Running an online business in the UK means handling customer payments, personal data and supplier details across websites, cloud apps and mobile devices. That digital footprint also makes you a target. According to the UK government’s Cyber Security Breaches Survey 2024, half of all UK businesses identified at least one cyber security breach or attack in the previous 12 months. For medium and large businesses the figure rose to 70% and 74% respectively. Yet only 22% of businesses had a formal cyber security incident response plan. If you want to protect your revenue, reputation and customer trust, online business security is not optional. Here are five practical steps every UK woman running an online business should take.

Understand why online business security matters now

Cyber attacks are not just a problem for banks and multinationals. The Cyber Security Breaches Survey 2024, published by the Department for Science, Innovation and Technology, found that the average cost of a cyber breach for UK businesses was £1,205 overall, rising to £10,830 for medium and large businesses. Ransomware, phishing and stolen credentials can shut down websites, freeze payments and damage the trust you have built with customers. For women founders running lean operations, a single incident can wipe out weeks of income. See Women in Business: Key UK Facts for the latest statistics on women’s enterprise in the UK.

1. Certify to Cyber Essentials

The government’s Cyber Essentials scheme, administered by IASME and backed by the National Cyber Security Centre, sets out five technical controls that block the most common internet-based attacks. These include secure configuration, boundary firewalls, access control, malware protection and patch management. For most small businesses, self-assessment certification starts at around £320 plus VAT. The certificate also demonstrates to clients, insurers and public-sector buyers that you take security seriously, and some cyber insurance providers offer reduced premiums to certified organisations.

Action: visit the IASME Cyber Essentials website, complete the self-assessment questionnaire, and fix any failures before submitting. If you bid for public-sector contracts, Cyber Essentials is often mandatory.

2. Control who can access your systems

Weak or reused passwords remain one of the easiest ways for attackers to enter a business network. The National Cyber Security Centre recommends using three random words to create memorable but strong passwords, combined with a password manager. Wherever possible, turn on multi-factor authentication for email, banking, cloud storage, accounting software and any platform holding customer data.

If you employ staff or use freelancers, give each person their own login and only the permissions they need. Remove access immediately when someone leaves. Since 2025, Companies House has required all directors, including women running limited companies, to verify their identity. Keeping your director identity verification up to date is part of keeping your business records secure. Read our guide on Companies House Identity Verification: What Every Female Director Must Do Now.

3. Back up and encrypt your data

Ransomware can lock you out of your own files. For women-led online retailers and service providers, even a few days offline can wipe out a month’s profit. Without a tested backup, you may have no choice but to pay a ransom or rebuild from scratch.

Follow the 3-2-1 rule: keep three copies of important data, on two different media types, with one copy stored off-site or in a separate cloud account. Encrypt sensitive files before uploading them, and test your backups regularly to make sure you can actually restore them. If you handle personal data, encryption also helps you meet your UK GDPR accountability obligations.

4. Patch software and devices automatically

Women founders often run lean tech setups, so every device matters. Developers release updates to fix security flaws, not just to add features. The WannaCry attack in 2017 showed how unpatched systems can bring organisations to a standstill. Set all company devices, including phones, laptops, routers and payment terminals, to install security updates automatically. If you use a website built on WordPress, Shopify or another platform, enable automatic plugin and theme updates where available, and remove any plugins you no longer use.

Action: create a simple asset list of every device, app and website account your business uses, then check that each one is set to auto-update or is reviewed weekly.

5. Train your people to recognise attacks

Phishing remains the most common attack type reported by UK businesses. The Cyber Security Breaches Survey 2024 reported that 84% of businesses that suffered a breach identified phishing as the cause. Attackers often impersonate HMRC, banks, suppliers or even colleagues to trick people into clicking malicious links or transferring money.

Women-led teams, especially if remote or part-time, need clear security guidance. Make security awareness part of onboarding and repeat it quarterly. Cover how to spot suspicious emails, why to verify payment requests by phone, and what to do if someone clicks a bad link. The National Cyber Security Centre’s Exercise in a Box provides free scenarios to test your team’s response. For more remote-working guidance, see our article on How to Secure Your Remote Work Environment in 2026.

What to do if you are attacked

Even with strong controls, breaches can happen. For women founders, a clear incident plan can prevent a bad day from becoming a business-ending crisis. Have a short incident plan that includes: who to contact first, how to isolate affected devices, how to report a data breach to the ICO within 72 hours if personal data is involved, and how to communicate with customers. The Information Commissioner’s Office can fine organisations up to £17.5 million or 4% of global annual turnover for the most serious UK GDPR breaches. Most data controllers must also pay the ICO data protection fee, which starts at £40 per year for small organisations.

Take these five steps this week

• Register for and complete Cyber Essentials certification through IASME.
• Turn on multi-factor authentication for every business account that supports it.
• Set up automated backups and test a restore this month.
• Enable automatic updates on all devices and websites.
• Run a short phishing awareness session with your team.

Online business security is about protecting the money, time and trust you have built. By certifying to Cyber Essentials, controlling access, backing up data, patching systems and training your people, you put your UK business in a much stronger position. Start with one action this week, and add the rest before the end of the month. For further guidance, see the National Cyber Security Centre Small Business Guide.