Smarkets operates a commission-based model for its tennis exchange, charging a commission on net profits made by users from their bets. The standard commission rate is typically set at 2%, although this rate may vary based on a user’s account activity or promotional offers. The commission is calculated on the net winnings from trades, meaning it applies only to the profit made after deducting any losses. This model incentivizes users to engage more actively since the commission only applies when they successfully make a profit on their bets.