Only two hands beat four aces in poker, a straight flush and a royal flush. Every other hand loses to quad aces at showdown. What surprises many players is that even the lowest possible straight flush, such as 2-3-4-5-6 of the same suit, beats four aces, because straight flushes rank above all four-of-a-kind hands as a category, regardless of card values.
I tell students that when you hold four aces, the only boards worth pausing on are those showing four connected cards of the same suit, because those are the only boards where a straight flush becomes realistically possible for your opponent.
If you’ve ever wondered what beats 4 aces in poker and how this hand stacks against the rest, this guide breaks it down clearly.
Royal Flush vs Quad Aces
Royal Flush, which consists of five highest cards of the same suit (for example, A♠ K♠ Q♠ J♠ 10♠), is the strongest possible combination, so it naturally beats four aces in poker. If you’re holding quad aces, the royal flush will always win.
A royal flush beating four aces is the definition of a cooler in poker, where two extremely powerful hands collide and both players played correctly. In my experience, the players who handle this situation best are those who have already mentally accepted the theoretical possibility before it happens.
When you hold quad aces and the board contains four Broadway cards of the same suit, the possibility that your opponent has the fifth card completing a royal flush exists. It is so unlikely that folding is essentially never correct, but acknowledging the scenario means you are not psychologically unprepared when it occurs. The correct play in nearly every spot is to continue getting value from the many opponents who hold worse hands than a royal flush.
Does a Straight Flush Beat Four Aces?
Yes, a straight flush does beat four aces. A straight flush is a sequence of five cards in a row, all of the same suit (for example, 5♦ 6♦ 7♦ 8♦ 9♦). Since straight flushes rank above any four of a kind, even four aces will lose to one.
The fact that any straight flush beats four aces, including the 2-3-4-5-6 suited, is one of the most counterintuitive aspects of poker hand rankings for new players.
The logic becomes clear when you understand that the rankings are based on mathematical rarity: straight flushes as a category (40 total combinations including royal flushes) are rarer than four of a kind (624 total combinations), so the entire straight flush category ranks above the entire four-of-a-kind category.
This means a low straight flush beats even four aces. For practical purposes at the table, when you hold four aces and the board shows a potential straight flush draw completing, the only honest strategic question is whether a bet or check maximizes value against the range of hands your opponent could realistically hold.
In most cases, the opponent does not have the straight flush, and maximizing extraction should be the priority.
Hand Rankings: What Beats Four of a Kind?
Here’s a quick ranking overview showing where four of a kind (including four aces) stands compared to other top poker hands:
| Poker Hand | Example | Beats Four Aces? |
|---|---|---|
| Royal Flush | A♠ K♠ Q♠ J♠ 10♠ | ✅ Yes |
| Straight Flush | 5♦ 6♦ 7♦ 8♦ 9♦ | ✅ Yes |
| Four of a Kind (other than quod aces) | Q♣ Q♦Q♥ Q♠ J♣ | ❌ No |
| Full House | 10♣ 10♦ 10♥ K♠ K♦ | ❌ No |
| Flush | 2♠ 6♠ 9♠ J♠ K♠ | ❌ No |
| Straight | 4♣ 5♦ 6♥ 7♠ 8♣ | ❌ No |
To put the rarity in perspective, here are the only hands that beat four aces and how rare they are in five-card draw:
| Hand | Possible 5-card combinations | Beats four aces? |
|---|---|---|
| Royal flush | 4 | Yes |
| Straight flush (non-royal) | 36 | Yes |
| Four of a kind (non-aces) | 576 | No |
| All other hands | Hundreds of thousands | No |
There are exactly 40 five-card combinations in a standard deck that beat four aces, made up of 4 royal flushes and 36 non-royal straight flushes. In Texas Hold’em, the probability of four aces losing is approximately once every 13 million hands, and the probability of losing specifically to a royal flush is approximately 2.7 billion-to-1. When I review student hands where four aces got beat by a straight flush, the strategic lesson is almost never that you should have folded. The practical question is whether the pot was maximized before the bad beat occurred.
Conclusion
So, what beats four aces in poker? Only the straight flush and the royal flush.
While extremely rare, these hands will beat any four of a kind, including quod aces. That said, you’re almost guaranteed to win if you’re holding four aces, so never be afraid to put your stack on the line.