Financial services now have the most expensive breaches in Australia: what the 2026 numbers mean

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Every year, IBM’s Cost of a Data Breach Report gives Australian businesses a clear benchmark for what a security incident costs. It’s one of the few studies of its kind that lets organisations compare their own exposure against a large, consistent global dataset year after year.
The 2026 edition, published on 31 July 2026, examined breaches experienced by 602 organisations globally between March 2025 and February 2026. As in previous years, the report breaks these findings down by industry and region, giving a picture of how different sectors are faring against the same threats. Buried in the Australian results are several findings financial services leaders can’t afford to overlook.
The numbers
The average cost of a data breach in Australia has risen toAUD $4.22 million, up 38 per cent since 2019.
Financial services recorded the highest average breach cost of any sector in the country, at AUD $6.31 million per incident (IBM, 2026). It is now the most expensive sector in Australia to experience a breach, ahead of every other industry IBM measured this year.
It helps to understand what that figure represents, because it is easy to read it as a single dramatic event and move on, however, it isn’t one. It is an average, built up from incident response, forensic investigation, regulatory notification, lost business and the time it takes a Financial Services firm to identify and contain an issue once it has started.
For a sector that holds sensitive client information and moves money for a living, each of those components tends to run longer and cost more, and the total adds up quickly.
A trend, not a spike
The cost figure lines up with what’s happening on the reporting side too. The Office of the Australian Information Commissioner received1,205 data breach notifications in 2025, the highest number since the Notifiable Data Breaches scheme began in 2018, and an 8 per cent increase on the 1,112 notifications recorded in 2024 (OAIC, 2026). A consistent picture can be seen when you read the two data points together.
Breaches are being reported more often across the board, and when they land in financial services, they cost more to resolve than anywhere else.
None of this means Financial Services firms are doing something wrong, it reflects the nature of the work being completed. Businesses in this sector hold information and manage transactions, so a breach is not just costly to put right, it also comes with strict reporting obligations to regulators.

Where the value sits
What the figure highlights is the value of preparation before an incident, not after one. The businesses that survive a breach with less damage rarely do so by chance. They usually have a plan that was written and tested well before it was needed, so the first hour of an incident is spent executing it rather than working out where to start.”
Picture two businesses hit by a similar incident on the same day. One already knows who gets notified, in what order, and what the client message says, before anyone’s written a word of it. The other is figuring all of that out for the first time, with the clock already running. That gap, in cost and in client trust, is most of what this report is measuring.
Closing that gap doesn’t call for a finished plan overnight, and it doesn’t need to be perfect on the first attempt, it just needs to exist before it’s tested for real.
How can we help you?
Join us for a Cyber Webinar Series where we unpack practically how you can learn and discover how to not only protect your environment, but who has access to it and what information they have access to.
More information is found here:
https://danet.com.au/webinar-series-three-cyber-security-questions-every-business-owner-has-to-answer/
If you’d like to talk through what this means for your business, contact us.
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Sources
OAIC, Data breach notifications increase to all-time high in 2025, new NDB stats show (published 6 July 2026): https://www.oaic.gov.au/news/media-centre/data-breach-notifications-increase-to-all-time-high-in-2025,-new-ndb-stats-show
IBM, Cost of a Data Breach Report 2026: https://www.ibm.com/reports/data-breach