Double Down

Double Down is a blackjack option that lets you increase your bet on a hand after you receive your first two cards. You place an additional wager equal to your original bet, so your total stake becomes double. In return, you take exactly one more card and your turn ends right away. In most games, doubling down is only offered as your first decision for the hand, before you take any extra cards. The idea is straightforward: when your starting hand looks strong, you can try to earn more by raising the amount you have at risk. The trade-off is that you commit more money and you lose flexibility, since you cannot hit again after that single card.

How doubling down works

To Double Down, you first receive two cards and consider your total. If you choose to double, you add an extra wager equal to your original bet. In a live casino, players usually place the added chips next to the first wager, not on top of it. Many tables also use a simple hand signal, like pointing one finger down toward the felt, though the dealer will confirm your choice either way. In an online casino, this is usually a Double Down or X2 button next to your other action options. After you double, you receive exactly one additional card and your turn ends immediately. For example, you bet $10 and are dealt a 6 and 5 for 11\. You add another $10, making $20 in action. You draw a 10 for 21\. If you win, the payout is based on the full $20 stake.

When doubling down can be a good idea

Doubling down is most attractive when one extra card is likely to improve your hand and the dealer is more likely to run into trouble while drawing. Below are simple rule-of-thumb spots that often match basic strategy under common rules, though what is allowed can vary by table.

Total 11 on your first two cards (like 6+5): double against any dealer upcard from 2 to 10
Total 10 (like 6+4): double against 2 through 9
Total 9 (like 4+5): double against 3 through 6
A+7 (18): often doubled against 3 through 6 if the rules allow it
A+6 (17): often doubled against 3 through 6 if the rules allow it

Use these as a starting point. Always check the table rules first, since some games restrict which hands can Double Down.

Limits, risks, and common mistakes

Doubling down increases your upside, but it also increases your risk because you put more money in and you only get one extra card. If that card is poor, you cannot fix the hand by taking another. A common beginner mistake is doubling out of frustration while trying to win losses back quickly. Another common mistake is doubling against a strong dealer upcard, like a 10 or an Ace, when basic strategy does not support the play for your hand. Also check table rules, because some games restrict when you are allowed to double.