Blackjack remains one of the most popular games at both brick-and-mortar venues and online casinos.

New players are consistently being attracted to the game on blackjack sites due to the easy to learn rules and accessibility, while seasoned players are constantly looking to improve their skills.

And one skill that is less commonly mastered is the split. It is one of the the key strategic moves players can make, though it is often less used than the standard actions.

In short, the split is the ability to split a pair of cards of the same value into two separate hands. It can increase winning potential, though also involves certain risks.

We’ve created a blackjack split guide, including when to split in blackjack, the risks and advantages, how this move can enhance the player’s chances of winning, and relevant blackjack split rules.

What is splitting in blackjack?

In blackjack, splitting allows the player to split a pair of cards of the same value (for example, two 8s or two Aces) into two separate hands. After splitting, players place an additional bet equal to the original, and then they play both hands independently.

Splitting offers players a chance to potentially improve their prospects of beating the dealer, but it can also double their risk with the additional funds required to play an extra hand.

Blackjack split rules

There are a few basic rules of splitting when playing blackjack on UK online casinos, which we have broken down below.

For a start, players can only split cards of the same value (for example, two 6s or two Kings). After splitting their original hand, players must place an additional bet that is equal to their original bet.

Each hand is then played separately, and players can hit, stand, or double down on each hand, depending on the online casino’s rules. Some operators allow re-splitting, which means if you receive another pair after splitting, you can split again.

There are special rules for splitting aces in blackjack; after splitting aces, most online casinos will only allow you to draw one card per hand. Bear these rules in mind before opting whether or not to split your hand in online blackjack.

When to split in blackjack

There are some optimal situations for splitting pairs – these are based on basic blackjack strategy.

Always split aces: Splitting aces gives you the best chance to improve your hand, as each ace has the potential to form a strong hand (like blackjack).

Always split 8s: A hand of two 8s equals 16, which is a weak hand. Splitting allows you to potentially turn two weak hands into stronger ones.

Dealer upcard: Consider splitting 2s, 3s, 6s, and 7s when the dealer is showing a weak upcard (typically from 2 through to 6).

These scenarios provide the player with the best mathematical advantage according to the classic blackjack hand probability table.

When not to split in blackjack

Of course, there are also situations where the blackjack split is not recommended. We have detailed these below; these moves are generally poor decisions based on basic strategy, as they run the risk of either going bust or wasting a strong hand.

Never split 10s or face cards: A pair of 10s or face cards gives you a hand value of 20, which is almost always a winning hand, so splitting it weakens your position.

Don’t split 5s: A hand of 10 is a great starting point for hitting or doubling down, so splitting 5s can diminish your potential.

Dealer upcard: Avoid splitting when the dealer is showing a strong upcard (for example, 10, or Ace), especially if your pair is weak.

Blackjack splitting strategy

There are a few basic strategy principles that guide the decision on whether to split pairs, and what to split in blackjack.

The dealer’s upcard influences whether or not to split certain pairs. If the dealer shows a low card (2 to 6), it increases the likelihood that splitting weaker pairs (like 6s or 7s) is a good move.

Splitting Aces and 8s is almost always recommended, regardless of the dealer’s upcard.

Players should consider the house rules when deciding whether to split. For example, weigh up whether they allow re-splitting or doubling after a split.

There are some more advanced splitting strategies, but these are best looked at only after experimenting with splitting and having a greater understanding of this blackjack option.

Responsible gambling

Gambling is a form of entertainment, not a way to make money, so remember to never wager more than you can afford to lose.

Never chase your losses and always remain in control of your budget.

If you need to, you can make use of responsible gambling tools – these include deposit limits, loss limits, self-exclusion and time-outs, and they are usually found in dedicated tabs on new casino sites.

Casino online can be addictive, whether you’re playing on slot sites, poker sites, or bingo sites, so remember to stay vigilant and be mindful about the signs of gambling addiction.

Should you wish to seek help for gambling-related issues, there are several charities and healthcare providers who offer support and information:

Splitting in blackjack: Summary

The blackjack split is the ability to split a pair of cards of the same value into two separate hands. It is a powerful tool in blackjack that can turn weak hands into potentially winning ones.

Understanding when to split and when to avoid it is crucial to mastering the game, though it is also important to remember that there is no set formula for when to split in blackjack.

Bear in mind that there are some set blackjack split rules, though some casinos will have slightly different conditions.

Players should approach splitting with a clear strategy and remember that responsible gambling is essential to long-term enjoyment and success.

Blackjack split FAQs

What does it mean to split in blackjack?

The split in blackjack is the name given to the action of ‘splitting’ a pair of cards of the same value into two separate hands. After splitting, players place an additional bet equal to the original, and then they play both hands independently.

When should I split in blackjack?

You should use the blackjack split in certain situations, such as if you have Aces, if you have 8s, and potentially if you have either 2s, 3s, 6s, or 7s when the dealer is showing a weak upcard (typically from 2 through to 6).

Can a dealer split in blackjack?

The dealer cannot split in blackjack – in fact, the dealer can never double, split, or surrender. This is what makes splitting a potentially invaluable tool for the player, offering them a chance to potentially improve their hand.

Can I re-split after splitting pairs in blackjack?

Re-splitting is the term given to the action a player may use if they receive another pair after splitting – they can simply split again. Some online casinos allow re-splitting, though others don’t. It is an important thing to consider when deciding to split.

Does splitting in blackjack increase my chances of winning?

Splitting does improve your chances of beating the dealer, but remember that it does cost you extra as you have to bet the same amount once again. Splitting provides an opportunity for the player to take a little more control of the hand, but remember that nothing is guaranteed.

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