It's not uncommon for some people to win 60% to 80% of their sports bets. Billy Walters, a millionaire, made his fortune in this manner. Most people, however, do not win by such percentages, at least not frequently. Having stated that, every professional gambler's goal is to win more and lose less. The more skilled you are at predicting winners and losers, the better your chances of success. In general, yes, you can make a living wage betting on sports. It all depends on how much risk you are willing to take and how skilled you are at judging games. If you get paid out 75% of what you bet, then no, you cannot live off of it. However, if you get paid when you win and don't have to share any of your profits with anyone else (your bookmaker or someone else), then you will be able to save some money. The most important thing to remember about making a living wage betting on sports is that there is no such thing as luck in sports gambling. Every game has an expected outcome based on statistics, so if you know how to use them, they are not going to deceive you. What may surprise some people is that statistically speaking, over/under bets tend to come up even more often than line bets.