Blackjack Insurance: We Simulated 1,000,000 Hands
The dealer shows an Ace, pauses, and asks the table: "Insurance, anyone?" It sounds like a sensible hedge, a small side bet that protects a big hand from a bad beat. It isn't a hedge. It's a separate wager with its own house edge, and for a player who isn't tracking the deck, that edge runs steeper than almost anything else at the table. Here's what one million simulated opportunities show it actually costs.
What is blackjack insurance?
- Offered only when the dealer's up-card is an Ace, before anyone's own hand is played out.
- The insurance wager is up to half the original bet — up to 2:1 of a $10 bet is a $5 insurance bet.
- It pays 2:1 if the dealer's hole card makes a blackjack.
- If the dealer doesn't have blackjack, the insurance wager just loses; it has nothing to do with how the main hand plays out from there.
- It's a fully separate bet from the player's own hand, settled immediately, before the round continues.
The math behind insurance
A 2:1 payout is only a fair bet if the dealer actually has blackjack at least 1 time in 3. Anything less than that and the wager loses money on average, no matter how it feels in the moment.
Here's the count: once the dealer's Ace is showing, a 6-deck shoe has 311 other cards left unseen (6 × 52 minus the one Ace showing). Of those, 96 are ten-value cards (6 decks × 16 tens, jacks, queens, and kings each) — the only cards that complete a dealer blackjack. That's:
96 / 311 ≈ 30.87%
Fewer than one in three, against a bet that needs one in three to break even. The gap between 30.87% and the 33.33% breakeven point is where the house edge on insurance lives — a bet you take because it feels protective ends up being one of the worse-priced wagers on the table for anyone playing off a fresh, unknown shoe.
1,000,000 opportunities simulated
Assumptions: a 6-deck shoe, only the dealer's Ace removed from the unseen cards (no additional information from the player's own hand factored in, to keep the math general), a $10 original bet, and a $5 insurance wager — the maximum allowed. Each of the 1,000,000 simulated opportunities is treated as an independent draw against that same 30.87% probability, seed 43.
| Metric | Value |
|---|---|
| Insurance opportunities simulated | 1,000,000 |
| Dealer blackjack frequency | 30.797% (307,971 of 1,000,000) |
| Total insurance wagered | $5,000,000 |
| Total insurance payouts (winning bets, 2:1 net) | $3,079,710 |
| Net result | -$380,435 |
| ROI on insurance wagered | -7.61% |
That -7.61% isn't a rounding artifact, it's close to the exact math: at a true 30.87% dealer-blackjack rate, every dollar put on insurance is worth about 7.4 cents less than the dollar the casino started with. Insurance carries one of the steepest house edges of any bet covered on this site, well past even a Baccarat Tie.
Smaller sample sizes, same 30.87% probability, show why a handful of insurance bets can look perfectly reasonable before the math catches up:
| Opportunities | Dealer blackjacks | Net result | ROI |
|---|---|---|---|
| 100 | 26 (26.0%) | -$110 | -22.00% |
| 1,000 | 306 (30.6%) | -$410 | -8.20% |
| 10,000 | 3,057 (30.6%) | -$4,145 | -8.29% |
A short run can land above or below the true rate in either direction. The 1,000,000-hand simulation is what that same 30.87% rate converges toward once volume is large enough to smooth the swings out.
Why insurance feels safer than it is
Insurance gets offered at exactly the moment a player is most anxious: a strong hand, maybe even a blackjack of their own, suddenly at risk of nothing more than a push against a dealer Ace. Paying $5 to "lock in" a good result feels like buying protection, the same instinct that makes real insurance a reasonable purchase elsewhere in life. But casino insurance isn't pooling risk across many players the way an actual insurer does; it's a fixed-odds side bet priced against a deck composition that doesn't favor the payout. The anxious moment is real. The protection isn't.
What about even money?
When the player already has a blackjack and the dealer shows an Ace, the dealer will sometimes offer "even money" instead of the insurance prompt: take a guaranteed 1:1 payout right now instead of waiting to see if the dealer also has blackjack (which would otherwise push, paying nothing extra).
Even money is the same bet as insurance wearing a different name. A player holding blackjack who declines even money and instead insures their own bet for the maximum ends up with the identical outcome in both cases: if the dealer has blackjack, the insurance pays enough to net exactly the original bet amount; if the dealer doesn't, the blackjack pays its normal 3:2 and the insurance is lost, netting the same result either way as taking even money up front. Mathematically identical bet, identical house edge, just offered under a friendlier-sounding name at the one moment a player is holding a winning hand.
Verdict
For a normal basic-strategy player who isn't counting cards, decline insurance. The deck composition needed to make it profitable, a ten-heavy shoe, is exactly the information a non-counter doesn't have. Assume a fresh, average shoe and the math above applies every time the dealer shows an Ace: a bet priced to need 33.33% and paying off at 30.87% is a bet that loses money over time, regardless of how protective it feels on any single hand.
See the full basic strategy chart, drill decisions on the strategy trainer, read the first-time blackjack guide for what else the dealer will ask at the table, or see how insurance's edge compares to every other bet on the casino house edge page.