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ICM with a flat payout structure

Small jumps between places: chips lose value.

Updated 2026-10-02 · exact Malmuth-Harville ICM

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This page works through a flat structure where the top prize is only about three times the last one. The numbers are exact results of the ICM model (the probability of finishing first is proportional to the stack, then the same rule for the next place), not estimates.

The payouts

Share of the prize pool by finishing place:

1st2nd3rd4th5th6th7th8th9th
20%16%13%11%10%9%8%7%6%

Equity of every stack

Example stacks, total 13000 chips:

SeatChipsShare of chipsICM equityEquity minus chip share (points)
1300023.1%14%-9.1
2250019.2%13.3%-5.9
3200015.4%12.6%-2.8
4160012.3%11.9%-0.4
5130010%11.2%+1.2
610007.7%10.5%+2.8
78006.2%9.9%+3.7
85003.8%8.8%+4.9
93002.3%7.8%+5.5

The biggest stack is worth 14% of the prize pool while holding 23.1% of the chips. The smallest stack is worth 7.8% and holds 2.3%.

Bubble factors

Bubble factor of the row player when all-in against the column player, for the first 5 seats:

Hero \ VillainSeat 1Seat 2Seat 3Seat 4Seat 5
Seat 1 (3000)—1.991.611.411.30
Seat 2 (2500)2.77—1.851.541.38
Seat 3 (2000)2.652.58—1.791.52
Seat 4 (1600)2.512.452.38—1.75
Seat 5 (1300)2.392.342.282.22—

Across all pairs the highest bubble factor in this example is 2.77 (seat 2 with 2500 chips all-in against seat 1 with 3000), and the lowest is 1.06 (seat 1 against seat 9). A seat with bubble factor 2.77 needs about 73% equity to call an all-in that offers even odds.

What it means for your play

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progressGTO guides use our own solution book (v13, 8-max tournaments with ante, chip EV): an approximation of equilibrium with a modelled postflop, not an exact solution. Numbers are computed from the book and from the exact ICM model.

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