A 4-bet is the third raise in a betting sequence,when someone opens, gets 3-bet, and then re-raises again. It’s poker’s way of saying “I’m not backing down” with maximum pressure.
In modern poker, a 4-bet typically represents one of two things: a premium hand looking to build a massive pot, or a calculated bluff targeting specific opponents who 3-bet too frequently. The standard 4-bet sizing ranges from 2.2x to 2.5x the 3-bet amount when in position, and slightly larger out of position. Most 4-bets happen preflop, creating pots that often lead to all-in decisions by the flop.
The power of the 4-bet lies in its ability to define ranges and create fold equity. When you 4-bet, you’re essentially telling your opponent that you’re willing to play for stacks, forcing them to make a critical decision with most of their range.
How Does 4-Bet Work?
Example 1: Value 4-Bet
You hold A♠A♥ on the button.
The cutoff opens to $6, you 3-bet to $18, the cutoff 4-bets to $48, you 5-bet all-in.
Your pocket aces welcome the aggression, and you’re happy to play for stacks against their likely QQ+ and AK range.
When Should You 4-Bet?
- Against opponents who 3-bet frequently (over 8% from the blinds)
- When holding premium hands like AA, KK, and AK
Common Mistakes with 4-Bet
4-betting too small. A 4-bet to only 2x the 3-bet gives your opponent great odds to continue with their entire 3-betting range, defeating the purpose of the 4-bet.
Key Takeaway
A 4-bet is a powerful weapon that should be used selectively. Focus on 4-betting for value with your strongest hands and occasionally as a bluff against opponents who 3-bet too liberally. Size your 4-bets large enough to generate fold equity,typically 2.2-2.5x the 3-bet amount.
Pro Tip: When 4-bet bluffing, use hands with blockers like A5s or A4s. These hands block your opponent’s AA and AK combinations, making it more likely they’ll fold.
