The Wet allocatie arbeidskrachten door intermediairs (Wet WAADI) is the Dutch law that sets the framework for organisations that supply workers to third parties, including staffing agencies, payrollers, and secondment firms. It combines earlier rules on labour allocation into a single statute and is enforced by the Nederlandse Arbeidsinspectie.
Two provisions stand out for hirers. The equal-pay rule requires intermediaries to pay at least the same wage and key allowances as comparable workers at the hirer, which operates alongside the CAO-based inlenersbeloning. The registration duty obliges any business that places workers under third-party direction to register that activity in the trade register.
The law also prohibits charging workers a fee for placement and restricts the use of labour allocation during strikes. Breaches can lead to fines, recovery actions, and reputational damage for both the intermediary and the hirer. The Nederlandse Arbeidsinspectie applies a three-band tariff for unregistered labour supply based on the number of workers supplied: EUR 8,000 where fewer than 10 workers are supplied, EUR 16,000 where 10 to fewer than 30 workers are supplied, and EUR 32,000 where 30 or more workers are supplied. Recidivism multipliers apply: 2x for a second violation and 3x for a third, so a third offence involving 30 or more workers can reach EUR 96,000. Fines are imposed on both the uitlener (lender) and the inlener (hirer).