Offset Account vs Redraw for an Investment Property: The Tax Difference Australian Investors Need to Understand
- August 31, 2026
An offset account and a redraw facility can look almost identical on the surface.
Put an extra $50,000 against a $600,000 mortgage and, depending on the product, you may effectively pay interest on $550,000.
So why should a property investor care whether that $50,000 sits in an offset account or has actually been paid into the loan?
Because the moment you take the money back out, the difference can become important.
For Australian property investors, an offset account generally holds your cash separately from the loan, while money accessed through redraw is generally treated as new borrowing. For tax purposes, what that newly borrowed money is used for can affect whether the associated interest is deductible.
That distinction can become especially important when a property is—or later becomes—an investment property.
The simple difference between an offset account and redraw
An offset account is generally a transaction account linked to a home loan.
The money remains in the account, but its balance is used to reduce the amount of the mortgage on which interest is calculated.
Moneysmart gives a straightforward example: if your mortgage is $750,000 and you have $50,000 in your offset account, interest is generally calculated on $700,000.
A redraw facility works differently.
Extra repayments are paid into the loan itself, reducing the outstanding loan principal. If the loan permits it, you may later be able to redraw some of those additional repayments.
Financially, the interest-saving effect can initially look similar.
Legally and for tax purposes, however, withdrawing $20,000 from your offset account and redrawing $20,000 from your mortgage are not necessarily the same transaction.
Why redraw can become a tax issue for property investors
The Australian Taxation Office’s Taxation Ruling TR 2000/2 states that a redraw from a loan account is a separate borrowing.
The tax treatment therefore follows the use of the redrawn money.
If borrowed funds are used for an income-producing purpose, the associated interest may generally be deductible, subject to the normal tax rules.
If they are used for a private purpose, the corresponding interest is generally not deductible.
That remains relevant even if the security behind the loan is an investment property.
That is the part many investors miss.
What secures the loan does not, by itself, determine whether the interest is deductible. The purpose for which the borrowed money is used matters.
A simple example
Imagine an investor has:
Investment property value: $800,000
Investment loan: $500,000
Available redraw: $50,000
The original $500,000 borrowing relates to the income-producing property.
The investor then redraws $30,000 and uses it to buy a private car.
That $30,000 has been borrowed for a private purpose.
According to the ATO’s principles, the interest attributable to that private borrowing would generally not be deductible. The loan now contains both an income-producing component and a private component.
This is commonly described as a mixed-purpose loan.
And this is where administration can become much more complicated.
Why mixed-purpose loans can become messy
Suppose your investment loan is now:
$500,000 investment-related debt
plus
$30,000 privately used redraw
You might assume you can simply make the next $30,000 of repayments against the private portion.
The ATO’s ruling makes that assumption problematic.
For a mixed-purpose loan, principal repayments generally cannot simply be notionally allocated only to the private component. The deductible and non-deductible portions may need to continue being apportioned.
That can create an ongoing record-keeping burden.
Instead of looking at one loan balance and one annual interest figure, your accountant may need to determine how much of the debt relates to income-producing activity and how much relates to private use.
Why an offset account can behave differently
Now consider the same investor with $50,000 sitting in an offset account rather than available as redraw.
The mortgage remains $500,000.
The offset simply reduces the balance on which interest is calculated.
If the investor withdraws $30,000 of their own cash from that genuine offset account to buy a car, they have generally withdrawn their money, rather than borrowing another $30,000 from the mortgage.
The offset balance falls, so more interest may subsequently be charged on the investment loan.
But the underlying loan has not necessarily acquired a new $30,000 private borrowing.
This distinction is one reason investors should understand exactly what type of account their lender has provided rather than treating the words offset and redraw as interchangeable.
The trap when your home later becomes an investment property
This issue can become even more important for homeowners who intend to upgrade later and retain their current property as a rental.
Imagine you originally borrowed $600,000 to buy your home.
Over several years you pay an additional $150,000 directly into the mortgage, reducing it to $450,000.
Later, you decide to buy another home and turn the first property into an investment.
You redraw the $150,000 and use it towards the deposit on your new private residence.
It can be tempting to think:
The old property is now worth $900,000 and has a $600,000 mortgage, so the interest on $600,000 should be an investment-property expense.
But that is not necessarily how the tax analysis works.
The ATO looks at what borrowed money was used for.
If the redrawn $150,000 was used towards a private home, the purpose of that borrowing is private—even though the loan may be secured against a rental property.
The ATO specifically notes that interest on money borrowed to purchase a new home cannot simply become deductible because the loan is secured against the former home that is now rented.
That can make a decision made years before a property becomes an investment relevant much later.
What if the redraw is used for the investment property?
Redraw itself is not inherently a tax problem.
Purpose is the key.
The ATO states that interest may generally be deductible on borrowing used for income-producing purposes, including eligible borrowing relating to a rental property. Its published guidance includes circumstances involving loans for repairs, renovations and depreciating assets associated with rental properties.
Likewise, an ATO private ruling applying TR 2000/2 found that interest on redrawn funds used to purchase an investment property could be deductible because the redraw was used for an income-producing purpose.
The important question is therefore not simply:
Did you redraw?
It is:
What did the redrawn money pay for?
Four records investors should keep
If you use redraw on a loan connected with an investment property, retain clear records showing:
- the loan balance immediately before the redraw;
- the amount redrawn;
- where the money was transferred; and
- what the money was ultimately used to purchase or pay.
Bank statements, settlement statements, invoices and receipts can become important evidence of the purpose of borrowed funds.
Avoid unnecessarily moving borrowed money through multiple unrelated accounts, because tracing the ultimate use of funds can become harder.
For individual circumstances, an accountant or registered tax agent should determine the appropriate treatment.
Offset and redraw also affect your live portfolio numbers
The tax issue is only one part of the picture.
Where your cash sits can also affect:
- outstanding loan balance;
- interest charged;
- cash available to you;
- property cash flow;
- total debt;
- equity calculations;
- LVR; and
- future borrowing or refinancing discussions.
Know the numbers behind your loan before you change it.
Property Dollar brings your property value, outstanding loan, equity, LVR, expenses, rental income and portfolio performance into one place.
Track the numbers. Spot changes earlier. Then take the right questions to your broker, accountant or adviser.
Download Property Dollar and add your property today.
That means an investor looking only at the property’s market value is missing a significant part of their financial position.
For example, the Property Dollar portfolio dashboard brings property value and total equity together, while the property view tracks figures including market value, outstanding loan, equity, LVR, expenses and rental income.
The objective isn’t to tell you whether you should use redraw or offset.
It is to make the numbers surrounding that decision visible.
Before moving money, ask these questions
Before making a large extra repayment or redraw involving a property that is—or may become—an investment, ask:
Is this genuinely an offset account or a redraw facility?
Will paying the money into the mortgage permanently reduce the loan principal?
If I take that money back later, what will I use it for?
Could this property become an investment property in future?
Would the transaction create mixed-purpose debt?
Can I clearly trace the use of the borrowed funds?
Have I checked the tax treatment with my accountant or registered tax agent?
Those questions can be far more useful than simply asking which option saves the most interest today.
The bottom line
Offset accounts and redraw facilities can both reduce mortgage interest, but they do not necessarily behave the same way once money comes back out.
An offset account generally keeps your cash separate from the loan.
A redraw is generally treated as another borrowing, and the purpose of that borrowing can determine the tax treatment of its interest.
For property investors, that means a seemingly ordinary transfer can potentially turn a clean investment loan into a mixed-purpose loan requiring ongoing apportionment.
The smartest starting point isn’t trying to maximise a deduction.
It’s knowing exactly what you owe, what your property is worth, where your equity sits and how your loan is structured—and getting professional tax advice before making a transaction whose consequences could remain with the loan for years.
Property Dollar helps you keep the underlying property numbers visible: market value, outstanding loan, equity, LVR, rental income, expenses and portfolio performance in one place.
That makes it easier to have a better-informed conversation with your accountant, broker or adviser before changing your loan structure.
This article contains general information only and is not financial, tax, credit or investment advice. Tax outcomes depend on individual circumstances. Consider obtaining advice from a registered tax agent or other appropriately qualified professional.
Offset Account vs Redraw for an Investment Property: The Tax Difference Australian Investors Need to Understand
[sc_fs_multi_faq headline-0=”h3″ question-0=”Is redraw from an investment property loan tax deductible?” answer-0=”Not automatically. The ATO says the deductibility of interest on redrawn money depends on how the redrawn funds are used. If they are used for an income-producing purpose, associated interest may be deductible; if used privately, the corresponding interest generally is not.” image-0=”” headline-1=”h3″ question-1=”Is taking money from an offset account the same as redraw?” answer-1=”No. A genuine offset account is a separate transaction account whose balance reduces the amount of the linked mortgage charged interest. Redraw involves accessing additional repayments previously made into the loan itself.” image-1=”” headline-2=”h3″ question-2=”What happens if I redraw from an investment loan for personal expenses?” answer-2=”The loan may become mixed-purpose. Interest attributable to the privately used borrowing is generally not deductible, and interest and principal may need to be apportioned between income-producing and private components.” image-2=”” headline-3=”h3″ question-3=”Can I redraw from my home loan to buy an investment property?” answer-3=”Potentially. The ATO’s principles focus on the use of the borrowed funds. An ATO ruling has confirmed circumstances where interest on a redraw used to acquire an income-producing investment property was deductible. Individual circumstances should be checked professionally.” image-3=”” headline-4=”h3″ question-4=”Does securing a loan against an investment property make the interest deductible?” answer-4=”Not by itself. The purpose for which the borrowed funds are used is critical. The ATO specifically notes that borrowing for a new private home does not become deductible simply because it is secured against a former home that is rented.” image-4=”” headline-5=”h3″ question-5=”Should property investors use an offset or redraw?” answer-5=”There is no universally correct choice. Interest rates, fees, product features, access to cash, future plans and tax circumstances all matter. Investors should understand the structural difference and seek professional advice where tax consequences may arise.” image-5=”” count=”6″ html=”true” css_class=””]
