Offset Account – What Is It and How Does It Work?

You've been making your home loan repayments every month, but when you check your mortgage balance, it doesn't seem to be dropping as quickly as you'd hoped. A large portion of each repayment is still going towards interest, particularly during the earlier years of your loan.

This is where an offset account might be worth considering.

It's a feature that allows you to use your savings to reduce the interest charged on your mortgage, without actually paying those savings into the loan. Your money remains accessible for everyday expenses, emergencies or other plans.

According to ASIC, Australians held approximately $349.1 billion in mortgage offset accounts as at March 2026. Clearly, it's a feature plenty of borrowers are using. But whether it's worthwhile for you depends on your loan, savings and spending habits.

What Is an Offset Account?

An offset account is a transaction account linked to your home loan. It works much like a regular bank account, allowing you to deposit your salary, transfer money, pay bills and, depending on the product, make purchases using a debit card.

The difference is that the money sitting in this account reduces the portion of your mortgage on which interest is calculated.

Let's say you have a $600,000 home loan and $40,000 in a 100% offset account. Rather than calculating interest on $600,000, your lender calculates it on $560,000.

You still owe $600,000, less any repayments you've made. The $40,000 remains yours to access whenever you need it.

Most offset accounts are linked to variable-rate home loans, although some lenders offer offset features on certain fixed-rate products.

Also Read - Why Every Homeowner Needs a Home Loan Review This Year

How Does an Offset Account Work?

Australian lenders generally calculate home loan interest daily, even though it's usually charged monthly. This means your offset balance can make a difference every day.

Suppose your outstanding mortgage is $500,000 at an assumed interest rate of 6% per annum. Here's how much interest you could save by maintaining different balances in a 100% offset account.

Offset balance	Approximate annual interest saving
$10,000	$600
$20,000	$1,200
$40,000	$2,400
$60,000	$3,600

These simplified figures assume the offset balance and interest rate remain constant for one year. They exclude fees and changes in loan balances.

Your savings won't necessarily remain the same throughout the month, and that's fine. For instance, your salary might arrive on Thursday, increasing your offset balance by $5,000. Over the following fortnight, groceries, bills and other expenses gradually reduce it.

The lender calculates interest using the eligible offset balance each day, so even money that stays in the account temporarily can contribute to savings.

How Does an Offset Account Help You Pay Off Your Mortgage Sooner?

One benefit that borrowers sometimes overlook is what happens to their regular repayments.

With a standard principal-and-interest mortgage, each repayment covers interest and reduces part of the amount borrowed.

When your offset account reduces the interest charged, more of your scheduled repayment can go towards reducing the principal, assuming your repayments remain unchanged.

Over several years, this can make a meaningful difference to your outstanding balance and potentially shorten your loan term.

However, an offset account doesn't automatically reduce your required monthly repayment. Your lender's repayment arrangements determine whether that amount changes.

Also Read - How Home Loans for Doctors Can Bypass LMI Costs Entirely

What's the Difference Between an Offset Account and Redraw?

Both features can help reduce mortgage interest, but there's an important difference in where your money sits.

With an offset account, your savings remain in a separate transaction account linked to the mortgage. You can generally access the money through everyday banking.

A redraw facility allows you to withdraw eligible additional repayments you've already made towards your home loan. Access is subject to the lender's terms and conditions.

For borrowers who want to keep an emergency fund readily available, an offset account may offer greater convenience.

Redraw can still be useful, particularly if you prefer making extra mortgage repayments and don't need regular access to those funds.

Are There Any Costs or Disadvantages?

An offset account isn't automatically the cheapest option. Some lenders charge annual package fees, monthly account fees or a higher interest rate for loans that include an offset facility.

Imagine you're keeping an average of $10,000 in your offset account. At 6% interest, that could save approximately $600 annually. If the account costs an additional $395 per year, your saving falls to around $205 before considering any difference in the loan's interest rate.

That's why we recommend comparing the entire loan rather than choosing a product simply because it offers an offset account.

You'll also need to check whether the account provides a 100% offset or a partial offset, where only a portion of your savings reduces the interest-bearing balance.

Also Read - How to Actually Claim the First Home Owner Grant in 2026

Can You Use an Offset Account for an Investment Property?

Yes, and this is an area where loan structure deserves additional attention. An offset account can be particularly useful for investors who want to maintain access to their cash while reducing interest on an investment mortgage. There's also a potential tax consideration.

If you withdraw additional repayments through redraw and use those funds for personal purposes, the deductibility of interest on that portion of an investment loan may be affected.

Withdrawing your own savings from a genuine offset account generally doesn't change the original loan's purpose, although the interest charged may increase as the offset balance falls.

We encourage investors to speak with a qualified tax adviser before changing their loan arrangements. Working with an Investment Property Mortgage Broker can also help you understand the lending features and structures available for your circumstances.

Who Should Consider an Offset Account?

An offset account may be useful if you regularly maintain savings, receive a consistent income or want access to funds for unexpected expenses. For first-home buyers, it can provide somewhere to rebuild savings after settlement while reducing mortgage interest.

An experienced First Home Buyers Broker can help you compare loans with and without offset facilities, particularly when your savings balance is likely to be modest initially.

For investors, an Investment Mortgage Broker in Melbourne can help compare suitable investment loan options, including their rates, fees and offset arrangements.

If you rarely maintain much money in your account, however, a lower-cost mortgage without an offset could be more economical.

Make Your Mortgage Work Harder with Loanstudio

An offset account can help you reduce mortgage interest without giving up access to your savings. Whether it's worthwhile comes down to how much money you keep in the account, what the feature costs and how your home loan is structured.

At Loanstudio, we help first-home buyers, homeowners and property investors compare lending options and understand how different loan features affect their finances.

We'll look at your borrowing needs, savings habits and future plans before helping you explore suitable home loans.

Want to know whether an offset account makes sense for your mortgage? Speak with our team at Loanstudio today, and let's work through your options together.