Qualifying bet
lay stake = back stake × back odds ÷ (lay odds − commission)
20 × 2.00 ÷ (2.04 − 0.02) = $19.80
Gives the same small loss whichever side wins.
Guides · Matched betting
Matched betting uses a bookmaker's free bet or bonus and covers the other side with a lay bet at a betting exchange, so the result of the match no longer matters. You keep most of the free bet's value as cash, minus small losses on the qualifying bet.
This guide gives the lay stake formulas and works a $20 esports free bet through to about $13.50 profit, then covers what is harder in esports: thin exchange markets, offers that exclude esports and accounts that get limited.
Short answer
Most of the free bet. In our example a $20 qualifying bet loses $0.59, and the $20 free bet at back odds 4.00, laid at 4.20 with 2% commission, locks in $14.07 whatever the result: $13.48 in total, 67% of the free bet.
Formulas
lay stake = back stake × back odds ÷ (lay odds − commission)
20 × 2.00 ÷ (2.04 − 0.02) = $19.80
Gives the same small loss whichever side wins.
lay stake = free bet × (back odds − 1) ÷ (lay odds − commission)
20 × 3 ÷ (4.20 − 0.02) = $14.35
Higher back odds keep more of the free bet.
liability = lay stake × (lay odds − 1)
14.35 × 3.20 = $45.93
What you need in the exchange account to place the lay.
Worked example
Example odds and a 2% exchange commission.
Back Team A for $20 at 2.00 at the bookmaker, lay $19.80 at 2.04 at the exchange. If A wins: +$20 − $20.59 = −$0.59. If A loses: −$20 + $19.41 = −$0.59.
Place the $20 free bet on an underdog at 4.00 and lay $14.35 at 4.20. If it wins: +$60 − $45.93 = +$14.07. If it loses: $14.35 × 0.98 = +$14.07.
$14.07 − $0.59 = $13.48 profit. The free bet kept 70% of its face value; the qualifying bet cost 3% of its stake.
The offer must allow esports, the exchange must list the same market, and both must settle on the same rules for forfeits and remakes.
Example odds, not live prices.
Risks
What it means: on smaller esports matches you may not get your full lay matched, or only at a worse price.
What it means: a wider gap between back and lay odds keeps less of the free bet. Lay as soon as the back bet is placed.
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Using legal bookmakers and exchanges is legal where online betting is allowed. Bookmakers can restrict bonus use or close accounts under their terms. Tax treatment depends on your country.
No. Arbitrage uses price gaps between bookmakers. Matched betting uses promotions and an exchange lay.
Yes, through mistakes: a wrong lay stake, a lay that is not matched, odds that move, or a market settled differently at each site. The qualifying bet also costs a little.
It can. Accounts used only for offers can lose access to promotions or have stakes limited.
No. Some offers exclude esports or only count certain markets. Read the terms before the qualifying bet. See esports free bets.
The games with the most exchange money, usually big CS2, League of Legends and Dota 2 matches. Two-way match winner markets are the simplest.