The world’s gambling regulators now oversee less than a quarter of the money flowing through online betting. A new report from Gaming Compliance International (GCI) puts global unregulated online wagering at $5.9 trillion in 2025 — larger than every national economy on the planet except the United States and China — while licensed, regulated operators control just 22% of global gross gaming revenue.
KEY FACTS AT A GLANCE
- $5.9 trillion: Global unregulated online gambling wagers in 2025, per the new GCI report
- 22% / 78%: Regulated operators’ share vs unregulated operators’ share of global gross gaming revenue
- 3rd largest: The unregulated market is bigger than every country’s GDP except the US (~$30T) and China (~$19T)
- $800 billion: Growth in unregulated wagering between 2023 and 2025
- New category: GCI now classifies online gaming into three layers — adding “unacknowledged” products like sweepstakes, social casinos, skins trading, and prediction markets
A $5.9 trillion shadow market keeps expanding
Released in May 2026, the GCI report measures the total wagering volume — every dollar staked, not just operator revenue — flowing through unlicensed sports betting, online casinos, poker rooms, crypto-only gambling sites, and lottery products worldwide. The 2025 total of $5.9 trillion is up from $5.1 trillion in 2023 and $5.7 trillion in 2024, a roughly 16% increase over two years that has accelerated in tandem with the spread of cryptocurrency rails and offshore platforms.
To put the headline number in context, only the United States (~$30 trillion) and China (~$19 trillion) generate more annual economic activity than the unregulated online gambling sector. GCI’s report ranks the market as the third-largest economic flow on the planet — ahead of Germany, Japan, India, and the United Kingdom.
Licensed operators are now a minority of the market
The headline number is staggering, but GCI’s most damning finding for regulators is the share split. According to the report, the regulated market accounts for just 22% of global gross gaming revenue — a sliver compared to the 78% generated by unlicensed and offshore operators. That means the licensed sportsbooks, state-approved casinos, and regulated iGaming platforms that pay taxes, run responsible-gaming programs, and submit to audits are now a structural minority of the worldwide online gambling economy.
“The scale of the unregulated online gambling sector is now undeniable. At $5.9 trillion in wagering value, this is one of the largest economic systems in the world.”
— Matt Holt, CEO, Gaming Compliance International
The split is even more lopsided in some individual jurisdictions. Yield Sec — the marketplace-intelligence platform that GCI acquired in November 2025 and that supplied much of the data behind the new report — found that illegal operators captured 74% of online gross gaming revenue in the United States during the first half of 2025, with 82% of all online-gaming advertising exposure pointing audiences toward unlicensed sites.
The third layer: GCI’s “unacknowledged” segment
The report’s most consequential framing shift is conceptual rather than numerical. For years, regulators and industry analysts split the online gaming market in two: licensed (regulated) and offshore (unregulated). GCI’s 2025 report adds a third tier — an “unacknowledged” layer of products that mimic gambling mechanics without always being legally classified as gambling.
This bucket includes sweepstakes-model casinos, social casinos, skins trading on game-item marketplaces, money-prize TikTok contests, pseudo-investment products that pay out on event outcomes, and — most consequentially — prediction markets like Polymarket and Kalshi. Intercontinental Exchange’s reported $2 billion acquisition of Polymarket in October 2025 valued the prediction-market category at roughly $9 billion institutionally, and Kalshi alone took an estimated $1.2 billion in Super Bowl trades against a total Super Bowl prediction-market volume of $3.1 billion.
- Licensed sportsbooks
- State-approved online casinos
- Regulated iGaming platforms
- National lotteries
- Land-based casino digital arms
- Unlicensed sportsbooks
- Offshore online casinos
- Illegal poker rooms
- Crypto-only casinos
- Illegal lottery platforms
- Sweepstakes casinos
- Social casinos
- Skins trading
- Money-prize TikTok contests
- Prediction markets
- Pseudo-investment products
GCI President Ismail Vali, who founded Yield Sec and joined GCI when the company was acquired, characterized this fragmentation in blunt terms: “The market has essentially fragmented at each level.” The report itself describes the marketplace as having split “in every jurisdiction” into the three segments, “accelerating consumer confusion, unregulated growth, and regulatory complexity at scale.”
For regulators, the practical problem is that products in this third layer don’t fit existing gambling-licence frameworks. Prediction markets, for example, are overseen in the United States by the Commodity Futures Trading Commission as financial products — not by state gaming commissions — even though the user-facing experience of placing a real-money bet on a sports event is nearly identical to a regulated sportsbook wager. We’ve covered this collision between sportsbooks and exchanges previously in our piece on the DraftKings–Kalshi power shift, and the $2 billion ICE–Polymarket deal is the deal that cemented prediction markets as a $9 billion institutional category in the first place.
Regulators are playing catch-up — jurisdiction by jurisdiction
The GCI numbers land in the middle of a wave of national-level responses to offshore and unlicensed online gambling, but each is fighting only a slice of the $5.9 trillion total. Germany has been tracking hundreds of millions of euros leaking into Europe’s offshore gambling crisis, the Czech Republic’s recent black-market report points to the same offshore-leakage pattern, and Turkey is cracking down through banking channels. In Asia, the Indonesian government has launched its own crackdown on unlicensed sites.
In the United States, the response has been fragmented across state lines. Several states have moved against the “unacknowledged” layer directly, with sweepstakes-casino bans advancing in Indiana, Maryland, Mississippi, Tennessee, and California, and multiple states (including Tennessee, Nevada, and Arizona) taking action against prediction-market operators. The American Gaming Association has separately estimated that Americans alone wager more than $500 billion per year with unlicensed operators.
GCI is positioning its own platform — built around Yield Sec’s monitoring technology, which the company says tracks more than two billion transactions per day in some jurisdictions — as the answer for regulators trying to claw back share. “We work with regulated gaming jurisdictions to drive fiscal growth through accurate tax reporting, fighting back against the illegal operators,” CEO Matt Holt said in a statement around GCI’s headline sponsorship of the ICE World Gaming Forum in Barcelona.
CAVEAT ON THE METHODOLOGY
GCI’s $5.9 trillion figure measures total wagering volume — every dollar staked, including stakes that are immediately returned as winnings on the next bet — not net operator revenue. That convention is standard for handle-based reporting, but it means the $5.9 trillion number is not directly comparable to a country’s GDP (which measures value-added economic output). It is, however, the same metric regulators use when sizing the markets they oversee.
KEY TAKEAWAYS
- $5.9T is now the headline benchmark — GCI’s number is the new reference point for any conversation about online-gambling regulation, replacing older offshore-market estimates.
- The licensed market is structurally a minority — 22% of global GGR isn’t a temporary dip; it reflects years of unregulated growth outpacing licensing expansion in most jurisdictions.
- “Unacknowledged” is the regulatory blind spot — sweepstakes, social casinos, skins trading, and prediction markets sit in gaps between gambling and financial-product law, which is why state-level bans keep multiplying.
- Crackdowns are local; the market is global — Germany, the Czech Republic, Turkey, Indonesia, and US state legislatures are each fighting one piece of a single offshore ecosystem.
- GCI is positioning itself as the data layer — the post–Yield Sec entity is selling itself as the monitoring platform regulators can use to actually quantify and disrupt black-market activity in their jurisdictions.
Sources
- GCI acquires Yield Sec — Gaming Compliance International (official announcement)
- GCI named headline sponsor of ICE World Gaming Forum — ICE Gaming / Clarion
- Matt Holt named CEO of Gaming Compliance International — iGaming Business
- “The scale of the unregulated online gambling sector is now undeniable”: GCI estimates US$5.9tn in wagers during 2025 — Tribuna
- Unregulated Online Gambling Brings In $5.9 Trillion Yearly, GCI Report States — GamblingNews
- 74% of US GGR went to black market in H1 2025, claims Yield Sec — NEXT.io
- Americans gamble more than half a trillion dollars illegally each year — American Gaming Association
