10 IT Security Mistakes That Could Cost Your Business

Most security incidents affecting small businesses aren't the result of sophisticated attacks. They happen because of simple, avoidable mistakes. Here are the ten we see most often — and what to do about each one.

1. Reusing Passwords Across Accounts

When one service is breached, criminals try the same email and password combination everywhere else. A password manager makes unique passwords effortless for your whole team.

2. Skipping Multi-Factor Authentication

MFA is the single most effective control against account takeover. Enable it on email, banking, and any system holding customer data — starting with administrator accounts.

3. Delaying Software Updates

Updates patch the security holes criminals actively exploit. Turn on automatic updates for operating systems, browsers and business applications wherever possible.

4. No Tested Backups

A backup you've never restored from is a hope, not a plan. Follow the 3-2-1 rule: three copies of your data, on two different types of storage, with one kept off-site — and test restores regularly.

5. Giving Everyone Admin Rights

The more accounts with administrator access, the bigger the impact when one is compromised. Give people the minimum access they need to do their job.

6. Ignoring Staff Training

Phishing remains the most common way into a business. Short, regular awareness sessions do more than an annual tick-box exercise.

7. Unsecured Wi-Fi and Remote Access

Default router passwords, open guest networks and exposed remote desktop connections are open doors. Segment guest Wi-Fi, use strong VPN access and close ports you don't need.

8. No Plan for Leavers

Former employees who keep working logins are a serious risk. Have a checklist to revoke access, recover devices and rotate shared credentials on day one.

9. Missing Email Authentication

Without SPF, DKIM and DMARC configured on your domain, criminals can send emails pretending to be your business. Proper email authentication protects your customers and your reputation.

10. Assuming "We're Too Small to Be a Target"

Automated attacks don't check company size. Small businesses are often targeted precisely because their defences are weaker. The good news: fixing the basics above stops the vast majority of attacks.

How Altitude IT Can Help

We help small businesses close these gaps with a practical, plain-English approach — from security assessments and staff training to email authentication and backup strategies. Talk to us about a security review of your current setup.