Bankroll Management for Betting
What Is Bankroll Management?
Bankroll management is the practice of sizing your bets relative to your total betting funds (your bankroll) to minimise the risk of ruin while maximising long-term growth. Even punters with a genuine edge can go broke without proper bankroll management because short-term variance is unavoidable.
Your bankroll is money you have set aside specifically for betting, it should be completely separate from your living expenses, savings, and other financial obligations. If you cannot afford to lose your entire bankroll, it is too large.
Fixed Unit Sizing
The simplest and most widely recommended approach is fixed unit sizing. A "unit" is a fixed percentage of your bankroll that you stake on each bet. Most disciplined bettors use 1-3% of their bankroll per bet.
I use a 100-unit bankroll system. One unit equals 1% of my total betting bank. A confident bet gets 2 units. An edge-case speculative bet gets 0.5 units. I never go above 3 units on any single selection. Over three AFL seasons using this system, my biggest drawdown was 18 units, which is manageable.
Example: If your bankroll is $1,000 and your unit size is 2% ($20), every bet you place is $20 regardless of confidence level. If your bankroll grows to $1,200, your unit becomes $24. If it drops to $800, your unit becomes $16.
This approach ensures that a losing streak does not wipe out your bankroll. At 2% per bet, you would need to lose 50 consecutive bets to lose your entire bankroll, an almost impossible scenario with even basic selection skills.
The Kelly Criterion
The Kelly Criterion is a mathematical formula for optimal bet sizing when you have an estimate of your edge. The formula is: f = (bp - q) / b, where f is the fraction of bankroll to bet, b is the decimal odds minus 1, p is the probability of winning, and q is the probability of losing (1 - p).
Example: You estimate a selection has a 55% chance of winning at decimal odds of $2.00. Then f = (1 × 0.55 - 0.45) / 1 = 0.10, or 10% of your bankroll. In practice, most bettors use "fractional Kelly" (quarter or half Kelly) because overestimating your edge leads to catastrophic over-betting.
Use our Kelly Criterion calculator to compute optimal stake sizes for your estimated edge and odds.
Common Bankroll Mistakes
Betting too large a percentage: Staking 10-20% per bet is a recipe for ruin. Even with a genuine edge, a bad week at these stakes can halve your bankroll, making recovery difficult.
Chasing losses: Increasing bet sizes after losses to "get even" is the opposite of sound bankroll management. Losses are part of the process. Stick to your unit size regardless of recent results.
Emotional betting: Placing bets out of boredom, frustration, or excitement rather than analysis. Every bet should be the result of a deliberate decision, not an impulse.
Not tracking results: Without records of your bets, you cannot assess your actual performance. Keep a spreadsheet tracking every bet: date, event, selection, odds, stake, and result. Over 200+ bets, your actual edge (or lack thereof) becomes statistically clear.
Mixing bankrolls: Treating your betting bankroll and personal finances as one pool of money. These must be completely separate.
Record Keeping
Maintain a detailed log of every bet. Track your profit/loss by sport, market type, and bookmaker. After 200+ recorded bets, analyse your data to identify which sports and market types generate profit and which ones lose money. Stop betting on losing markets and focus your bankroll on where you have a demonstrable edge.
Responsible Gambling
Bankroll management is itself a responsible gambling tool. By limiting bet sizes to 1-3% of a dedicated bankroll, you structurally prevent catastrophic losses. Combine this with deposit limits on your betting accounts. If your bankroll reaches zero, do not reload, reassess whether betting is a suitable activity for you. For support, call 1800 858 858.
Recommended Betting Sites
Based on our testing, these bookmakers offer the best experience for this type of betting:
Remember to gamble responsibly. Set limits before you start and never bet more than you can afford to lose. Call 1800 858 858 for support.