Blackjack Rules: How to Play Blackjack in the UK, with Basic Strategy

Most casino blackjack rules in Britain follow this order. The table is a half-moon with up to seven betting boxes, and the dealer stands on the straight side with a shoe of shuffled cards, usually six standard 52-card decks.

Everything in blackjack turns on the order of play. You must make every decision before the dealer completes their hand, and if you go over 21 you lose straight away, even if the dealer goes on to bust in the same round. That single rule is where the casino’s advantage comes from. Everything else in the game, from the payout on a blackjack to the option to double, gives some of that advantage back to the player.

How to bet on blackjack

Each table shows its minimum and maximum stake on a small sign. You buy chips at the table or at the cash desk, then place them in the box in front of your seat before the dealer says no more bets. Some casinos let other players “back” a seated player by betting behind their box, in which case the seated player makes the decisions for both stakes.

If you are learning how to play blackjack for the first time, the simplest approach is to pick one stake you are comfortable losing and keep it the same each hand. Changing the size of a bet does not change the odds of the next hand, and no betting pattern changes the house edge.

Because four ranks share the value ten, a ten-value card turns up far more often than any other value: 16 cards in every 52, or about 31%. That is why the dealer’s up-card matters so much, and why a total of 12 to 16 is called a stiff hand. A single ten-value card is enough to bust it.

Hard and soft hands

A hand that holds an Ace counted as 11 is a soft hand. Ace + 6 is soft 17: you cannot bust by taking one more card, because the Ace can drop back to 1. Any hand without an Ace, or where the Ace must count as 1, is a hard hand. Ace + 6 + 9 is hard 16, not 26.

Soft hands are the reason the game asks you to think about more than the total on the table. A soft 17 and a hard 17 look the same on paper, but the soft one can take another card safely and the hard one usually cannot.

Dealers read hand signals as well as words, and in many casinos the signal is what counts. Tap the table to hit, wave a flat hand over your cards to stand, and place a second stack of chips beside your bet to double or split. Saying the word as well avoids mistakes at a busy table.

Doubling down

Doubling is the move that makes blackjack a good game for the player. You put up a second stake, equal to the first, at the moment the odds favour you most: a total of 10 or 11 against a weak dealer card. You only get one more card, so you give up the chance to hit again. Many British tables limit doubling to two-card totals of 9, 10 and 11. Compared with tables that let you double on any two cards, that limit adds about 0.09 percentage points to the house edge.^{1 (source)}

Splitting pairs

Two cards of the same rank can be split into two hands, each with a stake equal to the original bet. Each hand then takes a second card and is played on its own. Split Aces receive one card each and cannot be hit again, and an Ace plus a ten after a split counts as 21, not as a blackjack. Doubling after a split is usually allowed; a table that bans it adds about 0.14 points to the house edge.^{1 (source)}

Insurance and even money

When the dealer’s card is an Ace, you may be offered insurance: a side bet of up to half your stake that pays 2:1 if the dealer makes blackjack. Four of the 13 ranks are worth ten, so over time the bet returns 2 × 4/13 against a loss of 9/13, a loss of 1/13, or about 7.7% of each insurance stake in a large shoe. Even money, offered when you hold a blackjack yourself, is the same bet in another form.

Fixed dealer rules mean the dealer cannot react to what the players hold. A dealer with 16 must draw even if every player at the table is standing on 13. A dealer with soft 17 must stand at a table where the sign says “dealer stands on all 17s”, even when another card would help. Some tables use the opposite rule, “dealer hits soft 17”, which lets the dealer improve weak hands and adds about 0.22 points to the house edge.^{1 (source)}

No hole card: the European deal

In Las Vegas the dealer takes a second card face down, the hole card, and checks it for blackjack before the players act. British and most European casinos deal no hole card: the dealer’s second card comes after every player has finished. If that card makes a dealer blackjack, the casino usually collects every stake on the table, including the extra chips you put up to double or split. That is why basic strategy at a no-hole-card table hits 11 against a dealer ten or Ace instead of doubling, and does not split 8s against those cards. The rule adds about 0.10 points to the house edge compared with the hole-card deal.^{1 (source)}

The 3:2 payout on a blackjack is worth more than it looks. A blackjack turns up about once in every 21 hands from a six-deck shoe (2 × 24/312 × 96/311 = 4.75%), and paying it at 3:2 instead of 1:1 hands back more than two points of house edge. That is why the 6:5 tables found in some casinos are a poor deal: cutting the payout from £15 to £12 per £10 adds about 1.39 points to the house edge,^{1 (source)} more than every other rule change on this page put together.

Effects are measured against an eight-deck game where the dealer stands on soft 17 and the player may double on any two cards.^{1 (source)} They add up only roughly, because rules interact, but they show which signs to look for when you compare a British table with one abroad. A British table that pays 3:2 and has the dealer standing on all 17s is a good game even without the extras; a table that pays 6:5 is not, whatever else it offers.

Online blackjack for players in Great Britain follows the same casino blackjack rules, with the details shown in each game’s help screen. Every online game offered in Great Britain must meet the Gambling Commission’s technical standards, including random shuffling and a visible set of rules.^{3 (source)} Live dealer games streamed from a studio usually follow the no-hole-card deal described above. You can compare the cost of two rule sets with the table sign decoder on our casino rules homepage.

The chart follows from the dealer’s position. A dealer showing 2 to 6 is likely to need two or more cards and bust, so you stand on stiff hands and let them take the risk. A dealer showing 7 to Ace is likely to finish on 17 or more, so a total of 16 or less will usually lose if you stand, and hitting loses less.

The full chart, including soft hands and every pair, is on our blackjack basic strategy page, together with the reasoning for each cell. Learning it takes an evening; playing it consistently is what keeps the house edge near half a percent.

What strategy cannot do

Basic strategy chooses the least expensive decision; it does not make the game profitable. Betting systems that raise stakes after a loss do not change the edge either, they only change how quickly a session swings. Card counting can shift the odds in a shoe game, but casinos are free to reshuffle, limit bets or refuse play; our basic strategy page explains how the two differ. At £10 a hand, the 0.55% edge works out at about £5.50 over 100 hands on average, and a longer session costs proportionally more.

How we worked out the dealer table

We worked these figures out exactly rather than by simulation: starting from each up-card, we followed every possible draw, weighting each card by how often it appears (four ten-value ranks in thirteen) and applying the rule that the dealer stands on any 17. The calculation treats the shoe as infinitely deep, which is very close to a six-deck shoe; the full method is on our how we calculate odds page. Each row adds up to 100%.

Two patterns stand out. First, 6 is the dealer’s worst card: they bust 42.3% of the time. Second, a 7 is a much stronger card than a 6, because a ten underneath makes 17 and the dealer stops. That jump between 6 and 7 is why the strategy chart changes column at exactly that point.

The house edge in blackjack

With basic strategy and the blackjack rules UK casinos commonly deal (six decks, no hole card, dealer stands on 17, double on 9 to 11), the house edge is about 0.5% to 0.6%.^{2 (source)} On a £10 stake that is about 5p to 6p per hand on average, far less than European roulette at 2.70%. The figure depends on the table rules above, and it assumes correct play: a player who guesses, or who takes insurance, pays several times as much. Our house edge guide compares blackjack with every other game.

Lay your cash on the table rather than handing it to the dealer; they will count it in view of the camera and pass you chips. Once the cards are out, do not touch your stake until the hand is settled. If you want to double or split, place the extra chips next to your original bet, not on top of it.

Advice from other players is common and well meant, but it is your hand and your decision. Phones at the table, tipping and drinks vary by casino; our casino etiquette guide covers the general norms, and the casino’s own house rules come first.

Prefer to play online? Our UK casino comparison lists the licensed UK sites. 18+