A player gets dealt a natural blackjack on the second hand of his session. Ace, King. He has a $25 bet on the felt. At a 3:2 table, the dealer slides $37.50 across to him. At a 6:5 table next to him, the same hand pays $30. He's just lost $7.50 — not to bad strategy, not to variance, but to one line of small print that nobody read aloud when he sat down. Across the four-hour session he'll be dealt about ten naturals at 80 hands per hour. At 6:5 instead of 3:2 he's $75 down on payout alone before any other hand plays out. Over a year of casual Vegas trips, that's a thousand-dollar tax he pays for sitting at the wrong table.
6:5 blackjack is the single biggest avoidable cost in the modern casino, and it's the easiest one to dodge — the rule is printed on the felt in bold, it doesn't require math to spot, and every casino has 3:2 tables on the same floor if you walk past the 6:5s. The problem is that the 6:5 tables look identical to the 3:2 tables, they're often at lower minimum bets to lure recreational players in, and the rule is just one phrase among many on a busy layout. This post is the full math, the dollar impact at common bet sizes, and the two-second scan that saves you from sitting at a trap table for the rest of your blackjack career.
What 'blackjack pays 3 to 2' actually means
A natural blackjack — Ace + 10-value as your first two cards — pays a bonus over the standard 1:1 win. Under traditional rules, that bonus is 3:2 — you get $3 of winnings for every $2 you bet. On a $20 bet, a blackjack pays $30 (your original $20 stays plus $30 winnings, you walk away with $50). On a $25 bet, it pays $37.50. On a $100 bet, $150.
Under 6:5 rules, the bonus shrinks to 6:5 — $6 of winnings for every $5 bet. On a $25 bet, a blackjack pays $30, not $37.50. The difference per blackjack is $7.50 at the $25 table, $15 at $50, $30 at $100.
Blackjacks happen on roughly 4.8% of hands — about 1 in 21. Over 80 hands per hour, that's about 3.8 natural blackjacks per hour. Multiply the per-blackjack shortfall by the frequency and you get the hourly cost of the payout downgrade.
The 1.39% number
The canonical adjustment in any reference simulation — Wizard of Odds, the EV calculator in TableSharp's library at lib/casino-ev.ts, every published blackjack book in the last two decades — is +1.39% to the house edge when the BJ payout drops from 3:2 to 6:5. That's a third of a typical 'good game' baseline of 0.50% added in a single rule.
Stacked on a 6D H17 DAS no-LS table, the math runs:
- Base 6D S17 DAS 3:2: 0.50%
- Add H17: +0.22%, now 0.72%
- Switch to 6:5: +1.39%, now 2.11%
2.11% house edge is roulette territory — worse than American roulette's 2.7% on a single number, comparable to most non-roulette casino games. The 'easy' game with a 0.5% edge that recreational players think they're playing has been replaced by a game that costs four times more per hand. Same shop, same dealer, same drink service. One line of small print.
Dollars per hour, at every common bet size
Hands per hour at a blackjack table averages 80 in a typical shoe game. The math: house edge × bet × hands. Compared to a clean 6D S17 DAS 3:2 game at 0.50%:
- $10/hand, 6D H17 DAS 6:5 (2.11%): $16.88/hr lost. 4-hour session: $67.52. Versus the same game at 3:2 (0.72%): $5.76/hr. The 6:5 markup is $11.12/hr extra.
- $25/hand, 6D H17 DAS 6:5: $42.20/hr lost. 4-hour session: $168.80. Markup over 3:2: $27.80/hr.
- $50/hand, 6D H17 DAS 6:5: $84.40/hr lost. 4-hour session: $337.60. Markup over 3:2: $55.60/hr.
- $100/hand, 6D H17 DAS 6:5: $168.80/hr lost. 4-hour session: $675.20. Markup over 3:2: $111.20/hr.
At $25/hand, the 6:5 rule alone costs you $27.80/hr more than the same table with a 3:2 payout. Across a 4-hour Vegas session, that's $111.20 in pure payout penalty — the difference between coming home flat and coming home with a hundred-dollar gut punch. Across six trips a year, it's $667. Across twenty years of casual play, it's $13,000 — and none of it is variance, none of it is bad strategy, none of it is bad luck. It's the rule.
Why casinos switched to 6:5
Casinos started rolling out 6:5 in the early 2000s, originally on low-stakes Vegas Strip tables ($5 and $10 minimums). The pitch internally was that 6:5 lets the casino spread blackjack at a lower minimum bet without losing margin — a $5 table at 0.50% is barely profitable per square foot, but a $5 table at 2.0%+ is gold. The pitch externally to players was that the lower minimum was a feature: 'now you can play at $5 instead of $25.' The math, of course, is that you pay roughly 4x the hourly cost to do it.
By the mid-2010s, 6:5 had spread to single-deck and double-deck games specifically — casinos figured out that recreational players seeking 'the better game' would sit at single deck without reading the payout. By 2026, the majority of single-deck and double-deck tables on the Strip are 6:5. Most six-deck shoe games are still 3:2, though the cheap-minimum end (sub-$25) is increasingly 6:5 even at six decks.
How to spot a 6:5 table in two seconds
Look at the bottom-center of the felt, where the dealer would stand. Every blackjack table prints its BJ payout in big block letters as part of the layout. The phrasing is either:
- 'BLACKJACK PAYS 3 TO 2' = the good game (or as good as the rest of the rules allow)
- 'BLACKJACK PAYS 6 TO 5' = the trap. Walk past.
If the felt doesn't print the payout at all (rare in regulated jurisdictions, more common in cruise ships and tribal properties without state oversight), ASK before you bet. The dealer will tell you. 'Is this 3:2 or 6:5?' is a fair question in any casino in the world.
Some properties have started using 'pays 7:5' or 'pays 1:1 on blackjack' (yes, really — Caesars rolled out a 1:1 BJ table at one point) as further-degraded variants. The rule of thumb: anything other than 3:2 is a walk-away unless you have a specific reason (comp generation, hosted action, etc.) to play through it.
Why some players still sit at 6:5 tables
Three reasons recreational players knowingly play 6:5:
- Lower minimum. Some 6:5 tables are $5 or $10 minimum when the nearest 3:2 table is $25 or $50. For a player on a $200 bankroll, the lower minimum is what makes the game playable at all.
- Empty tables. 6:5 tables are often unpopulated (because experienced players walk past them), which means faster heads-up service for someone who likes the social pace.
- Comp generation. Casino hosts grade your action by 'theoretical loss' — hands × bet × edge. A 6:5 table generates 4x the theoretical loss of a 3:2 game at the same bet, which means 4x the comp credit. Some recreational players intentionally play 6:5 to qualify for hotel comps faster.
All three are valid trade-offs in their own way. None of them changes the math: 6:5 is more expensive than 3:2, and the player paying the higher cost should know they're paying it. The trap is sitting at a 6:5 table thinking it's the same game as 3:2 — that's the case to avoid.
If you can't find a 3:2 table
Some properties are entirely 6:5 below a certain bet level. Casual Vegas Strip casinos on the south end (Excalibur, Luxor, Tropicana) often have no 3:2 game under $25 minimum. If your bankroll won't support $25/hand, you have three options:
- Walk to a casino that spreads 3:2 at lower minimums (downtown Vegas, off-Strip, locals' casinos).
- Play a different game. A $5 craps pass-line bet is 1.41% — better than 6:5 BJ at 2.11%.
- Lower your hand frequency. If you're stuck at 6:5, play slower — sit one out occasionally, take longer breaks. The hourly loss scales linearly with hands played.
Of the three, option 1 is almost always the right move. Walking ten minutes to a 3:2 table saves more money than any other single decision a casual player can make in a casino.
The relationship to other rules
6:5 is the biggest rule penalty by a wide margin, but it doesn't exist in isolation. A 6:5 table is usually also paired with:
- H17 (+0.22%)
- No surrender (already absent from the baseline; no further penalty)
- Sometimes no DAS (+0.14%)
- Sometimes double restricted to 10 or 11 (+0.10%)
The full cost of a typical 6:5 table is rarely 'just' 1.39% over baseline — it's usually 1.5% to 1.8% once the other associated penalties are stacked. The trap is deeper than the headline number.