What Is a 5-Bet in Poker? Sizing, Ranges and When to Jam
Most preflop pots end after a raise or a 3-bet. Once in a while the betting keeps climbing: someone opens, someone 3-bets, the opener 4-bets, and then the 3-bettor fires one more shell. That last one is the 5-bet, and by the time it lands the pot is usually all the chips. It is the top rung of the preflop raising war, and it is one of the few spots where you can put 100 big blinds in the middle before a single community card is dealt.
It looks scary, but a 5-bet is simpler than it seems. At 100bb it's almost always all-in, which turns it into a clean call-or-fold problem. This guide covers the whole ladder, why the numbering works the way it does, how a 5-bet is sized, the tiny value-and-bluff range it uses, and what to do when one gets shoved in your face. If you have not read our 4-bet guide yet, the 5-bet is the answer to it, so the two go together.
The Preflop Betting Ladder: How We Get to Five
The numbering confuses people because it does not match the number of raises. The trick is that the big blind counts as the first bet. Everything is numbered from there:
So an open is technically a 2-bet (nobody calls it that, but that is why the next raise is a 3-bet). A 3-bet is the first reraise, a 4-bet is the second, and a 5-bet is the third reraise. Notice the sizes: a 3-bet is about 3 times the open, a 4-bet a bit over 2 times the 3-bet, and by the time you reach the 5-bet the numbers have blown past half your stack, which is exactly why it turns into a shove. For the general logic behind these jumps, see our bet sizing guide.
Why a 5-Bet Is Almost Always All-In
Look at the ladder again. After the 4-bet to $42, there is already roughly $60 in the pot. You put in $18 with your 3-bet, so you have about $182 behind. If you make a “small” 5-bet to, say, $95, you have committed nearly half your stack and left yourself only about $105 behind into a pot that is now enormous. You can't fold to a shove at that point without lighting money on fire, so the small 5-bet gains you nothing over just jamming.
That's the whole reason a 100bb 5-bet is a jam: the stack-to-pot ratio has collapsed. There is no room left to maneuver, so you either put it all in or you fold. Non-all-in 5-bets only start to make sense when stacks are much deeper (150bb or 200bb), and even then they are mostly a high-stakes tool. At the stakes almost everyone plays, treat a 5-bet as a shove and your life gets much simpler.
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What Hands Do You 5-Bet?
Because a 5-bet is a shove, the range is tiny and polarized: your very best hands for value, and a few blocker hands as bluffs, with nothing in between. Middling strong hands do not jam, because they are too good to fold cheaply but crushed by the range that calls a shove. Here is the shape of it at 100bb:
The bluff hands are the interesting part. A5s and A4s are not random: they hold an ace blocker, which removes combinations of AA and AK from the hands your opponent can have, making it a little less likely they hold a monster. They also make the nut flush and the wheel straight on the rare times you get called and see a flop. These are the same blocker bluffs we cover in the 4-bet guide, and if the notation like A5s is new to you, our hand notation guide decodes it.
Value and Bluffs: The Balance (and Why Low Stakes Breaks It)
In theory you want both halves of that range, so a thinking opponent can never be sure whether your jam is AA or A5s. That balance is what makes the 5-bet unexploitable against strong players. It is also why a 5-bet is one of the sharpest tools in the game: the 3-bet opened the door, the 3-bet guide covers that rung, and the 5-bet slams it.
But here is the practical truth for most games. At low stakes, drop the bluffs. A 5-bet bluff only earns money when your opponent 4-bet with hands weak enough to fold to a shove. Low-stakes players almost never 4-bet bluff. When a $1/$2 regular 4-bets, they have QQ+ and AK, full stop. Jam A5s into that and you get called by a better hand every time, having folded out nothing. So keep your low-stakes 5-bets close to pure value: AA and KK, jammed, and go get paid.
What to Do When You Face a 5-Bet
Since a 5-bet is a jam, facing one is a clean call-or-fold decision. You already 4-bet, so your range is strong. Now you ask a single question: does my hand beat the range that just shoved on me?
- Call off with the very top: AA and KK for sure, and AKs or QQ depending on how aggressive the player is.
- Fold the rest of your 4-bet range, including your own 4-bet bluffs. They did their job by taking the pot uncontested most of the time; when they run into a 5-bet, let them go.
And the low-stakes adjustment matters even more on this side: over-fold to 5-bets. Because almost nobody down there is 5-bet bluffing, a 5-bet is a near-certain AA or KK. If you are holding QQ or AK and a tight player jams over your 4-bet, folding is often the right, disciplined lay-down, as painful as it feels.
Short Stacks Change Everything
Everything above assumes 100bb. When stacks get short, the ladder collapses even faster. At 40bb a 3-bet can already be most of your chips, and the 4-bet or 5-bet is just a formality on the way all-in. Under about 20bb, the whole raising war disappears into a single push-or-folddecision preflop, where you either shove or fold and the 3-bet/4-bet/5-bet layers stop existing.
That short-stack world has its own math, and it is worth knowing cold for tournaments. Our push or fold chart shows exactly which hands to jam by position and stack size once you are in shove territory.
Common 5-Bet Mistakes
- Bluff 5-betting where nobody folds. The number one leak. Against a player who only 4-bets QQ+ and AK, your A5s jam is lighting money on fire.
- 5-betting QQ or AK for thin value into a nit. If a tight player 4-bets and you jam AK, you are often flipping at best and dominated at worst. Against nits, these hands call or fold, they do not jam.
- Making a small, non-committing 5-bet at 100bb. It commits you anyway, so it just gives a savvy opponent information and a cheaper price. Jam or do not 5-bet at all.
- Refusing to fold to a 5-bet. Calling off QQ or AK against a tight player's shove because you “already have so much in” is the sunk-cost trap. The chips in the pot aren't yours anymore.
Common Questions About 5-Bets
What is a 5-bet in poker? It is the third reraise preflop: open, 3-bet, 4-bet, 5-bet. At 100bb it is almost always all-in because the pot is already big enough to commit your stack.
Is a 5-bet always all-in? At 100bb, effectively yes. With 150bb or deeper a non-all-in 5-bet becomes possible, but it is rare and mostly a high-stakes play.
What hands do you 5-bet? For value, mainly AA and KK (plus QQ or AKs against aggressive opponents). For bluffs, ace-blocker hands like A5s and A4s. At low stakes, keep it almost pure value.
Should you 5-bet bluff at low stakes? Usually no. Low-stakes players rarely 4-bet bluff, so a 5-bet bluff folds out nothing and gets called only by better. Save it for tougher games.
What should you do when facing a 5-bet? It is almost always a jam, so call off with the top of your range (AA, KK, sometimes AKs or QQ) and fold the rest. At low stakes, over-fold, because a 5-bet there is almost never a bluff.
Putting It Into Practice
The 5-bet is the last rung of a ladder you now understand top to bottom: the open, the 3-bet, the 4-bet, and the jam that ends it. You don't need to use it often. You need to recognize the spot, know your two or three value hands, and have the discipline to fold when a tight player fires the final shell back at you.
The fastest way to build that instinct is repetition. Drilling these preflop wars until the right answer is automatic beats memorizing a chart you will freeze on at the table, which is exactly what the trainer below is for.
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