Should you take insurance in blackjack? Learn how this side bet works, its high house edge, and why basic strategy players should almost always decline it.
Blackjack Strategy: Should You Take Insurance?
Insurance is one of the most misunderstood bets in blackjack, often presented as a way to protect your hand when the dealer shows an Ace. The bet is separate from your main wager and pays 2:1 if the dealer has a blackjack. While it sounds like a sensible hedge, the mathematics reveal it is generally a poor strategic choice.
This side bet is offered when the dealer's upcard is an Ace. You can wager up to half your original bet on insurance. If the dealer's hole card is a 10-value card, your insurance bet wins, and you break even on the hand. If not, you lose the insurance bet and play continues with your original hand.
How the Insurance Bet Works
When the dealer shows an Ace, they will offer "Insurance" before checking their hole card. You place a side bet equal to half your original wager. For example, if your main bet is $10, you can place a $5 insurance bet. If the dealer has blackjack, your insurance bet wins $10 (2:1 payout), offsetting the loss of your $10 main bet, resulting in a net zero for the round.
If the dealer does not have blackjack, you lose the $5 insurance bet immediately. The hand then proceeds normally with your original $10 wager still in play. The insurance bet is settled independently before the outcome of your hand against the dealer is determined.
- Offered only when dealer's upcard is an Ace.
- Maximum bet is half your original wager.
- Pays 2:1 if dealer has blackjack.
- Settled before the main hand continues.
The Mathematical Case Against Insurance
The fundamental reason to decline insurance is the house edge. In a standard game, the probability of the dealer having a 10-value card in the hole is 9/19, or roughly 47.4%, when you know nothing else. The insurance bet pays 2:1, which implies break-even odds at 33.3%. Since the true odds are worse, the house edge on insurance is over 5%.
This makes it one of the worst bets on the table from a pure odds perspective. Basic strategy players should never take insurance, as it increases their expected loss rate. The bet is designed to appeal to emotion—the fear of losing your main bet—rather than sound probability.
- True probability of dealer blackjack: ~30% (in a full shoe).
- Insurance bet implies a 33% break-even point.
- Resulting house edge: Approximately 5-7%.
- Consistently taking insurance erodes your bankroll.
The Exception: Card Counting and Insurance
For card counters, insurance can become a profitable bet, but only under specific conditions. Counters track the ratio of high cards (10s, face cards, Aces) to low cards remaining in the deck. When the count is significantly high, meaning many 10-value cards are left, the probability of the dealer having blackjack increases above the critical 33% threshold.
In these rare situations, the insurance bet shifts from having a negative expectation to a positive one. A common rule among counters is to take insurance only when the true count is +3 or higher in a balanced system. For the vast majority of players who do not count, this exception does not apply.
- Profitable only with a high "true count".
- Indicates a deck rich in 10-value cards.
- Requires advanced skill and practice.
- Irrelevant for casual or basic strategy players.
Even Money: A Special Case of Insurance
If you have a natural blackjack when the dealer shows an Ace, you may be offered "Even Money." This is essentially an insurance bet on your own blackjack. Accepting it guarantees a 1:1 payout on your hand immediately, regardless of whether the dealer has blackjack.
Mathematically, this is identical to taking insurance on your blackjack hand. Since you have a blackjack, you are already guaranteed at least a push (if the dealer also has blackjack) or a 3:2 win. Statistically, declining even money and playing out the hand has a higher expected value, as you will win the 3:2 payout more often than you will push.
Frequently Asked Questions
Is insurance ever a good bet in blackjack?
For a basic strategy player following the mathematical odds, insurance is never a good bet. It carries a high house edge. The only potential exception is for advanced card counters who have tracked that the remaining cards are disproportionately rich in 10-value cards, making the true odds favorable.
What should I say when offered insurance?
Simply say "No insurance" or just wave your hand horizontally to indicate you decline. There is no need to overthink it. Making a habit of politely refusing this side bet is a key part of disciplined, strategic blackjack play.
What's the difference between insurance and even money?
Even Money is a specific offer made only when you have a blackjack and the dealer shows an Ace. It's an insurance bet on your own natural. While it guarantees an immediate 1:1 payout, the expected value is lower than declining it and taking your chances on the 3:2 payout or a push.
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