What Is Four Betting in Poker — and How Should You Use It?

The Basic Definition

A four-bet is the fourth aggressive action in a single betting sequence. Here is how those actions stack up:

1. The open raise — the first player to raise pre-flop (or on any street).
2. The three-bet — a re-raise made over the top of the open raise.
3. The four-bet — a re-raise over the three-bet.
4. The five-bet — a further re-raise, which in most standard games effectively signals an all-in or near all-in commitment.

Most discussions of four-betting take place in the pre-flop context, and for good reason: that is where the vast majority of four-bets occur in No Limit Texas Hold'em. However, the concept applies post-flop as well, any time there have been three aggressive actions before yours on that street.

To make it concrete: the player under the gun opens to 3 big blinds. The hijack folds. The cutoff three-bets to 9 big blinds. Action folds to you in the big blind, and you raise to 22 big blinds. That raise is your four-bet.

Why Four Betting Exists as a Strategy

Poker is ultimately a game of incomplete information. Each aggressive action you take communicates a range of hands to your opponent, and each response refines that communication further. The three-bet is already a significant narrowing of ranges — most players three-bet with strong hands or as a well-timed bluff. So when someone four-bets, the message is even sharper. It says: I am not just calling or folding, and I am not simply re-raising. I am escalating the pressure to a level where you must make a very serious decision.

A legitimate four-bet accomplishes several things simultaneously. It builds the pot when you have a monster hand. It applies maximum pressure on opponents who are three-betting too liberally. It forces opponents to define their own range by either folding, calling, or committing even more chips. And in some cases, it simply wins the pot immediately when your opponent's three-bet was a bluff or a marginal squeeze.

Value Four Bets vs. Bluff Four Bets

Just as three-bets are divided into value hands and bluffs, your four-betting range should contain both. The exact construction of that range depends heavily on position, stack depth, and opponent profile.

Value four-bets are made with hands that want to get as much money in as possible before the flop. In most games, these are pocket Aces, Kings, and Queens, as well as Ace-King suited. Some aggressive players extend their value range down to Jacks, Tens, and Ace-King offsuit depending on the situation. These hands are strong enough that they are genuinely happy to get all the money in pre-flop against most three-betting ranges.

Bluff four-bets are the more nuanced part of the equation. If you only ever four-bet with Aces and Kings, thinking opponents will quickly catch on and simply fold every time you put in that fourth raise. This makes you exploitable. Bluff four-bets are usually hands that have some decent equity if called — suited connectors with blockers to strong hands, or Ace-x suited hands that block Ace-Ace and Ace-King combinations in your opponent's range.

The ratio of value to bluff in a four-betting range is a topic of serious study in modern poker theory, but a simple principle to start with is: bluff four-bet with hands that have a high fold equity against the three-bettor and reasonable equity when called.

Sizing Your Four Bet Correctly

Size matters significantly with four-bets. Too small and you give your opponent an easy call with a wide range of hands; too large and you fold out too many bluffs and only get action from the very top of their range.

In live poker with 100 big blind effective stacks, a standard four-bet is typically somewhere between 2.2 and 2.5 times the three-bet size. If the three-bet was to 9 big blinds, your four-bet might be around 20 to 22 big blinds. This forces your opponent to put in a substantial portion of their stack to continue, making it a genuinely uncomfortable decision unless they have a premium holding.

In online poker, where stack-off tendencies and rake structures differ, sizings can vary. Shorter stack games — say, 40 to 60 big blind effective stacks — often see four-bets that commit so much of the stack that they are functionally all-in shoves. Understanding when you are pot-committed is essential to avoiding the mistake of four-betting a size that awkwardly leaves you with only a small stack behind.

Positional Considerations

Position is one of the most powerful factors shaping whether and how you four-bet. Four-betting from out of position is risky because even if your opponent calls, you will be playing a bloated pot from the difficult out-of-position spot for every subsequent street. This does not mean you never four-bet out of position — with Aces or Kings you should always be happy to do so — but it should inform how you build your bluffing range.

Four-betting in position, by contrast, gives you the best of both worlds: you put in maximum pressure pre-flop while retaining the positional advantage post-flop if called. This is one reason why the button is such a powerful four-betting seat. Players on the button can four-bet a slightly wider range of bluffs than they could from the blinds, because a call does not surrender the post-flop advantage.

Reading Your Opponent Before You Four Bet

No strategy discussion is complete without the human element. Before you four-bet, you should have a mental profile of the player who three-bet you. Is this a tight, solid player who three-bets only with the top of their range? Is it a loose, aggressive player who three-bets frequently and folds to pressure? Is it someone running on tilt who is gambling with suboptimal hands?

Against a tight, infrequent three-bettor, your bluff four-bets have less fold equity and should be deployed sparingly. Against a player who three-bets a wide range and then folds to four-bets often, bluff four-betting becomes a highly profitable play. If you are playing at an online platform — whether it is a dedicated poker room or a site like Bet-on-red-casino.dk that offers poker alongside other table games — making notes on opponent tendencies between sessions can be the difference between a profitable and losing four-bet bluffing frequency.

Stack depth also plays into this. Against an opponent who is deeply stacked (150+ big blinds), a four-bet does not automatically commit either player. Against a shorter stack, a four-bet might represent so much of the effective stack that there is no turning back for either party.

Common Four Betting Mistakes

Even players with a solid understanding of the concept make recurring errors. Here are the most common:

• Four-betting too large out of position: This bloats the pot while simultaneously removing the weaker hands from your opponent's calling range, meaning you only get action when you are beat or in a coin flip.
• Never bluff four-betting: A four-bet range with no bluffs is transparent and exploitable. Opponents will simply fold everything but their best hands.
• Four-betting the wrong bluff hands: Bluffing with hands that have little equity when called (and do not block strong hands in opponent's range) is a leak. Choose bluff four-bets that either block the calling range or have reasonable equity.
• Ignoring stack depth: Four-betting into a short stack without realising the effective stack forces an all-in is a costly mechanical error.
• Always four-betting Aces: While value four-betting with Aces is usually correct, there are specific table dynamics — such as when a player behind you is known to five-bet shove light — where slow-playing or just calling the three-bet is the higher expected value play.

Four Bets in Tournaments vs Cash Games

The role of the four-bet shifts considerably between tournament and cash game settings. In cash games, stacks are often deep enough that a four-bet does not end the hand — there is still meaningful post-flop play to come. In tournaments, especially once the average stack shrinks to 30 or 40 big blinds, the four-bet is almost always a commitment to getting all the chips in. Tournament players must therefore be more cautious with bluff four-bets, because the downside of being wrong is elimination rather than a rebuy.

In the late stages of a tournament, with pay jumps looming, a failed four-bet bluff can cost far more in tournament equity than the pot odds alone suggest. ICM pressure — the Independent Chip Model, which assigns real dollar values to chip stacks based on prize structure — should always inform how liberally you four-bet in tournament play. What is a marginally profitable bluff in a cash game might be a clear mistake at a final table bubble.

Building Four Bet Ranges: A Practical Starting Point

For players looking to structure their four-betting ranges more deliberately, a straightforward starting framework is:

• Value: Aces, Kings, Queens, Ace-King suited (and possibly offsuit depending on position)
• Bluffs: Ace-x suited hands (particularly Ace-2 to Ace-5 suited, which block Aces and have backdoor flush potential), and occasionally suited connectors like Jack-Ten suited or King-Queen suited in position

This framework should be refined over time based on the specific opponents you face and the patterns you observe in their three-betting tendencies. Poker is ultimately a game of adjustments, and your four-bet range is one of the most powerful levers you can pull to exploit or counter-exploit your opponents.

The Bigger Picture

Mastering the four-bet is about far more than memorising a sizing or a hand list. It requires understanding the story each betting action tells, the math behind stack-to-pot ratios, the psychological reality of applying pressure at the table, and the discipline to balance your range properly over many hands. When you four-bet correctly, you are not just making a single good play — you are signalling to your opponents that your entire game is structured, balanced, and hard to exploit. That reputation has value that extends well beyond any single pot.