'We Can Fire Them in the Trial Period, Right?' A Dutch Employment Law Myth, Busted
Many international managers assume a Dutch trial period is a flexible, informal 'try-out'. This costly myth can lead to unfair dismissal claims. Learn the strict reality and see how AI can provide instant clarity.

The Myth: A Dutch 'proeftijd' (trial period) is an informal get-out-of-jail-free card.
Many international managers operating in the Netherlands believe that the trial period is a simple formality. They assume it functions like an American-style 'at-will' period, where they can terminate an employment contract for almost any reason, at any time, with no questions asked. This misunderstanding is one of the most common and expensive mistakes a company can make.
The Scenario: A Costly Assumption at 'Global Foods BV'
Meet Sarah, a dynamic Head of Sales from Canada, recently transferred to lead the new Amsterdam office of ‘Global Foods BV’. She was excited to build her team and quickly hired Mark, a promising sales executive, on a one-year fixed-term contract.
During the final interview, Sarah told him, "The first two months will be a trial period, just so we can both see if it’s a good fit." Mark agreed, and they shook hands. The busy HR team sent over the standard one-year contract, which Mark signed. The trial period was mentioned in the email chain but not explicitly included as a specific clause within the signed contract itself.
Six weeks in, Sarah felt Mark wasn't aggressive enough for her sales style. She called him into her office and said, "Look, Mark, it’s just not working out. We’re still in the trial period, so we’re going to have to let you go, effective immediately." She was confident she was acting well within the company’s rights.
Two weeks later, a letter arrived from Mark’s lawyer. The termination was being challenged as an unfair dismissal. Sarah was stunned. How could this be?
The Reality: Dutch Trial Periods are Strictly Regulated and Not Assumed
Dutch law is extremely precise about trial periods. For a trial period to be legally valid, it must meet several strict conditions. If even one condition is missed, the trial period clause is considered void, and the employee is fully protected from day one.
The critical mistake Global Foods BV made was assuming a verbal agreement or an email mention was enough. Under Dutch law (Article 7:652 of the Dutch Civil Code), a trial period clause is only valid if it is agreed upon in writing within the employment contract itself for both the employer and the employee.
Furthermore, the length of the trial period is strictly limited based on the contract duration:
- Contract of 6 months or less: No trial period is allowed at all.
- Contract longer than 6 months but shorter than 2 years: Maximum of 1 month trial period.
- Permanent contract or a contract for 2 years or longer: Maximum of 2 months trial period.
Sarah's 'two-month' trial period for a one-year contract was already legally invalid in its length, and because it wasn't in the signed contract, it simply didn't exist in the eyes of the law. Mark's dismissal was therefore an immediate breach of contract.
The AI Clarity Moment: A 30-Second Check That Saves Thousands
How could Sarah have avoided this? Before acting, she could have turned to an AI legal copilot like LawYours.AI and asked a simple question:
“What are the rules for a trial period in a 1-year Dutch employment contract?”
In seconds, the AI would have provided a clear, actionable summary:
"For a one-year fixed-term contract in the Netherlands, the maximum allowable trial period is one (1) month. Crucially, this clause MUST be included in writing in the signed employment contract to be legally valid. A verbal agreement is not sufficient. A trial period longer than one month for this contract type would be void. Source: Dutch Civil Code, Art. 7:652."
This simple, instant clarification would have stopped Sarah from making a costly mistake. She would have realized there was no valid trial period and would have had to follow the proper performance management or dismissal procedures, saving Global Foods BV from a lengthy and expensive legal dispute.
3 Simple Rules to Remember
- Always Get It In Writing: A trial period must be an explicit, written clause in the signed employment contract. No exceptions.
- Check the Duration Limits: The length of the trial period is strictly tied to the length of the contract. Memorize the 0/1/2 month rules.
- When in Doubt, Ask: Before making any termination decision, use a trusted resource like an AI legal copilot or consult with a legal professional to verify your assumptions. A quick question can prevent a big problem.
Disclaimer: This article describes a fictionalized scenario for illustrative and educational purposes only. It is not intended to be and should not be construed as legal advice. Any resemblance to actual events, entities, or individuals is purely coincidental.





