Bust in Blackjack
A bust is a blackjack hand whose total goes over 21, and a player who busts loses the stake at once, before the dealer has finished drawing. The word applies to the dealer as well: when the dealer’s hand passes 21, every player hand still standing is paid at even money. Most of the strategy around the term comes from one asymmetry. Players act first, so a player who has already busted has lost even if the dealer goes over 21 a moment later.
How a Bust Is Counted at the Table
A hand busts on 22 or more, counting picture cards as ten and an ace as either one or eleven, whichever keeps the total at 21 or under. That flexible ace is why a soft hand such as ace-six cannot bust on the next card.
Take a hard 16 against a dealer’s ten. Any card from six upwards breaks the hand, and with sixteen-cards-in-fifty-two worth ten, more than half of all draws do. Standing does not escape the problem, though, because a 16 only wins if the dealer busts.
The double bust is where the house edge hides.
If the player and dealer each went over 21 equally often, the rounds where both bust would still go to the house, since the player’s hand was settled first. A player who copies the dealer’s rule of hitting to 17 therefore hands over a sizeable slice of hands without the dealer earning them. One glossary calculation puts it at roughly 0.28 times 0.28, close to 8% of rounds, using an assumed bust rate of 28%, and that is a model figure rather than a measured one.
Dealer Bust Odds and Common Mix-Ups
The dealer’s chance of busting depends mostly on the upcard. Published tables for six-deck games where the dealer stands on soft 17 put it at about 42% with a five or six showing, around 35% with a two, and about 17% with an ace. When the dealer hits soft 17 the six rises to roughly 44%, so any figure needs its deck count and house rule beside it.
These percentages describe a long run of hands, never the next one. A dealer who has busted four rounds in a row is no more or less likely to bust on the fifth, because the shoe does not remember outcomes.
Two other uses of the word cause confusion. In online casino slang, going bust means losing a whole session balance, which has nothing to do with card totals, and some tables also offer a separate side bet that pays on the dealer busting, with its own rules and payout table that vary by operator.
