The Netherlands’ gambling authority, the Kansspelautoriteit (KSA) has warned operators that it is upping the intensity of its supervision over advertising and sports betting for this summer’s World Cup. 

In a letter sent to Dutch license holders, the KSA has reminded businesses of the country’s stringent rules over advertising and sponsorships. 

The authority has warned that any rule violations will be met with “immediate enforcement action”. 

Not every type of online betting is permitted in the Netherlands. For example, some football markets, such as the first corner kick and player bookings, are prohibited. 

The KSA will also be keeping a close eye on how it can raise awareness of gambling risks to young people. 

Michel Groothuizen, Chairman of the Board at the KSA, commented: “We saw at the 2022 World Cup and 2024 European Championship that gambling increased. 

“This makes it attractive for companies to attract new players during that period. While I understand this, I strongly urge providers to remain mindful of the protection of young adults and other vulnerable groups, and to adhere to the applicable rules. 

“If we observe that this is not happening, we will take immediate action.”

KSA flying the flag for regulation

Mounting pressure on gambling firms in the Netherlands saw 2025 online gaming revenues fall sharply, by 18.5% year-on-year, after a tax increase from 30.5% to 34.2% in January 2025, which has risen even further this year to 37.8%.

The KSA has been one of the most active regulatory bodies worldwide in dealing with gambling companies’ violations, as seen by it imposing a record €25m (£22m) fine on illegal operator Novatech, as well as warning TonyBet, Kansino and Betcity for breaching marketing regulations. 

“Share your bet”, a feature allowing punters to do exactly what it says on the tin via social media platforms, has also been banned this year, while European clubs were contacted over advertising rules not being met in UEFA Champions League and Europa League matches involving Dutch sides. 

A further warning ahead of the World Cup, which is expected to bring in a whole host of punters both new and old, shows that the regulator is doubling down on its rigorous crackdown on the Netherlands’ gambling market.