Key takeaways
- An offset account is a transaction account linked to your home loan. Its balance reduces the part of the loan that is charged interest.
- It works like an everyday account, so your money stays accessible while it can reduce interest.
- The benefit depends on your balance and how long it stays there, and some loans charge for the feature through a higher rate, package fees or both.
- Offset, redraw and extra repayments are different tools, and the right one depends on your goals and, for investors, your tax position.
What Is an Offset Account? Offset Account Meaning and Definition
The offset account definition is straightforward. It is a transaction account that is linked to your home loan, and the money in it is used to reduce the amount of the loan on which you are charged interest. ASIC's MoneySmart describes a mortgage offset account as a transaction account linked to your home loan that is generally available with a variable rate home loan.
The offset account meaning is easiest to see with a simple picture. Say you owe $750,000 and hold $50,000 in the linked account. MoneySmart's own example says you would be charged interest on $700,000 rather than $750,000. You have not paid the $50,000 onto the loan, so it is still your money, but for interest purposes it is netted off against what you owe. Over time this can mean more of each repayment goes to the loan rather than interest, which can help you pay the loan off sooner and reduce the total interest you pay.
People often search for a “loan offset account” or an “offset mortgage account”, and they all mean the same feature. In this guide we cover how it works, a worked example, what it can cost, and when other options may suit better. The source for the definitions above is ASIC MoneySmart: mortgage offset accounts.
How Does an Offset Account Work Day to Day?
So, how does an offset account work in practice? According to MoneySmart, it behaves like an everyday bank account. You can have your salary paid into it, pay bills and set up direct debits from it, and use a debit card with it. The difference is behind the scenes. Interest on most home loans is calculated daily, and each day your lender subtracts your offset balance from your loan balance before calculating the interest charge.
That daily detail matters. The savings come from how large the balance is and how long it stays there, not just from the number on the day you check it. A salary that lands on the first of the month and is spent gradually will offset more interest than money that sits for a day and goes straight out again.
What it does not do
- It does not pay down your loan. Your loan balance stays the same, it is just charged interest on less.
- It does not guarantee a saving. If the balance is small or the loan costs more because of the feature, the benefit can be limited.
- It does not suit every loan. A mortgage with offset account features is generally linked to variable rate products, so ask what your chosen provider offers.
Worked Example: What an Offset Mortgage Account Might Save
Hypothetical numbers only. The figures below are round numbers chosen to make the maths easy. They are not a real rate, a loan offer or a forecast, and your own result will differ.
| Scenario | Balance charged interest | Approx. interest for a year |
|---|---|---|
| No offset balance | $600,000 | $36,000 |
| $30,000 held in offset all year | $570,000 | $34,200 |
| Difference | $30,000 | About $1,800 |
In this simplified picture, $30,000 multiplied by the illustrative 6% gives roughly $1,800 less interest over a year. If the lender charged an extra annual fee or a higher rate to include the offset feature, that cost would come off the benefit. If the balance averaged $10,000 instead of $30,000, the difference would be about one third of the figure above. For reference, MoneySmart publishes its own mortgage calculator, and the Mortgagefy home loan calculators let you model repayments with your own figures.
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Offset Account Calculator: Try Your Own Numbers
If you want to test your own situation, use the tool below. It works as a simple offset account calculator and offset account home loan calculator in one: enter your loan amount, rate, average offset balance and term to see the estimated interest effect. If you are searching for a mortgage calculator with offset account inputs elsewhere, check that it lets you set an average balance, because a calculator that assumes the balance never changes can overstate the benefit.
Simple offset account calculator
Illustrative only. This tool uses the numbers you type in, assumes a variable rate that stays the same and a fixed monthly repayment, and ignores fees, rate changes and tax. It is not a loan offer, a quote or advice.
For a wider view, the Mortgagefy calculators page covers repayments, borrowing power and more, and our refinance guide explains how loan features and costs are compared when you switch.
Offset vs Redraw vs Extra Repayments: A Quick Comparison
MoneySmart explains the difference simply. An offset account is a separate transaction account linked to your mortgage, and your savings reduce the amount of the loan charged interest. A redraw facility holds extra payments you have made onto the loan, and you may be able to withdraw them, with how and when depending on your loan terms. Extra repayments reduce the loan itself. This table is qualitative and general, so loan terms vary.
| Feature | Offset account | Redraw facility | Extra repayments |
|---|---|---|---|
| Where the money sits | In a linked transaction account | Paid onto the loan | Paid onto the loan |
| Effect on interest | Balance reduces the amount charged interest | Reduces the loan balance | Reduces the loan balance |
| Access to the money | Usually everyday access | Depends on loan terms and any conditions | Usually not accessible unless a redraw exists |
| Possible cost | Higher rate or package fee on some loans | Fees or limits on some loans | May be limits on fixed rate loans |
| Investment property note | Keeps the loan balance unchanged | Redrawing for private use can affect deductibility (see tax section) | Reduces the loan balance |
We unpack each pairing in more depth in our related guides: offset account vs redraw facility, offset account vs extra repayments, and how redraw works.
Term Deposit vs Offset Account for Your Savings
The term deposit vs offset account question comes up when you have a lump sum and want to decide where to keep it. A term deposit pays you interest and normally locks the money for a set time. An offset keeps your cash available and reduces the interest charged on the loan. The comparison depends on the rate you would earn, the rate on your loan, any tax on interest earned and how soon you might need the money.
Because these numbers change and depend on your tax position, we do not quote rates here. Ask your accountant how interest earned on savings would be treated for you, and compare that with the loan rate and any fees on the offset feature before you decide.
Who an Offset Account May Suit, and Who It May Not
MoneySmart says an offset account may be worth it if you have a large loan, keep a regular savings balance and want flexible access to your money. It may not be worth it if you usually keep a low balance, the loan has higher fees to include an offset feature, or the interest rate is higher than similar loans without one.
It may suit you if
- your salary and savings regularly sit in your account for weeks at a time
- you are building a deposit for another purchase, a renovation or an emergency buffer
- you are a self-employed borrower holding money aside for tax, where an offset can keep the funds accessible while reducing interest. See our self-employed home loan guide for how lenders assess that situation
It may not suit you if
- your balance is usually low and the loan costs more because of the feature
- you would rather lock in a fixed rate where an offset may not be fully available
- you are likely to spend the balance, so it rarely reduces the loan interest
If you are buying your first home, our first home buyer page covers how to compare features alongside deposit and cost questions.
Costs and Fees on Home Loans With Offset Accounts
When you compare home loans with offset accounts, look at the whole cost, not just the headline feature. MoneySmart suggests checking whether the interest rate would be lower without an offset-eligible loan, any annual or package fees, any monthly fees for the offset account, and how the loan compares with a redraw facility. Some lenders charge for offset features through higher interest rates, account fees, or both, and the amounts vary by lender and product.
- Package or annual fees. Some loans bundle an offset with other features for a yearly fee. Whether it is worth it depends on your balance.
- Rate premium. A loan with an offset may carry a different rate from a basic loan. The gap varies.
- Account fees. Check for monthly or transaction fees on the linked account.
- Partial or full offset. Some arrangements offset only part of the balance, so confirm which applies.
Your broker can compare these costs across lenders for you. It is also worth running the numbers with a repayment calculator before committing.
Offset Accounts and Tax: What Investors Should Check
We do not give tax advice, and we have not verified a general statement about whether interest you save is treated as income, so ask your accountant how it applies to you. What we can point to is the Australian Taxation Office guidance on rental property interest. The ATO states that you can claim interest expenses on the loan used to buy a rental property, but you cannot claim a deduction for additional payments made to reduce the principal amount of the loan. It also sets out that if redrawn funds are used for private purposes, the deductible portion of the interest on the loan has to be apportioned. Read the ATO guidance on rental property interest expenses (page last updated 21 May 2026).
In practice, this is why investors are often told to speak to an accountant before choosing between an offset account and a redraw facility. Structure matters, so get tailored tax advice before you change how your investment loan is set up. Our investment property loan page covers the lending side.
Check Your Offset Account Is Linked Properly
MoneySmart carries a warning on this. An ASIC review found customers may have been paying more interest than they should because some banks failed to properly manage offset accounts. If an offset account is not linked properly, the money in it might not be taken into account when interest is calculated, and because repayments stay the same, the problem can go unnoticed. MoneySmart's suggested actions are to check the link through your bank's app, online banking or statements, ask your bank if you cannot see the interest savings, check whether the offset needs re-linking after a refinance or product switch, and act quickly if something looks wrong.
That last point matters if you are thinking of switching loans. Refinancing can break the link, so confirm it is working after any change. The refinance page explains how we help borrowers compare loans and costs.
Offset Account FAQs
What is an offset account?
An offset account is a transaction account linked to your home loan. The balance in it is subtracted from your loan balance when interest is calculated, so you are charged interest on a smaller amount. Features and fees vary by lender and loan.
How does an offset account work?
Your salary and savings sit in the linked account and you use it like an everyday account. Interest on most home loans is calculated daily, so each day the lender subtracts your offset balance from your loan balance before working out the interest charge. The higher the balance and the longer it stays there, the greater the potential saving.
What is the offset account meaning in simple terms?
The offset account meaning is simple: money you hold in the linked account offsets, or cancels out, part of the loan for interest purposes. You still own the money and can generally access it, but it is not paid onto the loan.
Can I use an offset account calculator to see my savings?
Yes. An offset account calculator, or any mortgage calculator with offset account inputs, can estimate the interest effect of a given balance. The calculator on this page is illustrative only and is not a loan offer. ASIC MoneySmart also publishes a mortgage calculator.
Is a loan offset account worth the extra cost?
It depends on your balance, your loan size and what the lender charges. Some lenders recover the cost of an offset feature through a higher interest rate, an annual or package fee, or both. Compare the fees with the interest you realistically expect to save.
Are there home loans with offset accounts for fixed rates?
Offset accounts are generally available with variable rate loans. Whether a lender offers a full or partial offset on a fixed rate loan varies, so ask your broker to check the loan terms before you apply.
Is a term deposit or an offset account better for my savings?
They work differently. A term deposit pays you interest and usually locks the money for a set period. An offset reduces the interest on your loan and the money stays accessible. Which suits you depends on your rates, your tax position and how soon you may need the cash, so speak to your broker and accountant.
Information checked on 1 October 2026 against ASIC MoneySmart (page last updated 28 July 2026) and the ATO (page last updated 21 May 2026). Policies and lender offerings may change. Confirm offset features, fees and any rate difference directly with your chosen provider before applying. This information is general in nature and does not take your objectives, financial situation or needs into account. Policies vary by lender and change frequently — confirm current requirements with your chosen provider and seek professional advice, including tax advice from an accountant.
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