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A 4-bet is the second re-raise in a pre-flop betting sequence; this explainer breaks down the numbering, the reasons behind it, and common sizing.
By Anja Wiedenhöft · September 11, 2026 · 5 min read
A 4-bet is the fourth bet in a pre-flop betting sequence: a re-raise made after someone has already re-raised. In the usual counting, the big blind is the 1-bet, the first raise is the 2-bet, the re-raise is the 3-bet, and the next re-raise is the 4-bet.
A 4-bet is the fourth bet in a single pre-flop betting sequence — in plain terms, a re-raise made after an opponent has already re-raised. It sounds more complicated than it is, and the confusion usually comes from the numbering rather than the action itself. Once you see how poker counts bets, the term becomes obvious, and 4-betting becomes just another tool for applying pressure before the flop.
Because a 4-bet commits a meaningful share of a stack, it carries weight. It tends to represent a strong range, and it forces opponents into difficult decisions for a large pot. Understanding when a 4-bet is for value and when it might be a bluff is part of reading pre-flop play accurately.
The key is that poker counts bets , not raises. In No-Limit Hold’em the forced big blind already counts as the first bet of the hand. So the sequence runs as follows, and the numbering falls out naturally.
So a 4-bet is simply the second re-raise. Calling it a fourth bet keeps the language consistent all the way up the chain, which is why you will also hear about 3-bets and, more rarely, 5-bets.
There are two broad reasons, and telling them apart is the heart of good pre-flop play. The first is value . With a premium hand you want to build the pot against a range that has shown strength by 3-betting. A 4-bet grows the pot while you are likely ahead, and it may fold out hands that would otherwise draw out cheaply.
The second reason is the 4-bet bluff . Because a 4-bet represents such a strong range, it can fold out hands that are genuinely good but not good enough to continue for a very large pot. Skilled players sometimes 4-bet with hands that are not yet strong, choosing holdings that retain some potential in case they are called. Mixing bluffs with value keeps opponents from simply folding everything but the very best hands.
Sizing follows the maths of the growing pot. Each re-raise makes the pot larger, so a 4-bet is usually smaller relative to the bet it faces than a 3-bet was relative to the open. You do not need to make it huge to apply real pressure, because the pot is already substantial and the chips behind are shrinking.
Stack depth is decisive. With shallow stacks a 4-bet can effectively commit you, meaning a fold afterwards would be a serious mistake. With deep stacks there is more room to manoeuvre and more danger in over-committing with a marginal hand. There is no fixed number that fits every table; the right size depends on positions, stack depth and whether you are betting for value or as a bluff.
Position shapes almost every pre-flop decision, and 4-bets are no exception. Acting last gives you more information and more control, so 4-betting in position is generally more comfortable. Out of position you will face harder decisions on later streets, so many players tighten the range they are willing to 4-bet when they must act first.
Who your opponent is matters just as much. Against a player who 3-bets often, a 4-bet — for value or as a well-chosen bluff — gains credibility because their range is wider. Against a very tight player who only 3-bets premium hands, 4-betting light is far riskier. Reading tendencies is more valuable than any rule of thumb.
If someone re-raises your 4-bet, that is a 5-bet . In most cash games a 5-bet is close to committing all the chips, so it is rare and usually means either a very strong hand or a bold bluff. Facing a 4-bet, your realistic options are to fold, to call and see a flop, or to move all-in. Which is best depends on your hand, your read and the stack depths involved.
One frequent error is 4-betting a hand that is too strong to fold but awkward to play for a large pot, and then losing your bearings when re-raised. Because a 4-bet commits so many chips, you should have a plan for facing a 5-bet or an all-in before you make the raise. Deciding in advance whether you are betting for value, and how you will respond to pressure, avoids costly hesitation.
Another mistake is choosing poor bluffing hands. A 4-bet bluff with a hand that has no way to continue leaves you with nothing when called. Many players prefer bluffing with holdings that retain some potential, so that a call still leaves room to improve. Finally, ignoring stack depth is a classic error: a 4-bet that looks reasonable deep-stacked can be an over-commitment when the chips behind are short, turning a flexible play into a forced all-in.
Yes, but carefully. A sensible starting point is to 4-bet mainly for value with premium hands while you build experience, and to add bluffs only as your reads improve. Because a 4-bet commits so many chips, mistakes here are costly, so it rewards patience and clear thinking. Like every play in poker, it does not guarantee a result on any given hand; it is a decision that, used in the right spots, improves your expected value over the long run. Master the numbering, respect stack depth and position, and the 4-bet stops being intimidating and becomes a normal part of your pre-flop game.
Poker counts bets, not raises. The big blind counts as the first bet, the open raise as the second, the re-raise as the third and the next re-raise as the fourth, so a fourth bet is a 4-bet.
Not always. Many 4-bets are for value with premium hands, but experienced players also 4-bet as a bluff with selected hands to avoid becoming predictable and to apply maximum pressure pre-flop.
A 4-bet is often smaller relative to the bet it faces than earlier re-raises, because the pot is already large. Exact sizing depends on stack depth, position and whether the raise is for value or as a bluff.
A 4-bet bluff is a re-raise made with a hand that is not yet strong, aiming to fold out better hands. Players often choose hands with some potential so they retain equity if called.
A re-raise over a 4-bet is a 5-bet. In many games this is close to committing all the chips, so 5-bets are rare and usually represent either a very strong hand or a bold bluff.