A bankroll is simply the pool of money set aside exclusively for playing poker. It is not the cash in a wallet or the balance in a current account - it is a dedicated, ring-fenced fund that exists to absorb the natural swings of the game. The whole point of managing it is to make sure no single bad run can knock a player out of the games they are good at, because the only way an edge turns into profit is by playing enough hands for that edge to show.
The size of the bankroll is measured not in currency but in buy-ins: how many full entries to the chosen stake the fund can cover. Thinking in buy-ins rather than absolute sums keeps the focus on the right risk. A reserve that looks large in raw terms can be dangerously thin at high stakes, and a modest sum can be perfectly safe at the micros. The number of buy-ins required is the single most important figure in this whole subject, and it changes sharply with the format being played.
01How many buy-ins each format demands
Cash games and tournaments live at opposite ends of the variance spectrum, so they call for very different reserves. The figures below are widely cited starting points rather than fixed laws - a player should adjust them up for tougher games and down only with caution:
- Cash games. Roughly twenty to forty buy-ins for the chosen blind level. Cash play returns money in a relatively steady stream, so the swings, while real, are shallower than in tournaments.
- Single-table and small-field tournaments. Around fifty to one hundred buy-ins. The top-heavy payouts already introduce sharper swings than cash games.
- Large-field multi-table tournaments. One hundred buy-ins at an absolute minimum, and many grinders keep several hundred. Huge fields mean a winning player can go a very long time between meaningful cashes.
The pattern is consistent: the more a format concentrates its rewards into rare, large outcomes, the deeper the reserve has to be. This is why the same player might be perfectly bankrolled for cash games and badly underrolled for the tournaments they enter with the same money.
| Format | Aggressive | Standard | Conservative |
|---|---|---|---|
| Cash games | 20-30 buy-ins | 40-50 buy-ins | 60+ buy-ins |
| 9-man Sit & Go | 40-60 buy-ins | 75-100 buy-ins | 120+ buy-ins |
| Small-field MTT | 75-100 buy-ins | 120-150 buy-ins | 200+ buy-ins |
| Large-field MTT | 100-150 buy-ins | 200-300 buy-ins | 300+ buy-ins |
Treat the aggressive column as the floor for an experienced, well-studied winner in soft games, the standard column as the sensible default, and the conservative column as the right choice for anyone who relies on poker income or simply sleeps better with a deeper cushion.
What changes the bankroll you need most
Two players in the same format can safely run different buy-in counts, because several factors move the number:
- Field size - bigger fields go longer between cashes, so they demand a deeper reserve.
- ROI or win-rate edge - a larger, proven edge lets the buy-in count come down a little.
- Payout structure - top-heavy prize pools swing harder than flat ones.
- Game speed - turbos and hyper formats raise variance and the buy-ins needed.
- Risk tolerance - how much drawdown you can stomach without playing scared.
- Reliance on poker income - if the games pay your bills, build a deeper, more conservative roll.
A practical test: count how many full buy-ins of the stake you intend to play your current fund actually covers. If that number sits below the format's floor - forty for cash, one hundred for big tournaments - the stake is too high for the roll, regardless of how affordable a single buy-in feels.
02Moving up and moving down in stakes
Stake selection is where bankroll management is won or lost. Moving up should happen only when two things are true at once: the bankroll comfortably clears the buy-in requirement for the higher level, and the win rate at the current level has held up over a sample large enough to trust. Jumping up on the back of one hot week is how a healthy roll evaporates.
Moving down is the harder discipline and the more important one. When a downswing drags the bankroll below the threshold for the current stake, the correct response is to drop a level and rebuild, not to push harder in the hope of winning it back. Dropping down is not an admission of failure - it is the mechanism that keeps a temporary cold run from becoming a permanent exit. The players who survive in the long run are usually the ones most willing to step down without ego.
03Risk of ruin and why the buffer exists
Risk of ruin is the probability that a player loses their entire bankroll before their edge has a chance to play out. It rises sharply as the bankroll shrinks relative to the stake and as variance increases, which is exactly why bigger-variance formats demand more buy-ins. A genuine winner with too few buy-ins can still go broke through sheer bad luck, simply because the swings outran the cushion.
The buffer of buy-ins is what pushes risk of ruin down toward zero. It does not change a player's edge - it changes how likely that edge is to ever get expressed. Understanding why short-term results scatter so widely around a true win rate is the subject of poker variance, and it is the reason these buy-in counts look so conservative at first glance.
04The numbers a bankroll is built on
Bankroll requirements are not arbitrary - they fall out of how an edge and its swings are measured. The size of that edge in cash games is the cash game win rate, quoted in the unit explained under what bb/100 means, while the tournament equivalent is the percentage return covered in the guide to measuring MTT ROI. Each of those figures sits on top of the same foundation: a chain of sound, positive-value choices, which is the idea behind expected value in poker.
| Break-even ROI | 0% |
|---|---|
| Solid MTT grinder ROI | +12% |
| Healthy MTT bankroll | 100 buy-ins |
| Typical cash win-rate | 3 bb/100 |
| Current swing | Upswing ↑ |
| Variance | High |
The connection is direct. A bigger edge and a smaller swing mean a thinner reserve is safe; a smaller edge and a wider swing demand a deeper one. Reading those numbers correctly - and never confusing a hot streak for a higher win rate - is what keeps the buy-in counts above honest rather than optimistic.
05Separating the life roll from the poker roll
The final principle is the simplest to state and the easiest to break: poker money and life money must never be the same money. A bankroll only functions as a risk buffer when it is fully separated from rent, bills and savings. The moment a downswing starts threatening day-to-day finances, decisions get tighter, scared and worse - the exact opposite of what an edge needs.
Keeping the two pools apart also gives the roll a clean job to do: signalling which stakes are currently affordable. A separated bankroll that has grown says move up may be possible; one that has shrunk says move down. For a fuller picture of how all these figures connect - win rate, ROI and the swings that surround them - the calculators on the Pokeroi homepage turn the abstract guidelines here into numbers for a specific set of results.