DailyDime

Michigan won the national championship last night. The Masters tees up Thursday. Here’s everything you need to know about the business behind sports betting.

The Perfect Storm

Last night, the Michigan Wolverines beat the UConn Huskies for the 2026 NCAA Men’s Basketball Championship at Lucas Oil Stadium in Indianapolis. Michigan had opened as a 6.5-point favorite, and bettors were right there with them: the Wolverines pulled in 70% of the bets and 75% of the money at BetMGM heading into tip-off.

Two days from now, Scottie Scheffler tees it up as the betting favorite at Augusta National, where the 2026 Masters Tournament begins Thursday and runs through Sunday.

This is not a coincidence. The last week of March Madness overlapping with the opening of Masters week is, by virtually any measure, one of the biggest sports betting weeks of the calendar year. You’ve got the culmination of three weeks of nonstop bracket action colliding with the most-wagered golf major on the planet. Two events, two audiences, one very profitable week for sportsbooks around the world.

So how big is this industry, really? And where did all of this money come from? The short answer: it came from you, your phone, and a 2018 Supreme Court ruling that changed everything.

A $88 Billion Industry (and Climbing Fast)

The global sports betting market hit approximately $88 billion in revenue in 2025, according to Statista’s Market Insights. That figure covers legal, regulated wagers, not including the hundreds of billions flowing through illegal and offshore markets, particularly in Asia. When you add those in, total betting volume across individual events like the FIFA World Cup or the Indian Premier League can dwarf the legal figures by orders of magnitude.

For context, that $88 billion is just sports betting. The broader gambling market (lotteries, casinos, and online gaming) is projected to exceed $650 billion in global revenue this year. Sports betting represents roughly 13% of the total pie, but it’s the fastest-growing slice. The online sports betting segment alone is on a trajectory to double by the early 2030s, fueled by mobile apps, live in-play wagering, and a wave of legalization across new markets.

In the U.S., the story is even sharper.

The U.S. sports betting industry has experienced explosive growth since the 2018 Supreme Court decision that overturned the federal PASPA ban, allowing individual states to legalize and regulate wagering on sports. As of 2026, legal sports betting is available in approximately 38–40 states plus Washington, D.C. (with variations between retail and mobile/online access), where the vast majority of activity occurs through user-friendly mobile apps and websites.

In 2025, Americans legally wagered a record $166.94 billion (the “handle”) on sports, generating $16.96 billion in gross gaming revenue (GGR) for operators, a 22.8% increase from the prior year, while contributing $3.71 billion in tax revenue to states.

The market is heavily dominated by online/mobile betting and a handful of major operators, with FanDuel and DraftKings together commanding the lion’s share of revenue. Top-performing states include New York, Illinois, and New Jersey, though seasonal spikes tied to major leagues like the NFL, NBA, and NCAA basketball drive significant volume nationwide. Despite competition from emerging prediction markets and ongoing debates over further expansion, the industry remains a key driver of the broader US commercial gaming sector, which hit a record $78.72 billion in total GGR in 2025.

Potential Size if Legalized in All States

If sports betting were fully legalized and regulated in all 50 states with open, statewide markets (including robust mobile access), the legal market could more than double in scale. According to a Tax Foundation analysis, nationwide legalization would add an estimated $15.6 billion in annual gross gaming revenue, pushing the total legal GGR well above $30 billion per year (based on current levels).

This expansion would also generate roughly an additional $1.6 billion in annual state tax revenue (assuming an average 10% GGR tax rate), with the largest gains expected in populous holdout states like California, Texas, and Florida. Long-term industry projections, factoring in continued mobile adoption and market maturation, suggest the US sports betting revenue could reach the low-to-mid $30 billion range by 2030 even without full legalization, implying even higher potential with nationwide access.

Legal vs. Illegal Sports Betting

While the legal, regulated market has grown rapidly, a substantial illegal (or “black market”) segment persists. In recent estimates, Americans wager approximately $84 billion annually through illegal bookies and offshore sportsbooks, generating about $5 billion in revenue for those unregulated operators and costing states roughly $1 billion in lost tax revenue each year. This illegal share of the total US sports betting market has declined from around 36% in 2022 to about 24% today, thanks to the expansion of convenient and trustworthy legal options.

However, one in ten sports bettors still uses only illegal sources, drawn by factors like better odds, fewer restrictions, or lack of awareness. Illegal operators offer no consumer protections, age verification, responsible gaming tools, or recourse for disputes, while also enabling potential money laundering. In contrast, the legal market provides regulated integrity, contributes billions in taxes to public services, and supports problem-gambling resources—highlighting why many advocates push for broader legalization to shift more volume from the unregulated black market into the taxed, safer legal framework.

PASPA, the Supreme Court, and the Dam Breaking

For most of American history, legal sports betting was confined almost entirely to Nevada. The Professional and Amateur Sports Protection Act of 1992 (known as PASPA) effectively banned it everywhere else. That changed on May 14, 2018, when the Supreme Court struck down PASPA in Murphy v. NCAA, ruling 6-3 that the federal law violated the anti-commandeering doctrine of the Constitution. States were now free to regulate sports betting as they saw fit.

The floodgates opened. New Jersey went live within days. Within a few years, state after state followed. As of 2025, 36 states have legalized sports betting, and 30 have fully operational markets. States like New York, Pennsylvania, and Illinois now generate billions in annual handle. The holdouts, Utah and Hawaii for instance, remain philosophical outliers in an otherwise rapidly consolidating legal landscape.

The timing also mattered. Smartphones had already conditioned an entire generation to conduct their financial lives from an app. Sportsbooks didn’t have to teach people how to place a bet; they just had to build a clean interface and offer a signup bonus. Mobile now accounts for the overwhelming majority of legal wagers placed in the U.S., and roughly 80% of gamblers globally were using their phones for it in 2025.

Who’s Betting, and Where

The global sports betting market is not evenly distributed. Europe dominates the regulated online sports betting space, holding roughly 41-50% of market share depending on the segment. The UK is the most mature single market, with a long-established gambling culture, a Gambling Commission regulatory framework dating to 2005, and a population that treats a bet on the Grand National as something close to a national obligation. Italy, Germany, Spain, and France all operate substantial licensed markets as well.

North America is the fastest-growing region, largely because of the post-PASPA boom. The U.S. market alone was valued at $17.94 billion in 2024 and is projected to grow at a CAGR of nearly 11% through 2030. Canada has followed suit, with Ontario operating a fully licensed private-operator market since 2022. Brazil legalized online sports betting in 2023 and is expected to register the highest CAGR in Latin America through 2030, a country of over 200 million people deeply passionate about football and increasingly connected via mobile.

Asia presents a different picture. Many of the largest markets: China, Japan, South Korea either prohibit or heavily restrict sports betting. Yet the betting volume is enormous anyway, flowing through offshore and illegal channels. The Indian Premier League alone generates estimated wagering of $150 billion per season, the vast majority of it through offshore books. India has state-level variations in gambling law but no comprehensive national framework permitting private online sportsbooks.

Australia is among the most open markets globally, with regulated sports betting legal nationwide since 2001 and a mobile-first betting culture that punches well above its weight for a country of 26 million people.

The Biggest Betting Events in the World

Not all sports are created equal when it comes to betting volume. Here’s how the top events stack up globally: where does last night’s NCAA championship and this week’s Masters fit in?

The overlap between last night’s championship game and Masters week is exactly why early April has become a marquee moment for sportsbooks. March Madness alone is projected to generate $3.3 billion in legal U.S. wagers for the 2026 men’s and women’s tournaments combined, making it one of the most important demand spikes of the year. Add in The Masters, which Entain ranked as the third most-bet sporting event globally in 2025, and you have a genuine convergence of two of the top-10 wagering events on the planet hitting simultaneously.

Who’s Running the Books

In the U.S., two companies have turned sports betting into a genuine duopoly. FanDuel, owned by Irish conglomerate Flutter Entertainment, and DraftKings together command roughly two-thirds of the U.S. market. FanDuel held approximately 43% of national gross gaming revenue as of early 2025, with DraftKings close behind at around 32%. The gap has fluctuated. DraftKings briefly reclaimed the handle lead in mid-2025, but the two have traded positions atop the market consistently since 2018.

Below them, the competition for third place remains fierce but distant. BetMGM, the joint venture between Entain and MGM Resorts, is the most consistent challenger. Caesars Sportsbook is the other major brick-and-mortar casino brand with a meaningful digital footprint. ESPN BET, launched in 2023 through a partnership with Penn Entertainment, entered the market with significant media distribution behind it. Fanatics Sportsbook has been building through its existing relationship with sports merchandise customers. None of these has come close to closing the gap on the top two.

Globally, the picture is different. Bet365, a privately held company headquartered in Stoke-on-Trent, England, is arguably the world’s dominant online sportsbook by revenue outside the U.S., operating in dozens of regulated markets across Europe, Asia, and beyond. Flutter Entertainment, FanDuel’s parent, is actually a global operation; it also owns Paddy Power and Betfair in Europe. Other major international players include William Hill (now owned by 888 Holdings), Entain’s various brands including Coral and Ladbrokes, and Kindred Group.

How the Business Model Actually Works

Understanding sports betting economics starts with one number: the hold. The hold, also called the vig or juice, is the percentage of all money wagered that a sportsbook retains after paying out winners. On a standard -110 bet (you risk $110 to win $100), the implied hold on a two-sided market is about 4.5%. In practice, sportsbooks target structural holds in the 7-10% range across their full mix of bet types.

FanDuel achieved a 14.5% structural hold in Q4 2024: meaningfully higher than DraftKings’ 10.5% in the same period, and a significant competitive advantage since it means FanDuel retains more revenue on each dollar wagered. Parlay bets, which require multiple outcomes to all be correct, carry a significantly higher implied hold than straight bets. The explosion in parlay betting: particularly same-game parlays has been a major driver of industry revenue growth, since bettors systematically overvalue them.

The other major economic dynamic is customer acquisition. Sportsbooks spent aggressively on bonuses and promotions in the early post-PASPA years, essentially subsidizing their way to market share in newly opened states. That model has matured: as a Morgan Stanley survey noted, ease of use has replaced bonuses as the top factor bettors cite when choosing a platform. The customer acquisition cost per user has come down as brand recognition solidified, though the market remains competitive enough that promotional spending around major events like March Madness stays elevated.

Revenue is recognized on net gaming revenue (NGR), total wagers minus winnings paid out, not gross handle. Handle figures can look astronomical ($16 billion in a single month in the U.S.) but the actual revenue retained is a fraction of that. The hold percentage is everything in this business.

What Comes Next

Several dynamics are worth watching for anyone tracking this industry as an investment or business story. First, the 2026 FIFA World Cup, hosted in the U.S., Canada, and Mexico, is expected to be the single largest sports betting event ever staged on North American soil. The timing aligns with a now-mature U.S. legal market and a format expanded to 48 teams, producing more matches and more betting opportunities than any prior edition. Operators are already building acquisition funnels around it.

Second, in-play or live betting is where the growth is concentrated. Live betting represented 62.35% of online betting market share in 2025, fueled by low-latency streaming and micro-betting products that let users wager on individual pitches, possessions, and points. The product roadmap for every major operator is centered on expanding in-play options and reducing the time between action and available bet.

Third, prediction markets are emerging as a parallel ecosystem that blurs the line between betting and financial speculation. Platforms like Kalshi and Polymarket allow users to trade on event outcomes in structures that more closely resemble futures contracts than traditional sports bets. The regulatory status varies dramatically by country, where the UK treats most prediction markets as gambling, Germany largely prohibits them, and the U.S. classifies them as financial products regulated by the CFTC. This is still an unsettled frontier, but it’s growing fast and attracting regulatory attention worldwide.

The macroeconomic backdrop matters too. Sports betting is often characterized as recession-resistant: consumer spending on gambling historically holds up better than discretionary retail but the competitive intensity in the U.S. market means margins remain under pressure even as handle grows. Flutter and DraftKings both guided to strong growth for 2025, but neither is operating with wide margins yet.

The Bottom Line

Sports betting has gone from a niche Vegas activity to an $88 billion global industry in a remarkably short time. In the U.S., the 2018 Supreme Court ruling unlocked a market that two companies, FanDuel and DraftKings, whomoved quickly to dominate, and which 22% of American adults now participate in at least annually.

This week is a useful snapshot of why the calendar matters in this business. The convergence of March Madness and The Masters isn’t an accident: it is a window that major operators spend months preparing for, because it represents a rare moment when casual fans who never open a betting app are suddenly paying close attention and primed to engage. The sportsbooks know it. The numbers know it. And if you had money on Michigan last night or have Scheffler circled at Augusta this week, so do you.

Responsible gambling resources: If you or someone you know has a gambling problem, call the National Problem Gambling Helpline at 1-800-522-4700.