A Suffolk-based accounting firm was hit by a ransomware attack this month, claimed by a group operating under the name “thegentlemen,” which runs the now-standard double-extortion model — encrypting systems while threatening to publish stolen data if a ransom isn’t paid. The firm itself is small: a general practice handling personal tax returns, sole trader accounts, payroll and bookkeeping for individuals and small companies, the kind of outfit that exists in every UK town serving exactly the client base this site is written for.

That’s precisely why it matters. This isn’t a story about one unlucky practice — it’s a reminder that the professionals holding your most sensitive financial information are themselves a target, and often a softer one than the businesses they serve.

Why accountants and bookkeepers are an attractive target

Think about what a small accounting practice holds on its systems: tax returns, payroll data, bank account details, VAT records, sometimes access to client accounting software directly. For an attacker, breaching one firm can mean access to the financial data of dozens or hundreds of client businesses in a single hit — far more efficient than attacking each one individually. And professional services firms, particularly smaller ones, often run leaner IT setups than the businesses they advise, without a dedicated security team or budget for the kind of monitoring larger organisations take for granted.

This is the same supply-chain pattern we keep seeing across sectors this year: attackers increasingly go after the smaller, less-defended link that gives them access to many bigger prizes at once, rather than trying to breach a well-defended target directly.

What this means for how you choose and manage your accountant

You can’t audit your accountant’s IT infrastructure the way you might a software vendor, but you can ask sensible questions before you hand over your financial life, and periodically afterwards. Ask what they do to protect client data: is it encrypted, is access limited to staff who need it, do they have a tested backup that isn’t connected to the same network as everything else? A firm that can answer these clearly and without defensiveness is telling you something useful about how seriously they take it.

Limit what you share and how you share it. Not every document needs to sit in an email thread indefinitely or a shared drive folder nobody’s reviewed in years. Ask your accountant how they prefer to receive and store sensitive documents, and use whatever secure portal or upload system they offer rather than defaulting to email attachments.

Know your own breach-notification obligations, not just theirs. If a supplier you rely on for financial services is breached and your data is caught up in it, you may have obligations of your own under UK GDPR, depending on what was exposed and how. Smallprint has plain-English templates for exactly this kind of situation, so you’re not scrambling to work out what you’re required to tell clients or regulators while you’re also dealing with the fallout of someone else’s breach.

Get a proper read on your actual exposure, not a guess. If you’re not sure which of your suppliers — accountant, payroll provider, IT support, or anyone else holding sensitive data — represents your biggest third-party risk, KeepSafe provides ongoing monitoring that flags incidents like this one affecting your supply chain, rather than you finding out weeks later from the news.

The takeaway

Your own cybersecurity is only as strong as the weakest professional you share your data with. This month it was an accounting firm in Suffolk; next time it could be your bookkeeper, your payroll provider, or your solicitor. Ask the firms holding your financial data what they’re doing to protect it — before an incident forces the question.