Key Takeaways
- A 100% offset account reduces the interest charged on your home loan by the exact amount sitting in the offset, calculated daily on your loan balance minus your offset balance.
- ASIC found major failures across the big banks in 2026, with a significant share of offset accounts either never linked to the loan or linked with long delays, costing customers tens of millions in lost interest savings.
- Money sitting in the wrong account, salary not landing in the offset, and confusing redraw with offset are common reasons an offset isn’t pulling its weight, even when nothing has technically gone wrong.
- A five-minute check of your statement can tell you whether your offset is actually linked and working the way you assumed it was.
Here’s an uncomfortable statistic: in 2026, ASIC found that some of the country’s major banks had failed to properly link offset accounts to home loans in a significant share of cases, either never opening the linked account at all or leaving customers waiting weeks for it to be connected. Customers lost more than $55 million in interest savings because of it.
If a bank can get this wrong at scale, it’s worth checking your own setup rather than assuming your offset is doing what you think it’s doing.
How an Offset Account Actually Works
A 100% offset account is a transaction or savings account linked to your home loan. According to MoneySmart, the bank calculates the interest on your loan daily using your loan balance minus whatever is sitting in the offset account. Every dollar in the offset reduces the balance interest is charged on, without reducing your required minimum repayment — so the saving shows up as a shorter loan term or less interest paid over time, not a smaller monthly repayment.
Because that money isn’t earning interest itself, it isn’t taxable income the way interest from a standalone savings account would be. It’s simply reducing what you’re charged, which is generally more tax-effective than parking the same cash in a savings account and paying tax on the interest earned.
Partial Offset vs 100% Offset
Not all offset accounts are created equal. A 100% offset reduces your loan interest calculation by the full balance sitting in the account. A partial offset only offsets a percentage of the balance, so the same amount of cash delivers a smaller interest saving. If you’re not sure which one you have, it’s worth checking your loan documents or asking your lender directly, since the difference compounds over the life of the loan.
What ASIC Actually Found in 2026
ASIC’s review uncovered a pattern of basic administrative failures at some major banks: offset accounts that customers requested but that were never opened, accounts that were opened but never actually linked to the home loan, and links that took weeks longer than they should have. Every day an offset sits unlinked is a day it isn’t doing anything for you, no matter how much you’ve diligently saved into it.
The takeaway isn’t that offset accounts don’t work. It’s that “I have an offset account” and “my offset account is actually linked and reducing my interest” are two different things, and the only way to know which one applies to you is to check.
Run Your Own Offset Self-Audit
A few minutes with your loan statement can answer the questions that matter:
Is the Account Actually Linked?
Check your home loan statement for a line showing the offset balance against the loan. If you can’t see your offset balance reflected anywhere on your loan statement, that’s worth raising with your lender immediately.
Where Is Your Everyday Cash Actually Sitting?
It’s common to have a separate everyday transaction account and assume “my money is basically offsetting the loan” when it’s sitting in an account with no link to the mortgage at all. Only balances in the specific linked offset account count.
Is Your Salary Landing in the Offset?
If your pay goes into a different account and gets transferred later, or not at all, you’re losing days or weeks of offset benefit on that money every pay cycle. Consider whether your salary can be paid directly into the offset account.
Redraw Isn’t the Same as Offset
Redraw facilities and offset accounts can look similar from the outside but work differently and have different tax and flexibility implications. If you’ve been assuming extra repayments sitting in redraw are doing the same job as an offset, it’s worth understanding the distinction for your specific loan.
Is the Whole Loan Covered, or Just One Split?
If your loan is split (for example, part fixed and part variable), your offset may only be linked to one portion. Money in the offset won’t reduce interest on a part of the loan it isn’t attached to.
How Loanworx Can Help
We don’t provide tax advice, and how your specific offset arrangement is taxed can depend on your circumstances. What we can do is check whether your offset is actually structured and linked the way you think it is, review whether your current loan structure is still working for you, and help you get it fixed with your lender if something isn’t right.
Frequently Asked Questions
1. How much interest can an offset account actually save me?
It depends entirely on your loan balance, interest rate and how much sits in the offset over time, since interest is calculated daily on your loan balance minus your offset balance. Even modest balances add up meaningfully over the life of a loan.
2. Do I pay tax on the money in my offset account?
No interest is earned on the money itself, so there’s generally no taxable interest income to declare, unlike a standard savings account. Confirm your specific tax treatment with your accountant if you’re unsure.
3. How do I check if my offset account is properly linked?
Look at your home loan statement for a line item showing the offset balance netted against your loan balance. If you can’t find it, contact your lender and ask them to confirm the account is linked.
4. Is redraw the same as an offset account?
No. They can achieve a similar practical effect but work differently, including for tax purposes on investment properties, so it’s worth understanding which one applies to your loan.
5. What if my loan is split between fixed and variable?
Your offset account is usually only linked to one part of a split loan, most commonly the variable portion. Check with your lender to confirm which part of your loan your offset is actually attached to.
This article is general information only and does not take your objectives, financial situation or needs into account, and it is not tax or financial advice. Offset account structures, tax treatment and lender practices vary and can change over time. Always confirm your specific arrangement with your lender or accountant.
