WTTA clearly explained

Starting in 2027, the WTTA requires staffing agencies to obtain a licence. What does that mean for client companies, professionals, and freelancers? Hero explains.

What does this mean for you?

The WTTA is the Dutch Admission Act for the Provision of Labour (Wet toelating terbeschikkingstelling van arbeidskrachten). Anyone who hires out staff needs an admission from the Dutch Labour Market Authority. The law plays out differently depending on your role: an application, a check, or nothing at all.

Clients

  • Check your supplier in the register
  • Repeat that check roughly every six months
  • Record the date and the outcome
  • Stop working with them if they lose their admission

Salaried employees

  • Applies to secondment and opting-in
  • You don’t have to arrange anything yourself
  • Hero takes care of the admission
  • Your assignment simply continues

Freelancers (ZZP)

  • The admission requirement doesn’t apply to you
  • You don’t work under direction and supervision
  • So you don’t need to apply for admission
  • The Dutch DBA Act remains your framework

Providers of labour

  • You make an employee available to another company
  • You receive a fee in return
  • That employee works under their direction and supervision
  • All three true? Then you need admission

What changes and when?

1 Nov – 31 Dec 2026

Lenders register for the transitional scheme via toelatinguitleenmarkt.nl. This is a registration, not yet an authorisation.

1 Jan 2027

The WTTA takes effect and the transitional year begins. Hiring out staff is still allowed without final authorisation.

1 May – 30 Jun 2027

The window to apply for authorisation. Anyone who signed up for the transitional scheme also applies during this period.

From 1 Jul 2027

The public register opens. You’ll be able to look up a lender yourself and check their status.

From 1 Jan 2028

The Labour Inspectorate starts enforcement. The Waadi register is absorbed into the WTTA register.

How to vet a supplier.

As a hirer, you have one core obligation: only work with approved staffing providers, and be able to prove it.

  1. Gather the right detailsThe exact company name and Chamber of Commerce number, so you’re checking the right party.
  2. Open the public WTTA registerFrom 1 July 2027, this is the official verification tool for hirers.
  3. Look up the supplierIf the name differs, verify that the legal entity matches.
  4. Check both status and validityThe status should be “admitted” and valid on the day of deployment.
  5. Record it and schedule a recheckSave the date, outcome and reviewer. Repeat every quarter.

The whitepaper covers everything in more detail. It includes a supplier checklist and a form to record your checks.

Download our WTTA whitepaper

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Frequently asked questions about the WTTA.

Who is subject to the admission requirement, and who isn’t?

Anyone who supplies workers: temporary staffing agencies, secondment firms, payroll companies, foundations and intermediaries such as brokers and MSPs. It doesn’t matter whether it’s your main activity or a side activity. It doesn’t apply to contracting for work, to supplying staff within the same company, or between affiliated companies on a non-profit basis.

As a client, do I also fall under the WTTA?

Yes, as a hirer you have a duty to check. You may only hire from an admitted supplier and you have to repeat that check periodically. There are no further obligations.

Is an admission enough to comply with the Dutch DBA Act?

No, these are two separate regimes. The WTTA is about supplying employees, the DBA Act is about whether a self-employed professional is genuinely independent. Both can apply at the same time.

What happens if I hire from a non-admitted supplier?

From 1 January 2028 the Labour Inspectorate will start enforcing. The WTTA includes chain liability: if one link in the chain isn’t compliant, the entire chain risks a fine. In case of on-hiring, every link in the chain needs an admission.

What happens to the Waadi register?

As of 1 January 2028, the Waadi register at the Chamber of Commerce will transfer to the WTTA register at the NAU. The Waadi registration requirement will be dropped. Registration in the Trade Register remains mandatory.

Is your question not among them? Ask the chat.

Where Hero stands

Hero is SNA-certified and therefore qualifies for the simplified admission route. Read more about our quality and certifications.

Wondering what this means for your supply chain? We’re happy to think it through with you.

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