Key takeaways
- With basic strategy and typical rules, blackjack's house edge is around 0.5%.
- Always look for blackjack paying 3:2; 6:5 tables cost you far more.
- Insurance is a poor bet for most players.
- Live blackjack has the same rules and maths as digital, at a slower pace.
How blackjack works
You and the dealer each get cards. Number cards count at face value, picture cards count 10 and an ace counts 1 or 11. You aim to finish closer to 21 than the dealer without going over. An ace and a ten-value card dealt as your first two cards is a blackjack, which usually pays 3 to 2. Other winning hands pay 1 to 1.
After your first two cards you can hit (take a card), stand, double down (double your stake for exactly one more card) or split a pair into two hands. The dealer then plays by fixed rules, usually drawing to 16 and standing on 17.
Basic strategy: the core decisions
Basic strategy is the mathematically best play for every combination of your hand and the dealer's up card. You don't need to memorise it to benefit: most of its value comes from a handful of rules.
| Your hand | Dealer shows | Best play |
|---|---|---|
| Hard 17 or more | Any | Stand |
| Hard 13 to 16 | 2 to 6 | Stand |
| Hard 13 to 16 | 7 to ace | Hit |
| Hard 12 | 4 to 6 | Stand |
| Hard 11 | Most up cards | Double down |
| Hard 10 | 2 to 9 | Double down |
| Pair of aces or eights | Any | Split |
| Pair of tens or fives | Any | Never split |
| Soft 18 (ace and 7) | 9, 10 or ace | Hit |
Exact plays vary slightly with the number of decks and whether the dealer hits soft 17, so check a strategy chart for your table's rules. Insurance, offered when the dealer shows an ace, is a side bet that loses money over time unless you're counting cards, which online shuffling makes impractical.
Table rules that change the house edge
| Rule | Good for you | Bad for you |
|---|---|---|
| Blackjack payout | 3 to 2 | 6 to 5 (adds well over 1% to the edge) |
| Dealer on soft 17 | Stands | Hits |
| Doubling | On any two cards, and after splitting | Only on 10 or 11 |
| Number of decks | Fewer | More |
| Surrender | Offered | Not offered |
Approximate edges with basic strategy. Exact figures depend on the full rule set.
Online and live blackjack
Digital blackjack
A random number generator deals from a freshly shuffled shoe each hand. It's quick and usually has lower minimum stakes. Because the deck is shuffled every round, card counting doesn't work.
Live blackjack
A real dealer deals real cards in a studio. Tables often seat seven players, and some formats let unlimited players share the same hand, each making their own decisions. The maths is the same as digital blackjack with the same rules. See our live casino guide.
Side bets
Many tables offer side bets such as Perfect Pairs or 21+3. They pay well when they land but carry much higher house edges than the main game. Treat them as an occasional extra, not a strategy.
Where to play blackjack online
| Casino | What you can play | Welcome offer |
|---|---|---|
 Ladbrokes | Slots, table games and live casino | Bet £10, get up to 500 free spins |
 Coral Casino | Slots, table games, live roulette and live blackjack | Bet £10, get 100 free spins |
 PlayOJO | Slots, table games, live casino, bingo and Slingo | No-wagering free spins on your first deposit |
 Casumo | Slots, jackpots, table games and live casino | 50% match bonus up to £100 |
 10Bet Casino | Slots, table games and live casino, alongside a sportsbook | 100% bonus up to £25 |
Coral's app includes live blackjack, and every casino here offers table games. Welcome bonuses on ir4 are for slots, so pick a blackjack casino on its tables, payments and support. Compare payment methods and read our casino reviews.
Blackjack and UK rules
The online slot stake limits don't apply to blackjack. All other protections do: age and identity checks, deposit limits, reality checks, self-exclusion and the credit card ban.
How we chose these casinos
Every casino on this page holds a UK Gambling Commission licence, confirmed on the public register. We read each welcome offer against the casino's own terms, and we only state game, payment or withdrawal details that the casino publishes or that independent sources agree on. Our full method is on the how we rate page, and our sourcing rules are in the editorial policy.
Keep it a game
Table games feel slower than slots, but sessions still add up. Decide your budget before you sit down, never increase stakes to win back losses, and use the deposit limits and reality checks every UK casino must offer. The National Gambling Helpline is free, 24/7, on 0808 8020 133. More support is on our responsible gambling page.
Frequently asked questions
What is the house edge in blackjack?
Around 0.5% with basic strategy under typical good rules. Poor rules, such as 6:5 blackjack payouts, raise it considerably.
Can you count cards online?
Not in digital blackjack, which shuffles every hand. Live games usually reshuffle well before counting could help.
Should I take insurance?
For most players, no. Insurance is a side bet that loses money over time.
Is there a maximum stake for blackjack in the UK?
The online stake limits apply to slots only. Blackjack table limits are set by each casino.