The Sunk Cost Fallacy: Why Poker Players Fold and You Should Too

The sunk cost fallacy is letting money, time, or effort you've already spent drive a decision that should be about the future. Poker teaches the cure better than almost anything, because folding a hand you've already invested in is a daily, money-on-the-line exercise in ignoring sunk costs.

The poker version

You raise, you bet the flop, you barrel the turn — and the river brings a card that means you're beaten. A losing player thinks, "I've already put so much in, I can't fold now." But the chips in the pot aren't yours anymore; they're the pot's. The only question is whether calling the river is profitable going forward. The money already in is irrelevant to that decision.

Why it's so hard

Humans hate "wasting" what they've spent, so we keep investing to justify past investment — pouring more into a failing project, a bad relationship, a sinking position — precisely because we've already put so much in. That instinct feels like commitment; it's actually a trap that turns one loss into a bigger one.

The fix: only the future counts

Good poker players make decisions based on what happens from here — expected value going forward — not on what's already in the pot. Every decision is fresh: given the current situation and the future, what's the best move? What you've already lost is information at most, never an obligation.

Applying it off the table

Ask of any ongoing commitment: "Knowing what I know now, if I weren't already in this, would I start it today?" If the honest answer is no, the past investment isn't a reason to continue — it's the trap keeping you there.

The takeaway

Sunk costs are gone; only future value should drive decisions. Poker trains this with every fold: the chips in the pot aren't yours, and the only question that matters is what's profitable from here.