If you run a small business, it is easy to assume cyberattacks are mainly a problem for large organisations. In reality, small businesses are increasingly targeted because attackers know security is often lighter, while business and customer data, may still be valuable.
Data security is no longer optional. It is part of running a professional, modern business.
What high profile data breaches have shown us
Some of the most well known data breaches in recent years, provide an important lesson for businesses of all sizes.
The Optus data breach exposed the personal information of millions of customers, including names, dates of birth and identification numbers. Not long after, Medibank confirmed a major cyberattack that resulted in sensitive health data being stolen and later released publicly. These incidents had a significant impact on customer trust and resulted in ongoing financial and legal consequences.
These organisations had large budgets and dedicated security teams. The takeaway for small business owners is simple. Cybercriminals look for weaknesses, wherever they exist.
The impact on small businesses
For a small business, a data breach can be overwhelming. The average cost of cybercrime on small businesses jumped 14 per cent to $56,600 in 2024-25.i Financial costs can include system repairs, professional support, lost sales and potential penalties. Even more damaging, can be the loss of customer confidence.
There is also the emotional and operational toll. Responding to a cyber incident takes time, focus and energy, often pulling attention away from customers and daily operations when you can least afford it.
Protecting your business data
Good data security starts with knowing what information your business holds. Many businesses collect data over time and forget it exists. The more data you store, the more attractive a target you become to cyber attackers.
Here are some ways to protect your business:
Limit access – Only give access to people who genuinely need it. If staff don’t need to see certain customer data, don’t let them.
Use strong, unique passwords – Passwords should be hard to guess and not reused across accounts. Consider using a password manager to make this easier.
Keep systems updated – Software and devices should always be up to date. Many attacks exploit old software with known vulnerabilities.
Encrypt sensitive data – Data stored on computers, cloud systems, or sent over the internet should be encrypted. Even if stolen, encrypted data is much harder to misuse.
Back up regularly – Make regular backups of important business and customer data. Keep copies separate from your main systems so ransomware or accidental loss doesn’t affect everything.
Secure devices and networks – Use firewalls, anti-virus software, and secure Wi-Fi. If employees use personal devices, make sure they follow security guidelines.
Be aware of phishing and scams – Many breaches start with someone clicking a link or opening an infected email. Training staff and staying alert can prevent most incidents.
Looking after your customers’ personal information
Customer data deserves special care. This includes contact details, payment information and any data that could identify an individual.
A practical approach is to only collect information you genuinely need and delete it when it is no longer required. Holding onto customer data indefinitely increases your risk without any business benefit.
Access to customer information should be restricted and monitored. If staff work remotely, or use personal devices, clear expectations around security help protect your business and your customers.
Being ready if something goes wrong
Even with sensible protections in place, no system is perfect. Having a basic response plan can make a huge difference if a data breach occurs.
Knowing how to identify a breach, who to contact, and how to communicate with customers helps reduce confusion and damage. A data breach must be reported to the Office of the Australian Information Commissioner (OAIC) and to the individuals affected if personal information is lost, stolen, or disclosed without authorisation and it is likely to cause serious harm to anyone affected.
Moving forward with confidence
Data security does not have to be complicated or expensive. Small, consistent steps can greatly reduce your exposure to risk. Understanding your data, limiting access, maintaining systems and backing up regularly will put you ahead of many businesses your size.
At a time when data breaches regularly make headlines, showing customers that you take their information seriously, can become a real competitive advantage.
i https://www.cyber.gov.au/sites/default/files/2025-10/Annual%20Cyber%20Threat%20Report%202024-25.pdf
