If you’ve ever sat at a blackjack table—either in a physical casino or online—you’ve likely heard the dealer ask, “Insurance, anyone?” the moment an Ace is dealt as their upcard.
While it sounds like a safety net to protect your bet, blackjack insurance is one of the most misunderstood aspects of the game. Here is everything you need to know.
1. How Blackjack Insurance Works
Insurance is a side bet that is completely independent of your original wager. It only becomes available when the dealer’s face-up card is an Ace.
- The Cost: Insurance costs exactly half of your original bet. (Example: If you bet $20, the insurance bet is $10).
- The Goal: You are betting that the dealer’s “hole card” (the face-down card) is a 10, Jack, Queen, or King, completing a Blackjack.
- The Payout: If the dealer has a Blackjack, the insurance bet pays 2:1. If the dealer does not have a Blackjack, you lose the insurance bet and the hand plays out as normal.
2. The Possible Outcomes
Let’s look at what happens to your money in a typical scenario where you bet $20 and take $10 insurance:
| Scenario | Result of Main Bet ($20) | Result of Insurance ($10) | Net Total |
|---|---|---|---|
| Dealer has Blackjack | You lose $20 | You win $20 (2:1) | $0 (Even) |
| Dealer does NOT have Blackjack | Hand continues (may win/lose) | You lose $10 | Hand result minus $10 |
Summary: If the dealer has Blackjack, the insurance payout covers the loss of your main bet, allowing you to “break even” on the round. This is why it is called “insurance.”
3. The Math: Why the Odds Favor the House
On the surface, insurance seems like a smart move. However, looking at the probability shows why most professional players avoid it.
In a standard deck of 52 cards:
- There are 16 cards with a value of 10 (10, J, Q, K).
- There are 36 cards that are not 10s.
When the dealer shows an Ace, there are 51 cards remaining. For you to win the insurance bet, one of those 16 “10-value” cards must be the dealer’s hole card.
- The odds of the dealer having Blackjack are roughly 30.7%.
- The odds of them NOT having it are roughly 69.3%.
Because the payout (2:1) is lower than the actual odds of it happening (which are closer to 2.25:1), the House Edge on insurance is usually between 7% and 8%. This is significantly higher than the house edge on the standard game of blackjack (which is usually under 1% with basic strategy).
4. Should You Take Insurance?
The short answer for 99% of players is No.
- For Casual Players: You should never take insurance. Statistically, it is a “sucker bet” that will drain your bankroll over the long term. Even if you have a “good” hand (like a 20), taking insurance is still a mathematical mistake.
- The Only Exception (Card Counting): The only time insurance is a profitable move is if you are a professional card counter. If you know that the remaining deck is “rich” in 10-value cards (meaning more than 1/3 of the remaining cards are 10s), the odds shift in your favor, and taking insurance becomes a strategic move.
5. What about “Even Money”?
If you have a Blackjack and the dealer shows an Ace, they will offer you “Even Money.”
- This is the same thing as insurance.
- If you take even money, you get paid 1:1 on your blackjack immediately, regardless of whether the dealer has a blackjack or not.
- Strategic Advice: Just like insurance, you should decline even money. While it’s tempting to take the “guaranteed win,” you will make more money in the long run by refusing it and taking the 3:2 payout when the dealer doesn’t have it.
The Bottom Line
Blackjack insurance is not actually “insurance” for your hand; it is a proposition bet on whether the dealer has a 10 in the hole. Because the dealer will not have a 10 nearly 70% of the time, the smartest move is to simply say, “No insurance, thank you,” and focus on playing your hand using basic strategy.