Blackjack rewards players who make the right decision more often than the wrong one. Basic strategy is the mathematically optimal way to play every hand, and it can cut the house edge from around 2% down to roughly 0.5% on a standard six-deck game. That is a meaningful difference over hundreds of hands, and it costs nothing to learn. Discover further information on see offers.
This guide outlines the core rules, explains why the numbers work, and shows how a small set of decisions covers the vast majority of situations you will face at a UK table. Whether you play for £1 a hand or £25, the logic stays identical.
The Foundations: When to Hit, Stand, Double or Split
Basic strategy is built on dealer probabilities and the composition of your own hand. The dealer busts roughly 28% of the time on a standard game, so your decisions should assume the dealer is more likely to make a hand than to break. That is why you stand on stiff totals such as 12 to 16 against a weak dealer card like a 4, 5 or 6.
Against a dealer 2 through 6, the dealer is under pressure from the outset. Standing on 12 or higher in those spots converts the dealer’s disadvantage into your advantage. Against a 7 or higher, you must chase stronger totals because the dealer is more likely to finish with 17 to 21.
Doubling down is where value hides. You double on 11 against any dealer card except an ace, and on 10 against a 9 or lower. Soft hands, such as ace-6, are doubled against a dealer 3 through 6. Splitting pairs follows a similar logic: always split aces and eights, never split tens or fives.
- Always stand on hard 17 or higher.
- Hit hard 8 or lower.
- Double on 11 against a dealer 2 to 10.
- Split aces and eights every time.
- Never take insurance, which carries a house edge of roughly 5.9%.
These five rules alone cover a large share of the hands you will see, and they form the backbone of any strategy card.
Why the Numbers Matter and How to Use Them at the Table
The difference between a 2% and a 0.5% house edge is not cosmetic. On a game with a £10 average stake and 60 hands per hour, that gap is worth around £9 an hour in expected losses. Basic strategy also reduces variance, because it avoids the speculative plays that produce long losing streaks.
Memorise the chart in stages. Start with standing and hitting rules, then add doubling, then splitting. Most players find that a printed strategy card is permitted at UK tables, and using one is entirely within the rules. Practise with free-play versions of the game before staking real money.
Note that rule variations change the chart slightly. A game where the dealer stands on soft 17 has a lower edge than one where the dealer hits soft 17. Six-deck games are common in the UK, and the strategy differences between six and eight decks are minimal. Always check the table rules before you sit down.
| Your Hand | Dealer Card | Action |
|---|---|---|
| Hard 11 | 2 to 10 | Double |
| Hard 16 | 2 to 6 | Stand |
| Hard 12 | 4 to 6 | Stand |
| Soft 18 | 3 to 6 | Double |
| Pair of 8s | Any | Split |
Basic strategy will not guarantee a win on any single hand, and no system can. What it does guarantee is that you are not handing the house extra money through avoidable mistakes. Treat the chart as the price of admission to a fair game, and your bankroll will last noticeably longer.
