Every regulated gambling market shares a common rival: operators that serve customers without a local license. These unlicensed sites do not pay local taxes, do not follow advertising rules and do not offer the protections that licensed operators are required to provide. Estimating their size is difficult, but most regulators agree the black market is large and, in many places, growing. Understanding why it persists explains much of the current debate over gambling regulation.
How Big Is the Black Market?
Measuring an illegal market is inherently imprecise, and estimates vary widely depending on methodology. In the UK, one widely cited estimate puts UK black-market betting volume at around £16.6 billion in stakes, roughly three times the 2019 level. In the United States, competing reports have sized unlicensed online gambling revenue at anywhere from tens of billions of dollars to nearly $100 billion a year — a gap that reflects different definitions, data sources and, sometimes, the interests of whoever commissioned the research.
Whatever the precise figure, the direction is clear enough that regulators are devoting more resources to the problem.
Why Players Go Offshore
People use unlicensed sites for a range of reasons. Some are attracted by larger bonuses, higher betting limits or games that are not available locally. Others want to pay with cryptocurrency, which many licensed operators do not accept. Some want to avoid identity checks, affordability assessments or deposit limits that licensed sites must apply.
More concerning are players who have self-excluded from licensed gambling and turn to offshore sites precisely because those sites do not check national self-exclusion registers. For them, the black market removes the very safeguards they chose to put in place.
Why It Matters
For players, the risks are real. Unlicensed operators are not bound by local rules on fair games, segregation of customer funds or complaint handling. If a dispute arises over withheld winnings, there may be no regulator to turn to and no practical legal route to recovery. Personal and payment data may be handled with little oversight.
For the wider market, the black market undermines integrity monitoring, deprives governments of tax revenue and puts licensed operators at a competitive disadvantage.
The Regulator’s Toolkit
Authorities use several overlapping tools. Website blocking is one of the most visible. Australia has made extensive use of it, and the blocking of offshore casino sites in Australia has now passed 1,700 illegal gambling and affiliate websites since the program began in 2019.
Payment blocking is another approach, asking banks and payment providers to refuse transactions with known unlicensed operators. Regulators also target the marketing ecosystem: affiliates, social-media promoters and streamers who direct players to illegal sites. In the UK, the regulator has created a dedicated senior role focused on illegal markets and joined a government-backed taskforce to coordinate enforcement.
The Channelization Debate
The hardest question is how regulation itself affects the black market. Licensed operators argue that heavy taxes, strict affordability checks and tight limits push customers offshore, and that a regulated market only protects players if most of them actually use it. This concept, known as channelization, is central to how many regulators think about policy.
Campaigners counter that industry estimates of the black market are sometimes inflated to argue against new rules, and that protections should not be weakened simply because some players will seek to avoid them. The evidence is contested, and the right balance likely differs from one country to another.
How Players Can Protect Themselves
The simplest safeguard is to check that any gambling site holds a license from the regulator in your country, and to verify it on that regulator’s official register rather than trusting a logo. Be cautious of sites that advertise no identity checks, unusually generous bonuses or acceptance of players from everywhere. If you have self-excluded, offshore sites are not a safe alternative; support services exist for exactly that situation.
The Takeaway
The gambling black market is a persistent challenge that no regulator has fully solved. Blocking, payment controls and marketing enforcement can shrink it, while sensible regulation can make licensed play more attractive. For players, the message is straightforward: the protections that come with a license are worth more than any bonus an unlicensed site can offer.