Not all bookmakers operate in the same way. Some focus on attracting professional bettors with competitive prices and low margins, while others target recreational customers with promotions, bonuses, and higher built-in margins.
Understanding the difference helps you decide where to place your bets and how to maximise long-term value.
Bookmakers generally fall somewhere on a spectrum between sharp and soft.
Sharp bookmakers operate with very low margins, accept bets from winning customers, and rely on high betting volume rather than restricting successful accounts.
Soft bookmakers focus primarily on recreational bettors. They usually offer bonuses and promotions but charge higher margins and often restrict or limit customers who consistently beat their prices.
Neither model is inherently better—they simply serve different business strategies.
These figures are approximate and vary by sport, competition, and market type, but they illustrate the general differences between bookmakers.
You do not need to rely on published estimates.
You can calculate a bookmaker's average margin yourself using a simple process.
Repeating this exercise every few months allows you to monitor whether a bookmaker has become more or less competitive over time.
Every bookmaker margin represents a cost that reduces your expected return.
If two bookmakers offer the same market but one operates with a lower margin, the lower-margin bookmaker will generally provide better prices.
Over hundreds or thousands of bets, even a difference of two or three percentage points can have a significant impact on long-term profitability.
Professional bettors often think of bookmaker margin as a tax that should be kept as low as possible.
If you believe you have a genuine betting edge, your goal should be to minimise the amount you lose to bookmaker margins.
A common approach is:
This approach helps maximise value while extending the lifespan of accounts with bookmakers that may eventually restrict successful bettors.
Some UK bookmakers offer a promotion known as Best Odds Guaranteed (BOG), primarily on horse racing.
With BOG, if you place a bet before the race starts and the official Starting Price (SP) is higher than the odds you accepted, your winnings are automatically calculated using the higher SP.
For example, if you back a horse at 4.00 and its Starting Price rises to 5.00, you are paid at 5.00 rather than 4.00.
This promotion effectively improves your expected return and partially offsets the bookmaker's margin.
When used correctly, BOG is one of the few bookmaker promotions that provides a genuine long-term advantage to bettors.
Bookmakers vary widely in both their margins and their treatment of successful bettors. Sharp bookmakers generally offer lower margins and accept winning customers, while soft bookmakers rely on higher margins and often restrict profitable accounts. Measuring bookmaker margins yourself, choosing lower-cost markets, and taking advantage of genuine promotions such as Best Odds Guaranteed can significantly improve your long-term betting performance.
