What Is 21 Plus 3 Blackjack Side Bet?

In blackjack, the 21 Plus 3 side bet is a wager that the player’s first two cards and the dealer’s up card will form a flush, straight, three-of-a-kind, or straight flush. The odds of this happening are about 1 in 221, so the house edge on this bet is about 4.

55%.

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This side bet is found at many online casinos and some live casinos. It pays 9 to 1 for a flush, 6 to 1 for a straight, 3 to 1 for a three-of-a-kind, and 2 to 1 for a straight flush. Aces can be high or low in the straight and straight flush, but not in the three-of-a-kind.

PRO TIP:21 Plus 3 is a blackjack side bet that pays out if your first two cards and the dealer’s up-card form a three-card poker hand. In this case, the player can win a bonus of up to 100:1.

So, for example, A-2-3 of one suit would pay 9 to 1, as would K-Q-J of one suit. But Q-K-A of one suit would not pay anything because it’s not a three-of-a-kind.

This is a fun side bet to make if you’re already playing blackjack and you like making additional wagers with good odds. Just remember that the house edge is still in favor of the casino even on this bet.