An oproepcontract is the umbrella term for flexible Dutch employment contracts in which the employee is called to work only when needed. It includes nulurencontracten and min-max contracten, as well as certain piecework agreements. The defining feature is that working hours are not fixed in advance.
Since the Wet arbeidsmarkt in balans (WAB) took effect in 2020, employers must observe strict rules. The employee must be called up at least four days in advance, in writing or by another demonstrable means. A shorter CAO-based notice of at least 24 hours applies only in specific sectors. If the employer withdraws a call within the notice window, the employee retains the right to payment for the originally scheduled hours.
Every shift pays for a minimum of three hours, even when the work takes less. After twelve months, the employer must offer a fixed-hours contract based on the average hours worked in that year, giving the employee one month to accept or decline.