NL
EN
TR
BG
PL
The Wtta introduces a mandatory statutory admission system for all businesses supplying temporary labour in the Netherlands. Staffing agencies must prove tax and labour law compliance, provide a certificate of conduct (VOG) and post a financial security deposit. Employers may only hire staff through agencies listed in the public admission register.
1. Why the Wtta replaces voluntary certification
For years, quality assurance in the Dutch staffing industry relied primarily on voluntary schemes such as NEN 4400-1 (SNA). With the Admission of Posting of Workers Act (Wtta), the Dutch legislature established a mandatory public admission regime to prevent underpayment and ensure a level playing field for compliant agencies and employers.
- Mandatory admission overseen by the Dutch Labour Market Lending Authority (NAU).
- Active enforcement by the Netherlands Labour Authority at both agency and client level.
- Public register allowing employers to verify immediately whether a staffing partner is admitted.
2. The four core requirements for staffing agencies
To obtain and retain admission to the Dutch staffing market register, an agency must continuously satisfy four statutory pillars covering integrity, financial solidity and fair worker remuneration.
- Certificate of Conduct (VOG) for the legal entity and its directors.
- Financial security deposit (€100,000 standard guarantee, or €50,000 for qualifying starters).
- Periodic audit reports confirming adherence to wage, collective agreement (CAO) and tax rules.
- Accurate Waadi labour-supply registration in the Chamber of Commerce (KVK) Trade Register.
3. What the compliance framework means in practice
The Wtta inspection framework verifies whether temporary workers receive accurate remuneration under the applicable CAO or equivalent pay rules, whether statutory minimum hourly wages are respected, and whether payroll taxes and VAT are remitted on time to the Dutch Tax Administration.
4. Verification duty and fine risk for employers (hirers)
The Wtta places a direct statutory obligation on companies hiring flexible staff. If an employer sources workers from an agency that is not admitted to the public register, the Netherlands Labour Authority can impose administrative fines on both the agency and the hiring company. Register verification must therefore be part of your supplier onboarding.
5. Written confirmation of employment conditions
Under the modernized rules, the hiring employer and the staffing agency must document the applicable pay scales, allowances and employment conditions in writing before the assignment starts. Sharing these parameters during your intake with ACS prevents retroactive payroll adjustments.
6. Prepare your flexible workforce with ACS
ACS Personeelsdiensten operates with transparent administration, clear written assignment confirmations and verifiable KVK and Waadi registration (KVK 70790254). During intake for logistics, production, horticulture or cleaning staff, we align remuneration and compliance documentation in writing before deployment.
