Blackjack rules explained

The objective in blackjack rules

Blackjack is a contest between each player and the dealer. Other players at the table do not compete with you, and the dealer does not compete with them as a group; every hand is settled one to one against the dealer's hand. You win in one of three ways: your final total is higher than the dealer's without going over 21, the dealer goes over 21 when you have not, or your first two cards make 21 and the dealer's do not.

You lose if you go over 21, which is called a bust, or if the dealer finishes closer to 21. A tie is a push, and your stake is returned. The key asymmetry is that you act first: if you bust, you lose even if the dealer busts afterwards. That single rule is where the house gets most of its edge.

These rules apply whether you play in a casino, on an RNG game or at a live table. For how the game works specifically at UK websites, see our guide to online blackjack UK.

Blackjack card values and hand totals

Suits play no part in the main game, only in some side bets. A hand with an ace counted as 11 is a soft hand: ace and 6 is soft 17, because another card cannot make it bust. If drawing a card would push the total past 21, the ace drops to 1 and the hand becomes a hard hand. For example, ace, 6 and 9 is hard 16, not 26.

A two-card 21, an ace plus any 10-value card, is a blackjack or natural. It beats any other 21, including a three-card 21. If both you and the dealer have blackjack, the hand is a push.

How a round of blackjack runs, step by step

1. Place your stake in the betting area within the table's minimum and maximum. Side bets, if offered, go in their own spots.
2. The dealer deals two cards to each player, usually face up, and two to themselves: one face up (the upcard) and, at most tables, one face down (the hole card).
3. If the dealer's upcard is an ace, insurance may be offered. At hole-card tables the dealer then checks for blackjack.
4. Each player in turn chooses to hit, stand, double, split or surrender until they stand or bust.
5. The dealer reveals the hole card and draws according to the fixed table rule, usually drawing to 16 and standing on 17.
6. Hands are compared and settled. Winners are paid, losers lose their stakes and pushes are returned.

Online, the same order plays out on screen. RNG games show buttons for each option when it is your turn; live games give you a timer for each decision.

Player options: hit, stand, double, split and surrender

Hit and stand

Hitting takes one more card; you can keep hitting until you stand or bust. Standing ends your turn with your current total.

Double down

To double down, you add a second stake equal to the first and take exactly one more card. Most online tables allow it on any first two cards; some limit it to totals of 9, 10 or 11.

Split

If your first two cards have the same value, you can split them into two hands, adding a stake equal to the first. Each hand then draws separately. Split aces usually receive only one card each, and a 21 made after splitting counts as 21, not as a blackjack. Tables differ on whether you can re-split and whether you can double after splitting.

Surrender

Where offered, surrender lets you give up half your stake and end the hand immediately. Late surrender, the usual version, is only available after the dealer has checked for blackjack. Many online tables do not offer it.

Insurance and even money

When the dealer shows an ace, insurance is a side bet of up to half your stake that the dealer has blackjack. It pays 2 to 1. Even money is the same bet offered when you hold blackjack yourself. The blackjack basic strategy page explains why both are best declined.

Dealer rules: when the dealer must hit or stand

The dealer makes no decisions. The table rules fix every draw, which is why the result of each hand depends only on the cards and your own choices.

The table felt or the game's help screen will say "Dealer must stand on 17" or "Dealer must draw to 16 and stand on all 17s" for an S17 game. If it says the dealer hits soft 17, expect a slightly higher edge.

Blackjack payouts and settlement

Always check the blackjack payout before you sit down. The 6 to 5 version pays £3 less on every £10 blackjack and is one of the worst rule changes in the game. Our roulette vs blackjack comparison shows how much this alone can change which game is cheaper to play.

Worked examples of blackjack rules in action

Example 1: a soft hand becomes hard

You stake £10 and receive ace and 5 (soft 16). The dealer shows 10. You hit and draw a 9. Counting the ace as 11 would give 25, so it drops to 1 and you have hard 15. You hit again, draw a 4, and stand on 19. The dealer turns a 7 for 17 and stands. You win £10.

Example 2: splitting eights

You stake £10 and get 8 and 8 against a dealer 9. You split, adding £10. The first hand draws a 3 for 11 and, where doubling after splitting is allowed, you double it with another £10 and draw a 9 for 20. The second hand draws a 10 for 18. The dealer turns a 10 for 19. Your doubled hand wins £20 and your 18 loses £10, so you finish £10 ahead on £30 staked.

Example 3: dealer blackjack at a no-hole-card table

You stake £10 on 11 against a dealer ace and double to £20. After you draw, the dealer takes a second card: a king. At tables that apply the European rule strictly, you lose the full £20. At tables that return additional stakes, you lose only the original £10. The help screen states which applies.

House edge under standard blackjack rules

With six to eight decks, 3:2 blackjack, the dealer standing on soft 17 and doubling after splits, a player using correct strategy faces a house edge of about half a percent. Every rule above nudges that up or down, and side bets usually add far more. The edge is an average across enormous numbers of hands, so short sessions can swing widely either way.

Variants such as Infinite Blackjack and Lightning Blackjack change the rules to add features, and their help screens show their own return figures. For a rule-by-rule list of edges, the Wizard of Odds blackjack section (opens in a new tab) has calculators and tables.

Losses over time are the expected outcome at any blackjack table. Set a budget for each session and treat the money as the cost of the entertainment.

UK rules for blackjack at licensed casinos

The rules of the card game are set by each game, but Gambling Commission rules shape how blackjack is offered online in Great Britain.

The game design rules, credit card ban and deposit limit rules pages explain each one. The Commission's Remote Technical Standards (opens in a new tab) contain the underlying requirements.

Live blackjack table rules and etiquette online

• Bets must be placed before the betting timer ends; late bets are not accepted.
• If the decision timer runs out, the game applies a default action, usually stand. The help screen says which.
• Chat is moderated; abusive messages can lead to chat or account restrictions.
• On a seven-seat table, a seat is yours until you leave; bet behind lets others stake on your hand at some tables. See bet behind.
• If your connection drops mid-hand, the game settles it under its own rules. Our page what happens if I lose connection mid game explains.

Live dealers are trained croupiers in a studio, not actors; see are live dealers real.

Blackjack rules myths

A few myths come up again and again. The most persistent is that the dealer must be beaten in every hand to make the session worthwhile; in reality, pushes are frequent and perfectly normal. Another is that blackjack is "the game where you can beat the house". Card counting can tilt the edge in favourable land-based conditions, but online games reshuffle or cut shoes early, as the card counting online page explains. Betting systems such as the Martingale system do not change the rules or the edge, only the shape of your results.

Where to play blackjack under UK rules

Choose a table at a Gambling Commission-licensed casino and read its rules first. Our partners are all UKGC-licensed; table names and limits change often, so check the lobby and help screens, for instance via the Coral live casino page. Other table games are in the games hub.

The offers below are general welcome offers rather than blackjack deals; 18+ and full terms apply. Casumo offers a 50% bonus up to £100 on a first deposit of £20 or more, with 10x wagering of the bonus within 7 days and a £5 per-bet cap while it is active; check its game restrictions. PlayOJO gives 80 spins on Big Bass Bonanza, 10p each, on a minimum £10 first deposit, with winnings paid in cash (not in Northern Ireland). Coral gives 100 spins at 10p on chosen slots after you deposit and bet £10 on slots, with no wagering on the winnings.

18+. Gambling should be entertainment that costs money, not a way to make it. Set a deposit limit before you play: how to set deposit limits. Free, confidential help: National Gambling Helpline 0808 8020 133.