Perfect Pairs blackjack is ordinary blackjack with one extra betting spot: a side bet that your first two cards will be a pair. It pays whatever happens to your main hand, and it pays more the closer the two cards match. The most common schedule is 25:1 for a perfect pair, 12:1 for a coloured pair and 6:1 for a mixed pair. That looks generous. Below we count the cards and show why, in an eight-deck shoe, the bet still keeps about 4.1% of what you put on it.
On this page
- How the Perfect Pairs blackjack bet pays
- Counting the odds in an eight-deck shoe
- Why fewer decks make Perfect Pairs worse
- What the side bet costs over a session
- Perfect Pairs blackjack: mistakes that make it dearer
- Perfect Pairs blackjack at live and RNG tables
- Where to play crypto blackjack with side bets
How the Perfect Pairs blackjack bet pays
The bet looks only at the first two cards dealt to your hand. Three kinds of pair win:
| Pair | What it means | Example | Common payout |
|---|---|---|---|
| Perfect pair | same rank, same suit | two queens of hearts | 25:1 |
| Coloured pair | same rank, same colour, different suits | 7 of diamonds and 7 of hearts | 12:1 |
| Mixed pair | same rank, one red and one black | 10 of hearts and 10 of clubs | 6:1 |
A pair is ranked by face value, so a king and a queen are not a pair even though both count ten. These definitions and the 25:1, 12:1, 6:1 schedule are taken from the rules of play of a seven-seat live game, where the same table also pays a dealer pair on the dealer's first two cards, and from the published game description of Evolution's Infinite Blackjack.
Not every table uses that schedule. Pay tables that circulate include:
- 30:1, 10:1, 5:1
- 25:1, 12:1, 5:1
- 25:1, 15:1, 5:1
There is also a different bet called Perfect Pair (singular) on some live tables. It pays 25 for one perfect pair and 200 when both your cards and the dealer's form perfect pairs, and with eight decks its edge is about 8%. Same name, different bet. The info screen tells you which one the table runs.
Counting the odds in an eight-deck shoe
An eight-deck shoe holds 416 cards. Your first card can be anything; what matters is how many of the remaining 415 match it.
- There are eight copies of every card in the shoe. One is in your hand, so 7 cards make a perfect pair.
- The other suit of the same colour has eight copies of that rank: 8 cards make a coloured pair.
- The two suits of the other colour hold 16 copies: a mixed pair.
- That is 31 pairing cards out of 415. The other 384 lose the bet.
Now weight each result by its payout, for a one-unit bet:
| Result | Cards out of 415 | Chance | Pays | Contribution |
|---|---|---|---|---|
| Perfect pair | 7 | 1.69% | 25 | +175 |
| Coloured pair | 8 | 1.93% | 12 | +96 |
| Mixed pair | 16 | 3.86% | 6 | +96 |
| No pair | 384 | 92.53% | −1 | −384 |
| Total | 415 | −17 |
The bet loses 17 units for every 415 staked: a house edge of 4.10%, a return of 95.9%. That is the same 95.9% the Infinite Blackjack game description lists for its Perfect Pairs bet, which is what the arithmetic predicts for an eight-deck shoe.
Why fewer decks make Perfect Pairs worse
Players often assume a smaller shoe is friendlier. For this side bet it is the opposite. Your own card takes one matching card out of the shoe, and in a small shoe that one card is a large share of the matches left. With one deck there is no second queen of hearts at all, so a perfect pair cannot happen.
| Decks | Edge, 25:1 · 12:1 · 6:1 | Edge, 30:1 · 10:1 · 5:1 |
|---|---|---|
| 1 | 47.1% | 54.9% |
| 2 | 22.3% | 25.2% |
| 4 | 10.1% | 10.6% |
| 6 | 6.1% | 5.8% |
| 8 | 4.1% | 3.4% |
The same method prices the other tables at eight decks: 25:1, 15:1, 5:1 keeps about 2.2%, and 25:1, 12:1, 5:1 about 8.0%. Cutting the mixed-pair payout from 6:1 to 5:1 costs you almost four points, because mixed pairs are the pair you hit most often. Compare that with the main game, where a whole rule change rarely moves the edge more than a few tenths of a point (our house edge page lists them).
What the side bet costs over a session
The edge is a percentage of what you stake, so the side bet's size matters as much as its rate. Take 100 hands at a $20 main bet, an eight-deck table, 25:1, 12:1, 6:1:
| Side bet per hand | Staked on it | Expected cost of the side bet | Expected cost of the main game |
|---|---|---|---|
| none | $0 | $0 | about $9 |
| $2 | $200 | about $8.20 | about $9 |
| $5 | $500 | about $20.50 | about $9 |
| $10 | $1,000 | about $41 | about $9 |
A $5 side bet, a quarter of the main stake, roughly triples the cost of the session. Over those 100 hands you should expect about seven or eight pairs and one or two perfect pairs; most of the time the side bet is simply a second, smaller loss on every hand.
Play live and RNG blackjack with crypto.
Perfect Pairs blackjack: mistakes that make it dearer
- Reading 25:1 as the headline. A perfect pair comes about once in 59 hands with eight decks. The 6:1 mixed pair carries most of the bet's return.
- Choosing a table for its smaller shoe. Good for the main game, bad for Perfect Pairs. Price the side bet with the table above before you sit.
- Raising the side bet after a run without pairs. A pair is not due. Without a card count the chance on the next hand stays where it was.
- Confusing 25:1 with 25 for 1. "To one" pays 25 units and returns your stake; "for one" includes the stake. Read which one the pay table uses.
- Letting the side bet grow past the main bet. At that point most of the session's expected cost comes from the extra spot.
Perfect Pairs blackjack at live and RNG tables
On a live table the side bet sits next to the main betting spot and has to be placed inside the betting window; it is settled as soon as your two cards are on the table, before anyone acts. RNG tables work the same way, only faster, which means more side bets per hour at the same edge. On either, the pay table and often the return to player are printed in the info screen. If you play the main game with basic strategy, it pays to treat the side spot just as coolly: price it, cap it, and leave it empty when the session budget is spent. The wider comparison of side bets, from insurance to 21+3, is on our insurance and side bets page.
Where to play crypto blackjack with side bets
- 1
Vave
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- 2
Bitcasino.io
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Wild.io
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- 4
Cloudbet
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Halcyon Super Holdings B.V. · since 2013 · Licence Curaçao OGL/2024/328/0599 · 30 coins: BTC, ETH, USDT, LTC · Sportsbook on the same account
- 5
Stake
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The score counts what each casino publishes about licence, ID checks and limits, not how much we like the lobby.
Which side bets a table carries is set by the game studio, not by the casino, so the same casino can have tables with Perfect Pairs and tables without. Open the table's info screen before you bet: it shows the pay table, and from there the deck count gives you the edge. More on how live tables differ is on our live blackjack page.
Questions and answers
What does Perfect Pairs in blackjack pay?
On the most common pay table a perfect pair (same rank and same suit) pays 25:1, a coloured pair 12:1 and a mixed pair 6:1. Some tables use other schedules, so read the pay table in the game's info screen.
What is the house edge on Perfect Pairs?
With the 25:1, 12:1, 6:1 table it is about 4.1% in an eight-deck shoe and about 6.1% with six decks. The fewer the decks, the higher the edge.
How often do you get a pair as your first two cards?
In an eight-deck shoe 31 of the 415 cards left after your first card match its rank, so about once every 13 hands. A perfect pair comes about once in 59 hands.
Does the side bet depend on winning the hand?
No. It is settled on your first two cards only, so it can win while your main hand loses, and the other way round.