Debt recycling: turn your home loan into tax-deductible debt
This debt recycling article was last updated July 2026. Written by Stuart Wemyss, founder of ProSolution Private Office and author of Wealth by Design.
If you have a home loan and some spare cash flow each month, you have probably wrestled with the same question I hear from clients all the time. Should I pay down the mortgage, or should I invest?
Most people treat it as an either or decision. It does not have to be. Debt recycling is a strategy that lets you do both at once. Over time, it converts the non-deductible debt on your home into tax-deductible investment debt, without increasing how much you owe in total.
The strategy is not new, but the best way to use it has changed. Since the 2026 Federal Budget, the tax rules for property investors have shifted, and that has made the shares version of the strategy the one that still works cleanly. I will explain why below.
This page covers what the strategy is, why it works, and who it suits. The step-by-step method, the worked example and the checklists sit in a free guide you can download at the end.
The page teaches the thinking. The guide shows you how to implement it.
What is debt recycling?
Debt recycling gradually replaces non-deductible home loan debt with tax-deductible investment debt.
It does not make the debt magically disappear, and it does not reduce what you owe by itself. You still need sufficient surplus cash flow to repay the debt over time. The strategy simply improves the tax treatment of that debt as you do so.
Home loan interest is not deductible because the money was used to buy your home. Investment loan interest generally is deductible when the borrowed money is used to earn assessable income, such as dividends and capital gains.
Your total borrowings do not increase. The tax character of the debt changes.
Consider two households with the same $1.5 million of debt and the same investments. One holds most of its debt as a non-deductible home loan. The other has progressively recycled that debt into deductible investment borrowings. Their net worth and net debt are the same, but the second household pays less tax and has stronger after-tax cash flow.
That is the benefit. Debt recycling does not eliminate debt. It makes the debt you are already repaying more tax-efficient.
Why the tax treatment of your debt matters so much
The size of this effect surprises people, so it is worth putting numbers on it.
Assume a $600,000 home loan at an interest rate of 6% per annum. That is $36,000 of interest each year, and none of it is deductible. If that same $36,000 of interest were deductible against income taxed at 47%, the after-tax cost would fall to roughly $19,000. The difference, close to $17,000 a year, is the value the tax system returns to you once the debt is deductible.
Now compound that difference over 20 or 30 years. The tax you save can be reinvested, and those reinvested amounts earn returns of their own. This is why the tax nature of your debt, not just the amount, has such a large effect on how much wealth you build.
The strategy captures that difference deliberately and progressively. Every dollar of home loan you convert into a properly structured investment loan moves interest from the non-deductible column to the deductible column.
There is an important discipline here, which I will return to. The benefit only holds if the structure is clean. Mix your home debt and investment debt in one loan, or muddle the paper trail, and you put the deduction at risk. Getting the mechanics right is the difference between a strategy that works and one that invites an audit.
How does debt recycling work in practice?
A debt recycling strategy uses your surplus cash flow to repay your non-deductible home loan. You then borrow the same amount through a separate investment loan and invest it in income-producing assets, typically shares (ETFs).
Your home loan falls, your deductible investment debt rises and your total debt remains broadly unchanged. Repeating this process gradually converts home loan debt to tax-deductible debt while building an investment portfolio.
A simple debt recycling example is this: repay $50,000 of your home loan, borrow $50,000 through a separate loan split and invest it in shares. You still owe the same amount overall, but $50,000 of previously non-deductible debt has been replaced with potentially deductible investment debt.
Over time, debt recycling into shares can leave you with a smaller or fully repaid home loan and a portfolio funded by deductible debt. However, debt recycling does not repay debt by itself. You still need sufficient surplus cash flow to reduce your total borrowings over time.
The structure and movement of money are critical. In Australia, interest deductibility depends on how the borrowed funds are used. The downloadable guide explains the loan splits, cash movements, record-keeping requirements and a complete worked example of debt recycling in Australia.
Why debt recycling now points to shares, not property
For years, a common debt recycling strategy was to direct recycled debt into a negatively geared residential investment property. That is no longer as attractive because the law has changed.
From 1 July 2027, losses on established residential property bought after 7.30pm on 12 May 2026 will be quarantined. They can no longer be offset against salary or other income in the year they arise. The 50% capital gains tax discount will also be replaced by indexation, subject to a minimum 30% tax rate.
This matters because debt recycling works by converting home loan debt to tax-deductible debt. Quarantining property losses removes much of the immediate tax benefit that made established property attractive. I estimate the after-tax return on an investment-grade established property has fallen from about 11% per annum to 8.4%.
Debt recycling into shares is different. Interest on money borrowed to buy income-producing shares remains deductible under the ordinary purpose test. The negative gearing restrictions apply to established residential property, not shares.
The capital gains tax changes still apply to both shares and property. Shares are not tax-free. The key distinction is interest deductibility: it remains intact for debt recycling shares but has been weakened for established property.
Therefore, for anyone considering debt recycling in Australia, a well-constructed, diversified share/ETF portfolio is now the cleaner option. A typical debt recycling example is to repay part of your home loan, redraw that amount through a separate investment split and invest it in income-producing shares.
That does not mean the property tax changes will last forever. Negative gearing was quarantined in Australia in 1985 and reinstated in 1987. New Zealand also removed interest deductibility before reversing course. My view is to preserve your options, avoid poor-quality substitutes and invest only where the after-tax return justifies the risk.
Debt recycling into a quality share/ETF portfolio satisfies that test, regardless of what happens to property tax policy.
Who debt recycling suits, and who it does not
Debt recycling can be powerful, but it is not suitable for everyone. Before starting, you should be able to answer yes to three questions.
First, do you have a sufficient financial buffer? Depending on the security of your income, you should generally have access to between 6 months and 2 years of living expenses as a buffer. If your income is volatile or uncertain, aim for a buffer closer to 1 or 2 years.
Second, are you on track to repay your non-deductible home loan well before retirement? Debt recycling relies on surplus cash flow continuing to reduce that debt. If your cash flow is insufficient, the strategy is premature.
Third, could your household comfortably manage higher interest rates? If a rate rise would place your cash flow under pressure, reducing debt should take priority over borrowing to invest.
Beyond these three tests, debt recycling is best suited to people with stable income, a long investment horizon and the temperament to tolerate share market volatility. Shares can fluctuate significantly more than residential property. That volatility should matter little over the long term, but only if you can stay invested. Selling during a downturn turns a temporary fall into a permanent loss.
Debt recycling is unlikely to suit you if you are approaching retirement, your cash flow is already tight or a falling portfolio would cause you to abandon the strategy. Being honest about that last point is more valuable than any spreadsheet.
The tax rules that make or break it
A debt recycling strategy depends on the investment interest remaining tax deductible. The burden of proving that deductibility rests with you, not the Australian Taxation Office.
The most important rules are:
Purpose determines deductibility. Interest is generally deductible when the borrowed money is used to earn assessable income. Therefore, the use of every borrowed dollar must be clear.
Keep every loan separate by purpose. Do not mix home loan and investment debt, or use one loan split for multiple investments types or owners. Clean loan splits and records make it easier to prove that you used the debt recycling strategy to convert home loan debt to tax-deductible debt.
Match the borrowers and investment owners, or document the difference. If a loan is jointly held but the ETF portfolio is owned by only one spouse, a written loan agreement should record that the non-investing spouse has on-lent their 50% share of the borrowed funds to the investing spouse. This creates a clear legal and tax trail linking the full loan to the income-producing investment.
Treat every redraw as new borrowing. Its tax treatment depends on how the redrawn money is used. A clean debt recycling example is to repay a home loan split, redraw directly into a brokerage account and buy income-producing shares. Using the redraw for private spending can contaminate the loan.
Use an offset account for investment debt where possible. Repaying an investment loan and later redrawing can change the tax character of the debt. Holding surplus cash in an offset account usually preserves greater flexibility.
Debt recycling rewards careful structure and record-keeping. Sloppy transactions can put the interest deduction at risk. The downloadable guide includes a practical list of what to do, and what to avoid.
Borrowing capacity, the quiet constraint
Debt recycling uses borrowing capacity, so before starting a debt recycling strategy, you need to understand how much capacity you have and how to preserve it.
Borrowing capacity has fallen materially in recent years because of higher interest rates and the 3% serviceability buffer lenders apply. That means the amount you can use to convert home loan debt to tax-deductible debt may be lower than it once was.
Several factors can improve capacity. Credit card limits are often assessed at around 3% to 4% per month, meaning $100,000 of limits may be treated as a $3,000 to $4,000 monthly commitment. Cancelling unused cards, or switching to a charge card without a preset limit, can help.
Resetting a loan term to 30-35 years may also reduce the assessed repayment. Lowering discretionary spending before applying can improve the result because lenders review bank statements. For self-employed borrowers, income and distribution structures can either help or hinder capacity, which is why your accountant and mortgage broker should coordinate.
A simple debt recycling example may involve using available capacity to establish separate loan splits and invest in debt recycling shares. However, how much you can recycle depends on lender policy, income, expenses and existing debts.
The guide includes the full list of borrowing capacity strategies relevant to debt recycling in Australia, including several that are commonly overlooked.
Get the structure right from the start
One theme runs through everything above: debt recycling is a finance and structuring strategy, not a product strategy. The interest rate matters, but the loan structure matters more because it protects your deductions and flexibility for decades.
That means separating loans by purpose, avoiding cross-securitisation, keeping the investment split interest only while non-deductible home debt remains, and directing surplus cash flow into the home loan offset.
These foundations must be established correctly from the outset. Some decisions, including the maximum amount of deductible debt you can create, may only be available when the loan is first structured.
That is why good credit and tax advice matters. Debt recycling is simple in concept but unforgiving in execution.
Download the debt recycling starter guide
This page explains how debt recycling works and who the strategy may suit. The free guide shows you how to implement it.
Inside, you will find a readiness checklist to test whether you are ready to start, the step-by-step method for setting up the loan splits and running the monthly investment, a worked example that shows your debt mix shifting from non-deductible to deductible over time, the tax-deductibility rules written as plain do and do not points, and the borrowing capacity checklist.
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General advice disclaimer: This page contains general information only. It does not take into account your objectives, financial situation or needs. It is not personal financial advice or credit advice. ProSolution Private Office holds an Australian Financial Services Licence and an Australian Credit Licence, and its directors are registered tax agents. Before acting on any information on this page, you should consider its appropriateness having regard to your own circumstances, and obtain personal financial, credit and tax advice. Past performance is not a reliable indicator of future performance.
