What is ICM in poker?
ICM — the Independent Chip Model — converts tournament chip stacks into shares of the prize pool, and shows that because payouts are top-heavy, chips you might lose are worth more than the chips you might win.
Why it matters
In a cash game a chip is a chip. In a tournament, doubling your stack less than doubles your prize equity, and busting loses all of it — so every all-in risks more value than it offers. This asymmetry is why correct tournament play diverges hardest from cash play exactly when the money gets close.
The practical asymmetry: shoving stays strong under ICM (your opponents are the ones taking the risky call), while calling all-ins tightens dramatically. Aggression gets cheaper; hero calls get more expensive.
The numbers
- Chip-EV baselines (like Nash push/fold charts) assume no ICM. Near a bubble or pay jump, calling ranges can tighten to a fraction of chip-EV, while wide shoving remains close to correct.
- ICM pressure is greatest on medium stacks with a ladder to protect, and smallest on the big stack — which is why big stacks attack bubbles and medium stacks fold queens.
Figures come from the same preflop charts and research data the rest of the site uses (charts last updated July 5, 2026); they change when that data does.
Simplified Nash open-shove ranges for 5–20bb from every position, written out as text.
Common questions
Does ICM change push/fold charts?
It mostly changes CALLING ranges, which tighten a lot near pay jumps. Open-shove ranges tighten somewhat for medium stacks, but the chip-EV chart remains the right starting point — tighten from it under pressure, don't loosen.
Why would anyone fold QQ under ICM?
Because a call that's +chips can be −money: winning the flip grows your prize equity less than losing it shrinks it. On extreme bubbles even KK can be a fold facing a shove that has you covered.
Is this your leak?
Seven real hands, four minutes. The quiz finds the one pattern costing you the most — free, no signup.
Find my leak →