When do you Double Down in BlackJack?

A "blackjack double down" is a classic move in blackjack which, if used correctly, can really increase a player’s chance profit from one round.

What is Doubling Down in BlackJack?

When a player receives their first two cards in a round of blackjack, they can choose to double their bet and receive an additional card. This is obviously only used if the player has a chance of getting blackjack with that additional card. In doing so, a player is choosing a blackjack double down.

Oftentimes, this move is made incorrectly and at the wrong time. A player should only choose this move if they have a good chance of beating the dealer. Otherwise, they are just sacrificing even more money.

Doubling down on 9

If a player decides to blackjack double down on a 9, it is important that the dealer is showing only a 2, 3, 4, 5, or 6.

Doubling down on 10 or 11

For example, there are 16 cards in a deck with a value of 10. If a player receives their first two cards from the dealer, and these two cards equal the sum of 10 or 11, it is statistically smart for them to choose a blackjack double down - or in other words, to call a “double.”

Doubling down on soft 13-17

Another example would be when the dealer shows a card that is likely to make him bust, while the player has an Ace with either a 2, 3, 4, 5, or 6. In this scenario, there are more cards within the deck of cards which would help the player beat the dealer. If the dealer is in a non-advantageous position, it means the player has a high chance of winning that round.

Common blackjack double down mistakes

Because doubling down in blackjack can be exciting and add an extra element of suspense to the game, it often used too fast and without the right opportunities presenting themselves. A player will often jump the gun on calling a double when the dealer is not showing a 10 and the player has two cards equalling only 9. Experts claim that although this could win sometimes, this strategy will only cost the player in the long run. 

Another common mistake is when players pass up an opportunity of a blackjack double down in a situation where they have received two 5’s and the dealer is showing a 5 or a 6. Many players see their two 5’s and decide to split. In splitting, they are asking for two more cards and choosing to play two separate hands. It is most advantageous in this scenario to double instead - as if the two 5’s were a 10.