Types of Dutch Employment Contracts
Dutch law recognizes three main types of employment contracts, each with distinct rules regarding termination, probation periods, and employee protections:
- Indefinite contract (onbepaalde tijd): No end date — the standard for permanent employment. Strongest employee protections. Maximum 2-month probation.
- Fixed-term contract (bepaalde tijd): Has a specified end date. Maximum 1-month probation for contracts 6mo–2yr. Automatically ends on the end date (no notice needed for contracts ≤6 months).
- On-call contract (oproepovereenkomst): Zero-hours or min-max contracts. After 12 months, employer must offer fixed hours based on average worked.
Mandatory Contract Clauses (2026)
Since the implementation of the EU Transparent Terms Directive, Dutch employment contracts must include an extensive list of mandatory information:
- Identity and address of both parties
- Place of work or indication of flexibility
- Job title, function description, and grade/level
- Start date (and end date if fixed-term)
- Salary amount, components, and payment frequency
- Working hours and rest period arrangements
- Holiday entitlement and holiday allowance percentage
- Notice period for both parties
- Applicable CLA (if any)
- Pension scheme details
- Training entitlements and policy
- Probation period terms
The Chain Rule (Ketenregeling)
The chain rule governs when fixed-term contracts automatically convert to indefinite contracts. Understanding this rule is critical for workforce planning:
- Maximum 3 consecutive fixed-term contracts: The 4th contract automatically becomes indefinite
- Maximum 3 years total duration: If total duration exceeds 3 years, the contract becomes indefinite
- Break period: A gap of more than 6 months resets the chain completely
- CLA exceptions: Some CLAs allow up to 6 contracts over 4 years
Probation Period Rules
Strict rules apply to probation (proeftijd) clauses in Dutch contracts. Invalid probation clauses are completely void — not partially enforceable.
- Contracts ≤ 6 months: No probation allowed
- Contracts 6 months – 2 years: Maximum 1 month
- Indefinite or 2+ year contracts: Maximum 2 months
- Must be agreed in writing before the start date
- Must be equal for both employer and employee
- Cannot be included in a renewed contract for the same position
Non-Compete & Confidentiality Clauses
Dutch courts actively review and restrict non-compete (concurrentiebeding) and relation clauses. Key rules since WAB reform:
- Fixed-term contracts: Non-compete clauses require a written motivation explaining the compelling business interest. Without it, the clause is void.
- Indefinite contracts: Non-compete is valid without motivation, but courts frequently restrict scope, duration, or geographic reach.
- Compensation: Former employees may claim compensation if a non-compete unreasonably limits their career options.
- Confidentiality: NDA clauses are generally enforceable but must be proportionate.
