Casino
Blackjack Side Bets Explained: 21+3, Perfect Pairs, Insurance and More
A blackjack side bet is an optional wager placed alongside the main hand before the cards are dealt.
Side bets can add excitement to a session, but they carry a higher house edge than standard blackjack. That is the trade-off you accept every time you place one.
What Is a Blackjack Side Bet?
Side bets sit outside the main blackjack decision tree. You can win or lose one without affecting the outcome of your primary hand, and most are settled from the first two or three cards only. That simplicity is part of the appeal, but it also means they are priced differently from the main game and are less favourable to the player.
The right way to think about them: extra action, not extra edge. Place them for entertainment, not because they improve your odds.
If you’re still getting to grips with the basics, our blackjack terms page covers the essential vocabulary before you go further.
Side Bet Payouts and House Edge At a Glance
| Side bet | What it usually pays for | Typical payout examples | House edge |
|---|---|---|---|
| 21+3 | Three-card poker-style combos from your first two cards and the dealer upcard | Up to 100:1 for a suited three of a kind | Typically 3-4% on standard paytables, up to 13%+ on less favourable variants |
| Perfect Pairs | Your first two cards form a pair | Up to 25:1 for a perfect pair | Typically 5-7% depending on paytable and number of decks |
| Lucky Lucky | Your first two cards plus the dealer upcard make total-based bonus hands | Up to 200:1 for a suited 777 | Typically 2-6% on standard paytables, higher on some variants |
| Buster Blackjack | The dealer busts with a specific number of cards | Up to 2000:1 for a dealer bust with eight or more cards + blackjack | Approximately 6% |
| Insurance | Dealer has blackjack when showing an Ace | 2:1 | Approximately 7.4% |
Paytables vary between casinos and game variants. Always check the rules at your table before placing a side bet.
If you are looking for the best blackjack side bets, the honest answer depends on what you mean by ‘best’. For entertainment value, 21+3 and Lucky Lucky both offer frequent small wins alongside the bigger payouts.
For house edge, Lucky Lucky on a standard paytable is generally the most player-friendly option on this list. But no side bet beats the main game in terms of value. That is the trade-off you accept every time you place one.
21+3
21+3 uses your first two cards and the dealer’s upcard to form a three-card poker hand. The bet wins if those three cards produce a qualifying combination – flush, straight, three of a kind, straight flush, or suited three of a kind.
Standard paytable:
- Flush: 5:1
- Straight: 10:1
- Three of a kind: 30:1
- Straight flush: 40:1
- Suited three of a kind: 100:1
The bet is placed before any cards are dealt and has no bearing on how you play the main hand. The appeal is clear: one small wager with a potentially large return if the opening cards cooperate. On standard paytables, the house edge is typically 3-4%, though less favourable variants can push it above 13%.
Perfect Pairs
Perfect Pairs pays when your first two cards form a pair. Three versions exist, each paying at a different rate.
Standard paytable:
- Mixed pair (same rank, different colour and suit): 5:1
- Coloured pair (same rank and colour, different suit): 10:1
- Perfect pair (same rank and suit): 25:1
You know the outcome within seconds of the deal, which makes this one of the fastest-resolving side bets at the table. The catch is that the more specific the match, the rarer it is, and the house edge on Perfect Pairs typically runs between 5% and 7% depending on the number of decks and the paytable used.
Lucky Lucky
Lucky Lucky is a three-card side bet based on your first two cards and the dealer’s upcard. It pays for total-based combinations, with the biggest prizes reserved for specific suited hands.
Standard paytable:
- Total of 19: 2:1
- Total of 20: 2:1
- Total of 21 (unsuited): 3:1
- Total of 21 (suited): 15:1
- 6-7-8 (unsuited): 3:1
- 6-7-8 (suited): 100:1
- 777 (unsuited): 50:1
- 777 (suited): 200:1
Lucky Lucky exists in multiple versions, and paytables vary considerably, so check the rules at your specific table. The house edge generally falls between 2% and 6% on standard paytables. The frequency of low-paying wins (totals of 19 and 20) gives the bet an active feel, which is part of why it’s popular.
Buster Blackjack
Buster Blackjack pays when the dealer busts. Unlike a simple yes-or-no proposition, the payout increases with the number of cards the dealer draws before going over 21.
Typical paytable (with blackjack in your hand, payouts are often higher):
- Dealer busts with 3 cards: 1:1 (or 2:1 with blackjack)
- Dealer busts with 4 cards: 2:1
- Dealer busts with 5 cards: 4:1
- Dealer busts with 6 cards: 18:1
- Dealer busts with 7 cards: 50:1
- Dealer busts with 8 or more cards: 250:1 (up to 2000:1 with blackjack)
The escalating payout structure makes the bet feel more dramatic than standard insurance-style wagers. The house edge is approximately 6%. Treat it as a volatility play – the high-end payouts are rare, and the bet adds nothing to the strategic value of the main hand.
Insurance
Insurance is offered when the dealer’s upcard is an ace. The bet pays 2:1 if the dealer’s hole card is a ten-value card, completing a blackjack. The main hand still plays out as normal regardless of the insurance outcome.
Unlike the other side bets on this page, insurance is not a bonus game built for extra excitement. It’s a specific defensive wager. And if the idea of managing risk in blackjack interests you, it’s worth reading about blackjack surrender too, which works on a different but related principle.
The headline figure is easy to remember: 2:1 payout if the dealer has blackjack. The problem is that the bet is priced against the true probability of the hole card being a ten-value card, which makes it a poor value proposition over time. The house edge on insurance is approximately 7.4%.
Are Blackjack Side Bets Worth It?
Side bets are worth placing if you want extra excitement and you are comfortable paying for it. They can make a session feel faster and more varied, particularly when the opening cards are delivering strong combinations.
They are not worth placing if your goal is the best mathematical return. Every side bet on this page carries a higher house edge than optimal basic strategy blackjack. That is not a flaw in how they are marketed; it’s simply how they are designed. The payouts look large because the wins are rare.
The honest verdict: side bets are entertainment wagers. If you choose to place them, set a clear budget for them separately from your main game and treat any return as a bonus.
If you enjoy games with additional betting layers, Blackjack Switch offers a different kind of variation worth exploring.
Key Takeaways
- A blackjack side bet is an optional wager placed before the cards are dealt, separate from the main hand.
- All side bets carry a higher house edge than standard blackjack play.
- 21+3 pays for three-card poker-style combinations using your two cards and the dealer’s upcard.
- Perfect Pairs pays up to 25:1 when your first two cards form a pair of the same rank and suit.
- Lucky Lucky pays for total-based combinations from three cards, with up to 200:1 for a suited 777.
- Buster Blackjack pays when the dealer busts, with escalating payouts for more cards drawn.
- Insurance pays 2:1 if the dealer has blackjack and has an approximately 7.4% house edge.
- Side bets are best approached as entertainment, with a separate budget from the main game.
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