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Why ASIC thinks offset accounts are a bit…off

September 6, 2025

As you’re hopefully aware by now, the federal government’s Home Guarantee Scheme allows first home buyers to avoid paying Lenders Mortgage Insurance (LMI). What you may not be aware of is what that saving can translate to in dollar terms to a purchaser, so let’s break it down for you.

Take a $950,000 purchase as an example. Normally, a borrower with just a 5% deposit ($47,500) would face an LMI bill of around $45,000–$55,000. Even with a 10% deposit, LMI could still add $25,000–$30,000, and at 15%, you’re often looking at another $12,000–$15,000 on top of a loan.

On the example above, the saving could be worth up to $55,000, leaving more money in the buyer’s pocket for furnishing their new home, covering moving costs, or simply reducing the size of your mortgage.

For first home buyers especially, avoiding LMI isn’t just a boost, it can be the difference between waiting years to save or getting the keys to their first home much sooner.

In this week’s newsletter, we look at mortgage offset accounts and why ASIC is concerned about them.

What Is a Mortgage Offset Account (In Plain English)?

Think of a mortgage offset account as your home loan’s superhero sidekick. It’s a savings or transaction account linked to your mortgage. Instead of earning interest like a normal savings account, the cash you stash in your offset reduces the amount of your loan that incurs interest.

Example:

If your home loan balance is $300,000 but you have $50,000 in your offset, you’ll only be charged interest on $250,000.

This “offset magic” means you pay off your home loan faster, save on interest, and retain access to your money anytime.

Why It’s Useful for Borrowers

  • Lower interest bills without giving up liquidity
  • Faster mortgage payoff thanks to reduced principal interest
  • Extra flexibility, deposit or spend as needed—easy access, big impact

So, What’s the Problem? Why Is ASIC Investigating Offset Accounts?

You’d expect this to be a no‑brainer financial win—but the Australian Securities and Investments Commission (ASIC) is now probing whether banks are doing it properly.

  • ASIC suspects some borrowers haven’t been receiving the full benefit—because their offset accounts weren’t correctly linked to the mortgage. That means their savings haven’t actually been offsetting the loan balance.
  • It’s a big issue—there’s around $300 billion sitting in offset accounts across Australia. So even a small error could cost households thousands.
  • ASIC is now monitoring eight banks (including some of the big four) and warns refunds could be on the way if customers have been disadvantaged.

This isn’t ASIC’s first rodeo — similar mistakes in the past have led to multi‑million dollar refunds and court actions (like with NAB and Bankwest) when offset accounts didn’t function as advertised.

In Short

Mortgage offset accounts can be a powerful way to save on interest and pay off your home loan sooner—but only if everything is rigged properly. As ASIC shines its spotlight, if you have an offset account, make sure your account is working as hard as you are.

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The rates below are based on a $500,000 loan, with the borrower making principle and interest payments with a loan term of 30 years. The rates quoted may vary depending on the borrowers LVR.

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The rates below are based on a $500,000 loan, with the borrower making principle and interest payments with a loan term of 30 years. The rates quoted may vary depending on the borrowers LVR. At the end of the three year fixed period, the borrowers interest rate will revert to a standard variable rate for the life of the loan.

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