Blackjack Insurance and Side Bets: Why to Skip Them
Last reviewed: June 2026
Insurance and side bets are the two main ways casinos squeeze extra money out of blackjack players — insurance carries a ~5.88% house edge, and side bets range from 3% to 10% or more. On a 3:2 table with basic strategy, the main game’s house edge is roughly 0.5%. Every dollar you put on insurance or side bets is a dollar working at four to twenty times that disadvantage.
How insurance works
When the dealer’s upcard is an ace, the dealer pauses and offers insurance: you may wager up to half your original bet. If the dealer has a ten-value card in the hole — completing a blackjack — the insurance bet pays 2:1. If the dealer does not have blackjack, you lose the insurance wager and play continues normally.
The payout sounds fair until you look at the actual probability. In a standard six-deck shoe there are 96 ten-value cards (tens, jacks, queens, kings) among 311 remaining cards once the ace is visible. That means the dealer completes blackjack roughly 30.9% of the time, yet the break-even payout for a 2:1 bet would require the dealer to have blackjack exactly one time in three (33.3%). The casino pays you at 2:1 when the true price is closer to 2.23:1 — and that gap is where the house collects its profit.
The result is a ~5.88% house edge on the insurance wager, regardless of what cards you hold. That edge is the same whether you have a pair of fives, a stiff 16, or a blackjack natural. The contents of your hand do not change how often the dealer has a ten in the hole.
”Even money” is just insurance by another name
When you hold a blackjack and the dealer shows an ace, the dealer will often offer even money: take a guaranteed 1:1 payout right now rather than risk a push if the dealer also has blackjack. This is mathematically identical to taking insurance and then having the main bet resolve — it is the same wager dressed up as a courtesy offer. Basic strategy says to decline it every time. A blackjack on a 3:2 table pays $15 for a $10 bet when it wins; accepting even money collects only $10 and gives away the extra $5 expected profit over many hands.
Why the temptation is so strong
The psychology is straightforward: you have a natural 21 — the best hand in the game — and the dealer might match it. Taking insurance or even money feels like locking in a guaranteed win. It feels prudent.
The feeling is misleading. Even when the dealer completes blackjack, you merely push on the main hand — you do not lose. There is nothing to protect. The insurance bet adds a second wager at a steep disadvantage on top of a hand that is already heavily in your favor. Over hundreds of hands the math is clear: declining insurance every time costs nothing and saves you the 5.88% leak on every dollar you would have put on that side wager.
The one context in which insurance can be correct is card counting. Counters who know the deck is unusually rich in ten-value cards may find that the dealer’s blackjack probability exceeds 33.3%, making 2:1 a profitable price. For everyone else — basic strategy players and casual players alike — insurance is a losing bet every time it is offered.
Side bets: bigger payoffs, bigger edges
Casinos attach side bets to blackjack tables because the jackpot-style payouts attract attention and the house edges are two to ten times higher than the main game. The most common ones:
| Side Bet | What wins | Typical payout range | Approximate house edge |
|---|---|---|---|
| 21+3 | Your 2 cards + dealer upcard form a poker hand | 5:1 to 100:1 | 8–10% |
| Perfect Pair | Your first two cards are a pair | 5:1 to 25:1 | 3–4% |
| Bust Bonus | Dealer busts on a specific total | 1:1 to 50:1 | 7–9% |
| Lucky Ladies | Your two cards total 20 | 4:1 to 1000:1 | ~8–10% |
The wide payout ranges exist because the exact edge depends on how many decks the shoe uses and what the specific pay table is. A “Perfect Pair” side bet at 25:1 for a suited pair on a single deck has a very different edge from the same label on an eight-deck shoe with a 15:1 top pay. In every case, the expected loss rate is several times the main game’s 0.5%.
Some players enjoy the variance these bets provide — a 100:1 payout on a suited trip in 21+3 is exciting even if it rarely hits. The honest framing is that you are paying for entertainment, not finding an edge. If your session budget includes a few dollars for side bets, that is a valid personal choice. If your goal is to minimize expected loss and stretch your bankroll, skip every side bet on the table.
The math is not complicated
The house edge on the main blackjack game exists because of complex interactions across dozens of decision points. The house edge on insurance exists for a single reason: the casino pays 2:1 on an event that happens less than one time in three. There is no basic strategy adjustment that fixes it. There is no betting pattern that overcomes it. The correct play is always to decline.
For a full look at how blackjack payouts and probabilities connect, see Blackjack Odds and Payouts. To play a few hands and practice declining insurance at no cost, the blackjack game on LearnTheOdds lets you work through the decisions in real time.
Frequently asked
If I take insurance and the dealer has blackjack, don’t I break even overall? On that single hand, yes — the insurance wins 2:1 while the main bet pushes. But “breaking even” on one hand is not the measure of a good strategy. The insurance bet loses money in the long run because you will pay for it far more often than it pays you. Averaged across all the times you take it, you lose ~5.88 cents per dollar wagered on insurance. The main hand outcome is a separate calculation.
Are side bets ever worth playing? Not as a mathematical strategy. Every standard side bet is calibrated to a 3% or higher house edge. Skilled card counters can sometimes find situations where a specific side bet (particularly 21+3 or Lucky Ladies) has a positive count-adjusted edge, but this requires accurate running counts and a great deal of experience. For basic strategy players, side bets are always a net loss.
Does it matter what cards I hold when deciding on insurance? Only if you are counting cards. For a basic strategy player, the composition of your own hand is irrelevant to the insurance decision — you cannot see enough of the remaining deck to know whether the dealer’s hole card is a ten. The correct default answer is always no.
What is the best way to play blackjack with the lowest house edge? Use basic strategy on a 3:2 table, take no insurance, and skip all side bets. That combination holds the house edge to roughly 0.5% — among the lowest of any table game in the casino.
Sources & further reading
- Wizard of Odds — Blackjack House Edge & Insurance — insurance probability and edge calculations
- Wizard of Odds — Blackjack Side Bets — individual pay table edges for 21+3, Perfect Pair, and others
Educational explanation only. No real-money gambling happens on LearnTheOdds.
Responsible gambling: Play for entertainment, not income — the math favors the house over time. Set limits, never chase losses, and if it stops being fun, take a break. 21+. Need help? Call 1-800-MY-RESET (1800myreset.org).