Preflop 3-Betting — The Re-Raise That Transforms Your Game
The 3-bet is the single most impactful preflop weapon you can add to your arsenal. It wins pots without seeing a flop, takes the initiative in hands you play, and balances your range so opponents can't predict your holdings. This guide covers value 3-bets, light 3-bets, position-based ranges, sizing, and defending against 3-bets.
What Is a 3-Bet?
In the preflop betting round, the sequence goes: (1) blinds are posted (first bet), (2) a player raises (second bet / open), (3) another player re-raises (third bet / 3-bet). The 3-bet is a re-raise of the initial open raise.
Example: Blinds are $1/$2. Player A raises to $6. You look down at Q♠ Q♣ and re-raise to $18. Your $18 raise is a 3-bet. Player A now has to decide: call $18, 4-bet (re-raise again), or fold.
Why is it called a “3-bet” and not a “re-raise”? The terminology comes from fixed-limit poker where the blinds were considered the first bet, the raise was the second, and the re-raise was the third. The name stuck even in no-limit.
Value 3-Bets vs Light 3-Bets
Value 3-bet: You have a premium hand (QQ+, AK) and you want to build the pot because you believe you have the best hand. This is straightforward — you have the goods, you raise for value.
Light 3-bet (bluff 3-bet): You have a hand that isn't premium but has good properties for 3-betting: suited aces (A5s, A4s), suited connectors (76s, 87s), or suited kings (K5s). You 3-bet not because your hand is the best, but because: (1) your opponent will fold a lot of their opening range, (2) you take initiative for the rest of the hand, (3) your hand has playability post-flop (suitedness, connectedness, blocker value).
Why light 3-bet? If you only 3-bet with AA/KK/AK, good opponents will fold to every 3-bet and you'll never get paid. Light 3-bets balance your range — opponents can't tell if your 3-bet is aces or five-four suited, so they have to respect it every time.
3-Bet Ranges by Position
Button vs CO open
~8-10% of handsWidest 3-bet range — you have position post-flop. Light 3-bets with suited Aces and low suited connectors add balance.
CO vs MP open
~6-8%Tighter than BTN — you're out of position against some callers. Focus on value with selective light 3-bets.
SB vs BTN open
~9-12%Wide 3-bet range because you're out of position — 3-betting reclaims initiative. Calling from SB creates difficult post-flop spots.
BB vs SB open
~12-15%Widest 3-bet range in poker. SB opens wide, BB 3-bets wide. Battle of the blinds is the most aggressive spot in the game.
UTG vs EP open
~3-4%Very tight. EP opens are strong. Only 3-bet premium hands and the occasional suited Ace for balance.
3-Bet Sizing
Sizing your 3-bet correctly is crucial. Too small and your opponent always calls (defeating the purpose). Too large and you risk too much when they have a premium hand.
Defending Against 3-Bets
When you open-raise and face a 3-bet, you have three options:
4-bet: Re-raise with your strongest hands (AA, KK) and occasional bluffs (A5s, A4s). A 4-bet should be 2-2.5× the 3-bet size. This polarized range (nutted hands + bluffs) is the standard approach.
Call: With hands too good to fold but not strong enough to 4-bet: JJ, TT, AQs, KQs, AJs. These hands play well post-flop and have equity against the 3-bettor's range. Calling keeps the pot manageable.
Fold: Everything else. Hands like K9o, J8s, Q7s that you opened but can't profitably continue against a 3-bet. This is the correct play most of the time — folding to a 3-bet isn't weak, it's disciplined.