Matched Betting Glossary

The practice of placing bets on all possible outcomes of an event across different bookmakers or exchanges to guarantee a profit regardless of the result. Arbitrage opportunities arise when the combined odds across platforms are in the bettor's favour.

Example: Bookmaker A offers Team A to win at 2.20, while Bookmaker B offers Team B to win at 2.20. By backing both outcomes with calculated stakes, you guarantee a small profit no matter which team wins.

A bet placed at a bookmaker that a selection will win. This is the standard bet most people are familiar with and forms one half of a matched bet.

Example: Backing England to win at odds of 2.50 means you stake £10 to potentially receive £25 back (£15 profit plus your £10 stake returned).

The world's largest betting exchange, where customers bet against each other rather than against a bookmaker. Betfair allows users to both back and lay selections, making it the most commonly used exchange platform for matched betting in the UK.

Example: Instead of betting against a bookmaker, you use Betfair Exchange to lay a selection that you've backed elsewhere. Betfair charges a commission on winnings, typically starting at 2% for most markets.

The percentage fee charged by a betting exchange on your net winnings from a lay bet. Commission reduces the amount you receive when your lay bet wins and must be factored into all matched betting calculations to ensure accuracy.

Example: Betfair typically charges 2% commission. If you win £100 from a lay bet, you receive £98 after the 2% commission (£2) is deducted from your winnings.

A bet consisting of two equal parts: one bet on the selection to win, and one bet on the selection to place (finish in the top positions as defined by the bookmaker). Each-way matched betting can offer additional profit opportunities, particularly in horse racing.

Example: An each-way bet of £5 on a horse at 10/1 (11.00) costs £10 total. If the horse wins, you collect on both the win and place parts. If it places but doesn't win, you collect only on the place part at reduced odds.

A mathematical measure of the average value you can expect to gain or lose from a bet over time. Positive EV (+EV) means a bet is profitable in the long run, while negative EV (-EV) means it will lose money over time. Matched betting focuses on consistently finding +EV opportunities.

Example: If a free bet offer consistently returns £15 profit from a £20 free bet across thousands of attempts, the EV of that offer is +£15. Seeking +EV bets is the foundation of long-term profitable matched betting.

A free bet where the Stake is Not Returned. This is the most common type of free bet. When you win a SNR free bet, only the profit is returned — the value of the free bet token itself is not included in your winnings.

Example: Using a £20 SNR free bet on a selection at 5.00 (odds of 4), you win £80 in profit but do not get the £20 stake back. Your return is £80, not £100.

A free bet where the Stake is Returned. These are more valuable than SNR free bets because when your free bet wins, you receive both the profit and the original free bet stake amount back.

Example: Using a £20 SR free bet on a selection at 5.00, you receive £100 back in total — £80 profit plus the £20 stake — making SR free bets worth more to extract than SNR equivalents.

When a bookmaker restricts or limits your account due to consistently winning or displaying advantage-player behaviour. Gubbed accounts may receive reduced stake limits, be excluded from promotions, or be banned from placing bets altogether.

Example: After consistently profiting from promotions, a bookmaker restricts your maximum stake to £2 per bet and excludes you from all future offers. This is known as being gubbed, and mug betting is used as a strategy to delay this.

A bet placed on a betting exchange that a selection will NOT win. By laying a selection, you act as the bookmaker, taking on the role of paying out if the selection wins. Lay bets are used alongside back bets to cancel out risk in matched betting.

Example: Laying England to win at 2.52 on Betfair means if England wins, you pay out the winnings to other bettors. If England doesn't win, you keep their stake.

The amount of money you must have available in your betting exchange account to cover a lay bet if your selection wins. Liability is calculated based on the lay odds and the lay stake, and must be held as collateral by the exchange.

Example: If you lay a selection at 4.00 for a £10 stake, your liability is £10 x (4.00 - 1) = £30. You must have at least £30 in your exchange account to place this lay bet.

A genuine-looking bet placed at a bookmaker with no matched lay bet, designed to mimic the behaviour of a recreational bettor. Mug bets are used to disguise advantage-playing activity and help delay or prevent account restrictions (gubbing).

Example: After extracting several offers from a bookmaker, you place a small £5 bet on a Premier League match at random odds without laying it off. This mug bet makes your account look like that of a regular casual bettor rather than a matched bettor.

A software tool used in matched betting to quickly identify selections where the back odds at a bookmaker closely match the lay odds on a betting exchange. A smaller difference between back and lay odds results in a lower qualifying loss.

Example: Using MatchLabs' Odds Matcher, you find a football match where the bookmaker offers 3.00 and the exchange lay odds are 3.02 — a very tight spread that minimises your qualifying loss when completing the matched bet.

The initial real-money bet placed at a bookmaker to unlock a free bet or bonus offer. A qualifying bet is matched with a corresponding lay bet on an exchange to minimise losses before the free bet is awarded.

Example: A bookmaker offers 'Bet £10, Get £20 Free Bet'. Your £10 stake at the bookmaker is the qualifying bet. You lay this bet on the exchange to limit your loss to a small qualifying loss.

The small, predictable loss incurred when placing a qualifying bet and its corresponding lay bet. This loss occurs due to the difference between the back and lay odds (the spread) and any exchange commission. It is considered the cost of unlocking a free bet.

Example: You back a selection at 3.00 and lay it at 3.10 on the exchange. After calculating the stake difference and commission, you might incur a qualifying loss of around £0.50 — a small price to unlock a £10 free bet.