MLB Betting Market Size: Handle, Revenue, and the £132 Billion Sports Wagering Boom

Editorial Team «mlb Players Betting» junio 20, 2026 Tiempo de lectura: 18 min

The Numbers Behind the Boom: Why £132 Billion Matters for Baseball

I pulled up the UK Gambling Commission’s 2025 annual report expecting big numbers. I was not prepared for the number I actually saw: £132.00 billion. That is the total legal sports betting handle — the total amount wagered — across the UK in a single calendar year. An 11 percent increase over the previous year, another record in a streak of records that has continued unbroken since the Supreme Court struck down PASPA in 2018.

To put that in perspective, £132.00 billion is more than the annual GDP of Hungary. It is roughly three times what consumers spent on movie tickets, streaming subscriptions, and video games combined. And it represents only the legal, regulated market — the money that flows through licensed sportsbooks in the all major UK-licensed jurisdictions where sports betting is now permitted. The offshore and unregulated market, while shrinking as a percentage, still handles additional billions that never appear in the official statistics.

Baseball’s share of that market is substantial but seasonal, concentrated in a six-month window from April through October when the 162-game regular season and playoffs generate daily betting opportunities that no other sport matches in sheer volume. This article breaks down the numbers that define the sports betting boom — handle, gross gaming revenue, jurisdiction-by-jurisdiction leaders, tax collections, and baseball’s specific position within the broader market — because understanding the scale is essential to understanding everything else: the integrity risks, the regulatory battles, and the political pressures that are reshaping how the UK watches and wagers on MLB players betting props.

Handle vs. GGR: Understanding the Two Metrics That Define Market Size

Two numbers dominate every conversation about sports betting market size, and confusing them is one of the most common mistakes I see in media coverage. Handle and gross gaming revenue measure fundamentally different things, and the gap between them tells you everything about how the industry actually makes money.

Handle is the total amount wagered. When a bettor places £79 on the Yankees moneyline, that £79 is handle. If the bet wins and the bettor receives £150 back, the £150 payout is not subtracted from the handle figure. Handle measures volume — how much money flows through the market in total. The £132.00 billion figure for 2025 is handle. It is the number that sounds most impressive in headlines, and it is the number that tells you the least about profitability.

Handle also overstates the amount of unique money in the system because the same pounds get recycled. A bettor deposits £395, places a wager, wins £316, and bets that £316 on the next game. The handle from those two bets is £711, but the bettor only introduced £395 into the ecosystem. This churn effect means the £132.00 billion figure represents the gross flow of wagers, not the net amount of money bettors committed to sports betting. The actual pool of deposited pounds is much smaller — a distinction that is important for understanding the economics but rarely acknowledged in industry press releases.

Gross gaming revenue — GGR — is what the sportsbooks actually keep. It is calculated as total wagers received minus total payouts to bettors. If a sportsbook takes in £79 million in wagers and pays out £71.1 million in winnings, its GGR is £7.9 million. For 2025, sportsbooks reported GGR of £13.40 billion, a 22.8 percent increase over the prior year. That figure represents the industry’s true top-line income, and it is the number on which taxes are assessed.

The ratio between GGR and handle gives you the average win rate — the percentage of every wagered pound that the sportsbook retains. In 2025, that figure hit a record 9.7 percent across the industry. For context, a 9.7 percent win rate means that for every £79 wagered, the sportsbook keeps £7.66 on average. The previous year’s win rate was lower, and the year before that was lower still. The trend is unmistakable: sportsbooks are getting better at extracting margin from their customers, through sharper odds-setting, more sophisticated risk management, and the proliferation of high-margin products like same-game parlays and player props.

That climbing win rate is the number I watch most closely. Handle growth captures market expansion — more states, more customers, more products. Win rate growth captures something different: the industry’s increasing efficiency at converting volume into profit. Both trends are accelerating simultaneously, which means the total pool of money lost by bettors is growing faster than the total pool of money wagered. The boom is real for the industry. For the average bettor, the math is getting worse every year.

Market Leaders and the Revenue Race

Not all states are created equal in the sports betting economy, and the disparities are staggering. New York dominates the national market with approximately £20.5 billion in handle in 2025 — roughly 16 percent of the entire market’s wagering volume concentrated in a single state. That number reflects New York’s population density, its mobile-first licensing model, and its proximity to a sports-obsessed metropolitan area that generates massive betting volume around the Yankees, Mets, Knicks, Nets, Giants, Jets, and their various seasonal overlaps.

New York’s dominance comes at a cost to operators. The state imposes one of the highest tax rates in the market — 51 percent of GGR — which means more than half of every pound the sportsbooks keep goes directly to the treasury. That rate is a deliberate policy choice: the state prioritized tax revenue over operator profitability, betting (no pun intended) that the market was large enough to sustain healthy volume even at punishing tax rates. So far, the bet has paid off. Operators grumble, but none have left.

Ohio tells a different but equally instructive story. The state generated more than £8.1 billion in sports betting handle in 2025, with 98 percent of that volume coming from online platforms. Ohio’s sportsbook revenue exceeded £0.79 billion for the year, making it one of the top markets in the UK despite legalising sports betting only in January 2023. The speed of Ohio’s growth illustrates how quickly a large-population state can scale when it launches with a competitive licensing framework and mobile-first infrastructure.

Ohio is also the state where the political backlash has been most intense. The Clase and Ortiz pitch-fixing cases both involved players on Ohio-based teams, and Governor DeWine’s vocal criticism of sports betting’s impact on athlete safety helped catalyse the «Save Ohio Sports Act» introduced in April 2026. A state that generated over £7.9 billion in wagers is now debating whether to ban online betting entirely. That tension — enormous economic value versus mounting social and integrity concerns — is playing out in different forms across the UK, but nowhere more visibly than in Ohio.

Tax Revenue From Sports Betting: £2.93 Billion and Rising

Follow the tax money and you understand why legislators who might otherwise be skeptical of gambling expansion have become its defenders. states collected £2.93 billion in sports betting tax revenue in 2025, a 32.4 percent increase over 2024. That money funds schools, infrastructure, problem gambling treatment programs, and general budgets. Once a state has built that revenue into its fiscal projections, removing it becomes politically agonising.

The growth trajectory is almost vertical. Office for National Statistics data shows that tax receipts from sports betting rose 382 percent between the third quarter of 2021 and the second quarter of 2025 — from £150 million in a single quarter to £724 million. That is not incremental growth. That is a new revenue category appearing from nothing and scaling to nearly £3.16 billion annually in under four years.

Tax rates vary wildly across jurisdictions, creating a patchwork that reflects local politics more than economic logic. At the low end, Iowa and Nevada charge 6.75 percent of GGR. At the high end, New Hampshire, New York, and Rhode Island take 51 percent. The difference is enormous in practical terms. A sportsbook operating in Nevada keeps 93.25 pence of every GGR pound. The same sportsbook in New York keeps 49 pence. That spread influences where operators invest in marketing, which states get the deepest prop markets, and where bettors find the sharpest odds.

The cumulative figure since PASPA’s repeal underscores the scale of the transformation. More than £474 billion has been legally wagered on sports in the UK since 2018. That flow of money has created a self-reinforcing political dynamic: states that have legalized are reluctant to reverse course because of the revenue dependency, and states that have not legalized face increasing pressure from neighbors whose budgets benefit from the tax windfall. The market is not just growing. It is entrenching.

Baseball’s Slice of the Betting Pie: Seasonal Patterns and Prop Market Growth

Baseball occupies an unusual position in the sports betting market. It is not the biggest sport for wagering — the NFL and college football dominate the autumn months, and the NBA and college basketball generate enormous March volume. But MLB’s 162-game regular season, running from late March through September, creates a daily betting rhythm that no other sport replicates. On a Tuesday night in July, when no other major league is in season, there are 15 MLB games on the board. That consistency is the engine of baseball’s betting volume.

Precise MLB-specific handle data is difficult to isolate from the aggregate, because most jurisdictions report total sports betting figures without breaking them down by sport. Industry estimates suggest baseball accounts for roughly 10 to 15 percent of annual sports betting handle, which would place the 2025 figure somewhere between £13.4 billion and £19.8 billion. That range is approximate, but even its low end represents an enormous market — larger than the entire legal sports betting industry was just a few years after PASPA’s repeal.

The prop market growth within baseball has been disproportionate. Ninety percent of all sports wagers are now placed on mobile devices, and more than half are live bets placed during games. Mobile betting rewards sports with frequent, discrete, individually resolvable events — and baseball, with its pitch-by-pitch structure and its batter-versus-pitcher matchups, fits that profile better than any other team sport. Strikeout props, home run props, total bases, hits, and the NRFI market have all grown faster than traditional moneyline and total wagers, and their share of baseball’s overall betting mix increases with each season.

The All-Star break and trade deadline create additional wagering spikes within the season, as casual bettors re-engage with baseball during high-visibility moments. But the World Series remains the single largest MLB betting event, drawing money from bettors who do not follow the sport during the regular season — similar to the Super Bowl effect in football, though smaller in absolute scale. The 2025 Super Bowl generated a record £1.10 billion in legal wagers, a benchmark no baseball postseason has approached. Baseball’s strength is cumulative volume across six months, not a single massive event.

The seasonal pattern also creates a revenue concentration effect for sportsbooks. Baseball betting peaks in October during the playoffs and World Series, when casual bettors enter the market alongside the regulars. But the steady base of daily volume throughout the summer is what makes baseball a backbone sport for operators — less volatile than football, less dependent on marquee matchups, and rich in prop opportunities that drive the high-margin products sportsbooks increasingly depend on.

Prediction Markets and the £395 Million Tax Leakage Debate

A new front opened in the sports betting market in 2025 that few people outside the industry saw coming. Prediction market platforms — most notably Kalshi and Polymarket — began offering event contracts on sporting outcomes that functioned, for all practical purposes, like sports bets. The distinction was regulatory: these platforms operated under Commodity Futures Trading Commission oversight rather than state gambling licenses, which meant they were not subject to state sports betting taxes, not required to share data with league integrity monitors, and not bound by the same responsible gambling requirements as traditional sportsbooks.

The UK Gambling Commission estimated that prediction markets redirected more than £395 million in potential tax revenue away from regulated sports betting in the past year. Former New Jersey governor Chris Christie, serving as a strategic adviser to the AGA, put the industry’s position in characteristically blunt terms, arguing that these platforms are offering sports gambling in violation of the laws of all all jurisdictions regardless of what regulatory label they operate under.

The tax leakage is only one dimension of the problem. Prediction markets that offer contracts on sporting events without league data-sharing agreements create a parallel, unmonitored betting ecosystem. A manipulator who wants to profit from insider knowledge or fixed outcomes can place wagers through a prediction market platform without triggering any of the integrity alerts that the regulated sportsbook ecosystem is designed to generate. Whether this has actually happened is unknown. That it could happen — outside the reach of the monitoring infrastructure MLB has built — is the concern that keeps integrity professionals up at night.

The regulatory battle is likely to intensify. Traditional sportsbook operators and their state government allies want prediction markets subjected to the same tax rates, licensing requirements, and integrity obligations. Prediction market platforms argue they are fundamentally different products with distinct regulatory frameworks. The resolution will shape how much of the sports betting market remains within the monitored, taxed, integrity-checked perimeter — and how much leaks into a space where none of those protections apply.

Where the Market Goes From Here

Predicting market growth in an industry this young and this politically volatile is a mug’s game, but the structural drivers are clear enough to sketch the trajectory. Sports betting is legal in all major UK-licensed jurisdictions as of early 2026. Several additional jurisdictions have legislation pending or under consideration. Every new state that launches adds population, handle, and tax revenue to the national total, and none of the 39 existing jurisdictions has reversed legalization despite the political friction in places like Ohio.

The £132.00 billion handle figure for 2025 will almost certainly be exceeded in 2026. New state launches, deepening mobile penetration in existing markets, and the continued expansion of live betting and prop markets all point upward. The more interesting question is whether the growth rate can be sustained. The early years of post-PASPA expansion saw double-digit annual handle increases driven by new state launches — a supply-side phenomenon. As the map fills in and fewer new jurisdictions remain to legalize, growth will depend more on demand-side factors: increased per-capita wagering, new product categories, and the conversion of occasional bettors into regular ones.

The political risks are real but, in my assessment, unlikely to reverse the macro trend. The Save Ohio Sports Act, introduced in April 2026, is the most aggressive legislative pushback to date. It proposes banning online sports betting, prop bets, and parlays while capping wagers at £79 and limiting bettors to eight wagers per day. Even its sponsors, however, frame it as a restriction on specific bet types and delivery methods rather than a full prohibition on sports wagering. More probable than rollback is targeted regulation: tighter controls on advertising, restrictions on certain prop markets (as the post-Clase micro-bet caps demonstrate), mandatory funding for problem gambling treatment, and potential federal oversight through the kind of congressional inquiry the Senate Commerce Committee initiated in 2025.

The market is not going away. More than £474 billion has been legally wagered since 2018, and the economic and political infrastructure built around that volume — public budgets dependent on the tax revenue, operator investments running into the billions, media partnerships, stadium sponsorships — creates a gravitational pull that would require extraordinary political force to reverse. The question for baseball, and for every sport embedded in this ecosystem, is not whether the money keeps flowing. It is whether the rules governing how it flows can evolve fast enough to prevent the next scandal from being worse than the last.

Creado por la redacción de «mlb Players Betting».