Blackjack rules may even vary at different tables in a casino. Some casinos only allow players to double after splitting certain cards. The more changes to the original rules of blackjack usually mean that the house edge is increasing. When the blackjack rules allow players to double after splitting the casino loses a bit of their advantage. Firstly, splitting in blackjack can only occur after you’ve been dealt a pair of the same value cards on your initial hand. For instance, two 8s, two 10s, two Jack’s etc. When that happens you will immediately get to split, if you want, because it’s always optional.
How Splitting in Blackjack Works?
The same strategy for pairs of threes and sevens also applies to two's. Split the two's versus a dealer two through seven, and hit the two's versus a dealer eight or better. The actions for doubling down and splitting are exactly the same, so always tell the dealer you are doubling down when you have a pair. If you are playing online blackjack, just click the button which says DOUBLE DOWN and your bet will be automatically placed. Double Down Blackjack Strategy. A pair of aces should always be split because the total of these two cards is 12, a very bad total for the blackjack player. The more important reason, however, is that when you split aces there is a better than average chance that you will receive a ten-valued card on one or both of them.
What splitting in blackjack means is that when your hand consists of two cards with similar value, you can split them by placing additional bet, creating two hands that will be played separately. The option to split is of enormous value; if it’s used wisely of course.
The basic idea behind splitting cards, besides the obvious goal of increasing your winnings, is twofold. First, to improve weak hands, splitting 8s are a clear example for that. Second, to increase possible winnings on stronger hands, for example splitting Aces.
As with every blackjack rule, things are very simple and yet complicated in the same time. Using this option when not needed, which is probably the most common mistake when it comes to splitting in blackjack, can cost you a lot of money. The good news is that the splitting strategy is rather straight forward and easy to remember, especially if you have a favorite blackjack game which you come back to. Otherwise, it varies according to the specific splitting rules which we will review below.
Last thing before we continue, many new players not sure or shy to request to split, double and so forth. Don’t be. You don’t need to know any secret signs or terminology. Just tell the dealer that you wish to split and place additional bet. That’s it. Of course if you play blackjack online things are much easier and all you have to do is press the split button.
Common Blackjack Split Rules
- Allowed to split twice (up to three hands).
- You can split non identical 10 value cards.
- Splits Aces cannot be re-split.
- Split Aces receive only one card.
- You can hit and double down split hands.
Let’s take basic basic Vegas Strip hole card blackjack rulesand see how different splitting rules influence the house edge. So additional rules we use: 8 decks, dealer checks for blackjack and stands on soft 17; double down on any 2 cards; blackjack pays 3:2. Under the splitting rules we used above the expected payout is 99.56% (or house edge of 0.44%).
Below you can see how each change influence the odds (+ means increases players’ odds, minus – lowers players’ odds):
- Only 1 split allowed: -0.045%
- Allowed to split to 4 hands: 0.01%
- No double after split: -0.14%
- Player can re-split Aces: 0.06%
- You can hit split Aces: 0.19%
When to Split in Blackjack – Basic Strategy
We will try to make it simple to remember. Here we won’t explain the mathematics behind each decision, but you can find it in additional articles.
Most crucial ones:
- Never Split 5s and 10 value cards. (Double on 5s as you would on any hard 10).
- Always split Aces and 8s.
The easy ones to remember:
- 2s, 3s, 7s – split when dealer shows 2-7
- 6s – split on dealer’s 2-6.
And the unique ones:
- 4s – are not a perfect hand for splitting, so you should split them only when the dealer shows 5 or 6 and only when you can double after split. If the casino doesn’t allow to double on split hands – never split 4s.
- 9s – split on dealer’s 2-6 and 8,9.
Best Casinos to Play
Splitting is an interesting component of playing Blackjack that allows you to enter two hands in the same round if the first two cards in your initial hand are of the same value. So what is splitting, when can you do it and when should you? Read on to find out.
What is splitting in Blackjack?
A player can split in a round of Blackjack if their opening two cards are of the same value. This means any pair from Ace through to nine and any two cards valued at ten (for instance, a ten and a Queen).
If a player decides to split, they must place a second bet for that round of the same value as their original bet, essentially doubling their stake. The two cards are then treated as the first card of two new independent hands that are played out separately. Should one of these hands become a pair, the player is allowed to split again and enter a third hand whilst tripling their stake, and so on.
Generally, you are allowed to hit or double down on a split hand, with the exception of if you have split two Aces, in which case the two hands are often not allowed to consist of more than two cards. In some cases, a Blackjack achieved on a split hand will not count as such, and simply be valued at 21.
In a game of Blackjack, opportunities to split will likely be rare. You have an approximate 0.5% chance of getting any pair from Aces to nines in your opening two cards, and a 9.4% probability of getting two cards valued at ten.
When to split in Blackjack
It is arguably universally agreed that there are two scenarios in which you should always split: if you have a pair of Aces or a pair of eights.
You must carefully consider if you are going to split in Blackjack.
While you are likely to be prohibited to getting only one more card on two split Aces, this nonetheless presents two separate opportunities to get Blackjack. There will be an approximate 30.4% chance of a hand starting on an Ace getting Blackjack, equating to a 51.6% probability that at least one of your two hands will do so.
Meanwhile, a pair of eights presents a value of 16. This is widely considered to be the weakest opening hand in Blackjack, by virtue of the fact it is one beneath the minimum value of 17 that the dealer is required to finish on (meaning it is always likely to lose) but has a significant risk of going bust when hitting. Splitting a pair of eights averts this problem.
For a pair of nines, you should split in all circumstances unless the dealer’s face up card is a seven, worth ten or an Ace, in which case you should stand. If the dealer’s face up card is a seven, the most likely outcome is that their second card will be worth ten, meaning they will be forced to finish the round with a hand worth 17, less than your hand’s value of 18.
When To Split Tens In Blackjack
If the face up card is worth ten or an Ace then they have a chance to get Blackjack, meaning standing on a value of 18 is the option that presents the best chance of winning.
With the exception of pairs of fives, for pairs between two and seven you should look to split when the dealer’s face up card is certain values between two and seven and they are at the greatest risk of going bust. The information discussed in the last few paragraphs is summarised in the table below:
Blackjack When To Split Cards
Blackjack splitting strategy
NB: This table assumes four to eight decks in play and that the dealer hits on a soft 17.
When not to split in Blackjack
When To Split In Blackjack
Under no circumstances should you split on a pair of tens. An opening hand worth 20 is very strong and can only be beat by a Blackjack or a three-card hand worth 21, and the dealer has just an approximate 12.2% chance of getting this in any given round. When splitting a pair of tens, you are likely to end up with two separate hands both worth less than 20, essentially spurning a strong opportunity to win the round by putting yourself at risk of doubling your losses.
You should also never split on a pair of fives. In this situation, the best approach is to double down, as this will provide an approximate 53.8% chance of finishing your turn with a strong hand containing a value of 18 or higher. The exception here is if the dealer’s face up card is worth ten or an Ace and they therefore have a chance to get Blackjack, at which point you should hit.
For pairs of twos, threes and sevens you should not split if the dealer’s face up card is at least an eight, and for pairs of fours and sixes you should not split if the dealer’s face up card is at least a seven. For pairs of fours, you should also never split if the dealer’s face up card is beneath five, at which point they have a plausible opportunity to build a high value hand via three cards.
Enhance your Blackjack strategy
If you’re looking for general advice on how to play Blackjack, read our guide to Blackjack. If you want to learn more on how to inform your Blackjack strategy, remember to read our articles on how to double down and surrender, alongside how to place a side bet and insurance bet.
We also have an article outlining an advanced Blackjack strategy. If you want to learn more about Blackjack beyond how to play the game, you can read about the history of Blackjack.
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