Blackjack Basic Strategy Chart: The UK Cheat Sheet for Every Hand

Blackjack basic strategy: the UK cheat sheet for every hand

Basic strategy is the mathematically correct play for every hand you'll encounter at a blackjack table. Follow it consistently and the house edge drops to roughly 0.5%. Play on instinct alone and that edge can climb past 2%.

That gap matters more than it sounds. On 50 hands at £10 a go, the difference in expected cost between basic strategy and guesswork is several pounds a session. This guide gives you the full chart - hard totals, soft hands and pairs - along with the UK rule variations that shift a few plays, and the traps that hand the house extra margin it hasn't earned.

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What the chart covers and how to use it

The strategy divides into three hand types. Hard totals are any hands without an Ace, or those where the Ace can only count as 1. Soft hands contain an Ace counted as 11. Pairs are two cards of the same rank.

To use the chart: find your hand type, identify your total, check the dealer's upcard, and follow the action shown. That's all there is to it. Everything here is set up for the most common UK online format - 6 or 8 decks, dealer stands on soft 17 (S17), and doubling after splits allowed. Any rules that change things are flagged further down.

Hard totals

Hard totals make up the bulk of decisions at the table.

5 to 8. Always hit. Your total is too low to threaten anyone, and no single card can bust you.

9. Double if the dealer shows 3 to 6. Hit against everything else. A dealer with a low card is more likely to bust, making the double worth the risk.

10. Double if the dealer shows 2 to 9. Hit if the dealer shows a 10 or Ace.

11. Double if the dealer shows 2 to 10. Hit against an Ace. Starting at 11 means any ten-value card - and roughly 31% of a standard deck is worth 10 - takes you to 21. It's one of the strongest doubling spots in the game.

12. Stand if the dealer shows 4, 5 or 6. Hit against everything else, including dealer 2 and 3. Many players over-stand on 12; against a strong dealer upcard, the risk of hitting is worth taking.

13 to 16. Stand if the dealer shows 2 to 6. Hit if the dealer shows 7 or higher. When the dealer is weak, protect your hand by standing; when the dealer is strong, your stiff total needs help.

17 or higher. Always stand. The bust risk of hitting a hard 17 outweighs any possible gain.

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Soft hands

A soft hand contains an Ace counted as 11. If the next card would otherwise bust you, the Ace drops to 1 and absorbs it. That flexibility means soft hands are worth pushing harder on than the total might suggest.

Soft 13 (Ace-2) and soft 14 (Ace-3). Double against dealer 5 or 6. Hit otherwise.

Soft 15 (Ace-4) and soft 16 (Ace-5). Double against dealer 4, 5 or 6. Hit otherwise.

Soft 17 (Ace-6). Double against dealer 3 to 6. Hit against everything else. Don't stand here - soft 17 looks like 17, but standing is a mistake. The Ace gives you a free draw, and against a weak dealer, extra money in is the right call.

Soft 18 (Ace-7). The one that trips people up most. Double against dealer 2 to 6. Stand against dealer 7 or 8. Hit against dealer 9, 10 or Ace. Your 18 already has dealer 7 or 8 beaten, so stand; against 9, 10 or Ace you're behind and need to draw.

Soft 19 (Ace-8) and higher. Always stand.

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Pairs

A matching pair can be split into two independent hands. Whether to split comes down to the pair value and the dealer's upcard.

Aces. Always split. Two hands each starting from 11 is a position you don't turn down, regardless of what the dealer is showing.

Eights. Always split. A pair of 8s gives a total of 16, the worst possible hard total in the game. Splitting breaks it into two hands starting at 8 - a much more workable base.

Twos and threes. Split against dealer 2 to 7. Hit otherwise.

Fours. Hit as standard. Only worth splitting against dealer 5 or 6 if the table allows doubling after splits.

Fives. Never split. Treat them as a hard 10 and double against dealer 2 to 9, hit otherwise. Splitting turns one strong total into two weak starting points.

Sixes. Split against dealer 2 to 6. Hit against 7 or higher.

Sevens. Split against dealer 2 to 7. Hit against 8 or higher.

Nines. Split against dealer 2 to 6 and against 8 or 9. Stand against dealer 7, 10 or Ace. Against a 7, your 18 already beats the likely dealer outcome - no need to expose two hands.

Tens (and any face cards). Never split. Standing on 20 wins the vast majority of the time. Breaking it up into two separate tens against any dealer upcard throws away a near-certain win.

UK rules that shift the maths

Basic strategy isn't universal. A couple of UK-specific rules change some plays and affect which table to sit at.

The no-hole-card rule (ENHC). Most UK online blackjack, and virtually all live dealer games at UKGC-licensed operators, uses the European No Hole Card rule. The dealer takes a second card only after all players have completed their hands. The downside: if the dealer turns out to have blackjack, you lose any extra money placed via a double or split - not just your original bet. The practical effect is that doubling against a dealer 10 or Ace carries slightly more risk than the chart suggests, and a touch of caution there is sensible. What doesn't change is that all UK-licensed games must produce genuinely random outcomes, certified under UKGC RTS 7 - so the underlying probabilities the chart is built on are consistent across licensed platforms.

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3:2, not 6:5. Some tables pay 6:5 on a natural blackjack rather than the standard 3:2. On a £10 bet that's £12 back instead of £15 - and across a session, that shortfall adds roughly 1.4% to the house edge. That single rule change outweighs almost everything the chart gives back. One glance at the pay table before you sit down is worth it. The broader story of how online casino games are regulated in the UK covers the fairness framework behind game rules in more detail.

Dealer stands on soft 17 (S17). The chart above is calibrated for S17 tables, the standard at most UK online casinos. If you find a table where the dealer hits soft 17 (H17), the house edge rises by about 0.2% and a handful of soft-double plays change. Stick to S17 tables where you can.

Bets worth skipping

Insurance. When the dealer shows an Ace, most tables offer an insurance side bet paying 2:1 if the dealer has blackjack. The probability of the dealer holding a ten-value hole card is lower than the payout implies. Decline it, every time.

Even money. If you hold a natural blackjack and the dealer shows an Ace, some tables offer even money - a guaranteed 1:1 rather than waiting on the dealer. It's insurance by another name and carries the same negative expectation. Say no.

Side bets. Perfect Pairs, 21+3 and similar additions typically carry house edges running from 3% to 10%. Basic strategy can't help there; the main game is where the value lives.

Getting the strategy to stick

Running through a few hundred hands in free-play mode is the fastest way to internalise the chart. Most UK-licensed casinos offer no-money versions of their blackjack tables - worth finding before you play for real. Hard totals cover the majority of decisions you'll face, so learn those first. Soft hands and pairs will follow.

Once hard totals click, the pattern behind everything else starts to reveal itself: when the dealer is weak (showing 2 to 6), stand on stiff totals and double aggressively; when the dealer is strong (7 or higher), play defensively and hit. Soft hands and pairs are mostly variations on that same logic.

What basic strategy doesn't fix

The chart cuts the house edge to around 0.5%, but it doesn't remove it. Over enough hands the casino still wins. Individual sessions swing in both directions, and a good run doesn't mean the maths has shifted.

Card counting adjusts play based on the remaining composition of the shoe and can theoretically tip the edge toward the player. It's not illegal, but it simply doesn't work online. Most online blackjack games use continuous shufflers that reset the deck each hand. Live dealer tables use physical cards but shuffle aggressively. Our best online casinos guide covers which operators run live tables if that's the format you're after.

Frequently asked questions

What is blackjack basic strategy? It's the mathematically optimal decision for every combination of your hand and the dealer's upcard, derived from simulations across hundreds of millions of hands. Follow it consistently and the house edge drops to roughly 0.5%.

Can I use a cheat sheet while playing UK online blackjack? Yes. UK online casinos don't ban it, and there's nothing stopping you checking the chart on another screen. Learning it eventually means you won't need to.

What does the no-hole-card rule mean for strategy? Under the ENHC rule (standard at most UK online and live dealer tables), the dealer takes a second card only after all players have acted. If the dealer has blackjack, any extra money placed on a double or split is also lost, not just the original bet. In practice: be a touch more cautious when doubling against a dealer 10 or Ace.

Should I take insurance? No. The 2:1 payout doesn't reflect the true probability of the dealer holding a ten-value card. It's a losing bet over time, regardless of your hand.

Is a 6:5 blackjack table worth playing? No. The 6:5 payout for a natural blackjack adds about 1.4% to the house edge - more than twice the advantage you face on a well-played 3:2 game. Avoid 6:5 tables.

Does the chart change if the dealer hits soft 17? The chart above assumes S17 (dealer stands). If you're at an H17 table, the overall strategy is similar, but the house edge is about 0.2% higher and a few soft-double plays change. S17 is the better table to choose.

Safer gambling: blackjack has one of the lowest house edges in the casino, but it is still an edge. Set a deposit limit before each session and treat the chart as a way to play well - not a way to win.