Dutch Work Contracts Explained: What to Check Before You Sign

You got the offer. You negotiated the salary. And now there's a PDF in your inbox titled "arbeidsovereenkomst" and it's 12 pages of Dutch legalese with an English translation that's almost worse. You're supposed to sign it by Friday.

This is the moment most expats just... sign. They're so relieved to have a job that they don't read the fine print. And most of the time it's fine. But sometimes it isn't. Sometimes there's a non-compete clause that means you can't work for a competitor in the Netherlands for two years. Sometimes the trial period means they can fire you next Tuesday with no notice. Sometimes the contract type means you'll be looking for a new job in 12 months.

Dutch employment contracts have their own rules, their own terminology, and their own gotchas. Here's what you need to know before you sign.

Fixed-term vs permanent: the two types of contract

Dutch employment law has two basic contract types: tijdelijk (fixed-term) and vast (permanent). Which one you get matters a lot more here than in most countries.

Most expats start with a one-year fixed-term contract. This is completely normal. The company wants to see if you work out before committing to a permanent arrangement. It's not a sign they're unsure about you — it's just how the system works.

The important thing to know is the ketenregeling (chain rule): an employer can offer you a maximum of 3 consecutive fixed-term contracts over a maximum of 3 years. After that, the next contract automatically becomes permanent. So if you get a 1-year contract, then another 1-year contract, then another — the fourth one must be permanent, or the third one already converts if the total exceeds 3 years.

A gap of more than 6 months between contracts resets the chain. Some employers use this — letting you go for 6+ months and then rehiring you on a fresh chain of temporary contracts. It's legal but it's a red flag about how they treat people.

The proeftijd (trial period)

Almost every Dutch contract includes a proeftijd — a trial period during which either side can end employment immediately, without notice, without reason, without severance. Just "it's not working out, goodbye."

The rules:

• Contracts of 6 months or less: no proeftijd allowed
• Contracts of 6 months to 2 years: maximum 1 month
• Contracts of 2+ years or permanent: maximum 2 months

During the proeftijd, you have essentially zero protection. Your employer can let you go on day one for any reason (as long as it's not discriminatory). This sounds scary, but it works both ways — you can also leave immediately if the job isn't what you expected.

One more thing: the proeftijd must be in writing and must be equal for both sides. If the contract says the employer gets 2 months but you only get 1 month, the entire clause is void.

CAO — the collective agreement you might not know about

About 80% of Dutch workers are covered by a CAO (Collectieve Arbeidsovereenkomst) — a collective labor agreement negotiated between unions and employer organizations for an entire industry.

Why this matters: a CAO sets minimum standards for salary, vacation days, overtime pay, sick leave, pension contributions, and training budgets. Your individual contract cannot offer less than what the CAO requires. So even if your contract says "20 vacation days," the CAO might guarantee you 25.

Common sectors with CAOs that affect expats: banking (ABN AMRO, ING, Rabobank all follow banking CAOs), tech (some larger companies), logistics, healthcare, education, and government. Startups and smaller companies often don't have a CAO — everything is individually negotiated.

How to check: ask HR directly: "Does a CAO apply to my role?" If they say yes, ask for a copy or a link. You can also search for your industry's CAO at cao.minszw.nl. It's in Dutch, but the salary tables and vacation days are numbers — those translate fine.

Notice periods (opzegtermijn)

When you want to leave a job — or when your employer wants to let you go — there's a required notice period. The default for employees is 1 calendar month. For employers, it depends on how long you've been there:

Notice always runs to the end of a calendar month. If you submit your resignation on March 15, your last day is April 30 — not April 15. Plan accordingly.

Your contract or CAO can set a longer notice period for you, but it can never be longer than the employer's. If they want you to give 2 months' notice, they must give you at least 4 months. Check this before signing — a 3-month notice period from the employee side is unusually long and can make job switches awkward.

This matters especially if you have the 30% ruling: remember that the gap between jobs must not exceed 3 months, or you lose it. Your notice period needs to fit within that window when you're planning a move.

Non-compete clauses (concurrentiebeding)

Non-compete clauses are more common in the Netherlands than most expats expect. A standard clause might say you can't work for a competitor within the Netherlands for 1–2 years after leaving the company. Some also include a relatiebeding (non-solicitation clause) that prevents you from approaching the company's clients.

The rules changed significantly in 2015:

• Permanent contracts: non-compete clauses are standard and generally enforceable. Courts can moderate them (shorten the duration or narrow the scope), but they'll usually uphold a reasonable clause.
• Fixed-term contracts: a non-compete clause is only valid if the employer includes a written explanation of why it's necessary due to compelling business interests. A generic "we need to protect our competitive position" doesn't cut it. They need to be specific. If the justification is missing or vague, the clause is void.

Practical advice: if you're signing a fixed-term contract with a non-compete clause, ask what the specific business justification is. If you're signing a permanent contract with a broad non-compete, negotiate the scope. "I can't work for any competitor in the Netherlands for 2 years" could effectively trap you in your job. Try to narrow it to specific competitors, a shorter duration, or a smaller geographic area.

If you're in a field like tech where everyone works for "competitors," this clause can be a real problem. Get it modified before signing, not after.

Vacation days and ADV

The legal minimum in the Netherlands is 20 vacation days per year (based on a 5-day work week). In practice, most companies offer 25. Some offer 27 or even 30, especially at senior levels or as part of a CAO.

You might also encounter ADV days (arbeidsduurverkorting — working time reduction days). These are extra days off that compensate for working more than the standard hours in your CAO. For example, if the CAO sets a 36-hour week but you work 40 hours, the extra 4 hours per week accumulate as ADV days — typically 12–13 extra days per year.

ADV days are not the same as vacation days. They follow different rules for accrual and expiry. Make sure you understand which is which.

One thing that surprises expats: Dutch vacation days don't expire on December 31. Your statutory days (the legal minimum 20) expire on July 1 of the following year. Your extra days (anything above 20, including ADV) often have a longer expiry — typically 5 years, unless the CAO or contract says otherwise. Use your statutory days first.

Also worth knowing: you can negotiate extra vacation days as part of your total package. Dutch employers are often more flexible on days than on salary, because extra days cost them less than a raise.

What to actually check before signing

Here's the checklist. Go through your contract line by line and verify these:

• Contract type: is it tijdelijk or vast? If fixed-term, what's the end date? Is there a clause about renewal?
• Proeftijd: how long is the trial period? Is it legal for your contract length? Is it equal for both sides?
• Salary: is this including or excluding the 8% vakantiegeld (holiday allowance)? Is there a 13th month? What's the pension contribution split? Our salary guide breaks all of this down.
• Non-compete: is there one? How broad is it? If you're on a fixed-term contract, is there a written justification?
• Notice period: what's your notice period? What's the employer's? Are they proportional?
• CAO: does one apply? If so, which one? Are the terms in your contract at least as good as the CAO minimum?
• Vacation days: how many? Are ADV days included separately? What's the expiry policy?
• Work location and WFH: how many days are you expected in the office? Is there a thuiswerkvergoeding (work-from-home allowance)?
• Travel allowance: is there a reiskostenvergoeding? How is it calculated?
• Pension scheme: what's the employer's contribution? What's yours? Is it a defined-benefit or defined-contribution plan?
• 30% ruling: if applicable, has the employer agreed to apply for it? Is this mentioned in the contract? Read our 30% ruling guide for the full details.
• Sick leave: Dutch law requires employers to pay at least 70% of salary during the first 2 years of illness. Most companies pay 100% in year one and 70% in year two. Check what your contract says.

Now go read that contract

You have leverage right now — the company wants you, they've made an offer, and they're waiting for your signature. This is the best moment to ask questions and negotiate changes. Once you've signed, your options narrow significantly.

Take the weekend. Read every clause. Ask about anything you don't understand. Dutch employers don't think you're difficult for asking questions about a contract — they think you're thorough. And thorough is a compliment in this country.

If you're still preparing for the interview stage, or need help with your application materials, grab our free Dutch CV template and start from there. Considering going freelance instead? Our ZZP guide covers a very different path — with its own pros, cons, and paperwork. And once you've signed and you're starting your new role, our guide to your first 30 days at a Dutch company covers everything from borrels to birthday cake.