Dutch Betting

Dutching involves backing several selections on the same event so that no matter which bet comes in, the player is guaranteed a profit. Dutching is often confused with arbitrage betting, but the two methods are very different in practice.

It involves searching for discrepancies in odds between different bookmakers which when combined mean that the bettor cannot lose.

Example
Consider the simplest possible dutching example: a tennis match with just two outcomes. Player 1 is being offered at 2.2 to win a match by Bookmaker A, while Player 2 is available at 1.9 at Bookmaker B. To work out if this offers a chance to dutch, we must work out the probability of each bet coming in.

1 / 2.2 x 100 + 1 /1.9 x 100 = 101.95%.

This means that if we bet £100 at 2.2 and £115.79 at 1.9, we are certain to receive a profit of £4.21.

The same method can be applied to other sports with a single outcome, while dutching can also be used to boost your odds on multi-outcome events.

Controversy
It is worth noting that bookmakers do not condone dutching. If you are discovered to be indulging in the method, you are likely to have accounts suspended or become subject to a stake restriction.