European Blackjack
In European blackjack, the dealer typically only receives one card initially and draws the second only after all players have acted — meaning there's no hole card to check for a dealer blackjack early. This removes the option to see a dealer bust coming before you finish your own hand, and it typically restricts doubling to hands totalling 9, 10, or 11.
American Blackjack
The version most people picture: the dealer takes two cards upfront (one face down), checks for blackjack immediately if showing an Ace or 10, and doubling is usually allowed on any first two cards. This is the version our How to Play guide and Free Practice Table are based on.
Key Rule Variations to Check
| Rule | Common Versions | Why It Matters |
|---|---|---|
| Blackjack payout | 3:2 (standard) vs 6:5 | 6:5 tables significantly increase the house edge — generally worth avoiding |
| Dealer's soft 17 | Stands vs Hits | Dealer standing is better for the player; hitting adds a small edge to the house |
| Doubling | Any two cards vs 9–11 only | More doubling flexibility slightly favours the player |
| Double after split | Allowed vs not allowed | Allowing it slightly reduces the house edge |
| Number of decks | Single deck up to 8 decks | Fewer decks generally favour the player slightly |
| Surrender | Offered vs not offered | Availability gives players an extra escape option on bad hands |
| Re-splitting Aces | Allowed vs not allowed | More flexibility slightly favours the player |
For the maths behind each of these, see our Odds & House Edge page.
Common Side Bets
Side bets almost always carry a considerably higher house edge than the main blackjack game — they're a form of entertainment on top of the base game, not a way to improve your odds.
- Perfect Pairs
- Wins if your first two cards form a pair, with bigger payouts for suited or coloured pairs.
- 21+3
- Combines your first two cards with the dealer's upcard to form a three-card poker hand (flush, straight, three of a kind, etc.).
- Bust It
- Wins based on the dealer busting, with payouts scaled to how many cards it takes.
- Lucky Ladies
- Pays based on your first two cards totalling 20, with the highest payout for a matched pair of Queen of Hearts.
Popular Named Variants
- Spanish 21
- Played with all 10-value cards removed except face cards, but with player-friendly bonus payouts and rules to compensate.
- Blackjack Switch
- Played with two hands at once, with the option to swap the second card between them — with trade-offs like blackjack paying only 1:1 and a dealer 22 pushing rather than busting.
- Free Bet Blackjack
- Certain doubles and splits are staked by the casino rather than the player, balanced by a dealer 22 pushing instead of busting.
- Live Dealer Blackjack
- Online format streamed from a studio or casino floor with a real dealer, following standard rules but at the pace of live play.
Whatever variant you encounter, the fundamentals from our How to Play guide still apply — check the table's specific rules card before you sit down, as it usually lists payout ratios and dealer rules in the corner of the felt.