Offset accounts, explained without the banking fog.
An offset account can reduce the amount of your home loan that gets charged interest while keeping your money available like an everyday account. Useful? Very. Automatically the best option? Not always.
The simple version
What is an offset account?
An offset account is a transaction account linked to an eligible home loan. Instead of earning interest on the money in that account, the balance is used to reduce the portion of your home loan on which interest is calculated.
You can generally use the account much like an everyday bank account — salary in, bills out, debit card purchases and transfers — while the money sitting there is working in the background against your mortgage interest.
An actual example
What happens to the interest calculation?
Suppose your home loan balance is $500,000 and you keep $20,000 in a 100% offset account.
The important bit: your loan has not suddenly become a $480,000 loan. The loan balance is still $500,000. The offset changes the amount used to calculate interest while the money remains in the linked account.
Offset vs redraw
They can look similar on a calculator. They are not the same thing.
Both can reduce interest, but the money sits in a different place and that can matter later.
Your money stays in a separate account
Your loan balance remains unchanged. Your deposit balance reduces the amount of the loan used for the interest calculation while the money is in the offset.
- Separate transaction/deposit account
- Usually easy everyday access
- Can receive salary and pay bills
- Cash remains separate from the loan
Your extra repayment goes into the loan
Extra repayments reduce your outstanding loan debt. Your lender may then allow you to access some of those additional repayments later under the loan's redraw rules.
- Money has reduced the loan principal
- Access depends on lender and loan rules
- Redrawing increases the outstanding debt again
- Tax treatment can differ depending on what redrawn money is used for
Planning to turn your home into an investment later? This is one of the times the offset-versus-redraw distinction can become particularly important. The ATO treats money redrawn from a loan as new borrowing, and the use of those redrawn funds can affect interest deductibility. Get tax advice before restructuring debt for tax purposes.
Why people like them
An offset is really a cash-management tool wearing a home-loan badge
Pay less mortgage interest
The more eligible money you keep in the offset, the smaller the balance generally used for calculating home-loan interest.
Keep your cash accessible
Your emergency fund, salary and savings can remain available rather than being permanently locked away just to produce an interest benefit.
More repayment hits principal
If your scheduled repayment stays the same while interest falls, more of that repayment can go towards reducing the loan balance.
Your everyday balance can help
Money does not need to be labelled “savings” to work. Salary and bill money can contribute while it is sitting in the account.
Multiple accounts can make budgeting easier
Some lenders allow several offset accounts, so separate savings buckets can still contribute to the same loan's offset benefit.
Useful flexibility
For borrowers who value liquidity, an offset can reduce interest without requiring every spare dollar to be paid permanently into the mortgage.
But here is the catch
An offset is only useful if the numbers stack up
A home loan with an offset can come with a different interest rate or extra fees. A feature is not valuable just because the brochure gives it a shiny name.
Think in break-even terms. If an offset-compatible loan costs more in rates or fees, the likely interest saving from your average offset balance needs to be greater than that extra cost.
100% versus partial
“Has an offset” does not always mean every dollar counts
$50,000 in the account
If the product provides a genuine 100% offset, the full $50,000 can reduce the loan balance used for calculating interest, subject to the lender's terms.
$50,000 in the account
Only $25,000 would be counted towards the interest offset if the product offered a 50% offset benefit.
Good question for any lender: “Is this a 100% offset, and exactly which loan split does it offset?” That one sentence can save a surprising amount of confusion.
What if the offset equals the whole loan?
Fully offset does not mean the mortgage disappears
If you owe $300,000 and have $300,000 in an eligible 100% offset, the amount being charged interest may effectively fall to zero while those balances remain equal. But you still have a $300,000 loan and the loan contract still exists.
That can be useful for someone who wants to keep access to cash rather than paying the loan out immediately, but repayment rules, fees and product conditions still apply.
A little optimisation
Why people put their salary into the offset
Home-loan interest is commonly calculated using daily balances. So having your salary land in the offset means that money can start helping while it waits to be used for groceries, bills, school fees, weekends away and everything else adulthood keeps inventing.
Some people also put normal spending on a credit card and then pay the card in full by its due date so cash remains in the offset longer.
That credit-card strategy only works if the card is paid in full. Carrying expensive credit-card debt to squeeze a little more benefit out of a home-loan offset is the financial equivalent of driving across town to save three cents a litre.
Deposit protection
Is money in an offset still protected like money in a bank account?
Where a mortgage offset is a separate eligible deposit account with an Australian authorised deposit-taking institution, APRA says it can be covered by the Financial Claims Scheme.
The scheme generally protects eligible deposits up to $250,000 per account holder, per ADI. That limit is based on the underlying banking institution, not necessarily each brand name you see on an app or branch.
Offset and redraw differ here too. APRA says a separate mortgage offset deposit account can be covered under the Financial Claims Scheme, while additional loan repayments sitting as available redraw are not deposits under that scheme.
A very Australian mortgage feature
Offsets are not some obscure trick used by three spreadsheet enthusiasts
Reserve Bank of Australia research published in May 2026 reported that the share of housing loan facilities with an offset account had risen from around 40% to around 55% over the previous five years. Over the same period, the share with redraw facilities increased from around 70% to around 80%.
In other words: offset strategy now matters for a very large part of the Australian mortgage market.
Who should think harder about it?
Some borrowers get much more value from an offset than others
You keep meaningful cash savings
The larger your realistic average offset balance, the more potential interest benefit there is to compare against fees and rate differences.
You may keep today's home as an investment
Preserving cash separately from loan principal can become important when considering future debt structure and tax treatment.
You are considering a fixed/variable split
The amount left variable and eligible for offset should make sense compared with how much cash you expect to hold.
Questions people actually ask
Offset account FAQs
Does an offset account reduce my loan balance?
No. The money remains in a separate account. It reduces the amount of the linked loan used to calculate interest while the eligible funds remain there.
Do I earn interest on money in an offset account?
Generally, the point of a mortgage offset is that the account balance reduces mortgage interest rather than earning ordinary deposit interest. Check the terms of the particular product.
Is an offset account the same as redraw?
No. Offset money sits in a separate account. Redraw relates to extra repayments that have already reduced your loan and which the lender may permit you to access again.
Can I have more than one offset account?
Some lenders allow multiple offset accounts and others are more restrictive. Check how many can be linked and whether all linked balances receive the same offset treatment.
Can an offset account be linked to a fixed-rate loan?
Offsets are commonly associated with variable-rate loans. Some fixed-rate products do not permit them, which is one reason borrowers sometimes use a split loan structure. Product rules vary by lender.
Will having money in offset reduce my minimum repayment?
Not necessarily. The offset generally changes the amount of interest charged rather than automatically changing your contractual repayment. With a principal-and-interest loan, lower interest can mean more of the same repayment goes towards principal.
Is an offset always worth paying extra for?
No. Compare the likely interest saving with any higher loan rate, annual package fee, account fee or other cost. A low average offset balance may not justify an expensive offset-compatible product.
What if my home might become an investment property later?
That is a situation where loan structure can have future tax consequences. Redraws can constitute new borrowings for tax purposes and their use matters. Speak with your broker about the lending structure and obtain qualified tax advice about deductibility.
Want to know whether an offset actually makes sense for your loan?
We can compare the rate, fees, likely offset balance and the way you actually use your money. Because “this loan has an offset” is a feature list. “This structure saves you money” is the part that matters.
General information only. This page does not take into account your objectives, financial situation or needs. Lending criteria, rates, fees, product features and offset rules vary between lenders and can change. Tax outcomes depend on individual circumstances; obtain qualified tax advice where relevant.