Sports Betting vs Prediction Markets: What's the Difference?

Sports betting and prediction markets look similar — both let you profit from event outcomes. But the mechanics, fees, and legal landscape are very different.

Core Difference

Sports BettingPrediction Markets
CounterpartyThe bookmakerOther traders
PricingFixed odds set by houseMarket-driven
Fees5-10% vig built into odds1-3% spread + gas
Cash outLimited, at bookmaker's priceSell shares anytime
RegulationState/country licensedVaries (Kalshi CFTC, Polymarket offshore)

How Sportsbooks Make Money

Bookmakers don't rely on being right — they rely on the vig (commission) built into both sides of a bet. A market priced at -110 / -110 means you must win 52.4% just to break even.

That's a huge edge against you. Most casual bettors lose over time purely to the vig, even before skill comes into play.

How Prediction Markets Change the Math

In prediction markets, prices come from traders. You buy "Yes" shares for a sports outcome at a market price and sell anytime. Typical spreads are 1-3% — much tighter than bookmaker vig.

Example: a team priced at 40% on a prediction market means a $0.40 buy, paying $1.00 if they win — the same as +150 odds, but without the bookmaker margin.

Legality

Which Is Better for You?

Risks

Frequently Asked Questions

Is prediction market trading the same as sports betting?

No. Sports betting is against a bookmaker. Prediction markets let you trade against other users with market-driven prices.

Are prediction markets legal for sports?

Depends on jurisdiction. Kalshi offers regulated sports contracts in the US. Polymarket operates globally.

Which has lower fees?

Prediction markets typically. Sportsbook vig is 5-10%; prediction market spreads are often 1-3%.

Explore prediction markets

Tighter spreads, trader-vs-trader pricing.

Polymarket  |  Kalshi  |  Pulse Platform