In short: Debt recycling means paying down your non-deductible home loan and then re-borrowing the same amount, through a separate loan split, to buy income-producing investments. The interest on that split becomes tax deductible because the funds were used to produce assessable income. Your total debt does not fall. You have swapped a safe position for a leveraged one, so it only suits people with surplus income and a long horizon.
This is one of the few genuinely powerful strategies available to ordinary salary earners, and also one of the easiest to get wrong in a way that costs you the deduction permanently.
The problem it solves
Interest on your home loan is not deductible, because the home does not produce assessable income. Interest on money borrowed to buy income-producing assets is deductible, because it does. The ATO's test is the use of the funds, not the security behind them and not the label on the account.
If you have $500,000 of non-deductible home debt and $50,000 in savings, you can sit on the savings, pay them into the loan, or invest them. Debt recycling is a fourth option: pay down the home loan, then borrow that amount back for investment, so the same $500,000 of debt now has a deductible component.
How the mechanics actually work
Step by step
- Split the loan structure first. Ask your lender to set up your home loan as Split A (the existing home debt) and a second facility, Split B, which will be used only for investment. Some lenders do this as a second loan account; some as a line of credit.
- Pay a lump sum into Split A. Say $50,000. The home loan balance falls to $450,000.
- Reduce Split A's limit and increase Split B's, or draw Split B down for the matching amount. The critical point is that the borrowed money must leave the investment split and go directly to the investment.
- Invest the $50,000 in income-producing assets: listed shares, a managed fund, an ETF that pays distributions, or an investment property deposit.
- Direct the tax refund and any distributions back into Split A, the non-deductible loan. That is what makes it a cycle.
- Repeat each year with your surplus income.
The two rules you cannot break
The loan must be split, never mixed. If you draw investment money out of the same account that carries your home debt, you create a mixed-purpose loan. Every subsequent repayment is then apportioned across both purposes and you can never fully repay the private portion first. Untangling a contaminated loan is difficult, sometimes impossible. This is also why paying investment costs from a home loan redraw is a bad idea. Read offset versus redraw.
Deductibility follows the use of the funds. Borrowing against your home to buy shares gives a deduction. Borrowing against an investment property to buy a car does not. The security is irrelevant. Document the trail: the split drawn down on a date, the money going to the broker on the same date, the units purchased.
Worked example
Priya and Sam own a home in Craigieburn worth $800,000 with a $500,000 loan, for illustration at 6.00% p.a. over 30 years. They have $50,000 in savings and about $2,000 a month of genuine surplus. Priya's marginal rate is 30% plus the 2% Medicare levy, so 32%.
Year one
- Pay $50,000 into the home loan. Balance: $450,000.
- Establish Split B with a $50,000 limit and draw it in full, directly to their share broker.
- Structure now: Split A $450,000 non-deductible, Split B $50,000 deductible. Total debt still $500,000.
- Interest on Split B at 6.00%: $50,000 × 0.06 = $3,000, fully deductible.
- Portfolio distributions at, say, 4%: $2,000 of assessable income (ignoring franking credits, which would improve this).
- Net taxable loss on the investment: $3,000 − $2,000 = $1,000
- Tax saving at 32%: $320
- Net cash cost in year one: $2,000 received − $3,000 paid + $320 refund = $680
That $680 is the price of converting $50,000 of debt to deductible and owning $50,000 of growth assets. If the portfolio falls 20% in year one, the paper loss is $10,000, which dwarfs the tax benefit.
After ten years, repeating with $24,000 of surplus a year
| Start | After 10 years of recycling | |
|---|---|---|
| Non-deductible home debt | $500,000 | about $260,000 |
| Deductible investment debt | $0 | about $240,000 |
| Total debt | $500,000 | $500,000 |
| Investment portfolio value | $0 | $240,000 invested, plus or minus market returns |
| Annual deductible interest at 6.00% | $0 | about $14,400 |
| Tax value of that deduction at 32% | $0 | about $4,608 a year, less tax on distributions |
The total debt has not moved. What has changed is that nearly half of it now generates a deduction, with a portfolio sitting against it. Compare that with extra repayments: $24,000 a year for ten years would have cut the balance to roughly $190,000 with no market risk at all. Model that in the extra repayments calculator, and the structure in the split loan calculator.
The risks, stated plainly
- It is leverage. You are borrowing to invest. A 20% market fall on a $240,000 portfolio is a $48,000 loss, and the $240,000 of debt does not fall with it.
- You still owe the money. Debt recycling does not reduce debt. Someone who recycles and then loses their job owes exactly as much as before, with part of the money in assets they may have to sell at the wrong time.
- It needs genuine surplus income. If the monthly surplus is fragile, the strategy is fragile. It is not for households running close to the line.
- Rate rises hurt twice. Higher interest on the whole $500,000, and a higher hurdle for the investment to clear. Lenders assess you at your rate plus 3 percentage points for a reason.
- Selling has tax consequences. Realising gains triggers capital gains tax, with the 50% discount only if held more than 12 months. See capital gains tax on property for the property equivalent.
- Mixed-purpose contamination is often permanent. One careless redraw can cost you the deduction on the entire split.
Who it suits and who it does not
Reasonable candidates
- Stable income well above expenses, with a cash buffer already in place
- Marginal tax rate of 30% or higher, so the deduction is worth something
- A ten-year-plus horizon and the temperament to hold through a fall
- A home loan with proper split facilities and no fixed-rate restrictions on extra repayments
Poor candidates
- Variable or seasonal income, or a job at risk
- Anyone within a few years of needing the capital, or who would sell in a 25% drawdown
- Anyone on a low marginal rate, where the deduction is worth little
If your goal is an investment property rather than a portfolio, the same principles apply through a separate deposit split. Read how to use equity to buy an investment property and negative gearing explained, which covers the deduction side in more depth.
Set-up checklist
- Build an emergency buffer outside the strategy first, ideally in an offset against the home loan.
- Ask the lender for a separate, clearly labelled investment split with no redraw you might use accidentally.
- Never deposit into the investment split. Pay its interest from a transaction account.
- Draw down and invest on the same day, with no detour through a personal account.
- Keep the contract note, the drawdown confirmation and the bank statement together for each cycle.
- Get a tax adviser to sign off the structure before the first drawdown, not after.
Frequently asked questions
Is debt recycling legal in Australia?
Yes. It relies on an ordinary principle of tax law: interest is deductible where the borrowed funds are used to produce assessable income. Nothing about the strategy is aggressive, provided the loan splits are genuinely separate and the fund flow is documented. It is the sloppy execution, not the concept, that creates problems.
Why does the loan have to be split?
Because a loan used for both private and investment purposes becomes a mixed-purpose loan. Repayments are then apportioned between the two purposes and you cannot direct them to the private portion first. Keeping a separate, dedicated investment split means the interest on it is clearly and entirely deductible, and it stays that way.
Does debt recycling reduce my debt?
No, and this is the most common misunderstanding. Your total debt stays the same. What changes is that part of it becomes deductible and is matched by an investment asset. If your goal is simply to be debt free sooner with no market exposure, extra repayments into the home loan do that job with far less risk.
What can I invest in?
Anything that produces, or is expected to produce, assessable income: listed shares, ETFs and managed funds that pay distributions, or a deposit toward an investment property. Assets bought purely for capital growth with no expectation of income are a weaker position for the deduction. Get specific advice on the assets you have in mind.
What if the market falls right after I start?
You hold a portfolio worth less than the debt behind it, and the debt does not shrink. This is why the strategy demands a long horizon, a cash buffer and a stable income. Selling into a fall crystallises the loss and leaves the debt. If a 25% drawdown would force your hand, the strategy is not appropriate for you.
Talk to GNT Finance
Debt recycling lives or dies on the loan structure, and that is our part of it. We will set up clean, properly separated splits with a lender that supports them, and work alongside your accountant so the tax side is signed off before the first dollar moves. There is no cost to you for our home-loan service in most cases.
Book a free consultation or call 0426 403 703.
This page is general information only and not legal, tax or financial advice. Laws change — confirm current rules with the State Revenue Office, the ATO or a licensed professional.
Written by Gorakh Timilsina
Founder, CEO & Senior Mortgage Consultant at GNT Finance. Gorakh started as a broker assistant, spent years as a senior credit officer assessing loan applications, and now helps Melbourne families get the right loan approved. English, Nepali and Hindi spoken.