Beginner's Guide to Debt Recycling

What Debt Recycling Actually Means

Debt recycling is a loan structure that lets you convert your non-deductible home loan debt into tax-deductible investment debt by gradually redirecting your mortgage payments into income-producing assets.

The mechanics are straightforward: as you pay down your home loan, you redraw or borrow against that equity and invest the funds in shares, managed funds, or an investment property. Because the borrowed funds are used to generate assessable income, the interest on that portion becomes tax deductible. Over time, your non-deductible home loan shrinks while your deductible investment loan grows.

Consider a borrower in Double Bay who owes $600,000 on their owner-occupied apartment. They make a $50,000 principal repayment, then immediately redraw that $50,000 via a split loan structure and invest it in a diversified share portfolio. The $50,000 redrawn is now classified as investment debt, and the interest on that portion can be claimed as a deduction at tax time. Repeat this process over several years and the entire mortgage can be converted.

How the Loan Structure Works in Practice

The structure relies on keeping the home loan and investment loan in separate accounts so the ATO can clearly distinguish the purpose of each borrowing.

Most brokers recommend splitting your home loan into two or three sub-accounts at the outset: one for the remaining principal, one for the investment redraw, and sometimes a third offset account to park savings without contaminating the deductible loan. Each time you pay down your home loan, you redraw the exact amount from the investment split and invest it immediately. Timing matters: the redraw and the investment must happen in quick succession, and the funds must not be used for personal expenses in between.

A working professional in Woollahra earning $180,000 might structure a $1.2 million home loan as a $900,000 principal and a $300,000 investment split from day one. Each year, they redirect $60,000 in surplus cashflow to the principal split, then redraw $60,000 from the investment split to purchase shares. After five years, the principal split is down to $600,000, the investment split is up to $600,000, and the portfolio is generating franked dividends that further offset the loan interest.

Why Investment Loan Interest Is Deductible

The ATO allows you to claim interest as a deduction when the borrowed funds are used to produce assessable income.

This principle applies to any investment: residential property, commercial property, shares, or managed funds. The key requirement is that the income generated (rent, dividends, distributions) is taxable. Interest on debt used to buy your home is not deductible because your home does not produce assessable income. Interest on debt used to buy an investment property or a share portfolio is deductible because those assets do produce assessable income.

The tax benefit scales with your marginal rate. A self-employed borrower in Double Bay on the top marginal rate saves 47 cents in tax (including Medicare Levy) for every dollar of interest paid on the investment loan. At current variable rates, that means the after-tax cost of borrowing for investment purposes is roughly half the headline rate.

The Cashflow Question Most Borrowers Ask

Debt recycling does not reduce your total debt, so servicing becomes the central question.

You are still borrowing the same amount overall, but part of it now attracts a tax deduction. The offset comes from the investment income (dividends, rent) and the tax refund, both of which need to cover or reduce the interest cost on the investment loan. If the investment income and tax benefit exceed the interest cost, the strategy is cashflow positive. If they fall short, you will need to fund the gap from other income.

In our experience, borrowers with strong surplus cashflow and a marginal tax rate above 37% tend to see the greatest benefit. The structure works particularly well for professionals in Double Bay, Darling Point, and Bellevue Hill who have already paid down a portion of their home loan and have equity available but limited time to manage direct property investments.

What the ATO Requires for Compliance

The ATO expects clear separation between personal and investment debt, and a direct link between the borrowed funds and the income-producing asset.

You must keep the investment loan in a separate account, ensure the funds are not mixed with personal expenses, and retain documentation showing the investment purchase. If you redraw $50,000 and invest $48,000 while using $2,000 for a holiday, the entire $50,000 becomes contaminated and the deduction is lost. This is why most brokers insist on a clean split structure and direct transfer from the investment loan account to the investment platform.

The ATO also requires that the investment has a genuine prospect of producing assessable income. Shares that pay no dividends can still qualify if there is a reasonable expectation of future income, but speculative assets with no income potential may not meet the threshold.

When Debt Recycling Makes Sense

This strategy suits borrowers who have existing equity, stable income, and a long investment horizon.

You need enough equity to support the additional borrowing, sufficient cashflow to service both loans, and the discipline to invest consistently rather than spend the redrawn funds. The strategy works particularly well in the lead-up to retirement when your marginal tax rate is high and you want to build a portfolio that can eventually replace your salary.

We regularly see this structure used by self-employed borrowers in Double Bay who have built equity over ten or fifteen years and now want to accelerate wealth accumulation without selling their home or taking on a second property. The combination of high income, surplus cashflow, and a long time horizon makes the tax benefit meaningful.

How Debt Recycling Compares to Selling and Buying an Investment Property

Debt recycling achieves a similar outcome to selling your home and buying an investment property, but without the transaction costs or the need to move.

If you sold your home and bought an investment property of the same value, you would have a fully deductible loan, but you would also pay stamp duty, agent commissions, and moving costs. You would also need to rent elsewhere. Debt recycling lets you keep your home while gradually converting the debt into a deductible structure. The downside is that it takes longer and requires disciplined execution.

The strategy is also more flexible than direct property investment. You can invest in shares with as little as $10,000, whereas adding another property typically requires at least 10% to 20% deposit plus costs. For borrowers with equity but limited cash, debt recycling provides a way to put that equity to work immediately.

The Risks You Should Understand Before Starting

The main risks are investment loss, interest rate rises, and tax law changes.

Because you are borrowing to invest, any fall in the value of the investment does not reduce the size of the loan. If the share portfolio drops 20%, you still owe the full amount borrowed. Rising interest rates increase the cost of servicing both loans, which can squeeze cashflow if the investment income does not keep pace. And while the tax deduction is based on current law, future governments could change the rules around negative gearing or investment loan deductibility.

The strategy also assumes you have the risk tolerance to hold growth assets for the long term. If you are uncomfortable with volatility or need access to the funds within a few years, debt recycling may not suit your circumstances. A loan health check can help determine whether your current position and risk profile align with this approach.

What Happens at Tax Time

You claim the investment loan interest as a deduction on your tax return, along with any other investment expenses.

The lender will provide an annual statement showing the interest charged on each loan split. You include the investment loan interest in the same section of your return where you report your investment income (dividends, rent, distributions). The net result is that your taxable income is reduced by the amount of deductible interest, which increases your refund or reduces your tax payable.

Most borrowers also claim the cost of investment advice, platform fees, and accountant fees related to the investment. These additional deductions add to the overall tax benefit, though they should be tracked separately and supported by receipts.

Call one of our team or book an appointment at a time that works for you. We can walk through your current loan structure, run the numbers on your surplus cashflow, and help you decide whether debt recycling fits your plans. If it does, we will set up the split loan structure and make sure the paperwork is ATO-compliant from day one.

Frequently Asked Questions