Bet insurance on a $10 hand runs about 22 cents per shoe at a full table. That's the expected cost of insuring every hand that calls for it — roughly 14 qualifying hands across a 70-hand shoe — once you account for the fact that insurance is a 2.27% house-edge side bet paying 2:1 on a 1-in-3 proposition. It's a small number that behaves like a subscription: cheap per shoe, expensive per session, and almost never worth buying.
Where the 22 cents comes from
Insurance costs half your original wager and pays 2:1 when the dealer has a ten underneath. On a $10 bet that's a $5 insurance stake. The bet wins when the dealer's hole card is a ten-value card — 16 of the 52 unseen cards in a single deck, or about 30.8% of the time in a neutral shoe.
The fair payout on a 1-in-3.25 proposition is closer to 2.08:1. Paying 2:1 leaves a gap, and that gap is the entire house edge: 2.27% of the insurance stake. On $5, that's 11.35 cents per insured hand in expected loss. Multiply by the 2 hands per 10 that trigger the offer — about 14 in a 70-hand shoe — and you land at roughly 22 cents per shoe, per $10 box.
At a full seven-seat table, that's about $1.54 per shoe in aggregate expected loss from insurance alone. Over a four-hour session at 70 hands an hour, a single player taking insurance every time it's offered burns about 89 cents — not catastrophic, but it's money with zero upside beyond variance.
Why the count matters more than the price
The 22-cent figure assumes a neutral shoe. Insurance is the one blackjack side bet where card counting actually flips the math. The bet becomes profitable when the ratio of ten-value cards to non-tens among unseen cards exceeds 1:2 — in Hi-Lo terms, a true count of +3 or better.
In a six-deck shoe, that condition shows up in maybe 2-4% of shoes, usually deep in the shoe after a run of low cards. If you're not tracking, you're taking the 2.27% edge on every offer. If you are, you're taking it only when the shoe is ten-rich, and the rest of the time you're passing. The 22 cents is what the first group pays; the second group pays close to nothing and occasionally gets paid.
The even-money alternative most players skip
Many casinos offer "even money" on a blackjack against a dealer ace. It's mathematically identical to insuring a blackjack — same 2.27% edge, same expected cost — but it feels different because it's framed as a guaranteed win rather than a side bet. On a $10 blackjack, even money locks in $10 instead of risking a push. The expected value is the same 11.35 cents given up per occurrence. The framing is the only difference, and it's why even money gets taken at roughly triple the rate of insurance at most tables.
What 22 cents per shoe actually implies
The number is small enough that most players dismiss it, and that's the interesting part. A 2.27% edge on a $5 side bet is trivial in isolation. But insurance is offered on roughly 20% of hands, and the players who take it tend to take it every time — not selectively. That's a steady drip that widens the house edge on the whole game from about 0.5% (with basic strategy) to closer to 0.7% for a player who insures indiscriminately.
The open question is whether that 22 cents is worth the entertainment. For a player who enjoys the side bet and treats it as part of the session's cost, it's cheaper than most slot spins and far cheaper than a bad side bet like Perfect Pairs. For a player grinding out a small edge with basic strategy, it's a leak that erases a meaningful chunk of the advantage they've worked to build. The math doesn't care which camp you're in — but the decision does, and it's worth making before the shoe starts rather than at the moment the dealer flips an ace.