Debt recycling is a label people use for a strategy that tries to replace non-deductible home-loan debt with debt used to buy income-producing investments, so that more of the interest might be tax-deductible. The Australian Taxation Office does not publish a product called debt recycling. What it does publish is the test that actually matters: interest is deductible, or not, according to the use of the borrowed money, not according to which property is used as security.

This explainer follows the ATO's interest-expense rules for rental properties, last updated 21 May 2026, and the official worked examples on mixed-purpose loans and redraws. It is not a recommendation to recycle debt, to borrow against a home, or to buy an investment.

This is general information only. It is not personal tax advice or financial product advice.

What people usually mean by the term

In outline, the idea is:

  1. you have a home loan on the home you live in. Interest on money used to buy that home is generally not deductible
  2. you pay down that home loan as quickly as you can, from salary or other after-tax cash
  3. you then borrow against the equity you have built, and use those new funds to buy an income-producing asset, such as a rental property or a portfolio of shares
  4. interest on the new borrowing may be deductible if the money is actually used to produce assessable income
  5. over time, more of your total interest bill relates to the investment loan, and less to the home loan

The tax outcome, if it is available at all, comes from the purpose of each dollar borrowed. The strategy only holds together if the investment is genuinely held to produce assessable income, the records are clean, and you can service both loans if rates rise or the investment falls in value.

Paying extra off a home loan, on its own, is not debt recycling. Borrowing to invest, on its own, is just an investment loan. The "recycling" part is the deliberate shift from one type of debt to the other.

The ATO test: use of the funds, not the security

The ATO's rental interest page states that if you use the principal to buy a rental property, and the property is rented or held to produce assessable income for the entire income year, you can claim a deduction for the interest charged on the loan. You claim only a portion if only part of the principal was used for the rental property, or if the property was used to produce rent for only part of the year.

You cannot claim interest:

  • for any period the property is used for private purposes, even a short period
  • on the portion of the loan used for private purposes, either when you took out the loan or when you refinance
  • on a loan you used to buy a new home if you do not use the new home to produce income, even if you use your rental property as security for the loan

The official Zac and Lucy example makes the security point concrete. They borrow $400,000, secured against their existing home, to buy a new home to live in, and they rent out the old home, which still has a $25,000 mortgage. They can claim interest on the $25,000 loan, because that home is now rented. They cannot claim interest on the $400,000 loan used to buy the new home, even though the loan is secured against the rental property. The new home is not being used to produce income.

If you reverse the labels and call the new borrowing "debt recycling", the same test applies. Security over the family home does not make the interest deductible. Using the money to buy an investment, and actually holding that investment to produce assessable income, might.

Mixed loans, redraws and the life of the loan

If one loan account is used for both private and investment purposes, the ATO requires you to keep accurate records and to separate the interest. You cannot only repay the private portion. All repayments must be apportioned across both portions for the length of the loan. The ATO points to Taxation Ruling TR 2000/2 for line-of-credit and redraw calculations.

Two official examples are especially relevant to anything marketed as debt recycling.

Yoko borrows $400,000 and uses $380,000 to buy a rental property and $20,000 to buy a private car. Interest for the year is $35,000. The deductible amount is $35,000 multiplied by $380,000 divided by $400,000, which is $33,250. The ratio, 95% deductible and 5% private, must be used for interest and for principal repayments for the life of the loan.

Tyler is ahead on an investment loan by $9,500 and redraws that amount halfway through the year to buy a television and a lounge suite. He can claim all of the interest up to the redraw, then only a reduced share afterwards. After the redraw the ratio is 97.4% deductible and 2.6% private, and that ratio also continues for the life of the loan.

The practical lesson is that a redraw from an investment loan for private spending can taint part of the interest from that point forward. A clean structure usually keeps the home loan and the investment loan in separate accounts or sub-accounts, and does not mix private spending into the investment facility.

The ATO's Pauline example shows a case where funds redrawn from a personal home loan to pay a rental-property deposit can support an interest deduction, including on an amount later refinanced by the investment lender, because those funds were used to buy the rental property. The Barbara example shows the opposite, where leftover loan funds parked for private use are not deductible. The difference is the use of the money, documented at the time.

You also cannot claim a deduction for extra payments that only reduce the principal.

Risks that sit outside the tax rules

Even where the interest deduction is available, the strategy has risks that the ATO pages are not there to assess:

  • you are increasing your total borrowings, or keeping them higher for longer, to buy an investment that can fall in value
  • a higher interest rate increases both the home-loan and the investment-loan repayments
  • if the investment is a rental property, the 2027 negative-gearing and CGT changes may affect new purchases of established dwellings. See the 2027 changes explainer and the negative gearing calculator
  • dividends, rent and franking credits are taxable, and they are not a guaranteed way to cover the extra loan
  • poor records can put the deduction at risk years later

This is one reason the strategy is often discussed with a registered tax agent and a licensed adviser, and why a generic online calculator is a poor substitute for a documented loan-purpose trail.

What to keep if you borrow to invest

If you do take out or split a loan for an income-producing purpose, the records that support an interest claim typically include:

  • loan contracts and any sub-account or split confirmations
  • settlement statements or contract notes showing where the borrowed money went
  • bank statements that show the flow of funds, without unexplained private drawings
  • a written allocation of any mixed-purpose balance, updated when a redraw or refinance changes it
  • evidence that the asset was used, or held, to produce assessable income

The ATO can ask for this years after the return is lodged.

Frequently asked questions

There is no separate debt-recycling law. Interest deductibility follows the ordinary rules on the use of borrowed funds. Arrangements that are a sham, or that do not match the paperwork, can be challenged. Whether a particular plan is appropriate for you is a different question, and that is personal advice.

Can I recycle debt against shares as well as property?

The same use-of-funds idea can apply to money borrowed to buy assets that produce assessable income, including shares. The evidence and the ongoing purpose still matter, and share lending has its own risks, including margin calls on some facilities. Get advice before you treat a share loan as interchangeable with a rental loan.

Will this reduce my home loan faster?

Paying extra off the home loan can reduce non-deductible interest. Borrowing again to invest puts debt back onto the balance sheet. Whether you end up ahead depends on the investment return after tax, fees and interest, and on your ability to keep the loans going. It is not an automatic saving.

General information warning

This article is general information only. It is not personal financial product advice or tax advice, and it is not a recommendation to recycle debt or to borrow to invest. It does not take into account your objectives, financial situation or needs. Interest deductibility depends on the facts, and borrowing against your home can put that home at risk. Consider speaking with a registered tax agent and a licensed adviser before you change a loan or buy an investment.

Sources

  • Australian Taxation Office, Interest expenses, last updated 21 May 2026, including the official Kosta and Jenny, Simone, Yoko, Zac and Lucy, Tyler, Pauline and Barbara examples.
  • Australian Taxation Office, Taxation Ruling TR 2000/2, Income tax: deductibility of interest on moneys drawn down under line of credit facilities and redraw facilities, as cited on the interest expenses page above.
  • Never Lose Interest, How negative gearing works and Negative gearing and CGT changes from 1 July 2027.

Last reviewed: November 2026.