The Sunday Million — online poker's longest-running weekly tournament — turns 20 this year, and PokerStars is marking the milestone with a $5,000,000 guaranteed anniversary edition. The buy-in stays at the familiar $109, but almost everything else about this edition is different from the tournament that has run every Sunday since 2006.
The anniversary event is a Progressive Knockout, and for the first time in Sunday Million history it uses a phased format. Phase 1 flights have been running daily since June 28 and continue through September 6. Phase 2 begins on September 6, with the champion crowned on September 7.
The Numbers Behind the $5 Million Guarantee
To cover a $5 million guarantee at a $109 buy-in, PokerStars needs roughly 50,000 entries. That is a serious ask even for the largest online poker room in the world, which is precisely why the phased structure exists.
A conventional single-day Sunday Million caps out at whatever players can be convinced to sit down on one specific Sunday afternoon. A phased tournament removes that constraint entirely. Players can fire a Phase 1 flight on a Tuesday morning, a Thursday evening, or any of dozens of windows spread across a ten-week runway. Survive with a stack and you carry it into Phase 2.
The result is a tournament that accumulates its field over two and a half months instead of four hours. It is the same logic that live festivals have used for years with multi-flight Day 1s, and it is the only realistic way to build a five-figure field at this buy-in level.
Why Progressive Knockout Changes the Strategy
The anniversary edition is a PKO, which materially changes correct play compared to a standard freezeout Sunday Million. In a progressive knockout, part of every buy-in goes into a bounty on your own head. Eliminate a player and you collect half their bounty in cash while the other half is added to yours.
The practical consequence is that calling ranges widen substantially. When an opponent shoves for 12 big blinds and there is a meaningful bounty attached, the immediate cash value of eliminating them adds to your pot odds. Hands you would fold in a freezeout become clear calls. This is the single most common leak among players moving from freezeouts to PKOs — they apply freezeout ranges to a format where the maths has changed underneath them.
The effect compounds. Big stacks have the most incentive to call, because they cover more players and therefore have the most bounty-collection equity. That means short stacks shoving into large stacks get looked up far more often than they expect. Understanding pot odds and equity is foundational here, and our poker odds guide covers the calculations you need to make these decisions at speed.
There is also an ICM wrinkle. Standard ICM tells you to tighten as pay jumps steepen. Bounty equity pushes in the opposite direction. The two forces do not cancel out neatly — they interact in ways that depend on stack distribution and bounty sizes — and getting the balance right at a PKO final table is genuinely one of the harder problems in tournament poker.
Twenty Years of the Sunday Million
When the Sunday Million launched in 2006, a $1 million guaranteed online tournament at a $215 buy-in was a genuinely radical proposition. Online poker was in the middle of the post-Moneymaker boom, but nothing on that scale ran weekly. It became the fixed point of the online tournament calendar — the tournament every recreational player knew by name and every grinder built their Sunday schedule around.
It survived the Black Friday contraction in 2011, the ring-fencing of European markets, the shift from desktop to mobile, and the arrival of GGPoker as a genuine rival for the largest-room title. The buy-in dropped from $215 to $109 in 2017, roughly doubling accessibility. The guarantee has been raised and lowered over the years in response to traffic, but the tournament itself has never missed a Sunday.
Twenty years of unbroken weekly operation makes it one of the most durable products in the history of online gambling. There are very few consumer products of any kind that have run continuously on the same weekly schedule for two decades.
What This Means for Players
If you are planning to play, the phased format is the key thing to get right. You do not need to be available on a particular Sunday. You need to find a Phase 1 flight that suits your schedule and play it properly — which, in a phased tournament, means playing for a big stack rather than for survival.
This is a point worth dwelling on. In a phased event, all surviving stacks from all Phase 1 flights merge into Phase 2. A player who limps through with 15 big blinds has a small fraction of the equity of a player who arrives with 100. Because Phase 1 flights typically end with a relatively deep average stack, the correct approach is aggressive accumulation. Nursing a short stack to the end of a flight is close to the worst outcome available short of busting.
Multiple entries across different flights are permitted in most phased formats, which introduces a bankroll question. Firing four $109 bullets is a $436 commitment. Our bankroll management guide covers how to size that against your total roll, and the tournaments page has more on structuring a series schedule.
For players who cannot access PokerStars, the same PKO format is now standard across the industry. Rooms including Americas Cardroom and BetOnline run progressive knockout tournaments regularly, and the strategic principles transfer directly.
The Broader Context: PokerStars' Big Autumn
The Sunday Million anniversary is not a standalone event. It funnels directly into PokerStars' biggest quarter of the year. The 25th edition of WCOOP runs September 6–30, which means the Sunday Million Phase 2 finale lands on the opening day of the series. That is not a coincidence — it is a deliberate attempt to create a single high-traffic moment that launches the autumn schedule.
PokerStars is also in the middle of the largest structural change to its network in years, consolidating Flutter's UK poker brands onto the PokerStars Network to pool liquidity. A $5 million flagship tournament is exactly the kind of headline product that makes a bigger network worth building.
Bottom Line
A $109 buy-in with a $5 million guarantee, a ten-week phased entry window, and a progressive knockout structure. The value depends heavily on whether PokerStars hits 50,000 entries — fall short and there is overlay, which is straightforwardly good for everyone who entered.
The strategic requirement is to treat Phase 1 as an accumulation problem rather than a survival problem, and to correctly widen your calling ranges for the bounty component. Get both right and this is one of the better-value large-field tournaments of the year. For more on tournament fundamentals, see our poker strategy hub and the poker odds calculator.