Matched betting is the technique professionals use to extract guaranteed cash from sportsbook promotional offers. It is math, not gambling — and PromoGrind gives you every calculator you need to do it for free.
Read the full guide →Matched betting is a systematic method for converting sportsbook promotional offers — welcome bonuses, bonus bets, profit boosts, insurance bets — into guaranteed cash profit by hedging the qualifying bet at a second sportsbook. The two bets cancel each other out, leaving only the value of the promotion as profit. Done correctly, the outcome of the underlying game is irrelevant.
Sportsbooks offer promotions to acquire and retain customers. Those offers have real monetary value that can be extracted through hedging. This is entirely legal — you are accepting terms that the sportsbook has published and using a second licensed sportsbook to hedge. There is no deception involved, only math. The IRS treats winnings as taxable income, so keep records.
Step 1: Sign up at multiple licensed sportsbooks. The more books you have access to, the more offers you can claim. Start with the highest-value welcome offers: DraftKings, FanDuel, BetMGM, and Caesars are typically the most generous in the US.
Step 2: Claim the welcome offer and read the terms carefully. Note the bonus amount, any minimum odds requirements, and whether the bonus is "bonus bet" style (only the profit paid out) or "cash" style (stake returned).
Step 3: Use PromoGrind's bonus bet converter or profit boost calculator to determine the optimal bet size and hedge stake. The calculator tells you exactly how much to bet at each book to maximize guaranteed profit.
Step 4: Track everything in PromoGrind's ledger. Accurate records are essential for tax purposes and for measuring your true ROI.
Traditional matched betting in the UK relies on Betfair or another lay exchange. In the US, those exchanges are not available. PromoGrind uses a second sportsbook as the opposing side. Instead of laying on an exchange, you simply bet the other outcome at a different book at comparable odds. The math is identical — you just need accounts at multiple books instead of an exchange account.
US welcome offers alone are worth $1,500–$3,000 in extractable value when all major books are included. Monthly reload promos and weekly offers add ongoing income of $200–$800 per month for active users. The ceiling depends on how many books operate in your state and how aggressively you pursue ongoing promotions.