Ask most players about their roulette plan and they'll tell you about the system: which bets, which progression, when to step up. Almost nobody starts with the number that decides whether that plan survives the first bad streak — the bankroll.
What a bankroll is — and what it isn't
Your bankroll is the money you have set aside to play with, and are prepared to lose in full. Not your savings, not next month's rent, not "money I'll win back later". If losing it would hurt, it isn't a bankroll — it's a risk you shouldn't take.
It helps to think in two layers. Your total bankroll is everything you've set aside for roulette this month. Your session bankroll is the part you bring to one sitting. A session ends when you reach your goal or the session bankroll is gone — and you never top it up from the total in the middle of a session.
Every system has a price tag
A progression system raises your bets after losses. That means every system has a fixed cost: the sum of every level, played once. That's the money you need to survive a full losing run from level 1 to the last level.
Master Key, for example, has eight levels that add up to $630. Fibonacci Dozens climbs from $5 to $275 a spin over ten levels — $715 to play every level once. On every system page we show this number as All levels once, next to the bankroll the system was simulated with.
Bigger bankroll, higher win rate — and a bigger rare loss
A larger bankroll lets you survive longer losing streaks, so more sessions reach the goal. That's why the win rates on our cards look so high: risking $1,000 to win $50, Fibonacci Dozens reached the goal for 93.2% of our 10,000 simulated players.
The other side is just as real. The 6.8% who didn't reach it lost a large part of that $1,000 — and averaged over everyone, players still lost money: −$10.92 a session. A big bankroll doesn't remove the risk; it turns many small risks into one rare, large one.
Match the goal to the bankroll
The smaller your goal compared with your bankroll, the more often you'll reach it — and the more you have at stake each time you don't. Before you play, ask yourself one question: am I comfortable losing the whole session bankroll to try for this goal? If the answer is no, lower the stakes, pick a cheaper system, or don't play that session.
Four habits that protect a bankroll
Decide the number before you arrive. Write down the session bankroll and the goal. Decisions made at the table, after a loss, are the expensive ones.
Never chase. Adding money to win back a loss is the fastest way to lose more than you planned.
Bank your wins. When a session reaches the goal, that profit leaves the session. It isn't fuel for the next one.
Use our numbers before you sit down. Every system page shows the bankroll it needs, the win rate at three goals and the bust risk. Pick a system whose worst case you can live with.
Next: why the wheel you choose — European or American — quietly changes every one of those numbers.