A Belgian Home Office Can Split One Dutch Salary Three Ways

Cross-border flexibility works only when tax, insurance and workday records move together.

A Dutch consultancy hires an experienced employee who lives near Antwerp. The office is in Breda, clients are mainly Dutch, and two homeworking days make the role attractive. The contract names both locations, payroll receives the salary details, and the first month begins.

Then three questions arrive. Could the Belgian home office create a taxable business presence? Where is the salary taxed? Which country covers the employee’s social security? They sound like versions of one issue. They are not.

That distinction sits behind Dutch work on the Benelux Parliament’s recommendations for cross-border telework. In March 2026, the government informed the Senate that the subject had been placed on the Benelux agenda for that year. The policy direction is towards greater coordination. Employers still work with separate tax, payroll and insurance systems.

One employee, three assessments

The clearest certainty concerns permanent establishments. In 2023, the Netherlands and Belgium clarified how their existing tax treaty applies when an employee works from home across the border. Homeworking for up to half of annual working time does not, by itself, create a permanent establishment for the employer.

That handrail has a defined job. It concerns the foreign home office as a possible taxable business presence. Salary taxation, payroll withholding and social-security coverage require their own assessment. The Dutch-Belgian arrangement also leaves other countries, such as Germany, to their own rules.

A founder may hear “50 per cent” and conclude that the case is settled. In practice, that percentage answers one question. The same working pattern still has to pass through employment-tax and social-security rules.

A remote-work clause cannot carry the entire arrangement. The contract records what employer and employee intended. Payroll needs to reflect what actually happened. If two Belgian home days become three, client work in the Netherlands increases, or the pattern changes informally, the original wording loses much of its practical value.

The calendar has tax consequences

Belastingdienst guidance starts from a familiar treaty principle: employment income may be taxed where the work is physically performed. The often-quoted 183-day exception is a set of conditions, not a simple permission to work abroad for 182 days.

Three conditions work together. The employee must remain within the relevant treaty day limit. The employer must not be resident in the work country. The wage cost must not be borne by a permanent establishment or permanent representative there. The treaty and the facts determine the result.

Day counting also catches many employers by surprise. For Dutch treaty calculations, time in the work country can include weekends, sick days, public holidays, leave and holidays. Part of a day can count as a full day. The relevant measurement period may differ between treaties.

For a small employer, this is less about tax theory than the monthly payroll input. Does it still match the employee’s actual movement? Calendars, travel claims and timesheets often sit in different systems. When an adviser later asks where work was performed, the answer can depend on reconstructed memories.

The Breda consultancy may be comfortable on the permanent-establishment question while still needing a reliable allocation of Belgian and Dutch workdays. The employee may also have filing obligations in both countries. A clean Dutch payslip is not the same as a completed cross-border position.

Social security follows its own route

Social security adds another layer. Rijksoverheid explains that working outside the Netherlands can change the legislation under which someone is insured. The consequences can reach employee insurance, healthcare arrangements and pension accrual, including the Dutch AOW position.

European arrangements offer a route for eligible, structured cross-border telework. Under the framework described by the Dutch government, an employee may work from the country of residence for up to half of total working time while remaining covered in the employer’s country, provided the conditions are met. This is a social-security arrangement, not a salary-tax exemption.

The separation matters at the kitchen table as much as in payroll. Employees usually ask what will reach their bank account. Later questions may concern health insurance, pension accrual or contributions paid under the wrong system. A benefit offered in good faith can become an uncomfortable correction exercise for both sides.

A small company does not need a multinational mobility department for one Belgian resident. It does need someone who knows which employees regularly work abroad, which pattern was approved, how changes are reported, and when payroll or an adviser should review the consequences.

Make flexibility visible

A dependable record connects the employment agreement, the expected work pattern, actual work locations, approved deviations, payroll treatment and relevant social-security documentation. The exact material depends on the case. The governing principle is simple: the business should be able to explain why payroll followed the route it did.

There is also a margin question. Cross-border flexibility can improve recruitment and retention, especially in software, design, engineering, sales and professional services. Yet the administration has a cost. Adviser time, payroll changes and periodic reviews belong in the real cost of employing that person.

On a low-margin contract, ignoring those hours merely moves the cost into the founder’s evenings. Benelux coordination may reduce friction later, but it will not maintain today’s workday record. That responsibility remains with the company.

Back in Breda, the hiring decision may still be entirely sensible. The employee gains flexibility, the employer gains scarce experience, and the border is a short drive away. The administrative border is wider. Good records make it passable without turning an ordinary homeworking agreement into a recurring surprise.

The data, sourcing, and analysis behind this article were conducted by Linda Pavan Geraedts. AI was not used to identify sources, build the factual basis, or produce the analytical judgment contained here. AI was used only as a drafting aid. The final English text was personally reviewed, edited, and approved by Linda Pavan Geraedts before publication.

References

• Nederland zet in op afspraken over grensoverschrijdend telewerk - Taxence
• Rijksoverheid - Latest Dutch policy position on Benelux cross-border telework
• Rijksoverheid - Benelux recommendation and policy ambition
• Rijksoverheid - Permanent-establishment risk for Netherlands-Belgium homeworking
• Belastingdienst - Wage-tax allocation and the 183-day treaty test
• Belastingdienst - Netherlands-Belgium treaty position for employees
• Rijksoverheid - Social-security exposure remains a separate track
• Rijksoverheid - Practical consequences of losing Dutch social-security coverage