Betting Strategy

Bankroll management is the single most important skill in sports betting — and the most ignored. Before placing a single bet, decide how much money you are willing to dedicate exclusively to betting. This is your bankroll. It should be money you can afford to lose entirely without affecting your life.

From there, the rule is simple: bet a consistent percentage of your bankroll on every wager. Most professional bettors use 1–2% per bet. At 1%, a 10-bet losing streak costs you roughly 10% of your bankroll — painful, but survivable. At 10% per bet, the same streak is catastrophic.

Key rules

• Flat bet every game — the same unit size regardless of how confident you feel
• Never chase a loss by increasing your next bet to recover
• Never bet more than 5% of your bankroll on a single game, no matter how certain you are
• Reassess your unit size quarterly — if your bankroll grows, your unit grows proportionally

Line shopping means checking multiple sportsbooks before placing a bet and taking the best available number. It sounds obvious, but the majority of recreational bettors use a single book and accept whatever line is posted.

The difference between -110 and -105 on a spread bet might seem trivial. Over a full season of betting, it isn't. At -110, you need to win 52.4% of bets to break even. At -105, that threshold drops to 51.2%. That 1.2% gap is the difference between a losing year and a profitable one for a bettor operating near the margin.

Key rules

• Have accounts at a minimum of three sportsbooks — ideally five or more
• Always check the line at every book before placing, not just your default
• Prioritise half-point differences on key numbers (3, 7 in football; 7, 10 in basketball) over juice differences
• Use an odds aggregator to compare lines across books in real time

Value betting is the foundation of every profitable long-term betting strategy. A bet has value when the true probability of an outcome is higher than what the odds imply. You don't need to win every bet — you need to win often enough that your average return exceeds what you paid for the bet.

Consider a coin flip. A fair coin lands heads 50% of the time. If a sportsbook offers +110 on heads (implying 47.6%), you have a positive expected value bet — even though you'll lose half the time. The math works in your favour over a large sample.

In practice, finding value means forming your own probability estimate for an outcome before looking at the line. If you believe a team has a 55% chance of covering the spread, and the line implies 52.4%, you have found value. If the line implies 58%, you haven't — regardless of how strongly you feel about the team.

Key rules

• Form your own line before looking at the sportsbook's number — this prevents anchoring to the posted odds
• Only bet when your estimated probability exceeds the implied probability by a meaningful margin
• Track your estimated probabilities and compare them to outcomes — this is how you identify where your model is strong or weak
• Accept that a value bet can lose — judge your process by EV, not by individual results

The closing line — the odds posted at game time — represents the market's most informed consensus. It incorporates all publicly available information: injury reports, weather, sharp money, and public betting percentages. It is the most efficient price the market will ever offer on that game.

Closing line value (CLV) measures whether you got a better number than the closing line. If you bet a team at -3 and the line closes at -4.5, you beat the closing line by 1.5 points — a strong positive CLV. If the line closes at -1.5, you got a worse number than the market ultimately settled on.

Research consistently shows that bettors who beat the closing line over a large sample are profitable in the long run — even when their short-term win-loss record looks ordinary. CLV is a leading indicator of edge. Win-loss record, over a small sample, is mostly noise.

Key rules

• Record the odds you bet and the closing odds for every wager — calculate your CLV on every bet
• Bet early when you have a strong opinion — sharp money moves lines, and waiting costs you CLV
• If you consistently get worse numbers than the closing line, your timing or your process needs work
• Use CLV as a long-term performance metric alongside ROI — it tells you whether your edge is real or a short-term variance spike

The mistakes below aren't rare edge cases — they're the default behaviour of recreational bettors. Sportsbooks are profitable because the average bettor makes most of these errors consistently.