The UK Horse Racing Betting Market: Where £766 Million in GGY Comes From

The UK horse racing betting market generated £766.7 million in gross gambling yield from online betting alone in the year to March 2025, up from £733.5 million the previous year, according to the Gambling Commission’s annual industry statistics. That figure makes horse racing the second-largest online betting sport in Britain, behind football’s £1.3 billion but comfortably ahead of tennis, greyhounds and everything else. If you bet on horses in this country, you are participating in a market that processes hundreds of millions of pounds every quarter — and understanding how that market works, where the money flows and why the dynamics are shifting gives you a structural advantage over punters who treat it as a black box.

Turnover Trends: A 26% Real-Terms Decline

The GGY headline — rising year-on-year — tells one story. The turnover data tells a starkly different one. Total online betting turnover on British horse racing for the 2023-2024 financial year stood at £8.73 billion, down from £9.11 billion the year before and £10 billion in 2021-2022. That is a nominal drop of 16.3% over two years. Adjusted for inflation over the same period, the real-terms decline is closer to 26%.

HBLB Chief Executive Alan Delmonte acknowledged the paradox in the Board’s 2024/25 annual report: “Levy yield for the 12 months to 31 March 2025 reached almost £109m, the fourth successive year of increase and the highest since the Levy collection reforms of 2017.” Levy income is rising because it is calculated on bookmakers’ gross profit, not on turnover. Bookmakers are making more from less — extracting higher margins from a shrinking volume of bets. For the industry, that is a mixed blessing. For the individual punter, it means the average bet is returning less to the bettor than it did three years ago.

The causes are multiple but not mysterious. The Gambling Commission’s introduction of financial vulnerability checks — widely called affordability checks within the industry — has directly reduced betting activity among higher-staking customers. Some have stopped betting altogether; others have migrated to unlicensed operators. The BHA’s own data for 2024 showed total betting turnover on British racing falling by 6.8% year-on-year, with the decline slowing to under 1% in the second half of the year but average turnover per race still down by over 4%.

Levy Income vs Betting Volume: The Paradox

The Horserace Betting Levy Board collects a statutory levy on bookmakers’ gross profits from horse racing, which it distributes to fund prize money, regulation, integrity and veterinary science. In 2024/25, this levy reached a record £108.9 million — the highest since the collection mechanism was reformed in 2017. The HBLB committed £94.3 million to supporting racing during the year, including £67 million in prize money contributions and £19.4 million for raceday services.

The paradox is that levy income keeps rising while the underlying betting turnover keeps falling. This is mathematically possible because bookmakers’ margins have widened: they are keeping a larger share of each pound bet. The reasons include changes in product mix — a shift towards accumulator bets and bet-builder products, which carry higher margins than singles — and a reduction in the proportion of high-value, low-margin bets placed by the most knowledgeable punters, many of whom have been affected by the affordability checks regime.

The risk, as the HBLB itself has noted, is sustainability. If turnover continues to fall while margins hold, the levy income may plateau. If margins contract — through competition, regulatory changes or a shift in customer behaviour — the income could drop sharply with no turnover growth to offset it. The Board has responded by increasing its target reserves range to £25-35 million, an acknowledgement that the current income level is not guaranteed to persist.

Affordability Checks and Their Impact

The Gambling Commission introduced enhanced financial risk checks as part of a broader consumer protection agenda following the 2023 Gambling Act white paper. These checks require licensed operators to verify that customers can afford their level of gambling activity, using data from credit reference agencies and other financial indicators. The intention is to prevent gambling-related harm; the effect, according to the racing industry, has been a significant contraction in betting volume.

The BHA has argued that affordability checks have pushed some bettors towards unlicensed operators. A 2023 BHA survey found that 10% of racing bettors were already engaging with the black market. The International Federation of Horseracing Authorities reported a 522% increase in unique UK visitors to 22 unlicensed betting sites between August 2021 and September 2024 — a rate of growth that dwarfed the 49% increase at licensed platforms over the same period.

For the everyday punter, the practical effect of affordability checks is most visible at the higher end of the market. If you bet in modest stakes — ten or twenty pounds a race — you are unlikely to trigger a check. If you bet in hundreds or thousands, you may find your account restricted or your stakes limited. The checks apply to all licensed operators, which means the playing field is level among legal bookmakers but tilted against them relative to the unlicensed market.

The Gambling Commission has disputed the characterisation of its measures as the primary driver of turnover decline, noting that multiple factors — including changing consumer behaviour, competition from other forms of gambling and broader economic pressures — contribute to the trend. The Commission published data showing that approximately 95% of the financial vulnerability checks conducted through a pilot scheme were completed frictionlessly by credit reference agencies, without the customer being aware of the process. The industry’s counter-argument is that the remaining 5% disproportionately includes the highest-staking customers, whose reduced activity has an outsized impact on total turnover.

What This Means for the Everyday Punter

Three things matter if you bet on British racing in 2026. First, the market you are betting into is shrinking in real terms. Fewer pounds are being wagered, which means thinner liquidity at smaller meetings — particularly at all-weather venues like Southwell, where exchange pools and bookmaker market depth are already modest. Thinner markets create more price volatility and more opportunities for those who are quick to spot value, but they also mean that large bets can move prices against you more easily.

Second, bookmaker margins are wider than they were three years ago. The odds you are offered today return slightly less to the bettor, on average, than the odds offered in 2021. This makes discipline and price comparison more important than ever. Taking best odds guaranteed, shopping between bookmakers and using betting exchanges for lay bets or better place terms are not optional extras — they are defences against margin erosion.

Third, the industry’s economics are in transition. Prize money is being funded at record levels thanks to the levy windfall, but the underlying betting turnover that sustains the levy is declining. If that decline accelerates, prize money could contract, field sizes could shrink and the quality of the racing product — particularly at the lower grades that dominate venues like Southwell — could deteriorate. None of this is certain, but all of it is plausible, and a thoughtful bettor should be aware of the economic currents running beneath the surface of the sport they bet on.

The UK horse racing betting market is not broken. It is changing. The punters who understand the direction of that change — and adjust their approach accordingly — will navigate it better than those who assume everything works the way it did five years ago.