An overlay happens when the guaranteed prize pool (GTD) is bigger than what the buy-ins collected can cover. GGPoker publishes a GTD number on every major tournament, and the site eats the difference if the field doesn't fill it. That difference is extra money split among whoever showed up, on top of what their own buy-ins funded.
On GGPoker this shows up most often in three spots. Multi-flight events (Day 1A, Day 1B, Day 1C feeding one Day 2) sometimes have a GTD sized for combined flight attendance that doesn't fully materialize on a slower flight. Late-night or off-peak GTD tournaments run on a schedule built for global traffic, so a flight that lands in a quiet timezone window can come up short of its target field. And satellites, especially the ones feeding WSOP or other GGPoker-branded series, frequently guarantee a fixed number of seats regardless of how many entries actually register.
You can see the overlay forming in the lobby itself. Open a tournament's info panel and you'll see "Total Buy-in" (entries times buy-in) next to "Guarantee." When entries are tracking below what's needed to clear the guarantee as the clock runs down, that gap is real, spendable overlay for the field that's already in.
GGPoker runs a heavier tournament schedule than most competitors, with large daily and weekly GTD series layered on top of recurring specialty formats (Bounty Hunters PKOs, Bubble Rush hyper-turbos, and satellite ladders into bigger series). More scheduled GTD volume means more chances for a specific flight or specific buy-in tier to miss its number, particularly midweek or in lower buy-in brackets where the recreational player pool is thinner relative to the guarantee size.
That volume is also why manually tracking overlay on GGPoker alone is a real time sink. On a busy day the lobby can show 40 or more GTD tournaments running or about to start, each with its own entry pace and its own late reg window closing at a different time.
Late reg on GGPoker typically stays open through a set number of levels, often somewhere in the range of the first hour to 90 minutes depending on the tournament's structure, and longer for slower structures and some special series events. Every minute you wait to register is a minute you're not paying blinds, and (per GTO Wizard's ICM analysis) a minute the field ahead of you is bleeding stacks into the prize pool math.
GTO Wizard modeled the ICM effect of entering late across formats. The results aren't uniform, and the format you're registering into matters more than the general "late reg is good" advice suggests:
| Format | ICM effect of a late-registered seat | What it means on GGPoker |
|---|---|---|
| Standard MTT (freezeout) | About 10.9% more seat equity than the buy-in | Late reg into GGPoker's standard GTD events is a real equity edge, not just a scheduling convenience |
| Satellite (flat payout) | About 29.76% more seat equity than the buy-in | Late reg into GGPoker satellite ladders compounds this further |
| PKO (Bounty Hunters, etc.) | A late starting stack loses about 14% of its value | Late reg into GGPoker's bounty formats works against you |
Source for the MTT and satellite figures: GTO Wizard's ICM analysis of late registration. Source for the PKO figure: GTO Wizard's study on the hidden cost of late reg in PKOs. These are ICM seat-equity numbers, not ROI figures, so treat them as a measure of how much your seat is worth relative to buy-in, not a promised return.
The practical takeaway for GGPoker specifically: in a standard freezeout GTD, waiting for late reg gives you both the ICM seat-equity bump and a longer look at whether the tournament is tracking toward an overlay. In a Bounty Hunters PKO, that same wait costs you bounty equity you can never recover, since bounties on eliminated players start accruing from hand one. For a deeper breakdown of the math behind these numbers, see Late Registration Poker EV: The Actual Math Behind Entering Late and Is Late Registration Worth It in Poker? The Math, Format by Format.
Mystery bounty tournaments on GGPoker are the one bounty-adjacent format where late reg doesn't carry the PKO penalty, because the bounty envelopes don't unlock until Day 2. You aren't giving up bounty equity by waiting, since there's no bounty equity in play yet during Day 1 late reg. Satellites behave the opposite way: GTO Wizard's 29.76% figure means a satellite seat gets more valuable the later you take it, since the field ahead of you has already thinned the shorter stacks that feed ICM pressure on the remaining seats.
The lobby math (entries times buy-in versus guarantee) is public information, but checking it manually across every GGPoker GTD tournament, plus all the other networks Profitmaxxer tracks, isn't something one person can do in real time. Scrolling lobbies while multi-tabling means you catch the overlays you happen to look at, not the ones that formed while you were three tables deep in a different session.
This is the specific gap Profitmaxxer's scanner is built to close. It checks GGPoker's lobby (and 11 other networks) every 30 seconds, comparing live entries against guarantees, and pushes a Telegram alert the moment a tournament's overlay percentage crosses your filter threshold. As of this writing the scanner has logged more than $48.5M in total overlay across 194 days of continuous scanning, with over 15,000 separate overlay instances flagged on GGPoker alone. The same scan also tracks Max Late Reg windows, so you get a countdown on exact minutes remaining before registration closes on any tournament you're filtered into, and a separate PKO pre-registration alert that fires before a Bounty Hunters event starts rather than during its late reg window, matching the ICM math above.
For a manual walkthrough of what to check in the lobby yourself before reaching for automation, see How to Find Poker Tournament Overlays (Step by Step). And if you want to see how big single-tournament overlays can get across networks, Biggest Poker Tournament Overlays: The Real Numbers has the actual dollar figures from tournaments the scanner has caught.
GGPoker's tournament volume makes it one of the more consistent sources of overlay simply because there are more scheduled GTD events for the field to under-fill. The ICM math on late registration cuts both ways depending on format: real seat-equity gains in standard MTTs and satellites, a real cost in PKOs. Knowing which bucket a given GGPoker tournament falls into, and knowing before late reg closes whether it's tracking toward an overlay, is the difference between guessing and playing the number. For more on timing this across your whole session rather than one tournament at a time, see Best Time to Late Register Poker Tournaments: A Data-Backed Guide.
Max Late Reg alerts you when it is time to register for profitable tournaments. Set your preferences once, get pinged when the math says go.
Try Max Late Reg on Telegram