Build Faster, Stay Compliant: How Danish Companies Can Legally Scale Capacity with B2B Subcontractors from NesWork.eu

In Denmark’s construction and installation industry, demand for skilled professionals continues to grow. Tight deadlines, seasonal peaks, and increasing project complexity make flexibility more essential than ever.

With NesWork.eu, Danish companies can strengthen their teams through a fully legal B2B cooperation model based on EU law and Danish regulations. We supply experienced subcontractors from across Europe – safely, transparently, and without administrative burden.

1️⃣ The Legal Framework – EU Freedom to Provide Services

Both Poland and Denmark are EU member states. According to Articles 56–62 of the Treaty on the Functioning of the European Union (TFEU), companies are free to provide services across borders within the EU.

That means a Polish company like NesWork can temporarily carry out work in Denmark without establishing a Danish branch, provided that it complies with:

RUT registration (Register of Foreign Service Providers)
Working environment and labour law
Social security rules (A1 certificate)
Taxation and VAT obligations (reverse charge)

This framework is described in detail by Workplace Denmark – an official Danish information portal for foreign service providers.

2️⃣ RUT Registration – Proof of Legal Operation in Denmark

Before any physical work starts, all foreign service providers must register in the RUT (Register of Foreign Service Providers). This rule applies both to companies posting employees and to self-employed professionals engaged in construction, installation, or technical work.

The registration must include information such as:

Company details (NIP/VAT number, contact, address)
Service description and duration
Danish client details
Information about posted workers (if any)

Registration must be completed no later than the time the work begins, and any changes (e.g. dates, employees) must be updated within one business day. Failure to register may result in fines up to DKK 10,000.

At NesWork, we handle the entire RUT process and provide our clients with the registration receipt – proof that all formalities are complete.

3️⃣ Social Security and A1 Certificates

Under EU coordination rules, workers temporarily posted to another EU country remain insured in their home country if they hold a valid A1 certificate. This confirms that social security contributions continue to be paid in the worker’s country of origin.

All subcontractors provided by NesWork have valid A1 documents issued by their home institutions (e.g. ZUS in Poland). These certificates are accepted by Danish authorities and can be presented on request during inspections.

4️⃣ Taxes and VAT – The Reverse Charge Mechanism

In most cross-border B2B services, VAT is accounted for by the Danish client under the reverse charge system. The Polish supplier issues an invoice without VAT, including the note:

“Reverse charge – Article 196 of the EU VAT Directive.”

This keeps accounting simple and avoids double taxation. If the activity becomes long-term or qualifies as a permanent establishment, NesWork assists with the necessary VAT registration in Denmark.

5️⃣ Working Conditions and Health & Safety

Denmark places high importance on workplace safety and fair working conditions. Foreign companies must comply with the same standards as Danish firms, including:

Safe working practices and proper use of protective equipment
Respect for working time, rest periods, and site-specific rules
Compliance with collective agreements where applicable

NesWork ensures that all subcontractors are briefed in English or German and follow Danish health and safety requirements on every site.

6️⃣ Why the B2B Model Works Best

A B2B cooperation offers maximum flexibility, full compliance, and clear separation of responsibilities. It is not an employment relationship – it is a contract between two independent companies.

Fast access to skilled professionals
No payroll or employment obligations
Independent workers with their own tools and vehicles
Easy scaling – add or replace team members within days
Transparent documentation and invoicing

This model gives Danish companies the ability to expand project capacity without risk.

7️⃣ Our Typical Workforce

Electricians (industrial and building installation)
HVAC specialists (heating, ventilation, air-conditioning, sanitary)
Roofers and façade workers
Welders, fitters and mechanical assemblers
Construction and installation technicians

All teams are experienced professionals from Poland, Slovakia, Slovenia, Ukraine and other EU countries. Communication is always possible in English or German.

8️⃣ Step-by-Step: How Cooperation Works

Initial Contact – We discuss your project scope, schedule, and requirements.
B2B Agreement – We sign a subcontractor contract defining the scope and duration.
RUT Registration – We register all activities before work begins.
Social Security Compliance – We prepare and verify A1 certificates.
Mobilisation – Workers arrive with tools, transport, and accommodation.
Execution & Flexibility – You can adjust the workforce at any time.
Documentation & Invoicing – You receive RUT confirmation and reverse-charge invoices.

9️⃣ Frequently Asked Questions

Do I need a Danish employment contract with NesWork workers?
No – cooperation is strictly business-to-business. NesWork provides services as a subcontractor under EU law.

Is RUT registration mandatory?
Yes – all foreign service providers performing physical work in Denmark must register before work begins.

What happens if RUT is not registered?
Authorities can issue fines of DKK 10,000 for non-compliance and DKK 20,000 for repeated cases.

Is there a minimum wage in Denmark?
Denmark has no statutory minimum wage; conditions are regulated by collective agreements or site-specific terms.

Who pays VAT?
Under reverse charge, the Danish customer accounts for VAT. The Polish supplier invoices net.

Do workers carry A1 certificates?
Yes – each subcontractor holds a valid A1 certificate confirming legal insurance coverage.

🔟 Why Danish Companies Choose NesWork

Legal and compliant – RUT, A1, and documentation handled by us
Fast mobilisation – Teams ready within days
High-quality professionals – Experienced in Nordic and German site standards
Transparent contracts – Clear scope, terms, and invoicing
Reliable partnership – Compliance and flexibility guaranteed

✅ Quick Compliance Checklist

☑ RUT notification submitted before work starts
☑ A1 certificates verified and filed
☑ B2B contract signed (scope, duration, liability)
☑ Danish site safety and work conditions respected
☑ Reverse-charge invoice issued after completion

🚀 Start Your Legal B2B Cooperation Today

If your company needs skilled subcontractors to finish projects on time – safely, legally, and efficiently – NesWork.eu is your trusted partner.

👉 Visit www.NesWork.eu and let’s discuss your next project.

NesWork – European Expertise. Danish Standards. Legal Confidence.