3-Bet Basics: When to Re-Raise Before the Flop

A 3-bet is a re-raise before the flop, after someone has already raised. It is one of the most powerful plays in poker, because it can win the pot immediately or build a big pot when you have a strong hand. It is also an easy way for beginners to lose a lot of chips, so it pays to know when to use it.

The short version

• Beginners should 3-bet mostly for value: premium hands like QQ+ and AK.
• Add bluff 3-bets only against players who fold a lot, and with hands that have some playability (suited aces, for example).
• Use a larger size when you are out of position.
• When you are 3-bet yourself, folding is often right. Do not call out of position with a marginal hand.

Why it is called a 3-bet

The blinds count as the first bet, the opening raise is the second bet (a "2-bet"), and the re-raise is the third bet. A re-raise of a 3-bet is a 4-bet, then a 5-bet, and so on.

Why 3-bet?

• For value: you hold a strong hand and want to build the pot against weaker hands that will call.
• To get fold equity: the opener may fold and give you the pot.
• To take initiative: as the last aggressor, you can bet first after the flop and often win with a continuation bet.
• To isolate: against one weak player you can 3-bet to play heads-up in a good spot.

Value first

A beginner's 3-betting range should be small and strong:

• QQ, KK, AA, AK are almost always 3-bets.
• JJ and AQs are close: 3-bet against loose openers, call or fold against tight ones.
• The better your position and the weaker the opener, the more hands you can 3-bet.

Size so that weaker hands fold or pay a high price. If the opponent opens to 3 big blinds, a normal 3-bet in position is about 9 big blinds (3 times the open). Out of position make it larger, about 10–12 big blinds (4 times the open), because you will be out of position for the rest of the hand.

Light 3-bets: bluffing before the flop

A bluff 3-bet is a re-raise with a hand that is not strong enough to want a big pot, such as A5s. The goal is to win the pot right away or get lucky when called.

The maths: if the open is 3 big blinds, the pot is 4.5 big blinds (blinds plus the open). A 3-bet to 9 big blinds risks 9 to win 4.5. If you have no equity when called, you need the opponent to fold 9 ÷ (9 + 4.5) = 67% of the time. Hands with some equity (suited aces, suited connectors) and position need fewer folds, which is why they are the best bluffs.

Good candidates for bluff 3-bets:

• Suited aces (A5s–A2s): they hold the ace that the opponent may need for A-A or A-K, and they can make a flush.
• Suited connectors such as 76s or 87s, in position.

Do not bluff 3-bet against "calling stations" who rarely fold, and do not bluff with hands like K9o that are bad when called. See bluffing.

Position matters

In position you can 3-bet a wider range because you will act last after the flop. Out of position, keep the range tighter and more value-oriented. See position. Also remember that the blinds are the usual 3-bettors, so respect an early-position raiser who has a strong range.

When someone 3-bets you

• Fold most of your marginal hands. A 3-bet usually represents a strong range, and calling out of position leads to hard decisions.
• Call with hands that play well after the flop in position: strong pairs, AQs and suited broadway hands.
• 4-bet with the strongest hands (AA, KK, AK) and occasionally as a bluff with a hand like A5s.

A 3-bet from a player you have seen 3-bet often can be a bluff. Against such players, call more or 4-bet more often. Against a tight player, believe the 3-bet.

Example

A player raises from the cutoff to 3 big blinds. You are on the button with Q♥ Q♠. You 3-bet to 9 big blinds. The cutoff calls. The flop comes 9♣ 5♦ 2♠. You have an overpair, and you are the last aggressor, so you bet. If the opponent folds you win the pot; if they call you keep building a pot with a strong hand.

With A♥ 5♥ in the same spot, you could also 3-bet as a bluff: you block the ace, can make a flush and win immediately when the cutoff folds.

Common leaks

• 3-betting too wide in position and too thin out of position.
• Using the same size every time regardless of position and stack depth.
• Never folding to a 4-bet with weak bluffs.
• Bluffing against opponents who never fold.
• Calling 3-bets out of position with marginal hands.

What to read next

• Starting hands: which hands to raise.
• Position: why the seat decides your range.
• Bluffing: the maths of when a bluff pays.
• GTO vs exploitative play: adjusting to the opponent.
• Preflop range charts: which hands to open from each seat.