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Self-testing employees for alcohol or drugs is not permitted for most employers. Test results constitute health data (special categories of personal data), and ordinary employers lack a valid legal basis for this—even with the employee's consent. The situation is different only when there is a statutory basis or through the company doctor.
The employer's dilemma
Employers want a safe working environment and rightly prohibit the use of alcohol or drugs at work. But what if an employee shows up intoxicated or under the influence? The temptation to test is understandable — but legally tricky.
Test results are special personal data
An alcohol or drug test generates health data, which are special categories of personal data subject to a processing prohibition (Article 9 GDPR). You may only process them if a statutory exception applies. For most employers, this is not the case.
Consent is not a solution
You cannot simply rely on the employee's consent. In the hierarchical relationship between employer and employee, consent is not considered freely given; after all, the employee may feel pressured. Therefore, 'consent' does not provide a valid basis for self-testing.
What is allowed?
In principle, self-testing is only permitted if there is a legal basis, such as in certain safety-sensitive sectors. Outside of these areas, however, you may implement other policies: a clear ban on substance use, addressing employees regarding visible behavior, sending them home in case of danger, and engaging the company doctor. Document this policy in an employee handbook.
Frequently Asked Questions
Am I allowed to test my employees for alcohol or drugs?
Not for most employers: test results are special personal data without a valid legal basis. It is only possible with a legal basis.
Is it allowed with the employee's consent?
No. In a relationship of authority, consent is not considered freely given and provides no valid legal basis.
What can I do then?
Enforce a clear ban, address employees regarding visible behavior, send them home in case of danger, and involve the company doctor.
Want to properly manage your substance use policy?
Our legal experts establish a legally valid policy in your employee handbook. View our privacyor employment lawteam, or schedule a free consultation.
