2 Months' Probation on a 1-Year Dutch Contract? Debunking a Costly HR Myth

The Myth: "As long as it's in the contract and the employee agrees, you can set a two-month probation period for a one-year role in the Netherlands."

For HR managers moving into the Dutch market, this feels intuitive. A longer probation period for a senior role seems like standard risk management. You get more time to evaluate a key hire, and the candidate agrees to it upfront. It’s a win-win, right? Unfortunately, in the Netherlands, this seemingly logical step can backfire spectacularly.

The Scenario: A Costly Assumption at InnovateForward BV

Meet Maria, the new Head of People for InnovateForward BV, a fast-growing American tech company setting up its European headquarters in Amsterdam. Her first major task is to hire a lead software engineer. She finds the perfect candidate, Alex, and offers him a one-year contract to start.

Coming from a US HR background, Maria adds a two-month probation period to the contract. It seems reasonable for such a critical role. Alex, eager to start, reads the contract and signs it. Everything seems perfect.

Six weeks in, however, red flags appear. Alex’s performance is well below expectations, and there are concerns about his fit with the team culture. Maria decides to act decisively. Citing the probation period, she informs Alex that the company is terminating his employment. She expects a difficult conversation, but not a legal challenge.

A week later, a letter arrives from Alex’s lawyer. The termination is invalid. The letter states that because the probation period stipulated in the contract was longer than legally allowed, the entire probation clause is void. InnovateForward BV is now legally bound to the full one-year contract.

The Reality: Dutch Law is Strict and Precise

Maria fell for one of the most common and costly misconceptions in Dutch employment law. The rules for probationary periods (known as proeftijd) are not flexible. They are strictly defined in the Dutch Civil Code (Article 7:652) and depend entirely on the duration of the employment contract:

• Contract of 6 months or less: No probation period is allowed at all.
• Contract longer than 6 months but shorter than 2 years: Maximum probation period is one month.
• Contract of 2 years or longer (or an indefinite contract): Maximum probation period is two months.

Because Maria’s one-year contract fell into the second category, the maximum legal probation period was one month. By setting it to two months, she didn't just overstep the mark—she invalidated the clause entirely. The company lost its right to terminate the contract easily and was now facing a choice: keep an underperforming employee for another ten months or start a complex and expensive dismissal procedure through the courts or the UWV (Employee Insurance Agency).

The AI Clarity Moment: A Simple Question, A Clear Answer

How could this have been avoided? Before issuing the contract, Maria could have turned to an AI legal copilot like LawYours.AI and asked a simple question:

“What is the maximum probation period for a 1-year employment contract in the Netherlands?”

In seconds, the AI would have provided a clear, actionable answer:

“For an employment contract with a duration of more than six months but less than two years (such as a 1-year contract), the maximum permitted probation period under Dutch law is one month. It must also be agreed upon in writing. Setting a longer period, such as two months, would render the entire probationary clause null and void. Source: Dutch Civil Code, Book 7, Article 652.”

This simple, instant check would have armed Maria with the correct information, saved the company thousands of euros, and prevented a significant legal headache.

3 Simple Rules to Remember

1. Check the Duration: The contract's length is the only thing that determines the maximum probation period. The seniority of the role is irrelevant.
2. Put It in Writing: A verbal agreement on a probation period is never valid. It must be explicitly included in the written employment contract signed by both parties.
3. When in Doubt, Ask: Dutch employment law is precise. Before making an assumption, use a trusted tool or consult an expert to verify the rules. A five-second check can prevent a year-long 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.