Split meaning: in blackjack, to split is to turn a starting pair into two separate hands by adding a second bet equal to the first. Each hand then gets a new second card and is played on its own. A $10 pair of 8s becomes two $10 hands, so you now have $20 riding on the round.
Splitting turns a pair into two hands, each carrying a bet equal to your original stake.
A $10 split puts $20 at risk: win both for +$20, split the results for $0, lose both for −$20.
Standard strategy always splits aces and 8s and never splits 10s or 5s.
Resplitting, split aces and doubling after a split vary by game, so read the rules screen.
Term
Split (splitting pairs)
Game
Blackjack and its variants
Extra stake
Equal to the original bet, per new hand
When allowed
First two cards of the same rank (or value, by rule)
Classic always-split pairs
Aces and 8s
Split meaning: what splitting a pair does
This entry sits in our casino glossary next to the other blackjack terms. When your first two cards share a rank, such as two 7s, the game lets you separate them. You match your original bet, the two cards become the first cards of two new hands, and the dealer gives each one a second card.
After that, each hand is independent. You can hit, stand and, where the rules allow, double down on each one. The dealer still plays one hand against both of yours, so one of your hands can win while the other loses.
How to split in blackjack, step by step
Place your bet and look at your first two cards.
If they form a pair, the split option becomes available; choose it.
The game takes a second bet equal to your first and separates the cards.
Each card receives a new second card, and you play the first hand to completion.
Play the second hand, then the dealer acts and both hands are settled separately.
Online, the button handles the extra stake; at a land-based table you place matching chips beside the first bet. If you are new to the game, our how to play blackjack guide covers the full round from bet to payout.
What a split costs and pays in dollars
Splitting a $10 pair: possible outcomes
Hand A
Hand B
Total staked
Net result
Win
Win
$20
+$20
Win
Push
$20
+$10
Win
Lose
$20
$0
Push
Lose
$20
−$10
Lose
Lose
$20
−$20
A two-card 21 on a split hand is normally paid as an ordinary win at 1:1, not as a blackjack at 3:2. If you also double one of the split hands, that hand carries $20 on its own, and the round’s total exposure rises to $30. Splitting is a decision to put more money down, so it only makes sense where the pair plays badly as a single hand.
Which pairs to split: the standard guidance
The logic is simple. Split when a pair is a poor total but each card is a decent start on its own. Keep the pair together when the combined total is already strong.
Splitting pairs in a typical multi-deck game
Pair
Usual play
Why
A-A
Always split
Soft 12 is weak; two hands each starting with an ace are far better
8-8
Always split
Hard 16 is the worst total; two hands starting on 8 do better
10-10
Never split
A 20 already wins most rounds
5-5
Never split; treat as hard 10
10 is a strong doubling total
2-2, 3-3, 6-6, 7-7, 9-9
Depends on dealer upcard
Split against weaker dealer cards, per the chart
4-4
Rarely split
Only against certain upcards when doubling after split is allowed
Exact cut-offs shift with deck count and rules, so use a chart built for your game. Our blackjack basic strategy guide has the full table, and the basic strategy entry explains how those charts are worked out.
Split rules that change between blackjack games
Resplitting: some games let you split again if a new pair appears, often up to three or four hands; others allow one split only.
Split aces: many tables give each split ace just one card, and some don’t allow resplitting aces.
Double after split: allowed in some versions and not in others; allowing it helps the player.
Same rank or same value: some games let you split any two ten-value cards, such as a jack and a king; others need an exact rank match.
Correct splits reduce how much you lose on average, but they don’t remove the house edge. GamesHub’s RTG game list (opens in a new tab) and SlotCatalog put Suit ’Em Up Blackjack at up to 99.51% RTP, an edge of 0.49%. Over $1,500 of total stakes, that works out to an expected cost of about $7.35 ($1,500 × 0.49%), and every split adds to the total you stake.
Splitting more often than the chart says won’t change that. If you find yourself splitting 10s to “chase” a bigger round, or raising stakes after losses, our guide to chasing losses is worth reading, and free, confidential help is available at 1-800-MY-RESET (1-800-697-3738).
RTG blackjack where you can split, with an offer via our links
These casinos run RTG software, and blackjack appears in their published or reported terms and game lists; check the lobby for which variants are live and how each handles splits. They are offshore casinos that no US state licenses or regulates, so there is no state regulator to take a complaint to and the casino sets the rules. Check your state’s gambling law first. Welcome offers are slot-focused: table games are often excluded or weighted far lower, so read the terms. We earn commission, and the order is commercial.
Silver Oak Casino: $2,500 Welcome Bonus + 50 Free Spins, via our link (new players, 21+ or 18+ where allowed, terms apply). Its own offer page lists a 30x playthrough and “no max withdrawal”, but its general terms and conditions (opens in a new tab) say 40x on slots, so the two conflict; deposits start at $30, and roulette, baccarat and Pontoon 21 sit on its excluded-games list. Silver Oak publishes an Anjouan license held by Primrose Media Limited, and Michigan’s regulator named it in an April 9, 2025 cease-and-desist release. See the Silver Oak review.
Planet 7 Casino: $2,750 Welcome Bonus + 45 Free Spins, via our link (new players, 21+ or 18+ where allowed, terms apply). Third-party reviews such as LCB’s Planet 7 listing (opens in a new tab) report 30x (bonus plus deposit) on slots, a $1,000 max cashout on its 200% code and a $30 card minimum; no license is shown on its own site, and reviewers disagree on whether it holds one. Michigan named Planet 7 on April 9, 2025. Read the Planet 7 review.
Royal Ace Casino: $2,500 Welcome Bonus + 35 Free Spins, via our link (new players, 21+ or 18+ where allowed, terms apply). LCB’s Royal Ace listing (opens in a new tab) reports 30x (bonus plus deposit) on slots, a max cashout of 10x the deposit and a $30 card minimum, while casino.guru lists 250% up to $2,500 plus 35 spins; both are third-party, so the terms at sign-up decide. No license is shown on its own site. See the Royal Ace review.
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Who runs it: Primrose Media Limited, licensed in Anjouan (its terms). Regulator notes: Named in a Michigan Gaming Control Board cease-and-desist release, April 9, 2025.
21+ (18+ where allowed). New players. Min deposit $30. Wagering 30x on the offer page; 40x in the terms. Max cashout: None stated. Withdrawal cap From $2,500 / week. Terms source: casino terms. Terms apply. Offer checked October 28, 2026.
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21+ (18+ where allowed). New players. Min deposit $30 (reported). Wagering 30x deposit + bonus (reported). Max cashout: $1,000 (reported). Withdrawal cap $2,500 / week (reported). Terms source: reported. Terms apply. Offer checked October 28, 2026.
Royal Ace Casino#6 on our listSlots and specialty games
Published terms (reported): Third-party reviews disagree on the package (200% up to $4,000, or 250% up to $2,500 + 35 spins); the casino site could not be checked directly. Eligible games: Slots and specialty games (reported).
Who runs it: License not shown; third parties report Costa Rica or none. Regulator notes: Third parties report it does not accept Ohio players.
21+ (18+ where allowed). New players. Min deposit $30 (reported). Wagering 30x deposit + bonus on slots (reported). Max cashout: 10x deposit (reported). Withdrawal cap $2,500 / week (reported). Terms source: reported. Terms apply. Offer checked October 28, 2026.
These casinos are offshore operators. They are not licensed or regulated by any US state, and state consumer protections do not apply. Check the law in your state before you play. Terms marked “reported” come from third-party reviews; the terms shown at sign-up apply.
21+ (18+ where allowed). Every casino game has a built-in house edge, so over time you should expect to lose what you stake. Set a budget before you play and stop when it’s gone: responsible gambling tools and free help. Gambling problem? Call or text 1-800-MY-RESET (1-800-697-3738).
Frequently asked questions
What does split mean in blackjack?
Splitting means separating a starting pair into two hands and placing a second bet equal to the first. Each card gets a new partner card, and you play the two hands one after the other against the same dealer hand. On a $10 bet, the split puts $20 in play. Our how to play blackjack guide shows where splitting fits in a round.
Should you always split aces and 8s?
Yes, standard strategy splits aces and 8s against every dealer upcard in typical games. A pair of aces is a weak soft 12 as one hand, and a pair of 8s is hard 16, the worst total in the game. Two hands starting with an ace or an 8 lose less on average. See blackjack basic strategy for the rest of the chart.
Why shouldn’t you split 10s?
You shouldn’t split 10s because 20 is already a very strong hand. Breaking it into two hands that each start on 10 swaps a likely win for two less certain hands and doubles your stake. Some players split 10s hoping for a bigger payout, but the chart says to stand. The basic strategy entry explains why.
Does 21 after a split count as blackjack?
No, a 21 made on a split hand is usually paid as a normal win at 1:1, not as a blackjack at 3:2. Blackjack only counts on an original two-card hand. That matters most with split aces: an ace plus a ten-value card looks like a natural but pays even money. Check the game rules, and see our blackjack entry for payout basics.
Can you double down after splitting?
It depends on the game: some blackjack versions allow doubling after a split and others don’t. When it’s allowed, it helps the player, because a split hand that draws a good total can take extra money. The doubled hand then carries twice the original bet. Read the help screen, and see the double down entry for how doubling works.
How many times can you split in online blackjack?
Most games allow at least one split, and many allow resplitting into three or four hands, but the limit varies by version. Split aces are often limited to one card each with no resplit. Third-party listings don’t publish these rules for each RTG game, so check the rules panel of the online blackjack version you open.
Is splitting allowed with bonus money?
Usually the game allows it, but bonus terms can make it a bad idea. Welcome offers are built for slots, and table games are often excluded or count at a much higher rollover. A split also adds to your stake, which can break a maximum-bet rule. Read game weighting and our best bonus for blackjack page first.
How much money do I need to split and double in blackjack?
Plan for up to four times your base bet on a single split round, and more if resplitting is allowed. With a $10 bet, splitting puts $20 on the table; doubling one split hand raises it to $30, and doubling both makes $40. If the game lets you resplit to four hands and you double all of them, exposure reaches $80 from one $10 starting bet. Rounds like that are rare, but your session budget should cover them. Our bankroll entry shows how to size bets against your total funds.
What is the Perfect Pairs side bet in Blackjack + Perfect Pairs?
It's an optional side bet in RTG's Blackjack + Perfect Pairs that pays if your first two cards form a pair, with the top prize of 25:1 for a perfect pair, according to GamesHub. A $5 side bet on a perfect pair would return $125 profit. The side bet is separate from your decision to split, which happens in the main game. GamesHub lists the game's RTP at 95.9% to 99.59%, without saying which figure applies to the side bet, so check the help screen before you add it. Our Blackjack + Perfect Pairs page has the listed rules.
Can you split a jack and a king in blackjack?
Only in games that allow splitting by value rather than by exact rank. Some blackjack versions let you split any two ten-value cards, such as a jack and a king, while others require a true pair like two kings. Even where it's allowed, standard strategy says not to split ten-value cards, because a 20 already wins most rounds. Breaking it up doubles your stake for two weaker hands. Check the rules panel of your game, and read our blackjack basic strategy guide for the reasoning.
Should you split 5s in blackjack?
No, standard strategy never splits a pair of 5s; it plays them as a hard 10 instead. Ten is one of the best totals to double on, while two hands each starting with a 5 tend to land on weak totals such as 15. In dollars, doubling a $10 hard 10 puts $20 on one strong hand, rather than spreading $20 across two poor ones. Whether doubling is allowed depends on the game's rules, so check the help screen first. Our double down entry covers when doubling makes sense.
Can you split after you've already hit in blackjack?
No, splitting is only offered on your first two cards, and only when they form a pair under the game's rules. Once you take a hit, the option disappears even if a later card matches one already in your hand. The one exception is resplitting: in games that allow it, a split hand that receives a matching second card can be split again. Online, the split button simply won't appear when it isn't available. Our how to play blackjack guide explains the order of decisions in each round.
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