The Czech Ministry of Finance has officially added the decentralised prediction market platform Polymarket to its blacklist of unauthorised internet games. The regulatory decision mandates that local internet service providers (ISPs) and financial institutions block access to the site and halt transactions associated with the domain, marking a significant escalation in European regulatory scrutiny over crypto-based betting platforms.
According to the Ministry’s regulatory assessment, Polymarket’s structural design, which allows users to wager cryptocurrency on the outcomes of real-world events, politics, and pop culture, falls under the legal definition of online gambling under Czech law. Because the platform operates without a domestic licence from the Ministry of Finance, its activities have been deemed unauthorised.
The administrative move gives local internet service providers a strict 15-day window to comply with the access blocking order. The development positions the Czech Republic alongside a rapidly expanding group of European nations taking a firm legal stance against prediction markets, following similar regulatory clampdowns in France, Germany, Romania, Spain, and Belgium.
The Scale of the Czech Black Market: IPRH Data
The ban on Polymarket comes amid a broader, alarming expansion of unauthorized gambling across the country. According to a comprehensive research initiative conducted by the Czech Institute for Gambling Regulation (IPRH), the country is currently facing an unprecedented influx of unlicensed betting services.
The IPRH recently presented two independent expert studies alongside its updated Black Book of Illegal Gambling, revealing that the regulated market is facing severe pressure. Jan Řehola, Director of the Institute for Gambling Regulation, presented data showing that Czech players are losing massive amounts of capital to unregulated offshore networks, resulting in substantial losses to state public funds.
Commenting on the specific threat of decentralised platforms and the necessity of the state’s intervention, Řehola stated:
Prediction markets are not harmless technological novelties. They involve betting on real-world events, often without clear accountability to the state, without standard player-protection measures and without the rules that apply to legal gambling. If something looks like a bet, functions like a bet and allows people to win or lose money depending on the outcome of an uncertain event, we cannot stop treating it as gambling simply because it is called a contract. We therefore consider the Ministry of Finance’s decision to add Polymarket to the List of Unauthorised Internet Games an important step confirming that the same rules must apply to everyone.
The scale of this issue is highlighted by key findings from the IPRH report:
- The Operator Imbalance: The Czech market currently features just 27 legally compliant, licensed operators competing against a staggering 1,113 illegal brands actively targeting local citizens.
- Massive Economic Losses: Czech players lose an estimated CZK 14.5 billion (~$620 million USD) annually to illegal operators. This translates to over CZK 330 million monthly in lost tax revenues that bypass the state budget entirely.
- Failed Online Exclusions: The effectiveness of the state’s Register of Excluded Persons (REP), designed to block vulnerable citizens, insolvents, and those undergoing addiction treatment, fails significantly online. IPRH data shows that a worrying 66.2% of individuals listed in the register admit to bypassing blocks to gamble with illegal operators occasionally or regularly.
The Migration to Unregulated Digital Platforms
The blacklisting of Polymarket highlights a major trend identified by European sociological and economic researchers: illegal gambling is rapidly shifting away from traditional offshore web casinos toward highly decentralised, anonymous digital ecosystems.
The structural evolution of the black market has made enforcement increasingly difficult for local authorities. In presenting the sociological data, researcher Mgr Robert Klobucký, Ph.D., noted:
The data show that illegal gambling is a mass phenomenon affecting hundreds of thousands of people across the population. A significant portion of these users are playing on illegal sites without even realising their provider lacks a licence.
According to the IPRH, the domestic illegal market has increasingly diversified into several unregulated digital categories:
- Anonymous Crypto-Casinos: Platforms that bypass standard banking systems by operating exclusively with digital assets and requiring zero Know-Your-Customer (KYC) onboarding.
- Web3 Prediction Markets: Portals like Polymarket that package sports, political, and financial betting as decentralised information protocols, avoiding the scrutiny typically applied to bookmakers.
- Telegram Betting Bots: Closed-loop messaging networks running automated betting programs directly inside social applications, completely invisible to public web filters.
- Gaming Communities: Interactive virtual networks where minors are frequently targeted, exposing them to skin betting and casino-style mechanics before they reach the legal age of 18.
A Coordinated Global Crackdown on Prediction Markets
The action taken by the Czech Ministry of Finance is part of a rapidly expanding global backlash against unlicensed decentralised betting platforms. Jurisdictions worldwide are systematically auditing prediction markets through the lens of local gaming and financial laws rather than treating them as novel Web3 software.
The Czech block follows similar decisive state actions across diverse jurisdictions, including:
- Latin American Enforcement: The administrative move reflects the earlier move of the Brazilian government ban on prediction markets, which targeted unlicensed financial derivatives and betting structures.
- Southeast Asian Precedents: Regulatory enforcement has also accelerated in Asia, mirroring the action when Indonesia blocked Polymarket and targeted crypto wagering domains to curb unregulated offshore gambling.
- Regional South American Blocks: The European move also aligns with recent regional policies in the Americas, such as Argentina’s nationwide block on Polymarket, which similarly banned the portal for bypassing national licensing and tax structures.
Systemic Risks to Local Legal Operators
The tolerance of Web3 betting platforms has drawn sharp criticism from the licensed Czech business sector. Under current regulatory frameworks, compliant platforms face strict tax rates—specifically 30% of gross gaming revenue (GGR) for live games and sports betting, and 35% for technical games—alongside mandatory contributions to player protection systems. Domestic businesses argue that allowing unregulated prediction platforms to operate freely creates an incredibly uneven playing field for the legitimate online gambling industry in Czechia.
Major stakeholders, including representatives from BONVER WIN, Fortuna Game, Tipsport, and SAZKA, have collectively warned that illegal platforms actively undermine the domestic industry’s financial stability. Without tax contributions or KYC hurdles, black-market operators can offer statistically better payouts while spending heavily on digital marketing, leaving licensed partners at a distinct disadvantage.
As European regulators increasingly align under updated digital finance and anti-money laundering frameworks, platforms that previously operated in regulatory grey areas are being actively pushed to either comply with local licensing procedures or face comprehensive domain blocks. For the wider prediction market sector, the Czech Ministry of Finance’s decision demonstrates that decentralised operations will face the exact same compliance expectations, player protection demands, and fiscal obligations as traditional online sportsbooks and casinos.