Buy-in Limit
A buy-in limit is the minimum amount you must bring into a one-on-one game.
The simple explanation
A buy-in limit is the minimum amount you must bring to a heads-up game. It is a rule set by the room or the game so that the stakes stay meaningful. If the limit is $100, you cannot sit down with less than that.
A closer look
Rules like this are most important in heads-up play, where a very short stack against a deep one makes the game uneven. The term appears in descriptions of one-on-one seven-card stud. Many games also have a maximum buy-in, which stops players from sitting down with huge stacks. In cash games both limits are shown on the table or the list.
A practical example
A heads-up table sets a minimum of $100. A player must buy in for at least that.
Full explanation
A buy-in limit is the minimum amount you must bring into a one-on-one game.
A buy-in limit is the minimum amount of money you must bring into a one-on-one game. It is applicable to seven-card stud poker.
The limit makes sure that the stakes are meaningful and prevents a player from sitting with a very short stack.
Buy-in limits differ between rooms and games. Some games also set a maximum.
If you are unsure, ask the floor before you sit down.
Alternative spelling: Buy In Limit, Buyin Limit