A method for extracting the value of a free bet without predicting a result: back at the bookmaker, lay at the exchange, keep the difference. Legal, arithmetic, and the reason British bookmakers withdraw promotions from thousands of accounts a year.
Every bet at a bookmaker can be cancelled out by laying the same selection at an exchange. Do that with your own money and you lose a little to the price difference and commission. Do it with a free bet, whose stake was never yours, and you keep most of the free bet’s value whatever the result. Matched betting is the systematic version: take every welcome offer and reload offer on the market, extract its value, move on.
Lay stake for a stake-not-returned free bet = free bet x (back odds - 1) / (lay odds - commission). The extracted value rises with the back odds and falls with the gap between back and lay prices; markets with deep liquidity and small gaps, Premier League football and big races, are used for that reason. Odds-matching tools list the closest pairs across every bookmaker and the exchange in real time.
Reload offers, acca insurance, price boosts, refund-if promotions and casino bonuses can all be converted by the same method, each with its own expected value; the community around matched betting publishes the calculations daily. Income in the United Kingdom is tax-free, like all gambling winnings; elsewhere the rules in our tax guide apply.
Where a licensed exchange with liquidity exists and bookmakers offer free bets: the United Kingdom above all, Ireland, to a lesser extent Australia, Italy and Spain. In most of the world there is no exchange to lay at, and the method does not exist.
Bookmakers recognise the pattern, bets at maximum free-bet value on selections that are simultaneously laid, within weeks, and withdraw promotions from the account: the gubbing described in our guide to limits. It is legal, it breaks no terms at most operators, and it ends the income at each operator in turn. Matched bettors treat it as a finite project: a few hundred to a few thousand extracted from the market’s promotions, then done.
Laying the wrong selection or the wrong market; forgetting that overtime or a retirement settles differently at the two venues; running out of exchange balance to cover the liability; and using a second account or a relative’s account when the first is gubbed, which converts a legal activity into fraud.
Yes; it uses the offers as written and breaks no law.
A few hundred to a few thousand in most markets, over months, before promotions are withdrawn.
No; the lay side is what removes the risk.