Guide · Data protection

ChatGPT at work: why “just using it” is dangerous

May 26, 2026 · 6 min read

In most companies the team already uses ChatGPT — they just don't admit it. And that's exactly the problem: every pasted customer list, every draft contract can end up in the wrong hands. The good news: you can use AI at work completely safely. You just need to know how.

What actually happens when you paste something

Type something into the free version of ChatGPT and that information leaves your building and lands on servers in the US. Depending on the settings, it may be used for training. For a quick question that's fine. For customer data, HR data or trade secrets it's both a data-protection and a competitive risk. This is where most "quick experiments" go wrong.

The three most common mistakes

  • Pasting sensitive data: real customer names, figures, contracts — without knowing where they go.
  • No clear team rule: everyone uses it differently, nobody owns it.
  • Using output unchecked: AI sounds convincing even when it's wrong.

How to use AI at work safely

Safe doesn't mean "ban it" — bans just push it underground. Safe means creating the right framework.

1. Business plans, not the free version

In the business/team plans your inputs are not used for training by default. That's the most important first step.

2. Your own, walled-off solution

If you regularly work with sensitive data, a dedicated AI application is best — EU-hosted, with access only to your data and no data flowing outside.

3. Clear, simple ground rules

Half a page is enough: what may go in, what may not, who owns it. Understandable for everyone — no AI background required.

What's actually worth it — for beginners

You don't need to be a tech pro to benefit. Realistic, everyday uses: drafting text and emails, summarising long documents, brainstorming, translation, structuring research. The trick isn't perfect "prompt engineering" — it's starting small and choosing the right solution for sensitive content.

Conclusion

ChatGPT at work is no risk when set up properly — and an avoidable one when not. If you want to work with your own data regularly, consider a walled-off, GDPR-ready solution. Our AI use-case check shows which application pays off first for you. For more sensible use cases, read AI in the Mittelstand: 7 use-cases with real ROI.

Frequently asked questions

Can I use ChatGPT at work at all?
Yes — with the right plan and clear rules. In the business/team plans your inputs are not used for training by default. For regular work with sensitive data, a dedicated EU-hosted solution is recommended.
Which data should NEVER go into a free AI tool?
Real customer data, HR data, contracts, trade secrets, medical or third-party financial data. Anonymised or hypothetical examples are fine.
Do I need a Data Processing Agreement (DPA) with OpenAI?
If you use ChatGPT commercially for processing personal data: yes. OpenAI offers a Data Processing Addendum for business customers — you need to actively sign it.