Can you work part-time for a Dutch company while employed in Bulgaria?

Yes, you can work part-time for a Dutch company while living and remaining employed in Bulgaria, but the arrangement carries significant legal, tax, and social security implications that both you and your employer must address before work begins. The core challenge is that remote cross-border employment triggers obligations in two jurisdictions simultaneously, and the rules governing each are not always straightforward. The questions below unpack the key compliance dimensions of this arrangement.

Is it legal to work remotely for a Dutch company while living in Bulgaria?

Working remotely for a Dutch employer from Bulgaria is legal for EU citizens. Bulgaria is a European Union member state, which means Bulgarian nationals and EU citizens residing there have the right to work for employers based in other EU countries without requiring a separate work permit. However, legality does not mean simplicity: the arrangement creates a multi-jurisdictional employment relationship that must be structured correctly to remain compliant.

The critical distinction is between being an employee and being a self-employed contractor. If you are formally employed by the Dutch company, Bulgarian labour law may apply to parts of your employment relationship, particularly around working conditions, notice periods, and local protections. If you are engaged as a freelancer, different rules apply entirely, and misclassification risks are significant in both countries. Dutch enforcement of bogus self-employment rules has intensified considerably, and Bulgarian tax authorities are equally attentive to undeclared employment income.

For the arrangement to be legally sound, the employment contract must be carefully drafted to reflect the actual nature of the relationship, and both the employer and the employee must meet their respective obligations in each country.

Which country’s social security system applies when you work part-time from Bulgaria?

Under EU Regulation 883/2004, only one country’s social security system applies at a time: you cannot contribute to two systems simultaneously. For someone working part-time remotely for a Dutch employer while residing in Bulgaria, the determining factor is where the substantial part of the work takes place. If 25% or more of your working time is performed in Bulgaria, Bulgarian social security applies to your entire income, including the portion earned for the Dutch employer.

This is a critical threshold that many employers overlook. A worker spending even a moderate share of their time working from home in Bulgaria crosses that 25% boundary immediately in a part-time arrangement. In practice, this means the Dutch employer would need to register for social security contributions in Bulgaria or find a compliant alternative structure to handle those obligations.

If the work performed in Bulgaria falls below 25% of total working time, the Netherlands would generally remain the competent state for social security. However, part-time arrangements, by definition, often make this threshold difficult to avoid. Employers should obtain an A1 certificate, issued by the competent social security authority, to formally document which country’s system applies and protect both parties in the event of an audit.

Where do you pay income tax if your employer is in the Netherlands but you live in Bulgaria?

Income tax liability in cross-border remote work is determined primarily by tax residency and the terms of the applicable double taxation treaty. Bulgaria and the Netherlands have a double taxation agreement in place, which prevents the same income from being taxed in full by both countries. Under this treaty, income from employment is generally taxable in the country where the work is physically performed.

For a part-time remote worker based in Bulgaria, income earned while working from Bulgaria is taxable in Bulgaria. Income earned while physically working in the Netherlands (for example, during occasional on-site visits) may be taxable in the Netherlands, subject to threshold rules in the treaty. Bulgaria’s flat income tax rate of 10% is notably lower than Dutch rates, which can create planning considerations but should never be used as a basis for misrepresenting where work is actually performed.

Dutch employers accustomed to operating PAYE payroll systems need to understand that they cannot simply withhold Dutch wage tax on a Bulgarian-resident employee’s salary without careful analysis. Doing so may result in double taxation for the employee or non-compliance in Bulgaria. A local tax advisor in both jurisdictions is essential before the first payslip is issued.

What are the employer’s obligations when hiring a part-time remote worker in Bulgaria?

A Dutch employer hiring a part-time remote worker based in Bulgaria takes on a range of obligations that extend well beyond the employment contract. Depending on how the arrangement is structured, the employer may be required to register as a foreign employer with Bulgarian authorities, withhold and remit Bulgarian income tax, and contribute to the Bulgarian social security system on the employee’s behalf.

These obligations are not optional. Bulgaria’s National Revenue Agency and National Social Security Institute both have mechanisms to identify undeclared foreign employment. Employers who fail to register or remit correctly face penalties, back payments, and reputational risk. The specific obligations include:

  • Registering as a foreign employer with Bulgarian tax and social security authorities if Bulgarian social security applies
  • Issuing a compliant Bulgarian employment contract or addendum reflecting local labour law requirements
  • Ensuring the employee’s working conditions meet Bulgarian minimum standards, including those relating to working time, leave entitlements, and health and safety
  • Obtaining an A1 certificate to confirm the applicable social security jurisdiction
  • Maintaining accurate records of where work is performed, particularly if the split between countries changes over time

Many Dutch employers are simply not equipped to manage payroll compliance in Bulgaria. This is precisely the scenario where an Employer of Record becomes a practical solution rather than an optional convenience.

Does the Netherlands–Bulgaria social security agreement affect part-time arrangements?

Yes. The bilateral social security coordination between the Netherlands and Bulgaria is governed by EU Regulation 883/2004, which applies to all EU member states and supersedes older bilateral agreements. This regulation sets out the rules for determining which country’s social security legislation applies, with the goal of ensuring workers are never subject to double contributions or left without coverage.

For part-time remote workers, the regulation’s provisions on multi-state workers are directly relevant. The 25% threshold discussed earlier is a product of this regulation. Employers and employees should also be aware that the regulation requires proactive action: the A1 certificate must be applied for before work begins, not retrospectively. Applying after the fact is possible but complicates the employer’s compliance position considerably.

The regulation also addresses situations where the applicable country changes, for instance, if a worker increases or decreases their Bulgarian working time across the 25% threshold. Each change in working pattern should trigger a review of the social security position and, where necessary, a new A1 application.

What’s the most compliant way to structure this type of employment arrangement?

The most compliant structure for a Dutch employer engaging a part-time remote worker in Bulgaria is to use an Employer of Record operating in Bulgaria. Under this model, the EoR becomes the formal legal employer in Bulgaria, handling local employment contracts, payroll, tax withholding, and social security contributions in full compliance with Bulgarian law. The Dutch company retains day-to-day management of the worker’s tasks and output without carrying the legal employer risk in a foreign jurisdiction.

This approach removes the need for the Dutch company to establish a Bulgarian legal entity, register as a foreign employer, or navigate Bulgarian labour law independently. It also eliminates the risk of misclassification, since the worker is formally employed rather than engaged as a freelancer. For part-time arrangements specifically, the EoR model is particularly effective because it scales: the employer pays only for the hours worked, without the overhead of maintaining a full foreign employment infrastructure.

Alternative structures exist but carry greater risk:

  • Direct employment with Bulgarian registration: Legally sound but administratively demanding for a Dutch company without local presence or HR expertise
  • Freelance or contractor engagement: Simpler in the short term but vulnerable to misclassification scrutiny in both countries
  • Dutch payroll with Bulgarian residency: Creates tax and social security non-compliance unless carefully managed with treaty relief mechanisms

The EoR route is not the cheapest option on paper, but it is consistently the lowest-risk. When weighed against the cost of back taxes, penalties, and reputational damage from non-compliance, the structured approach is the more commercially rational choice.

How Blue Lynx helps with part-time remote work across the Netherlands and Bulgaria

Blue Lynx has direct operational experience managing cross-border employment arrangements exactly like this one. As an Employer of Record with offices in both the Netherlands and Bulgaria, Blue Lynx can act as the legal employer for your Bulgarian-based remote worker, handling everything from compliant contracts and payroll to social security registration and tax obligations, without requiring you to set up a Bulgarian entity.

  • Full employment compliance under Bulgarian labour law
  • Payroll management and tax withholding in Bulgaria
  • Social security registration and A1 certificate coordination
  • English-language contracts and documentation throughout
  • Dedicated account management and HR support
  • NEN4400-1 certified and fully GDPR compliant

If your organisation is considering or already running a remote work arrangement across the Netherlands and Bulgaria, speak with the Blue Lynx team to assess your current compliance position and explore the most practical structure for your business. Contact us directly to request a competitive offer.

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