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Bankroll management: how much to bet

How to set a betting budget, and keep each bet small enough that a losing run doesn't end it.

Beginner · 3 min read

The short answer

  • Bet only money you could lose entirely, kept separate from money you need.
  • Make each bet about 1–2% of that money, and recalculate as the total changes.
  • Losing weeks happen even when you're betting well — small bets keep you in the game.
  • If you size bets with the Kelly formula, use a quarter to a half of what it says, never the full amount.

Your betting money, and one bet's size

Your bankroll is money set aside only for betting — an amount you could lose entirely without touching rent, bills, or anyone who depends on you. Keep it separate from everyday money so you always know the real number.

Then fix a share of it per bet. One to two percent is the standard range. A bet you like more can be double a normal one, but capping every bet at a small slice is what stops a single result from sinking you.

Example

One percent of $2,000 is $20, so that's a normal bet; a bet you like more is $40. If the budget grows to $2,400, a normal bet becomes $24. Bettors call that share a unit, written as 1u.

Losing runs are normal

Even betting well — taking prices that are better than they should be — you will lose plenty of individual bets and can have losing weeks or whole months. Keeping each bet to a small percentage is what lets a small, real advantage show up over hundreds of bets instead of getting wiped out by one cold stretch.

How much to risk (the Kelly formula)

The Kelly criterion turns your estimated advantage and the odds into a single suggested bet size. It grows a bankroll fastest in theory, but it swings hard, and it assumes your estimate of your own chances is exactly right — which it never is.

Because overestimating your advantage makes Kelly recommend far too much, most careful bettors take a fraction of what it says: a quarter to a half. You give up a little growth for much smaller swings — or skip Kelly entirely and stay at a flat 1–2%, which needs no estimate at all.

Common mistakes

  • Betting bigger after losses to win it back — chasing is the fastest way to bust.
  • Putting a large share of the budget on one bet you feel sure about.

Common questions

  • How much should my betting budget be?

    Only what you could comfortably lose. A common baseline is about 100 times your normal bet, so no single bet is a meaningful share of the whole.

  • Same amount every bet, or a percentage?

    A percentage keeps sizing honest as the total moves and compounds better, but it takes discipline. Betting the same amount every time is simpler and perfectly fine.

  • What should I do during a losing streak?

    Don't chase. Recalculate 1–2% against the smaller total, check that your method still holds up, and keep betting that smaller size — or take a break.

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