Blackjack Pair Splitting: Complete Strategy Chart

how pair splitting works, which pairs basic strategy splits, how double after split and ace restrictions change the chart, and how one starting wager can expand into several independently settled hands.

On this page

1. Blackjack splitting at a glance
2. Reference rules used on this page
3. What splitting means
4. How to split at a physical blackjack table
5. How to split online
6. Which cards qualify as a pair?
7. Complete pair-splitting chart
8. Why split aces?
9. Why split 8s?
   1. H17 surrender exception
10. Why not split 5s?
11. Why not split 10s?
12. Conditional pairs
    1. 2-2 and 3-3
    2. 4-4
    3. 6-6
    4. 7-7
    5. 9-9
13. Double after split
14. How no DAS changes the chart
15. Resplitting pairs
16. Resplitting aces
17. One-card-only split aces
18. Can split aces be doubled?
19. Does ace plus ten after splitting count as blackjack?
20. American peek and splitting
21. European no-hole-card exposure
22. Split-hand bankroll exposure
    1. One split
    2. One split followed by two doubles
    3. Resplitting to four hands
23. Why correct splits can feel bad
24. Pairs before hard and soft totals
25. Card counting and pair deviations
26. Worked pair examples
27. Common splitting mistakes
    1. Splitting 10s for more action
    2. Refusing to split 8s because the dealer is strong
    3. Playing A-A as soft 12
    4. Splitting 5s
    5. Ignoring DAS
    6. Assuming split ace plus ten pays 3:2
    7. Using a standard chart in a full ENHC game
28. Five-step pair-splitting decision
29. Frequently asked questions
30. Technical and regulatory sources

For the full strategy matrix, use our blackjack basic strategy charts. For the added wager that often follows a successful split, see doubling down in blackjack.

Splitting in blackjack means separating two eligible starting cards into two hands and placing a second wager equal to the original wager. The dealer gives each new hand another card, and the hands are then played and settled independently.

Splitting is not automatically good because it creates two chances to win. It also creates two wagers that can lose. The decision is correct only when playing two separate hands has better expected value than keeping the original pair together.

The most important beginner pattern is:

• Split aces.
• Split 8s under ordinary standard-blackjack strategy.
• Do not split 5s.
• Do not split 10-value pairs under ordinary basic strategy.

Those patterns are useful, but the complete decision still depends on the dealer upcard and the table rules.

Blackjack splitting at a glance

Reference rules used on this page

The strategy examples below assume:

• Four to eight decks
• Dealer stands on soft 17, abbreviated S17
• Double on any first two cards
• Double after split allowed, abbreviated DAS
• Late surrender available
• American hole-card and peek procedure
• Up to four total hands after resplitting non-aces
• Split aces receive one card each and cannot be hit
• Resplitting aces is not assumed
• Blackjack pays 3:2

Pair decisions can change with deck count, H17, no DAS, resplitting rules, surrender and European no-hole-card exposure.

What splitting means

Suppose the player wagers $25 and receives 8-8.

1. Place another $25 beside the original wager.
2. The dealer separates the two 8s.
3. Each 8 becomes the first card of a new hand.
4. The dealer gives another card to the first hand.
5. The first hand is completed.
6. The second hand is then completed.
7. Each $25 wager is settled separately.

The amount initially at risk increases from $25 to $50. One hand can win while the other loses, and further splits or doubles can increase the exposure again.

How to split at a physical blackjack table

1. Place a second wager equal to the original wager beside the first stack.
2. Use the table’s required split signal, often two separated fingers.
3. Say “split” clearly when the action could be confused with doubling.
4. Do not move the cards or touch the wagers after the dealer accepts the action.

The dealer controls the cards and plays each resulting hand in the required order. Procedures differ in hand-dealt games, so follow the dealer’s instructions.

How to split online

RNG and live-dealer blackjack normally display a button labeled “Split” or “Split pair.” The option can be unavailable because:

• The account balance cannot fund the second wager
• The cards do not qualify as a pair
• The table requires matching ranks rather than equal values
• The maximum number of hands has been reached
• The game prohibits resplitting that pair
• The decision timer has expired

Which cards qualify as a pair?

Some games permit any two cards with the same blackjack value to be split. Under that rule, Q-K or J-10 can be split because both cards count as 10.

Other games require matching ranks, so Q-Q can be split but Q-K cannot.

Do not assume that every ten-value combination qualifies. Read the table rules or online help screen.

Complete pair-splitting chart

Under the reference S17 and DAS rules:

This chart is not universal. No-DAS, H17, one-deck, two-deck and no-hole-card games require their own chart.

Why split aces?

A-A totals soft 12 when played as one hand. Splitting creates two hands that each begin with an ace, giving both hands a strong chance to finish at 19, 20 or 21.

Even with one-card-only restrictions, splitting aces is normally better than hitting or treating A-A as an ordinary soft 12.

Why split 8s?

8-8 totals hard 16, one of blackjack’s weakest starting totals. Splitting replaces one hard 16 with two hands beginning at 8.

The split can still lose both wagers. It is correct because its long-run expected value is generally better than keeping the pair together under the reference rules.

H17 surrender exception

In common multi-deck H17 games with late surrender, 8-8 against a dealer ace can be surrendered rather than split. Under the S17 reference game on this page, split 8-8 against the ace.

Why not split 5s?

5-5 totals hard 10, an excellent doubling hand against many dealer upcards. Splitting turns one strong hard 10 into two weak hands beginning with 5.

• Double 5-5 against dealer 2 through 9.
• Hit against dealer 10 or ace.
• Do not split.

Why not split 10s?

Two ten-value cards total 20, one of the strongest possible non-blackjack hands. Under ordinary basic strategy, stand on 20.

Card counters can have rare, count-specific ten-splitting deviations. Those are advanced index plays, not a reason for a basic-strategy player to split tens.

Conditional pairs

2-2 and 3-3

With DAS, split against dealer 2 through 7. Hit against dealer 8 through ace.

4-4

With DAS, split against dealer 5 or 6. Hit against every other upcard. Without DAS, 4-4 is normally not split under common multi-deck strategy.

6-6

With DAS, split against dealer 2 through 6. Hit against dealer 7 through ace.

7-7

Split against dealer 2 through 7. Hit against dealer 8 through ace.

9-9

Split against dealer 2 through 6 and 8 through 9. Stand against dealer 7, 10 or ace.

Double after split

DAS allows the player to double a hand created by splitting.

Suppose the player splits 8-8 and one resulting hand receives a 3, creating hard 11:

• With DAS: double when the dealer upcard calls for it.
• Without DAS: use the fallback action, normally hit.

DAS improves the value of several pair splits, especially 2-2, 3-3, 4-4 and 6-6.

How no DAS changes the chart

Resplitting pairs

Resplitting occurs when a split hand receives another eligible matching card.

If the player splits 8-8 and the first 8 receives another 8, a further equal wager can create a third hand when resplitting is allowed.

Common limits include:

• One split only, for two total hands
• Resplit to three total hands
• Resplit to four total hands
• Different limits for aces and non-aces

Resplitting aces

Resplitting aces is a separate rule from ordinary resplitting. A game can allow non-ace pairs to be resplit while prohibiting another split of aces.

Allowing resplit aces is favorable because it prevents a newly dealt ace from trapping the player in another weak A-A hand.

One-card-only split aces

A common procedure is:

1. Split A-A.
2. Receive one card on the first ace.
3. Receive one card on the second ace.
4. No further hits are permitted.

The hand can therefore be locked at a weak total such as A-2 for 13. Splitting remains correct because two ace-start hands are still more valuable than keeping soft 12.

Can split aces be doubled?

Usually not under ordinary one-card-only split-ace rules. Some proprietary games permit hitting, doubling or resplitting split aces. Those favorable rules require a matching strategy chart.

Does ace plus ten after splitting count as blackjack?

Usually no. If a split ace receives a 10, jack, queen or king, the hand normally counts as ordinary 21 rather than a natural blackjack.

• It usually pays 1:1 rather than 3:2.
• It does not normally outrank a dealer natural blackjack.
• It is settled like another split hand.

American peek and splitting

In an American hole-card game, the dealer normally checks for blackjack before player actions when showing an ace or ten-value card.

If the dealer has blackjack, the round ends before the player can split and add more money.

European no-hole-card exposure

In a full European no-hole-card game, the player can split before the dealer receives the second card.

If the dealer later completes blackjack, the player may lose the original wager, added split wagers and any doubles placed on the split hands.

Some games protect qualifying added wagers under original-bets-only or related settlement rules. Use a chart that matches the exact no-hole-card procedure.

Split-hand bankroll exposure

One split

• Original wager: $25
• Split wager: $25
• Total initial exposure: $50

One split followed by two doubles

• Original wager: $25
• Split wager: $25
• Double first hand: $25
• Double second hand: $25
• Total exposure: $100

Resplitting to four hands

• Four $25 hand wagers: $100
• If all four hands can and should be doubled: up to $200 total exposure

The cards and rules must permit each action. This is an exposure example, not a claim that every split round reaches the maximum.

Why correct splits can feel bad

Splitting adds another wager and increases short-term variance. A correct split can still create two losing hands or force additional doubles.

Those outcomes do not prove that the split was wrong. Strategy is evaluated by expected value over repeated comparable situations, not one result.

Pairs before hard and soft totals

Use this decision order:

1. Check surrender when the rules offer it.
2. Check whether the first two cards form a pair.
3. Check soft totals.
4. Check hard totals.

8-8 is a pair before it is hard 16. A-A is a pair before it is soft 12. The pair chart may still direct the player to keep the cards together, as with 5-5 and 10-10.

Card counting and pair deviations

Basic strategy remains the starting point.

A trained counter can use exact indices to change selected pair decisions, most notably splitting 10s against weak dealer upcards at sufficiently high counts.

Those deviations require a defined counting system, true-count conversion where applicable and a rule-matched index. Do not split 10s merely because the count is “positive.”

Worked pair examples

Common splitting mistakes

Splitting 10s for more action

Keeping 20 is the ordinary basic-strategy play.

Refusing to split 8s because the dealer is strong

Under the reference S17 rules, split 8-8 against every dealer upcard.

Playing A-A as soft 12

Split the aces rather than using the soft-total row.

Splitting 5s

Play the pair as hard 10.

Ignoring DAS

DAS changes important decisions for 2s, 3s, 4s and 6s.

Assuming split ace plus ten pays 3:2

It normally counts as ordinary 21 and pays 1:1.

Using a standard chart in a full ENHC game

Added split and double wagers can be exposed to a later dealer blackjack.

Five-step pair-splitting decision

1. Confirm that the cards are the original two cards of the hand.
2. Confirm that the game treats them as an eligible pair.
3. Check surrender when applicable.
4. Read the pair row against the dealer upcard using a chart matched to DAS and the other rules.
5. Fund the added wager only when the chart calls for the split.

Frequently asked questions

What does splitting mean in blackjack?

Splitting separates two eligible starting cards into two hands. The player adds a second wager equal to the original wager, and each hand is then played and settled independently.

Which pairs should always be split?

Under ordinary standard-blackjack strategy, aces are split and 8s are split under the common S17 rules used on this page. H17 surrender rules can create an exception for 8-8 against a dealer ace.

Which pairs should never be split?

Do not split 5-5 or 10-value pairs under ordinary basic strategy. Play 5-5 as hard 10 and stand on a total of 20.

Can you split any two cards worth 10?

Many games allow equal-value ten cards such as queen-king to split, while others require matching ranks. The table rules determine eligibility, although basic strategy still normally stands on 20.

Can you double after splitting?

Only when double after split, or DAS, is allowed. DAS changes several pair decisions because it preserves profitable doubles on the resulting hands.

Can you resplit a pair?

Only when the table permits it. Many games allow non-ace pairs to be resplit to three or four total hands, while applying stricter limits to aces.

Can you hit split aces?

Many standard games allow only one card on each split ace and prohibit further hits. Some variants allow hitting, doubling or resplitting split aces.

Why do you split 8s?

Keeping 8-8 creates hard 16. Splitting produces two hands beginning with 8 and has better long-run expected value under the reference rules.

Does card counting change pair splitting?

It can. The best-known deviations involve splitting 10s at high count indices, but they require a defined counting system and exact rule-matched index.

Technical and regulatory sources

• GLI-19: blackjack split-rule disclosure requirements
• Nevada Gaming Control Board: approved blackjack rules of play
• Nevada Gaming Control Board: four-hand resplit and split-ace restrictions example
• Nevada Gaming Control Board: resplitting and one-card split-ace example
• Nevada Gaming Control Board: resplitting aces and variant split rules

Strategy note: the examples use four- to eight-deck S17, DAS, late-surrender and American-peek rules. Exact pair decisions can change with deck count, H17, no DAS, surrender, resplitting rules, split-ace restrictions and dealer hole-card procedure.