What Is a Betting Bankroll?
Your bankroll is the total amount of money you've set aside specifically for betting โ completely separate from your everyday finances. This is the most important step: never bet money you can't afford to lose, and never chase losses with money outside your bankroll.
Setting a clear bankroll figure forces discipline. Once you've defined it, every betting decision is expressed as a percentage of that total โ not as a random dollar amount based on how confident you feel.
Betting Units
Experienced bettors work in units rather than dollar amounts. A unit is typically 1โ2% of your total bankroll. If your bankroll is $1,000, one unit is $10โ$20.
Working in units allows you to:
- Compare results objectively (e.g. "+12 units this season")
- Scale your betting up or down as your bankroll grows or shrinks
- Avoid emotional stake increases when you're on a winning run
Recommended Unit Size: 1โ2% of your total bankroll per bet. At 1%, you would need to lose 100 bets in a row to go broke โ statistically near-impossible in a well-researched selection process. Higher units increase both the risk and reward.
Flat Staking โ The Simplest Method
Flat staking means betting the same amount (in units) on every selection regardless of confidence. This is the most recommended approach for beginners and the most defensible over the long term.
Example: You have a $500 bankroll. Your unit is $5 (1%). Every hockey bet you place is exactly $5 โ whether it's an NHL moneyline at -120 or a KHL puck line at +145. Confidence levels don't change the stake.
The key advantage of flat staking is protection against self-deception. Bettors who stake more when they feel more confident often discover their "confident" selections perform no better than their routine ones.
The Kelly Criterion
The Kelly Criterion is a mathematically optimal stake sizing formula for bettors who believe they have an edge. It calculates the stake as a fraction of your bankroll based on your estimated edge and the odds offered.
Formula: f = (bp - q) รท b
- b = decimal odds minus 1 (profit per unit staked)
- p = your estimated probability the bet wins
- q = 1 - p (probability it loses)
- f = fraction of bankroll to bet
Example: You estimate a team has a 55% chance of winning, and the bookmaker offers decimal odds of 2.10 (+110). Kelly says: f = (1.10 ร 0.55 โ 0.45) รท 1.10 = 0.196 โ bet 19.6% of your bankroll. That's extremely aggressive. Most bettors use half-Kelly (9.8%) or quarter-Kelly (4.9%) to reduce variance while still capitalising on the edge.
Kelly Warning: The Kelly Criterion only works if your probability estimates are accurate. Overestimating your edge with full-Kelly staking can lead to catastrophic bankroll drawdowns. Always use fractional Kelly (half or quarter) in practice.
Surviving Losing Runs
Even profitable bettors experience long losing runs. In hockey, where -110 is a common price, you need to hit roughly 53% of bets to break even. A 10-game losing run is statistically normal over a long season. The bankroll management approach you choose determines whether a cold streak is survivable or terminal.
Key rules during a losing run:
- Never increase stakes to "chase" โ this is the fastest route to a blown bankroll
- Stick to your unit size โ the math will eventually work in your favour if your selections have genuine edge
- Review your selection process, not just the results โ are you betting wisely or getting unlucky?
- Consider a brief pause to reassess rather than forcing action to "get even"
Record Keeping
Serious bettors track every single bet in a spreadsheet or dedicated app. Record: date, sport, league, match, bet type, odds, stake, outcome and profit/loss. After 100+ bets, patterns emerge. You may find you're profitable on NHL moneylines but losing on puck lines, or that your weekend bets outperform weekday bets.
Without records, you're flying blind. With records, you can optimise based on real data.
Bankroll Management & Responsible Gambling
Strict bankroll management is also the foundation of responsible gambling. When you define a maximum betting budget in advance, set deposit limits at your bookmaker and never exceed your unit size, you remove the emotional and impulsive decision-making that causes problem gambling.
If you find yourself breaking your own bankroll rules repeatedly, read our responsible gambling guide and consider using self-exclusion tools offered by bookmakers.