The Benelux Union is an intergovernmental cooperation between the governments of Belgium, the Netherlands, and Luxembourg. Since 2008, the Benelux has been officially known as the Benelux Union. The Benelux originated from a monetary and customs agreement signed by the governments-in-exile of Belgium, the Netherlands and Luxemburg in 1943 and 1944 respectively. The monetary agreement aimed to facilitate payments between the Netherlands and the Belgian-Luxembourg Economic Union. Through this treaty, the exchange rate between the Dutch Florin and the Belgian Franc was fixed.[1] The 1944 customs agreement sought to establish the foundation for the Benelux Economic Union. Import duties between the Netherlands and the Belgian-Luxembourg Economic Union were suspended. All three countries were represented in a newly formed administrative council responsible for ensuring the equal application of provisions regarding import duties and excise taxes through measures affecting all three member states. The council was assisted by a committee that issued binding rulings on customs disputes. Additionally, two other councils would be established: the Economic Union Council and the Trade Agreements Council. The latter council was responsible for harmonising the agreements that the Netherlands and the Belgian-Luxembourg Economic Union had concluded with third countries.[2]
In 1948, the Customs Agreement came into force. As mentioned earlier, the Customs Agreement aimed to eliminate import duties on internal trade within the Benelux and establish a common external tariff for trade with non-members. In 1954, it was agreed that capital could move freely among the three countries. This meant, for example, that citizens of Belgium and Luxembourg could invest their capital in the Netherlands, while Dutch citizens were granted the right to invest their money in the Belgian-Luxembourg Economic Union.[3] In 1960, the first agreement (First Capital Directive) was reached within the European Community to phase out certain restrictions on private and commercial capital movements. It was not until 1 July 1990 that the free movement of capital was fully liberalised for all citizens of the member states of the European Union. The Benelux was therefore a pioneer in this field.[4]
However, it was not until 1958 that the Benelux Economic Union was officially established through the Benelux Treaty. The treaty was implemented in 1960. The Benelux Treaty had three main objectives. Belgium, the Netherlands and Luxembourg sought to establish a common trade policy towards third countries through a free trade area within the Benelux. The three countries also declared their ambition to coordinate their social, economic and social policy to improve economic conditions for all three member states by increasing employment and aiming for the highest possible standard of living for its citizens. Another objective was the facilitation of free movement of people, capital, services and goods within the Benelux. These objectives were realised through the Benelux Treaty. The primary goal for the Benelux Economic Union was to strengthen the economic growth of the member states. This economic growth was to be utilised for the betterment of the social and personal well-being of the peoples of the Benelux.[5]
Many of the original objectives of the Benelux have been adopted by the European Union. The Benelux Union promotes itself as a testing ground for the European Union. Both the Benelux and the EEC aimed to eliminate trade barriers, tariffs and restrictions to the movement of goods, capital and people.[6] Today, the Benelux Union focuses on cooperation in areas such as the mutual recognition of diplomas, water management, pooling economic and political resources to advance its interests internationally, and close colloboration in combatting crime.[7] In recent years, the Benelux Union has also pursued cooperation with regions and countries beyond its borders, including the German state North-Rhine Westphalia and French regional governments. The Benelux works with these governments on various topics such as energy, mobility, air quality and the circular economy.[8] The new Benelux treaty, signed on 17 June 2008, came into force on 1 January 2012. With this treaty, Belgium, the Netherlands and Luxembourg reaffirmed their commitment to continuing the Benelux Economic Union and supporting cross-border cooperation among the three member states. The treaty also places special emphasis on cooperation in justice, sustainability and domestic affairs. Notably, the treaty explicitly states the ambition of the Benelux Union to be a frontrunner within the European Union.[9]
The Benelux Union has continued to seek new ways to enhance cross-border cooperation. In 2014, the scope of cross-border cooperation extended beyond the borders of the Benelux. With this treaty, all governmental levels and public institutions were allowed to initiate cooperation with neighbouring countries both within and outside the Benelux if they were signatories to the 2014 agreement. France, Germany and the United Kingdom were permitted to become signatories as well.[10] In March 2026, the Benelux nations signed a new treaty to further enhance cross-border cooperation in combatting social dumping and social fraud. With this treaty, the three countries have committed to coordinated controls and inspections related to social benefits, the posting of workers and working conditions.[11]
What is the organisational structure of the Benelux Union?
Currently, the Benelux Union has five institutions to support its activities. The primary decision-making body is the Benelux Committee of Ministers. This institution determines the general political direction and priorities of the Benelux Union. At least one minister from each country is represented in the committee. The second institution is the Benelux Council. In this council, senior officials assist the ministers on various dossiers concerning the Benelux Union. The third major institution is the Secretariat-General. This institution supports, monitors and initiates cooperation in policy areas such as safety, sustainability and the economy. The fourth institution is the Benelux Parliament, officially known as the Benelux Interparliamentary Assembly. The individual parliaments of the member states are represented here by a common delegation of 49 members. The members of this assembly are required to advise and inform their respective governments on issues that affect the entire Benelux. Normally, the Benelux Interparliamentary Assembly meets three times a year. The fifth institution is the Benelux Court of Justice. This court is responsible for interpreting common rules of law between Belgium, the Netherlands and Luxembourg. This means that questions regarding these common rules of law must be directed to the Benelux Court of Justice by the national courts of the respective countries. Magistrates from the Benelux Court of Justice are selected from the courts of cassation or appeals from all three countries. The court addresses issues in areas such as penalty payments and intellectual property.[12]
[1] Dutch Ministry of Foreign Affairs, “No. 21. Belgo – Luxembourg – Netherlands Monetary Convention,” in Treaty Series: Volume 2, edited by the United Nations, https://www.benelux.int/wp-content/uploads/2023/02/accords-monetaires-1943.pdf, 281-298.
[2] Kamerstuk 1946-1947, 433 nr. 2, March 27, 1947, page 4-5, https://zoek.officielebekendmakingen.nl/0000076849.
[3] “History,” About us, Benelux Union, accessed April 24, 2026, https://www.benelux.int/en/information-for-citizens/benelux-union/about-us/history/; “Tractatenblad van het Koninkrijk der Nederlanden,” Ministerie van Buitenlandse Zaken, accessed April 24, 2026, https://zoek.officielebekendmakingen.nl/trb-1954-89.
[4] “Free movement of capital,” The internal market, European Parliament, last modified November 2025, https://www.europarl.europa.eu/factsheets/en/sheet/39/free-movement-of-capital.11.
[5] “Verdrag tot instelling van de Benelux Economische Unie, ‘s-Gravenhage, 03-02-1958,” Regeling, Overheid.nl, accessed May 7, 2026, https://wetten.overheid.nl/BWBV0005047/1999-09-01?g=2010-04-13&z=2010-04-13.
[6] “The internal market,” European Parliament, accessed 9 May 2026, https://www.europarl.europa.eu/factsheets/en/section/189/the-internal-market; “Our organization,” Benelux Union, Benelux, accessed May 8, 2026, https://www.benelux.int/en/information-for-citizens/benelux-union/our-organisation/.
[7] “Wat is de Benelux? Buitenlandse Zaken in begrijpelijke taal,” Ministerie van Buitenlandse Zaken, accessed May 2, 2026, https://www.rijksoverheid.nl/ministeries/ministerie-van-buitenlandse-zaken/het-werk-van-bz-in-de-praktijk/weblogs/2023/wat-is-de-benelux.
[8] “Benelux Union,” About us, Benelux, accessed May 2, 2026, https://www.benelux.int/en/information-for-citizens/benelux-union/about-us/; “Benelux +,” Benelux, accessed May 9, 2026, https://www.benelux.int/nl/info-burgers/benelux/; “Hauts-de-France,” Benelux+, accessed May 9, 2026, https://www.benelux.int/nl/info-burgers/benelux/frankrijk/; “Noordrijn-Westfalen: een regio met een grote dynamiek en innovatiekracht,” Benelux+, accessed May 9, 2026, https://www.benelux.int/nl/info-burgers/benelux/noordrijn-westfalen/.
[9] “Verdrag tot instelling van de Benelux Unie, ’s-Gravenhage, 17-06-2008,” Regeling, Overheid.nl, accessed May 9, 2026, https://wetten.overheid.nl/BWBV0003087/2008-06-17?g=2008-06-17&z=2008-06-17.
[10] “Benelux-Verdrag inzake grensoverschrijdende en interterritoriale samenwerking, ‘s-Gravenhage, 20-02-2014,” Regeling, Overheid.nl, accessed May 9, 2026, https://wetten.overheid.nl/BWBV0006323/2019-01-01#Verdrag_Verdragtekst_Hoofdstuk5_Artikel27.
[11] “Belgium, the Netherlands and Luxembourg sign a Benelux Treaty against social fraud,” Benelux, March 9, 2026, https://www.benelux.int/en/post/belgium-the-netherlands-and-luxembourg-sign-a-benelux-treaty-against-social-fraud/.
[12] Benelux, “Our organization.”