3-Betting: The Complete Guide to Reraising Preflop

Poker bets are numbered sequentially by the order they occur preflop. The blinds count as the first bet. An open raise is the second bet—the 2-bet. A reraise over that open is the third bet—the 3-bet. A reraise over the 3-bet is the 4-bet, and so on.

So when someone opens to 3x from the hijack and you come back over the top to 9x from the cutoff, you've 3-bet. Simple enough. But the strategic reason to do it is what separates winning players from the rest of the field.

These two motivations define the two types of 3-bets: value 3-bets, where you want to be called and play a big pot, and bluff 3-bets, where your primary goal is to collect the dead money with a fold. A strong preflop strategy deploys both, which keeps opponents from being able to exploit you with a simple "always call" or "always fold" response.

Value 3-betting is straightforward in concept: you reraise because you have a hand strong enough to want action. The goal is to build the pot while you're ahead and ideally get all the money in with a significant equity advantage.

The clearest value 3-bet hands are AA, KK, QQ, and AK. These holdings are ahead of virtually every calling range and benefit enormously from inflating the pot preflop. Pocket Jacks are typically a value 3-bet as well, though the case becomes more marginal against tight openers and from out of position.

The reason you want these hands in heads-up pots is simple: multiway pots reduce the relative strength of even premium pairs. Aces hold up far better against one opponent than against three. A 3-bet price out many of the speculative hands—suited connectors, small pairs—that can crack your big pairs for cheap on the right board.

A common mistake is to use identical 3-bet sizes regardless of position. If you always 3-bet to the same amount, you give position away for free. Adjust your sizing and you give yourself a built-in edge before the flop is even dealt.

If you only 3-bet your premiums, competent opponents will simply fold when you reraise and call you down when you flat—and they'll be right to do so. Bluff 3-bets balance your range and apply pressure that pure value ranges can't generate.

The best 3-bet bluff hands share two qualities: they have blocker valueand reasonable playability when called. The concept of blockers is central here. If you hold an Ace, you reduce the probability that your opponent holds AA or AK—the exact hands they'd be most likely to 4-bet you with. Holding a blocker to the opponent's strongest hands makes your bluff more likely to succeed.

To understand when a bluff 3-bet is profitable, consider fold equity. Suppose a player opens to 3bb and you 3-bet to 9bb. The pot before your 3-bet contains roughly 4.5bb (open + blinds). Your opponent must call 6bb more to win ~13.5bb, so they're getting about 2.25:1—meaning they need roughly 31% equity to call profitably with a speculative hand. Against a population that folds even 40% of the time to 3-bets, your A5s bluff shows an immediate profit before accounting for the times you flop a pair, flush draw, or straight draw and win at showdown.

Fold equity varies enormously by player type. Against a nit who opens 10% of hands and folds 60% to 3-bets, bluffing is highly lucrative. Against a loose-passive player who never folds preflop, abandon bluff 3-bets entirely and lean on your value range.

Sizing is the most underappreciated component of a 3-betting strategy. The same hand played with different sizing produces dramatically different outcomes. Get the math wrong and you either price in all the wrong hands or never get paid on your best holdings.

In position, a 3x multiplier of the open is generally correct. If the original raiser opened to 2.5bb, a 3-bet to 7.5–8bb builds a meaningful pot, charges speculative hands, and keeps the stack-to-pot ratio workable for postflop play. Larger isn't always better—if you 3-bet to 15bb in position, you'll only get action from hands that dominate you.

Out of position, size up to 3.5–4x. The positional disadvantage you carry into every postflop street is real, and a larger sizing compensates by building a pot where your equity edge matters more than informational advantage. It also makes it harder for the opener to profitably call with hands that will outplay you postflop.

Pot geometry matters beyond the preflop action. A standard 3-bet pot puts around 18–20bb in the middle by the time the flop is dealt. With 100bb stacks, the effective SPR (stack-to-pot ratio) on the flop will be roughly 4–5—a range where top pair top kicker is comfortably stackable and sets are nearly always played for stacks. Understand what SPR you're targeting and size accordingly.

Knowing when to skip the 3-bet is just as important as knowing when to pull the trigger. Overusing the 3-bet is a significant leak that turns a profitable tool into a chip-dumping habit.

Avoid 3-bet/fold spots. If you're going to 3-bet, you must be prepared to call a 4-bet—or at minimum have a plan for it. Bluff 3-betting with A5s is fine, but if a tight opponent who opens 8% of hands and 4-bets 3% of hands comes back over you, folding is correct. The problem arises when players 3-bet without thinking through the 4-bet scenario. Before you reraise, know your 4-bet calling threshold.

Cold 4-bet situations demand extreme caution. When there's already been a 3-bet before the action reaches you, the range of hands you should come in with cold (without having raised or called previously) narrows dramatically. Squeezing with a bluff in these spots tends to be a losing play against most player pools.

Multiway pots are another 3-bet trap. When multiple players have already called the open before the action reaches you, a 3-bet bluff loses most of its effectiveness. Each additional caller reduces the fold equity you need for a bluff to be profitable. Against two callers and an opener, you need all three players to fold—a tall order. In these spots, tighten your 3-bet range to strong value hands only, or simply flat call and look to exploit the weak ranges on favorable flops.

Finally, consider opponent tendencies. Against a player who never folds to 3-bets, bluffing is actively burning money. Against that player, shift your entire 3-bet range to value, widen your value threshold to include hands like TT and AQ, and let them pay you off repeatedly.