PKO stands for progressive knockout, a tournament format where part of every buy-in becomes a bounty on that player's head, and your own bounty grows each time you eliminate someone. The format also changes late registration: GTO Wizard's ICM analysis found that a late starting stack in a PKO loses about 14% of its value, which is the opposite of a standard MTT (source: GTO Wizard, The Hidden Cost of Late Reg in PKOs). So knowing what PKO means matters for more than vocabulary, because it decides when you should sit down.
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Every entrant's buy-in is split into two parts. One part goes into the regular prize pool, which pays by finishing position. The other part becomes the player's bounty. A common structure is an even split, so a $20 PKO puts $10 toward the prize pool and $10 on your head. The exact split varies by operator and by tournament, so check the lobby description.
When you knock a player out, you collect cash for their bounty. In the typical structure you receive half of it immediately, and the other half is added to your own bounty. Here is an example with a $10 starting bounty:
The next player to knock you out collects half of $15, and so on. Bounties snowball, which is why a deep run in a PKO pays from two places: the knockouts along the way and the finishing position.
| Format | How the bounty works | Late reg takeaway |
|---|---|---|
| Standard knockout (KO) | Fixed bounty on each player, paid in full when you eliminate them | Bounty value stays flat, so it matters less as the field shrinks |
| Progressive knockout (PKO) | Half the bounty is paid in cash, half is added to your own bounty, so bounties keep growing | A late starting stack loses about 14% of its value per GTO Wizard |
| Mystery bounty | Bounty sizes are hidden and random until won | Treated as its own format with its own strategy |
| Jackpot PKO | Progressive knockout with randomized bounties at the moment they are won (called Ocean KO on GGPoker and SKO on Winamax in some sources) | Check the structure before deciding on late reg |
Because bounties stay relevant all the way through a PKO, strategy guides note that calling ranges widen against large bounties. A call that is correct in a PKO can be a clear mistake in a standard or mystery bounty event, so adjust by format rather than carrying one strategy everywhere.
In a normal MTT, registering late is usually good. GTO Wizard's ICM study of late registration found that a late entrant's seat is worth about 10.9% more than the buy-in in a standard MTT and about 29.76% more in a flat-paying satellite (source: GTO Wizard, The ICM Benefits of Late Registration). These are ICM seat-equity gains, not ROI figures. The reason is that you skip the early hands, you start with a stack that is already short relative to the average, and some of the field has already busted before you act.
PKOs are the exception. Bounties are only collected by eliminating players, and players who bust early take their bounties with them. A late starter misses that bounty-building phase, so the starting stack is worth about 14% less according to the second GTO Wizard study. Two practical consequences follow:
You do not need a solver to avoid the most common mistakes.
A bounty is extra money on top of the pot. The bigger the bounty relative to the chips you need to call, the lower the equity you need. The bounty on a short stack that you cover is worth chasing. The bounty on a stack that covers you is a risk to your own tournament life.
As you collect knockouts, your head becomes more valuable. Opponents will call you wider, so your value hands win more but your bluffs run into more resistance.
Chasing bounties with weak holdings costs real chips. The bounty only compensates you for the part of the pot you win when you eliminate the player.
Early in the tournament, bounties are small relative to stacks, so ordinary play dominates. In the middle stages, with larger bounties circulating, wider calls become correct more often.
Overlay happens when a tournament's guaranteed prize pool is larger than the buy-ins collected, so the operator adds the difference. Overlay in a PKO still matters, but the timing rule above applies: because late entrants are disadvantaged in the format, the useful alert is one that arrives before the tournament starts, while you can still register at the beginning.
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PKO stands for progressive knockout. It is a bounty tournament in which part of each buy-in funds a bounty, and when you eliminate a player, you win part of their bounty in cash while the rest is added to your own bounty.
In the typical structure, you collect half of the eliminated player's bounty in cash and the other half is added to your own. Some operators and special formats use different splits, so read the tournament's rules in the lobby before you register.
Usually not. GTO Wizard's analysis found that a late starting stack in a PKO loses about 14% of its value, because late entrants miss the early phase in which bounties are built. This contrasts with a standard MTT, where a late seat is worth about 10.9% more than the buy-in in ICM terms.
In a PKO, bounties are visible and grow progressively as you collect knockouts. In a mystery bounty tournament, bounty sizes are hidden and random until you win them. Strategy guides treat them as separate formats because the correct adjustments differ.
They can be, because the rules are easy to learn and knockouts give you a second source of winnings. The main risk is overvaluing bounties and calling too loosely, so start at low stakes and focus on the stack-covering and pricing points above.
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