Kalshi's esports trading volume reached $1,730,000,000 over twelve months.

Background: Prediction Markets Move From Politics and Economics Into Esports

If 2026’s gambling buzzword were a zodiac sign, it would be the Prediction Market. The earlier signs in this cycle included NFTs, crypto, online poker, sweepstakes and social casino. Kalshi, Polymarket and a growing group of operators are competing for a slice of that market while state gambling regulators sue them, they sue state gambling regulators, and the United States regulatory system has allowed them broad room to operate.

Prediction market data is available via API. It is not the ironclad truth signal Donald Trump Jr. promotes, but it still gives useful signals about consumer behaviour. Esports Insider analysis of Kalshi market data on Dune shows the esports category has moved from a tiny test case into a measurable growth story. The numbers also show that interest in esports still exists despite doubters.

Development: From a $5.2 Million Opening Month to $1.73 Billion in Twelve Months

In no month prior to October 2025 did esports contracts trade more than $0.4 million on Kalshi. The platform’s first esports offering in autumn 2025 was a single “who will win League of Legends Worlds” market. League of Legends accounted for almost all of the $5.2 million traded in October 2025.

Single-match markets followed across Counter-Strike 2, League of Legends, Valorant and Dota 2, and volume climbed almost every month. Kalshi traded $44 million of esports in the fourth quarter of 2025, $173 million in the first quarter of 2026, $549 million in the second quarter and $967 million in the third quarter. In August 2026, monthly esports volume peaked at $391 million. In the twelve months to September, esports volume on the platform totalled $1.73 billion.

The growth followed a familiar pattern: volume spikes with the biggest events. That was visible in soccer during the FIFA World Cup, and esports appears to show a similar trend, with strong underlying growth complemented by event spikes. June included the IEM Cologne Major, a Counter-Strike event. August brought the Esports World Cup Counter-Strike Finals and Dota 2’s The International. The combination of two large events in August produced the peak, while North America’s interest in Counter-Strike also made June’s numbers impressive.

Scale: Esports Remains a Small Slice Inside a Combo-Dominated Platform

Esports is growing quickly from a minuscule base, so its place inside Kalshi’s broader business matters. In October 2025, esports was 0.1% of Kalshi’s sports volume, excluding combos. At its peak in August, esports accounted for 2.9% of Kalshi’s single-leg trading, a figure that fell to 1.6% in September.

Kalshi’s business is dominated by combos. Traders stack contract after contract into a multi-leg bet, chasing large returns from small stakes. Parlays accounted for 58% of all platform volume in September. For UK readers, the structure resembles a 12-leg both teams to score accumulator: exciting to enter, hard to win.

Volume traded on a prediction market is not directly comparable to the handle reported by sportsbooks. It counts contracts traded, so moving in and out of positions can raise the number without additional cash entering the market.

Latest Progress: Partnerships, Hiring, and the League of Legends Worlds Test

Prediction markets began as a niche for political and economic forecasting. Sports betting contracts quickly made them a mainstream way for people in the United States to trade the outcome of sports, and they are not bound by state-by-state gambling regulation. Esports, treated as a sport in its own right, is following the same path.

Polymarket has signed a partnership with tournament organiser BLAST, and it has been reported that Riot Games is weighing partnerships with Kalshi and Polymarket. Kalshi has also used social media to look for someone to lead its go-to-market strategy in esports.

For esports organisations, the more immediate value may be validation. Volume traded on an event is a reasonable barometer of attention, and Kalshi’s audience is largely based in the United States. The data can sit alongside viewership data for tournament organisers, publishers and sponsors, helping show that esports is more than an echo chamber of people yelling very loudly about the future. It may also simply help people yell louder.

The next major test is the League of Legends World Championships. The event is taking place in the United States, so trading volume should provide a good barometer of interest. The analysis notes that Polymarket (Global) has traditionally been the home of most League of Legends trading, and the numbers will be watched closely through the next month, with early data tracked on Substack.

Kalshi esports volume reached $1.73 billion in twelve months, but the market is still in an event-driven discovery phase: large tournaments create peaks, single-leg esports remains a small slice of the platform, and the League of Legends World Championships will show whether the category can turn periodic surges into a more stable mainstream presence.