Email sits at the heart of almost every business. It connects you to customers, suppliers, and your team. That is precisely why it has become the primary target for cyber criminals. Business email compromise, commonly referred to as BEC, is now the most widespread and damaging email threat facing businesses, and the numbers show it is getting worse.

Understanding what this threat looks like, and how to defend against it, is something every business owner needs to take seriously.

What Is Business Email Compromise?

Business email compromise is a type of fraud where attackers impersonate someone your employees already trust. That usually means a senior figure within the business, such as a director, the CEO, or a member of the IT team.

The goal is straightforward. The attacker sends an email that appears to come from this trusted person and uses that false authority to pressure a member of staff into taking an action. This might mean transferring money to an unfamiliar account, sharing login credentials, or providing sensitive business or client data.

Research shows that nearly nine in ten BEC attacks follow this same pattern of impersonating authority figures. It works because most employees do not naturally question a request that appears to come from someone senior. Particularly when that request is framed as urgent.

The urgency is deliberate. Attackers want the recipient to act quickly, before they have time to think or verify. A message that says “please transfer this payment immediately, I am in a meeting and cannot be disturbed” is designed to bypass caution entirely.

How Significant Is the Business Email Compromise Threat?

The scale of the problem has grown sharply. Analysis of 1.8 billion emails found over 200 million that were malicious. Of those malicious emails, more than half were classified as business email compromise attempts. That makes BEC the dominant form of email attack, ahead of phishing, spam, ransomware, and malware combined.

The rise in BEC attacks has been particularly steep in recent months. Businesses of all sizes and across all sectors have seen an increase, and the sophistication of the attacks has grown alongside the volume. Some attacks now use AI tools to mimic the writing style of the person being impersonated, making them harder to detect.

For smaller businesses, the risk is just as real as for larger organisations. In some ways it is greater, because smaller teams often have less formal approval processes and fewer security checks in place. A single successful attack can have a serious financial impact.

Who Do BEC Attackers Target Within Your Business?

Business email compromise attacks rarely target the most senior people in a business. Instead, they tend to focus on employees further down the structure, such as those in finance, accounts, or administration.

This makes sense from the attacker’s perspective. Someone in a junior role who receives an urgent request from the CEO is far less likely to push back or ask questions. They may feel they have no authority to query a request from a director, especially if it appears to come directly from them.

Similarly, newer employees are frequently targeted. They are less familiar with internal processes and may not yet know the normal patterns of communication well enough to recognise something unusual.

This is why training across the whole team matters, not just the most senior staff. The people most likely to be targeted are often those who receive the least security awareness training.

Business Email Compromise Is Not the Only Threat

While business email compromise dominates the threat landscape, it does not operate in isolation. Phishing attacks, which trick recipients into handing over login credentials or personal information, remain extremely common. Commercial spam continues to be a significant nuisance and occasional risk. Together, these email-based threats now overshadow more traditional forms of cyber attack such as ransomware and malware.

For businesses in East Grinstead and across Sussex, this means that email security needs to be a priority, not an afterthought. The sheer volume of malicious email traffic makes it statistically likely that your team will encounter an attempt at some point. What matters is whether your people and your systems are prepared when that moment arrives.

Our email security best practices guide covers the technical and human steps businesses can take to reduce their exposure.

How to Protect Your Business from BEC Attacks

The good news is that defending against business email compromise does not require expensive technology or complex systems. The most effective protection combines straightforward technical measures with clear human processes.

Start with staff awareness. Every member of your team who uses email, which is almost everyone, needs to understand how BEC attacks work. They need to know that a legitimate senior colleague will never pressure them to transfer money or share sensitive data without a proper approval process. Training does not need to be lengthy. Even a brief, regular reminder about what to look out for can make a significant difference.

Next, establish a simple verification process. Any request involving a financial transaction or the sharing of sensitive information should require a second form of confirmation. A quick phone call to verify the request is genuine takes less than a minute and can prevent a costly mistake.

On the technical side, multi-factor authentication adds a critical layer of protection to your email accounts. Even if an attacker obtains login credentials, they cannot access the account without the additional verification step. Our page on strengthening your business security explains how this works in practice.

Email filtering tools can also help by identifying and blocking suspicious messages before they reach your team. However, no filter catches everything, which is why human awareness remains the most important line of defence.

You can also read more about protecting your business on our cyber security page.

What This Means For Businesses

Business email compromise is not a theoretical risk. It is happening to businesses across the UK every week, and the financial consequences can be severe. A single fraudulent payment or data breach can cost thousands of pounds, damage client relationships, and in some cases carry regulatory implications.

The businesses most at risk are those that assume it will not happen to them, or that assume their email provider takes care of security automatically. Neither is a safe assumption. Email platforms provide a foundation, but the decisions made by your team are ultimately what determine whether an attack succeeds.

Building awareness, establishing clear processes, and layering in the right technical protections gives your business a genuinely strong defence. None of these steps requires significant investment, but collectively they close the gaps that attackers rely on.

If you are unsure whether your current email security is adequate, a managed IT support review can give you a clear and honest picture of where you stand.

Final Thoughts

Business email compromise has become the dominant form of cyber attack on businesses, and the trend is moving in the wrong direction. Attackers are becoming more prolific, more sophisticated, and more targeted in how they approach their victims.

The response does not need to be complicated. Awareness, process, and the right technical tools are enough to significantly reduce the risk. The key is making sure these things are in place before an attack occurs, not after.

Take a moment to consider how your team currently handles unusual email requests. Ask whether they know what to do if something feels off. The answers to those questions will tell you how prepared your business really is.