An overlay exists when a tournament's guaranteed prize pool is larger than the buy-ins collected to fund it. The site pays the difference. Upswing Poker's glossary gives the textbook case: a $2,000,000 guarantee with only $1,800,000 in buy-ins leaves a $200,000 overlay that the cardroom absorbs.
For a player, the useful part is what the overlay does to the prize pool per entry. While the field is still below the guarantee, your buy-in does not grow the prize pool, because the pool is already fixed at the guarantee. The same money is split across fewer entries than the buy-in level implies. Finding overlays is really a question of finding tournaments where that gap is large enough to matter.
You need three numbers: the guarantee (GTD), the prize-pool portion of the buy-in, and the current number of entries.
Break-even entries = GTD ÷ prize-pool portion of the buy-in
A $22 tournament is usually $20 of prize money plus a $2 fee. A $10,000 GTD at $20 per entry needs 500 entries to cover itself. Anything below 500 entries is an overlay, and the overlay in dollars is:
Overlay = GTD minus (entries × prize-pool portion)
Two details trip people up:
Here is the $10,000 GTD, $20 + $2 example. The "equal-skill share" is the guarantee divided by the entry count, which is what an average player in the field is worth on prize-pool terms before any skill edge.
| Entries | Buy-ins collected | Overlay | Equal-skill share of pool | Vs. $22 cost |
|---|---|---|---|---|
| 250 | $5,000 | $5,000 | $40.00 | +$18.00 |
| 350 | $7,000 | $3,000 | $28.57 | +$6.57 |
| 450 | $9,000 | $1,000 | $22.22 | +$0.22 |
| 500 | $10,000 | $0 | $20.00 | −$2.00 |
The break-even sits at about 454 entries, where the share of the pool equals the $22 you paid. That is the key insight for anyone learning how to find poker tournament overlays: the overlay has to be bigger than the fee you are paying before the entry is profitable on average. A $1,000 overlay looks attractive until you notice it only just offsets a 10% fee.
This table assumes equal skill and a flat share of the pool. Real payout structures are top-heavy, so it shows the average return per entry, not the outcome of any single run. An overlay improves your expected return. It does not remove variance.
While late registration is open, the overlay you calculate is a ceiling. Every entry still to come shrinks it. A tournament showing a $3,000 overlay with two hours of late reg left may finish near zero. The same tournament with ten minutes left is much closer to its final number, so your calculation is much more reliable.
| Format | What to change |
|---|---|
| Progressive knockout (PKO) or bounty | Only the prize-pool portion of each buy-in counts toward the guarantee. Confirm how the site defines the GTD. |
| Satellite | An overlay often shows up as extra seats or tickets awarded beyond what the buy-ins pay for. See how to win poker satellites consistently. |
| Mystery bounty | Check whether the guarantee covers the main prize pool only or the whole pool. |
| Re-entry events | Use total entries, not unique players. |
Overlay tells you whether the prize pool is undersized. Late registration timing tells you what a seat is worth at the moment you sit down. These are separate edges, and they can stack.
GTO Wizard's ICM analysis of late registration measures ICM seat equity, not ROI. In their standard payout worked example, a nine-player field with four players already eliminated, a late entrant's seat is worth about 10.9% more than the buy-in before a hand is played. In their flat-payout satellite example the gain is about 29.76%. Those are equity figures from worked examples, and your actual result still depends on how you play.
PKOs are the exception. GTO Wizard's analysis of late registration in PKOs finds that when late reg closes with roughly 30 to 35 percent of the field remaining, a late starting stack has lost about 14% of its value, because much of the bounty pool has already been paid out. In PKOs, an overlay is worth more when you register before the start than when you wait for the final minutes.
For the timing side, see the best time to late register and the actual math behind late registration EV.
The formula is simple. The workload is not. Overlays appear and disappear across many sites, each lobby has its own layout, and the useful window is often the last stretch of late registration. That is when you are also playing other tables.
Consider what a full manual sweep involves:
If you play several tournaments at once, that means a lobby check at exactly the moments when your attention is already committed.
This is the problem Profitmaxxer was built around. It scans 12 poker networks every 30 seconds and sends two kinds of Telegram alerts: overlay alerts when the guarantee exceeds the buy-ins collected, and Max Late Reg alerts with the minutes remaining before registration closes. Filters let you set your buy-in range, minimum overlay percentage and format preferences, and each alert shows the edge per entry.
As of September 22, 2026, the scanner's running totals are:
| Metric | Figure |
|---|---|
| Total overlay tracked | $47,452,739 |
| Days running | 191 |
| Overlay instances detected | 78,265 |
| Average per instance | about $606 (total ÷ instances) |
| Networks scanned | 12 |
The live numbers are on the public stats page. These are overlay amounts seen at scan time. As explained above, late entries can shrink a live overlay, so a detected overlay is not the same as a guaranteed profit. That is why the alerts pair overlay size with registration timing.
If you want to test it against your own play, there is a free trial at profitmaxxer.com. Run it for a few sessions, compare the alerts to what you would have found in the lobby by hand, and decide from your own data.
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