Features of an Investment Property Line of Credit

• Secured against property: Most LOCs for investment are secured by residential real estate, which means the interest rate is lower than unsecured loans.
• Variable interest rate: Rates are typically variable, so your repayments can change with market conditions.
• Interest-only options: Many lenders offer interest-only repayments on the drawn amount, which can improve cash flow for investors.
• Redraw facility: You can repay and redraw funds within the approved limit without reapplying.
• No fixed repayment schedule: Minimum monthly repayments usually cover only the interest, but you can pay down the principal at any time.

How a Line of Credit Differs from a Traditional Home Loan

Feature	Line of Credit	Traditional Home Loan
Access to funds	Ongoing, up to limit	Lump sum at settlement
Repayments	Interest-only or flexible	Principal and interest (P&I) typically
Interest calculation	Daily on outstanding balance	Daily or monthly on outstanding balance
Purpose	Ongoing expenses, investments, renovations	Property purchase
Redraw	Yes, up to available limit	May be available, but not as flexible
Interest rate	Usually slightly higher than standard variable	Lower than LOC

Equity Requirements: How Much Can You Borrow?

To qualify for a line of credit for property investment, you need sufficient equity in an existing property. Equity is the difference between your property’s market value and the outstanding loan balance. Lenders typically allow you to borrow up to 80% of the property’s value minus any existing debt, though some may go higher with Lenders Mortgage Insurance (LMI).

Calculating Usable Equity

Let’s say you own a property worth $800,000 with a mortgage of $400,000. Your equity is $400,000. However, lenders will only allow you to access a portion of this equity as a line of credit. At an 80% loan-to-value ratio (LVR):

• Maximum borrowing: 80% x $800,000 = $640,000
• Existing loan: $400,000
• Available equity: $640,000 - $400,000 = $240,000

This $240,000 could be set up as a line of credit for investment purposes. Keep in mind that lenders will also assess your serviceability – your ability to repay the loan based on your income, expenses, and other debts. As of 2025, the Australian Prudential Regulation Authority (APRA) requires lenders to apply a 3% serviceability buffer above the loan’s interest rate, which can impact how much you can borrow.

Using Equity from an Investment Property

If you already own an investment property, you can release equity from it to fund further investments. This is a common strategy known as “equity recycling.” However, be aware that using equity from an investment property for another investment may have different tax implications than using equity from your owner-occupied home (see Tax Implications section).

Tax Implications of Using a Line of Credit for Investment

One of the most critical aspects of using a line of credit for property investment is understanding the tax deductibility of interest. The Australian Taxation Office (ATO) allows you to claim a deduction for interest expenses if the borrowed funds are used for income-producing purposes, such as purchasing an investment property or making improvements to one.

The Purpose Test

The ATO applies a “purpose test” to determine deductibility. This means the deductibility of interest depends on what the borrowed money is used for, not the type of loan or the security. For example:

• If you draw from your LOC to fund a deposit on a new investment property, the interest is tax-deductible.
• If you use the LOC to pay for private expenses (e.g., a holiday), the interest is not deductible.

Mixed-Use Loans and Contamination

A common pitfall is using a single line of credit for both investment and personal purposes. This is known as a “mixed-use” or “contaminated” loan. If you deposit personal funds into the LOC (e.g., your salary), it may be considered a repayment of the investment debt, and subsequent redraws for personal use can reduce the deductible portion. To avoid this, many investors set up separate LOC facilities: one strictly for investment purposes and another for personal use. Alternatively, you can use a split loan structure where the investment portion is clearly delineated.

Interest Capitalisation

Some investors use a line of credit to capitalise interest – that is, they use the LOC to pay the interest on the investment loan itself. While this can improve cash flow, the ATO has specific views on this strategy. As of 2025, the ATO generally accepts that capitalised interest is deductible if the original borrowing was for income-producing purposes and the capitalisation does not alter the character of the interest. However, this is a complex area, and you should seek professional tax advice.

Capital Gains Tax (CGT) Considerations

When you eventually sell an investment property, you may be liable for CGT. The cost base of the property can include certain expenses, such as interest on borrowed funds used to acquire or improve the property. Therefore, keeping clear records of how your LOC funds were used is essential for calculating your CGT liability accurately.

Strategies for Using a Line of Credit in Property Investment

A line of credit can be used in several ways to build a property portfolio. Here are some common strategies:

1. Funding Deposits for New Purchases

Instead of saving for a cash deposit, you can use an LOC to access equity from an existing property. This allows you to act quickly when you find a suitable investment property. The interest on the LOC used for the deposit is tax-deductible, provided the new property is income-producing.

2. Financing Renovations

Renovating an investment property can increase its rental income and capital value. An LOC is ideal for funding renovations because you can draw funds as needed to pay contractors and suppliers. The interest on these draws is generally deductible if the renovations are for the investment property.

3. Bridging Finance

If you’re buying a new property before selling an existing one, a line of credit can act as bridging finance. You can use the LOC to cover the deposit and costs on the new property, then repay it when the old property sells. This strategy can be cost-effective compared to a traditional bridging loan, but you need to manage the risk of holding two properties simultaneously.

4. Debt Recycling

Debt recycling is a strategy to convert non-deductible debt (like a home loan) into deductible investment debt. For example, you might use an LOC to pay down your owner-occupied home loan, then redraw from the LOC to invest in income-producing assets. The interest on the redrawn amount becomes tax-deductible. This strategy requires careful planning and should be done with professional advice.

5. Cash Flow Management

Investment properties often have unexpected expenses, such as major repairs or vacancy periods. An LOC can serve as a buffer, allowing you to cover these costs without disrupting your cash flow. However, it’s important not to rely on the LOC as a substitute for a healthy cash reserve.

Risk Management: Avoiding Common Pitfalls

While a line of credit offers flexibility, it also carries risks. Here’s how to manage them:

1. Overleveraging

Because an LOC allows you to borrow up to a limit, it’s easy to accumulate more debt than you can comfortably service. Always borrow within your means and consider a buffer for interest rate rises. As of 2025, with variable rates around 6-7% for investment loans, ensure your rental income and other cash flows can cover repayments even if rates increase by 2-3%.

2. Interest Rate Fluctuations

LOC interest rates are typically variable, so your repayments can rise unexpectedly. Use stress-testing to assess your capacity to repay at higher rates. Consider fixing a portion of your debt if you’re concerned about rate rises, though fixed-rate LOCs are less common.

3. Tax Contamination

Mixing personal and investment use in one LOC can lead to tax complications. The ATO may disallow deductions if you cannot clearly trace the use of funds. Keep separate accounts and maintain meticulous records.

4. Discipline in Repayments

The flexibility of an LOC can be a double-edged sword. Without a structured repayment plan, you might only pay interest indefinitely, leaving the principal untouched. Set a goal to reduce the principal over time, especially if the property’s value isn’t appreciating as expected.

5. Security Risk

Since an LOC is secured against your property, defaulting could lead to the lender repossessing your home or investment property. Ensure you have adequate insurance and a contingency plan for financial setbacks.

6. Regulatory Changes

Lending regulations can change. For example, APRA may adjust serviceability buffers or debt-to-income limits. Stay informed about regulatory developments that could affect your borrowing capacity.

How to Apply for a Line of Credit for Property Investment

Applying for an LOC involves similar steps to a home loan application. Here’s a step-by-step guide:

1. Assess your equity and borrowing power: Use online calculators or consult a mortgage broker to determine how much equity you can release and your serviceability.
2. Choose the right lender and product: Compare LOC offerings from major banks and specialist lenders. Look at interest rates, fees, and features like offset accounts or fixed-rate options.
3. Prepare documentation: You’ll need proof of income (payslips, tax returns), identification, property valuations, and details of existing debts.
4. Submit your application: Your lender will assess your application, order a valuation, and review your credit history.
5. Settlement and access: Once approved, the LOC is set up, and you can access funds via online banking, cheque, or a linked transaction account.

Eligibility Criteria (as of 2025)

• Credit score: Most lenders require a good credit score (typically 650+).
• Income: Stable employment or verifiable self-employment income.
• LVR: Maximum LVR is usually 80% without LMI, but some lenders allow up to 90% with LMI.
• Serviceability: You must demonstrate that you can repay the loan at an assessed rate (currently around 9-10% for serviceability calculations).

Comparison of Line of Credit Lenders for Investors (2025)

Lender	Product Name	Interest Rate (p.a.)	Max LVR	Features
Commonwealth Bank	Viridian Line of Credit	6.85% variable	80%	Offset account available, interest-only option
Westpac	Equity Access Loan	6.99% variable	80%	Redraw facility, split loan option
NAB	Homeplus Line of Credit	6.79% variable	80%	No ongoing fees, linked transaction account
ANZ	Equity Manager	6.89% variable	80%	Interest-only repayments, flexible redraw
Macquarie Bank	Line of Credit	6.75% variable	75%	Competitive rate, digital application

Rates are indicative and subject to change. Comparison rates may be higher. Always check current rates and terms with the lender.

FAQ

Can I use a line of credit on my owner-occupied home to buy an investment property?

Yes, you can use an LOC secured by your owner-occupied home to fund an investment property purchase. The interest on the portion used for the investment is tax-deductible, provided the new property is income-producing. However, be careful not to mix personal and investment use in the same LOC to avoid tax contamination.

What happens if I can’t make the minimum repayments on my line of credit?

If you miss repayments, the lender may charge late fees and report the delinquency to credit bureaus, damaging your credit score. In severe cases, the lender could default on the loan and repossess the secured property. It’s crucial to contact your lender early if you’re experiencing financial hardship; they may offer a temporary repayment reduction or other assistance.

Is the interest on a line of credit always tax-deductible for investment properties?

Not always. The deductibility depends on the use of the borrowed funds. If the funds are used for income-producing purposes (e.g., buying an investment property, renovating one, or covering investment-related expenses), the interest is generally deductible. If used for personal expenses, it is not. Keep clear records and consider separate accounts for investment borrowing.

How does a line of credit affect my credit score?

An LOC appears as a revolving credit facility on your credit report. High utilisation (drawing close to the limit) can negatively impact your credit score, as it may indicate financial stress. Making timely repayments and keeping the balance low relative to the limit can help maintain a good score.

Can I fix the interest rate on a line of credit?

Most lines of credit have variable interest rates. Fixed-rate options are rare because the product is designed for flexibility. Some lenders allow you to split your LOC into fixed and variable portions, but the fixed portion typically loses the redraw flexibility.

References

1. Australian Taxation Office, “Rental properties – claiming interest on a line of credit,” ATO, 2025. Link
2. Australian Prudential Regulation Authority, “APRA finalises macroprudential policy framework,” APRA, 2025. Link
3. Commonwealth Bank, “Viridian Line of Credit,” CommBank, 2025. Link
4. Westpac, “Equity Access Loan,” Westpac, 2025. Link
5. NAB, “Homeplus Line of Credit,” NAB, 2025. Link

Disclaimer: This article is for informational purposes only and does not constitute financial or tax advice. You should consult a qualified professional before making any investment decisions.