Blackjack Strategy: Splitting and Doubling Down Explained

The goal of blackjack is to beat the dealer to 21 or the highest value hand that doesn’t surpass 21. Tighten up your blackjack strategy by understanding the game’s most risky, yet rewarding moves: the blackjack double down and blackjack split. With the right strategy, you can reduce the house edge and keep up.

Although entirely different from one another, each has the potential to boost the total payout for a particular hand. Read our useful guide to the blackjack split and double. We go over the truth about card counting, when to split in blackjack, and how to take advantage of the blackjack double.

Depending on who you ask, counting cards is either a smart blackjack strategy or straight-up cheating. Despite common misconceptions, there are no laws against card counting at either the federal, state, or local level in the US. It’s the casino that doesn’t want you to try getting an edge on the house.

You might think it’s easier online since there’s no one over your shoulder, but every online casino does its best to inconvenience card-counting blackjack players. From frequent shuffling to fewer hands per hour and harsh penalties for anyone suspected of card counting, don’t count on getting away with it.

Overall, online casinos will absolutely kill your card-counting blackjack strategy. We suggest you stick to effective, legitimate strategies, such as splitting or doubling down.

Splitting

Blackjack rules make this move available whenever you’re dealt a pair of cards with the same value. Splitting will take an additional bet, then separate your first two cards into two different hands to play against the dealer. For an additional bet, you can get two hands to beat the dealer.

Splitting will raise the stakes and make the game a little more interesting. Before choosing to split, it’s important to understand whether or not it’s even a good idea for the hand you have. Just because you can split, doesn’t always mean you should. It’s not obvious when to split in blackjack.

Playing two blackjack hands will give you two shots at besting the dealer, but what’s the use if you’re likely to blow it anyway? Here are some tips for splitting in blackjack:

After being dealt the first two cards, you’ll be given the option to double down. This means you’re doubling the size of the initial bet in exchange for just one last hit.

It can often turn out to be a risky call. That’s why it’s critical to understand whether or not doubling is a good idea for your current hand.

When you choose to double, all you get is one final shot at blackjack. Many suggest saving the blackjack double for hands with a value of 10 or 11.

Given the potentially high number of 10s that are available in the deck, these hands have the highest likelihood of scoring a 10 and reaching blackjack.

You have to be strategic with the blackjack double down. This move can help you get blackjack right away or go bust quickly. 

Here are some hands we think are worth doubling:

Double hard 10s 
Any hand with a value of 10 is good for doubling down. The deck has four 10s and up to twelve face cards that also carry 10; the likelihood of you scoring a 20 is high and worth doubling on.

Double hard 11s 
This is blackjack’s strongest hand. The reason you should double down on this hand is that there are more cards with a value of 10 than any other in the deck, meaning you’re likely to get blackjack.

Double Ace + 2-7 
When you have an ace and another card valued 2 through 7, the double down is a good play. Although you have to beware doubling when the dealer’s up-card shows a 2, 7, or greater.