A 3-bet in poker is a re-raise against an initial raise, the third bet in a betting sequence where the blinds count as the first bet. It’s one of poker’s most powerful aggressive actions, typically representing significant strength or a well-timed bluff.
The 3-bet serves multiple strategic purposes in modern poker. When you 3-bet, you’re essentially saying your hand is strong enough to challenge an initial raiser’s range, forcing them to make a difficult decision with most of their holdings. The move accomplishes several goals: it builds bigger pots with premium hands, applies pressure to steal pots preflop, and helps you take control of the hand’s narrative.
Effective 3-betting requires understanding position, opponent tendencies, and proper sizing. In position, 3-bets typically range from 3x to 3.5x the initial raise, while out of position they’re often larger at 4x or more to discourage calls. The frequency of 3-betting varies dramatically based on position, a button 3-bet against a cutoff open might happen 8-12% of the time in balanced play, while a UTG vs UTG+1 3-bet might occur just 3-4% of the time with only the strongest holdings.
What Happens During a 3-Bet?
The 3-betting sequence follows a specific pattern. First, the blinds are posted (the first bet). Then a player makes an initial raise (the second bet). Finally, another player re-raises (the third bet, hence “3-bet”). After a 3-bet, the action returns to the original raiser who can fold, call, or make a 4-bet.
Here’s a typical scenario: In a $2/$5 game, the cutoff raises to $15. The button then 3-bets to $45. The blinds fold, and action returns to the cutoff who must now decide whether their hand is strong enough to continue against the button’s show of strength.
3-Bet vs Regular Raise: What’s the Difference?
A regular raise is the first voluntary bet increase in any betting round. A 3-bet specifically refers to a re-raise of that initial raise. The key distinction is that a 3-bet always happens after someone has already shown aggression by raising. This makes it a much stronger play that puts maximum pressure on opponents.
3-Bet Sizing Guidelines
| Position | vs Early Position Open | vs Late Position Open |
|---|---|---|
| In Position | 3x-3.5x | 2.75x-3.25x |
| Out of Position | 4x-4.5x | 3.5x-4x |
| Multiway Pot | Add 1x per caller | Add 1x per caller |
Common 3-Bet Ranges by Position
While exact ranges vary by game dynamics, typical 3-bet frequencies are:
- Button vs CO: 8-12% (wider, includes bluffs like A5s, K9s)
- Button vs EP: 4-6% (tighter, mostly value like TT+, AK)
- Big Blind vs Button: 10-14% (polarized: premiums + bluffs)
- UTG vs UTG+1: 3-4% (almost purely value: QQ+, AK)
Hear It at the Table
Key Takeaway
The 3-bet is poker’s preflop power play, a re-raise that forces difficult decisions and builds bigger pots. Understanding when to 3-bet for value versus as a bluff, and sizing your 3-bets appropriately based on position, separates winning players from those who only play their cards.
