WAADI Netherlands | Access Financial

WAADI is the Dutch Act on the Allocation of Workers by Intermediaries. Any business that supplies workers to clients in the Netherlands — even once, even from abroad — must register the activity with the Chamber of Commerce (KvK). Hirers can verify a supplier in the public register via a WAADI check; using an unregistered supplier risks fines starting around €8,000 per worker, rising to €90,000+ for repeat offences on both parties.

A waadi check takes thirty seconds on the KvK website, and skipping it is among the most expensive shortcuts in Dutch contracting. WAADI registration applies to anyone making workers available under a client’s supervision — Dutch agencies, foreign staffing companies and, in some structures, even group companies seconding staff. This guide explains who must register, how the check works, how WAADI interacts with the ZZP enforcement wave, and where an Employer of Record fits in 2026.

Who must register under WAADI?

Registration is required for any entity that provides workers to another party which supervises and directs the work — temporary agencies, secondment firms, payroll companies and foreign suppliers placing people at Dutch clients. Non-commercial, occasional intra-group secondment is exempt; commercial supply is not, and one placement is enough to trigger the duty.

Registration itself is administrative — the KvK records the labour-supply activity against the company — but the ecosystem around it is hardening: the WTTA admission system will replace bare registration with vetting (financial guarantees, certification), converting today’s formality into a genuine barrier for non-compliant suppliers. Foreign agencies placing into the Netherlands are squarely in scope and are the group most often caught unregistered in our onboarding reviews.

How to run a WAADI check (and when)

Search the KvK WAADI register by company name or KvK number — free and public.
Confirm the labour-supply flag is active for the exact legal entity on your contract, not a sister company.
Repeat at contract renewal: registrations lapse when entities restructure; hirers share liability, so an annual re-check is standard governance.

Hirers carry their own duty here: the fine for using an unregistered supplier mirrors the supplier’s fine. Two minutes of verification against the register is the cheapest compliance control in Dutch staffing.

WAADI, ZZP enforcement and the 2026 landscape

WAADI regulates supplied employees; the parallel Dutch battle is over zzp contractors (zelfstandigen zonder personeel). Since full DBA enforcement resumed in January 2025, the Belastingdienst actively reclassifies false self-employment — with sectors like healthcare (zzp in de zorg is one of the country’s most searched staffing queries) under specific scrutiny because rosters, supervision and continuous care work map poorly onto genuine self-employment. Add the More Security for Flexible Workers Act tightening contract chains, and the direction is unambiguous: structures that route de-facto employees through ZZP contracts or unregistered intermediaries are being squeezed from both ends.

Compliant routes: payroll, registered leasing or EOR

Three structures survive scrutiny. If you have a Dutch entity, run payroll netherlands properly (employer on-costs roughly 25–30%: holiday allowance of 8%, pension where a sector scheme applies, and premiums differentiated by contract type under the WAB). If you supply workers commercially, register under WAADI and prepare for WTTA admission. If you have no Dutch entity, an employer of record netherlands arrangement — WAADI-registered, NEN 4400-1 certified — employs the worker and leases them to your client lawfully. Access Financial’s Dutch operation carries both credentials; ask us to run the WAADI and status check on your current Dutch placements — findings within 48 hours.

Summary — key takeaways

WAADI registration at the KvK is mandatory for anyone supplying workers to Dutch clients — including foreign agencies; one placement triggers it.
Run a WAADI check on every supplier at signing and renewal; hirers share the fines (≈€8k per worker, escalating past €90k).
ZZP reclassification enforcement is active since 2025 — healthcare and single-client contractors are priority targets.
No Dutch entity? A WAADI-registered, NEN 4400-1 certified EOR is the compliant route.

FAQ: WAADI and Dutch contracting

What is WAADI?

WAADI is the Dutch Allocation of Workers by Intermediaries Act. It requires every business that makes workers available to clients under the client’s supervision — agencies, secondment and payroll firms, foreign suppliers — to register that activity with the Chamber of Commerce, and gives supplied workers rights such as equal treatment. It is the legal backbone of Dutch labour leasing.

How do I do a WAADI check?

A WAADI check is done in the KvK’s public register: search the supplier’s name or KvK number and confirm the labour-supply activity is registered for that exact legal entity. Do it before signing and again at each renewal. If the flag is missing, do not proceed — the hirer is fined alongside the supplier.

What is the fine for WAADI non-compliance?

WAADI fines start around €8,000 per supplied worker for a first offence and scale to €90,000+ for repeat violations — applied to both the unregistered supplier and the hirer that used them. With the WTTA admission system adding financial guarantees and certification, the cost of non-compliance in Dutch staffing rises further from here.

WAADI Check 2026: Registration Rules & ZZP Risks