Blackjack Rules

The goal of blackjack is simple: beat the dealer by getting a hand total closer to 21 without going over. You are not competing against other players at the table — only against the dealer. If your hand exceeds 21, you bust and lose immediately, regardless of what the dealer holds.

Understanding these basic blackjack rules is the foundation for everything else — from blackjack strategy to card counting. Once you know the rules of blackjack inside and out, you can start making optimal decisions at every hand.

Unlike players, the dealer has no choices — blackjack dealer rules are fixed. The dealer must hit on any total of 16 or below and stand on 17 or above. The most important variation is the “soft 17” rule: some casinos require the dealer to hit soft 17 (an ace + 6), while others require the dealer to stand. The hit-soft-17 rule increases the house edge slightly.

The dealer always acts last, which is the casino's primary advantage. Players who bust lose immediately, even if the dealer would have busted too. This is why understanding casino blackjack rules and playing basic strategy is so important — it helps you avoid unnecessary busts.

When you are dealt a pair (two cards of the same value), you can split them into two separate hands by placing an additional bet equal to your original wager. Each card becomes the first card of a new hand, and you receive a second card for each.

Blackjack split rules vary by casino. Common variations include: how many times you can re-split (typically up to 3 or 4 total hands), whether you can double after splitting, and special rules for splitting aces. Most casinos only allow one additional card on split aces, and a 10-value card on a split ace does not count as a natural blackjack — it pays even money instead of 3:2.

Doubling down lets you double your original bet in exchange for receiving exactly one more card. Blackjack double down rules differ between casinos: some allow doubling on any two cards, while others restrict it to hard totals of 9, 10, or 11 only. Most tables also allow doubling after splitting.

Knowing when to double is one of the most profitable decisions in blackjack. The basic strategy chart shows the optimal double down plays for every hand and dealer upcard combination.

Surrender allows you to forfeit your hand and reclaim half your bet. Blackjack surrender rules come in two forms: early surrender (before the dealer checks for blackjack) and late surrender (after the dealer checks). Early surrender is extremely rare and very favorable to the player. Late surrender is more common and still reduces the house edge when used correctly.

Basic strategy recommends surrendering hard 16 against a dealer 9, 10, or ace, and hard 15 against a dealer 10. Not all tables offer surrender — check the table rules before sitting down. When available, it is one of the most underused and undervalued blackjack rules.

When the dealer's upcard is an ace, the table offers insurance — a side bet of up to half your original wager that pays 2:1 if the dealer has blackjack. Blackjack insurance rules are straightforward: you place the insurance bet before the dealer checks the hole card. If the dealer has 21, your insurance bet wins (but your main hand likely loses). If the dealer does not have blackjack, you lose the insurance bet and play continues normally.

Basic strategy recommends never taking insurance. The bet has a house edge of over 7%, making it one of the worst bets at the blackjack table. The only exception is for card counters who know the deck is rich in 10-value cards.

When you and the dealer end up with the same hand total, the result is a push (tie). Your original bet is returned — you neither win nor lose. However, a natural blackjack (21 on the first two cards) beats a dealer 21 made with three or more cards. If both you and the dealer have a natural blackjack, it is also a push.

The rules of blackjack are the same whether you play at a physical casino or online. Online blackjack games use a random number generator to simulate the shoe, so card counting is not effective. However, online play is ideal for learning the rules and practicing basic strategy at your own pace. Try our free blackjack games to practice the rules in a zero-risk environment, or explore live dealer blackjack for the closest experience to a real casino table.