Using a Line of Credit for Debt Recycling

A line of credit gives you access to home equity on demand, which means you can draw down investment funds and start converting non-deductible debt without waiting for lender approval each time.

The structure works like a revolving facility attached to your home loan. As you pay down your mortgage, equity becomes available in the line of credit. You draw that equity, invest it in income-producing assets, and the interest on the drawn amount becomes tax deductible because it's now funding an investment. The mortgage debt shrinks, the investment debt grows, and your after-tax position improves if the investment income exceeds the cost of servicing the loan. For Brisbane homeowners with strong equity positions and consistent income, this structure can accelerate the shift from non-deductible to deductible debt without needing multiple refinances.

But a line of credit is not the only way to recycle debt, and it's not always the most suitable. The interest rate is usually higher than a standard variable home loan, and some lenders apply annual fees or review conditions that make the facility less flexible than it appears. Understanding when a line of credit fits and when a split loan strategy works better is part of structuring the approach correctly from the start.

How a Line of Credit Supports Ongoing Debt Recycling

A line of credit lets you access equity progressively without reapplying for finance each time you want to invest. Once the facility is approved, you can draw funds as your equity grows, provided you stay within the approved limit. Each draw is recorded separately, and the interest charged on investment-related draws becomes tax deductible if you meet ATO requirements. The portion of the facility used for investment purposes must remain clearly separated from any personal use, which means keeping detailed records of every drawdown and its purpose.

Consider a Brisbane couple with a $600,000 home loan and a property valued at $900,000. They set up a $150,000 line of credit against their home. Over the first 12 months, they draw $50,000 to purchase shares in a managed fund that pays quarterly distributions. The interest on that $50,000 is deductible because the funds were used to generate assessable income. As they continue paying down their mortgage, more equity becomes available in the line of credit, and they can draw again without refinancing. The structure allows them to recycle debt in stages rather than committing a large lump sum upfront.

The facility works well when you have a clear debt recycling strategy and disciplined investment approach. Without those, the revolving nature of the facility can lead to poor decisions or blurred lines between deductible and non-deductible debt.

Interest Rate and Cost Considerations

Line of credit interest rates sit higher than standard variable home loan rates, often by 0.5% to 1.5% depending on the lender. Some lenders also charge annual facility fees that range from $150 to $400, and certain products require periodic reviews where the lender reassesses your income and property value to maintain the facility. If your circumstances change or property values decline, the lender can reduce your limit or request a partial repayment.

The higher interest rate affects your cashflow directly. If you draw $80,000 from a line of credit at 7.5% instead of using a split loan at 6.5%, you're paying an extra $800 per year in interest. That difference reduces the benefit of the tax deduction, especially if your marginal tax rate is lower than 37%. For someone in the 32.5% tax bracket, the after-tax cost of the line of credit might still be higher than a fixed or variable split loan structure, even with the deduction applied.

Before committing to a line of credit, calculate the after-tax interest cost and compare it to alternative structures. In some cases, a redraw facility on a split loan or an offset account with a separate investment loan delivers better value without the higher interest rate. The right structure depends on how often you plan to draw down equity and how much control you need over the facility.

Keeping Investment and Personal Use Separate

The ATO requires that any debt claimed as a deduction must be directly linked to income-producing assets. If you use a line of credit for both investment and personal expenses, you lose the ability to claim the full interest as a deduction, and you may also face compliance issues if the records aren't clear. Every drawdown must be documented with a purpose, date, and amount, and the funds must go directly to the investment.

In our experience, the most common mistake is using a line of credit for a mix of purposes without separating the transactions. A homeowner draws $30,000 to invest in shares, then draws another $10,000 a few months later to renovate the bathroom. The total facility balance is $40,000, but only $30,000 is deductible. If the homeowner doesn't keep separate records, the entire interest claim could be disallowed during an audit. The safest approach is to use the line of credit exclusively for investment or to keep impeccable records that show exactly how much of the balance relates to each purpose.

Some lenders allow you to split a line of credit into sub-accounts, with one account for investment and another for personal use. Not all lenders offer this feature, so it's worth confirming before you apply. If your lender doesn't support sub-accounts, you'll need to rely on manual record-keeping, which increases the risk of error.

When a Split Loan Works Better Than a Line of Credit

A split loan structure divides your mortgage into two parts: one for non-deductible debt and one for investment debt. You draw a fixed amount from the investment portion, invest it, and start claiming the interest as a deduction. The loan is separate from your home loan and has its own account, which makes record-keeping straightforward and reduces the risk of mixing deductible and non-deductible debt.

For Brisbane homeowners who plan to make one or two large investments rather than ongoing smaller drawdowns, a split loan often delivers lower interest rates and fewer fees than a line of credit. The structure also gives you the option to fix the rate on the investment portion, which provides certainty over your deductible interest expense and protects you from rate increases. A line of credit is almost always variable, so you're exposed to rate movements regardless of market conditions.

The trade-off is flexibility. Once you draw from a split loan, that amount is locked in. If you want to draw more equity later, you'll need to apply for a new loan or increase the existing facility, which involves another application process. A line of credit lets you draw and repay as needed, which suits homeowners who want to invest gradually or take advantage of opportunities as they arise. The choice depends on whether you value cost certainty or ongoing access to equity.

Structuring the Facility for Repeat Recycling

If you plan to recycle debt over multiple years, the structure needs to accommodate growing equity and increasing investment balances. A line of credit works well for repeat recyclers because it scales with your equity position without requiring constant refinancing. As your home loan balance drops and your property value holds or increases, the line of credit limit can be adjusted upward, giving you access to more funds for additional investments.

The key is to ensure the facility is set up with enough headroom from the start. If you set a $100,000 limit but plan to invest $200,000 over five years, you'll need to increase the limit later, which may involve a full reassessment of your income and serviceability. Some lenders cap the loan-to-value ratio on line of credit facilities at 80%, which means you can only access equity up to that threshold. If you're planning to implement your strategy over a longer period, confirm the lender's policies on limit increases before you commit.

The facility should also align with your investment timeline. If you're drawing funds every six months to invest in a diversified portfolio, a line of credit gives you the control to manage that process without external delays. If you're making a single large investment and holding it long-term, a split loan or separate investment loan is likely more cost-efficient and easier to manage.

Serviceability and Lender Appetite for Line of Credit Facilities

Not all lenders assess line of credit serviceability the same way. Some lenders calculate repayments based on the full facility limit, even if you've only drawn a small portion. If you have a $150,000 limit and you've drawn $40,000, the lender might assess your serviceability as if you've drawn the full $150,000. This affects your borrowing capacity and can prevent you from accessing other finance in the future.

Other lenders assess based on the drawn balance plus a buffer, which gives you more flexibility but still reduces your available borrowing capacity compared to a standard loan. Before applying, ask the broker or lender how they assess line of credit serviceability and whether it will affect your ability to borrow for other purposes. If you're planning to buy an investment property in the next few years, a line of credit might limit your options more than a split loan would.

Lender appetite for line of credit facilities has also tightened in recent years. Some lenders no longer offer them to new customers, and others have reduced the maximum loan-to-value ratios or imposed stricter income verification requirements. If you're self-employed or have variable income, you may find it harder to get approval for a line of credit than for a standard home loan or investment loan. The reduced lender panel means fewer options to compare, so working with a broker who understands which lenders still support these structures is valuable.

Cashflow Impact and Ongoing Management

A line of credit requires active management. Unlike a standard loan with fixed repayments, the interest is often capitalised or paid from the facility itself, which means the balance can grow over time if you're not making regular payments. Some lenders require interest-only payments on the drawn balance, while others allow full capitalisation up to the approved limit. If the interest compounds and the balance grows without any offset from investment income, your equity position deteriorates and the tax benefit diminishes.

The cashflow impact depends on how you structure the repayments and whether your investment generates income to cover the interest. If you're investing in growth assets that don't pay distributions, you'll need to fund the interest from other sources, which puts pressure on your household budget. If the investment pays quarterly dividends or rental income, you can use that income to offset the interest cost and reduce the out-of-pocket expense. The structure works most efficiently when the investment income at least partially covers the interest, leaving you with a manageable net cost after the tax deduction.

For home owners with tight cashflow, a line of credit can create problems if the interest capitalises and the balance grows faster than expected. Before setting up the facility, calculate the monthly interest cost at the current rate, factor in your tax refund, and confirm you can cover the shortfall without affecting your ability to meet other commitments. If the numbers don't work, a smaller facility or a different structure might be more appropriate.

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