If you have a home loan in Australia, or you’re in the market for one, you’ve likely come across the term “offset account” Lenders promote them as a way to save thousands in interest and pay off your mortgage sooner. But how exactly do they work, and are they the right choice for every borrower?
What Is An Offset Account?
An offset account is a transaction account linked to an eligible home loan. The balance in the offset account reduces the amount of your loan that is charged interest.
For example, if you have a home loan of $500,000 and $20,000 in your offset account, you will only be charged interest on $480,000.
The money in the offset account doesn’t earn interest the way a savings account would. Instead, you save money by paying less interest on your home loan. Over time, paying less interest means more of your repayments go towards reducing the loan balance itself, which can help you pay off your home sooner.
How Does An Offset Account Work?
An offset account functions like an everyday bank account. You can have your salary paid into it, pay bills, set up direct debits, and use a linked debit card for everyday spending.
Interest on most Australian home loans is calculated daily. Each day, your lender subtracts your these accounts balance from your loan balance before calculating interest. This means the more money you keep in your offset account, and the longer it stays there, the more interest you can save.
Importantly, an offset account does not usually reduce your regular mortgage repayment amount. Instead, it reduces the interest charged on your loan, which means a greater share of each repayment goes towards paying off the principal.
Full Offset vs Partial Offset
Most offset accounts offered by Australian lenders are 100% offset accounts, meaning every dollar in the account reduces your home loan balance in full for interest calculation purposes.
Some lenders offer partial offset accounts, where only a portion of your balance is offset against the loan. For example, with a 50% partial offset, $50,000 in the account would only offset $25,000 of your loan balance. Confirm with your lender whether the product is a full or partial offset, as the difference in savings can be significant over the life of a loan.
The Tax Advantages
One of the most compelling reasons Australians use these accounts is the tax treatment. The interest you save by using an offset account is generally not taxable, because you are reducing an expense rather than earning income.
By contrast, interest earned on a savings account is taxable at your marginal rate. For borrowers in higher tax brackets, this makes an offset account more tax-efficient than holding cash in a savings account.
For investment property loans, using an offset account rather than making extra repayments can carry an additional benefit. Because the money in this type of account does not reduce the outstanding loan principal, the loan’s original purpose remains unchanged. Withdrawing money from an offset account does not typically change the character of the loan, whereas redrawing funds from a loan for private purposes can create a mixed-purpose loan with different tax implications. Tax outcomes depend on individual circumstances, so always seek advice from a registered tax agent.
Offset Account vs Redraw Facility
A redraw facility allows you to make extra repayments directly into your loan and then withdraw those funds later. It is not a separate bank account — it is a feature that sits inside your loan.
While both reduce the interest you pay, the key differences are:
- Access: With an offset account, you can access funds instantly using a debit card or online banking. Redraw may take longer, and some lenders charge a fee per transaction
- Tax treatment: Withdrawing from an offset account does not typically change the purpose of the underlying loan. With redraw, the tax treatment of interest on redrawn funds may depend on the purpose for which those funds are used.
- Cost: Offset accounts are often part of a package with an annual fee, while redraw facilities are usually free.
For owner-occupiers focused on minimising costs, a redraw facility may be more economical. An offset account may be useful for some property investors because it can avoid some redraw-related tax complications, though individual circumstances vary.
Costs and Potential Traps
Offsets are not free. Lenders typically charge for the feature through higher interest rates, additional account fees, or a combination of both. Common costs include an annual package fee, a monthly fee at some lenders, and a higher interest rate compared to a basic variable loan without an offset feature.
The break-even point depends on your loan size, the rate premium, and any fees. If you consistently maintain a healthy savings balance, the interest savings are likely to outweigh the costs. If you typically keep only a small balance, the fees and higher rate may outweigh the benefit.
There is also a regulatory concern worth noting. In July 2026, ASIC published a review finding that banks representing more than 70% of Australia’s home loan market had failed to properly set up, link, or monitor these accounts for some customers. Banks paid over $55 million in compensation for offset failures between September 2023 and August 2025. Because mortgage repayments stay the same when an offset fails, the harm can go unnoticed for years.
*This article is provided for general informational purposes only and does not constitute financial or tax advice. For guidance specific to your circumstances, consult a licensed financial adviser or registered tax agent.
