Finding the Leaks in Your Poker Game (Start With This One)

Most lists of common poker leaks rank mistakes by how often they happen: tilt, playing too many hands, folding too much preflop. None of them tell you which leak actually costs the most money. Two independent breakdowns of low-stakes hand data point to the same answer: the most expensive poker leaks live on the river, in the exact moment you pay off a big bet because the villain "might be bluffing." Here is how that leak works, how to find it in your own hands, and which leaks are worth checking after it.

We are going to treat this as a review problem, not a live-play problem. Nothing here is meant to help you decide faster at the table. It is meant to help you see, after the session, exactly where the chips went.

What a poker leak actually is, and why bb/100 is the only honest yardstick

A poker leak is a repeated decision that loses you money over a large sample, not a single hand that went badly. The word only means something once you can attach a number to it: how many big blinds per 100 hands (bb/100) that specific decision costs you, on average, over time.

Capitol Casino's rundown of common poker leaks defines it almost the same way: a leak is a pattern, passive or aggressive, that makes your play predictable and therefore exploitable (capitol-casino.com). That framing is useful, but it stops one step short. A pattern that costs you 0.1 bb/100 and a pattern that costs you 3 bb/100 are both "leaks" by that definition, and treating them as equally urgent is itself a mistake.

What counts as a real poker leak, and what's just bad luck?

A real leak repeats across many hands with the same shape: same street, same bet size, same type of hand, same wrong call or wrong fold. Bad luck is a single outcome, no matter how painful. If you can only describe the mistake once, in one hand, it might just be variance. If you can find the same mistake ten times in your last thousand hands, it's a leak, and it has a price in big blinds.

Why the river is where the biggest poker leaks hide

The river is where the most money changes hands in a session, and it's also where players are most likely to let curiosity override the math. Two separate video breakdowns, one from Jirico Poker on the Spanish-language channel and a near-identical version on the Brazilian-Portuguese channel, independently name the same mistake as the single biggest leak in low-stakes poker: calling large river bets because "he might be bluffing" (Jirico Poker Español, Jirico Poker Brasil).

The fact that the same analysis surfaces independently in two different poker media markets is itself a signal. This isn't a niche complaint about one player pool. It's a pattern that repeats across languages, which usually means it repeats across stake levels too.

Why do low-stakes players underbluff the river?

At micro and low stakes, most opponents simply don't bluff the river often enough to make hero calls profitable. Both videos describe the same population read: when a passive player suddenly fires a pot-sized bet after checking the flop and turn, that bet is very rarely a bluff. GTO theory says you should defend a specific percentage of your range against river bets to stay unexploitable, but that math assumes your opponent bluffs at a GTO-consistent frequency. A player who doesn't know what GTO is can't be bluffing at a GTO frequency, so calling based on that theoretical percentage against a real low-stakes opponent is, in practice, giving money away.

Folding a good hand to a scary river line, without needing to see the bluff, is one of the more profitable habits a low-stakes player can build.

How to find this leak in your own hand history

You don't need a live read to catch this leak. You need your own hand history, filtered to one specific spot: hands where you called a river bet of 60% pot or larger and lost. That filter alone will tell you, in bb/100, exactly what this leak is costing you over your last few thousand hands.

Start by pulling every hand where you were the caller on the river against a bet size in that range, then split the results by two outcomes: you won the showdown or you lost it. If your win rate in those specific spots is well under the frequency the pot odds require to break even, you have your answer. A poker leak's real cost only becomes visible once you measure it this way, not by feeling.

What should you actually filter for in your hand history?

Filter for river bets sized at 60% of the pot or larger, where you were facing the bet rather than making it, and where the villain had been passive (checking or calling) on both the flop and the turn before that river bet. That specific sequence, quiet, quiet, then a big bet, is exactly the pattern both video breakdowns describe as the trap. If you review a full session with that filter in mind, the leak tends to show up within the first ten or fifteen hands you check.

Working out whether a call was correct in the first place comes down to pot odds arithmetic you can do in a few seconds: the size of the call divided by the size of the pot after the call tells you the win rate you need. If your actual results in those spots fall well short of that number, the leak is confirmed, not just suspected.

The other leaks worth checking once the river is under control

The river overcall is the most expensive leak in most breakdowns, but it isn't the only one, and older leak lists still hold up for the rest. Cardplayer Lifestyle's list of eight common poker leaks and Learn2Holdem's ranking of the top ten both cover ground the river-focused videos don't: tilt, preflop range discipline, and underaggression (cardplayerlifestyle.com, learn2holdem.com).

Where the two source types disagree is on priority. The generic top-ten lists rank leaks by how often they occur, not by what they actually cost. Learn2Holdem's own scoring illustrates the gap well: "not folding enough" scores 9/10 on frequency but only 7/10 on cost, while "not managing tilt well" scores just 2/10 on frequency but 8/10 on cost. A leak that happens rarely but costs a lot when it does deserves more attention than a leak that happens constantly but barely dents your win rate.

Which leaks are common but cheap, and which are rare but expensive?

The table below lines up frequency against cost using Learn2Holdem's own published scores, alongside the river-overcall leak this article opened with. Frequency and cost don't move together, which is exactly why a leak-priority list needs both numbers, not just one.

Read that table as a study order, not a checklist to fix in one sitting. Tilt management scores low on frequency but high on cost, which means a single bad session under tilt can undo weeks of solid, disciplined play. The river leak isn't in Learn2Holdem's ten-item list at all, which is itself the point: an older ranking built before solver-era analysis of river frequencies simply didn't have the data to catch it.

The honest verdict on hunting your own poker leaks

Reviewing for one leak at a time, with a number attached to it, beats memorizing ten generic categories you'll never actually check against your own hands. The river overcall is the strongest candidate to start with, because two independent sources point at it as the single most expensive habit at low stakes, and because it's the easiest one to filter for directly in a hand history.

Online poker volume keeps growing year over year according to market trackers like Statista, and more hands played per week simply means a leak that costs 2 bb/100 compounds faster than most players assume. Whether the next leak worth chasing is tilt, underaggression, or something specific to your own VPIP and PFR numbers, the method stays the same: filter your hands, attach a bb/100 figure, then fix the one that costs the most before moving to the next.