A bookmaker condition requiring you to bet a certain multiple of a bonus before withdrawing it — designed to prevent immediate withdrawal of free credits.
A roll-over (wagering requirement) is a condition attached to a bonus or free bet: you must wager the bonus amount a specified number of times before withdrawing. A £100 bonus with a 5× roll-over requires £500 in qualifying bets before withdrawal. Qualifying bets are typically defined as bets at odds above a minimum (e.g. 1.80) and may exclude certain bet types.
Roll-over requirements dramatically reduce the effective value of a bonus. If you must bet £500 into a market with a 5% bookmaker edge to clear a £100 bonus, your expected loss from the roll-over is £25 — reducing the bonus value to £75. Matched bettors use exchanges to clear roll-overs at near-zero cost, extracting far more of the bonus value.
Free Bet
A promotional credit offered by bookmakers that lets you place a bet without risking your own money — typically with specific wagering requirements.
Matched Betting
A technique that uses back and lay bets to extract guaranteed profit from bookmaker free bet and sign-up promotions.
Arbitrage (Arb)
Simultaneously backing all outcomes of an event across different bookmakers at odds that guarantee a profit regardless of the result.
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