If you enjoy blackjack and want a fresh way to spice up a hand, the 21+3 side bet adds an extra layer of excitement without changing the core game. It’s an optional wager made alongside your normal bet that turns your two cards and the dealer’s upcard into a three-card poker-style contest.
One of the most talked-about outcomes on the 21+3 menu is suited trips — a rare combination that brings the biggest payouts when it does appear. This guide explains what suited trips is, how the side bet works, typical payouts and odds, and how to choose where to play, all in plain English. Read on to find out what makes suited trips special and what to expect when you place the extra wager.
What Is the 21+3 Side Bet in Blackjack?
The 21+3 side bet is an optional extra placed before cards are dealt. Rather than competing with the dealer for 21, this bet looks solely at three cards: a player’s two initial cards plus the dealer’s upcard. Those three cards form poker-style hands that pay according to how rare the combination is.
Hands are ranked much like three-card poker: flushes, straights, three of a kind and so on. Because the side bet evaluates just those three cards, it runs independently of the outcome of the main blackjack hand. That gives players a second way to win on a single round, while keeping the standard blackjack strategy and decisions unchanged. Next, we’ll look specifically at the rarest of those hands — suited trips — and why it pays so well.
How Do Suited Trips Work in 21+3?
Suited trips is the top-tier result for the 21+3 bet. It happens when your two cards and the dealer’s upcard all share the same rank and the same suit — for example, three sevens of clubs. Both rank and suit must match across all three cards, so it’s considerably more restrictive than a plain three of a kind or a flush.
Because all three cards must be identical in rank and suit, suited trips are exceptionally uncommon, which is why casinos offer the highest payout for it. There isn’t a strategic choice that increases the chance of hitting suited trips; it depends on how the deck is shuffled and dealt. Understanding that rarity helps explain the payout table you’ll commonly see at tables and live games.
Payouts for Suited Trips and Other 21+3 Winning Hands
Payouts for the 21+3 side bet vary by game, but they follow the relative rarity of each three-card hand. Typical payouts might look like this:
- Suited trips: Often pays 100 to 1
- Straight flush: Usually pays 40 to 1
- Three of a kind: Typically pays 30 to 1
- Straight: Generally pays 10 to 1
- Flush: Usually pays 5 to 1
These amounts are examples; individual tables and online games may offer different rates. The structure rewards hands in proportion to how unlikely they are to occur, which is why suited trips commands the largest single payout. With the payout structure in mind, it’s helpful to consider the actual likelihood of seeing these hands at the table.
What Are the Odds of Getting Suited Trips?
Suited trips is the rarest outcome on the 21+3 card list. Using a standard 52-card deck, the probability is extremely low — commonly quoted around 0.01%, or roughly 1 in 5,200 hands. That figure shifts slightly depending on the number of decks in play, because more decks change the total number of possible combinations.
The maths behind those odds is straightforward: for suited trips, all three cards must match both rank and suit, and there are very few combinations that satisfy that requirement across a shuffled shoe. Because the chance is so small, the potential reward is large, but the expected return over many hands is governed by those long odds.
House Edge: Is the 21+3 Bet Worth It?
The 21+3 side bet usually carries a significantly larger house edge than standard blackjack. While well-played blackjack can offer a low house edge, the side bet’s edge typically sits between about 3% and 8%, depending on the exact payouts and deck count.
That higher edge means the side bet is unlikely to be profitable as a long-term investment; its appeal is the prospect of infrequent, substantial wins rather than steady returns. Players who enjoy occasional big payouts often treat the 21+3 bet as entertainment value added to a hand of blackjack, keeping stake sizes modest relative to their main-bet bankroll. With that perspective, the next section explains where to find games and what to look for when choosing a place to play.
Common Misconceptions About Suited Trips
Several myths circulate about suited trips and the 21+3 side bet. One is that suited trips happens relatively often; in reality it is one of the rarest three-card combinations. Another is that players can use betting patterns or decisions to increase their chances — there’s no action during the round that affects those three cards once they’re dealt.
Some people assume the large payout makes the side bet a good value long-term. Although a single win can be transformative for a session, the low probability means the math usually favours the house over many hands. Recognising these points helps set realistic expectations: treat the side bet as an occasional thrill rather than a change to core blackjack strategy.
Where Can I Play Blackjack with the 21+3 Side Bet?
Many licensed online casinos and some land-based tables include 21+3 as an optional side bet, often available in both live dealer and digital versions of blackjack. Availability depends on the operator and the specific game offering, so it pays to check the rules screen or table layout before placing the side wager.
Only players aged 18 or over should take part in real‑money games. Look for regulated sites and venues, clear payout tables, and transparent terms so you know exactly how the 21+3 payouts and rules work. Responsible-play tools such as deposit limits and time-out features are commonly provided; using them helps ensure play stays within comfortable limits and remains enjoyable.
Comparing 21+3 to Other Popular Blackjack Side Bets
The 21+3 side bet stands out by combining your two cards with the dealer’s upcard to form poker-style hands, which offers a distinct flavour compared with bets that examine only the player’s cards. For instance, Perfect Pairs focuses exclusively on whether a player’s first two cards form a pair and pays more for same-suit pairs, while other bets such as Lucky Ladies revolve around specific card totals or combinations involving face cards.
Each side bet has its own payout structure and house edge, so preferences come down to whether a player likes the larger-but-rare payouts of 21+3 or the different risk profile of alternatives. Choosing between them is a matter of taste and how much one wants to add to a standard blackjack session.
Is the 21+3 side bet available at all blackjack tables?
Not all blackjack tables offer the 21+3 side bet. Availability varies by casino and game version.
What cards make up the 21+3 side bet hand?
The hand consists of the player’s two initial cards plus the dealer’s upcard, judged as a three-card poker hand.
How rare is it to get suited trips?
Suited trips is extremely rare, which is why it carries the highest payout among the 21+3 hands.
Can you use strategy to improve your chances with 21+3 or suited trips?
No. The cards are dealt randomly and no in-round decision affects the three-card combination.
Are there age restrictions for playing 21+3?
Yes. Players must be at least 18 years old to gamble for real money in the UK.
Play the side bet with a clear understanding of its odds and payouts, and keep stakes in proportion to what you can afford. With that approach, suited trips and the rest of the 21+3 menu can add an entertaining, high-stakes element to a standard blackjack session — and now you know what to expect if you decide to try it.
**The information provided in this blog is intended for educational purposes and should not be construed as betting advice or a guarantee of success. Always gamble responsibly.