An overbet is a bet larger than the size of the pot. It’s used with a polarized range on boards where you hold the nut advantage and the opponent’s range is capped at medium-strength hands.
Overbetting maximizes value and fold equity when the situation is right. Because it risks more than the pot, it demands a credible top of range — nut hands plus bluffs — so it must be polarized and backed by a nut advantage. Without those, a large bet is easy to bluff-catch and re-raise.
Great overbet spots are cards and runouts that hit your range hard and miss the opponent’s: an ace turning on a board you can hold two-pair-plus, or a river that completes your value while the opponent is capped. Applied correctly, overbets extract stacks that a pot-sized bet would leave on the table.
When you face an overbet, most of your range folds — that is correct, not weak. Against 1.5 times the pot you need 38% and MDF is 40%, and the share that continues is made of hands strong enough to beat his value plus the best few bluff-catchers chosen by blockers. Two opposite mistakes are common: calling overbets with any pair ‘because he could be bluffing’, and folding everything including good top pair ‘because it is an overbet’. MDF says 40% continues: not zero, not everything. When villain overbets into your nuts, raise — calling wins only what he has already put in.
Worked example
FAQ
When should you overbet?
When you hold a nut advantage on a runout that favors your range and caps the opponent’s, using a polarized range of strong value plus bluffs.
Why do overbets need a nut advantage?
A bet larger than the pot risks a lot, so it needs the very top of the range to be credible. Without nut advantage it’s easy to bluff-catch and re-raise, turning it into a losing play.