The number only means something if you pin down the bet
If you're trying to calculate casino hold percentage, the first thing to avoid is treating it as one universal number for a whole game, let alone a whole casino. Hold is tied to a specific wager under a specific rule set. Change the bet, the table rules, the wheel type, or the bonus terms attached to the play, and the maths can change with it.
At the game level, the clean relationship is this: house edge and RTP are complements for the same game or bet under the same rules. If a game returned R% in the long run, its hold or house edge would be 100% minus R%. That sounds simple, but it only stays true when you are comparing like with like. A baccarat tie bet is not the same proposition as a banker bet. A roulette bet on an American wheel is not the same proposition as the corresponding bet on a European wheel. Blackjack basic strategy also depends on the exact rule set in use.
So the reliable method is: identify the exact bet, identify the exact rules, then calculate hold from RTP or expected loss from house edge. If you skip that step, the answer looks neat but tells you very little.
The basic formula
House edge is the mathematical advantage the operator holds on a given game, expressed as a percentage of each wager. RTP is the theoretical percentage of total wagered money a game returns to players over a very large number of spins or hands. It is a long-run statistical average, not a per-session guarantee.
For the same bet under the same rule set:
hold percentage = house edge = 100% minus RTP
That lets you move between the two ways casinos and game suppliers often describe the same underlying maths. If a game returned R% as an example, the hold would be 100% minus R%. If the house edge were E% as an example, the RTP would be 100% minus E%.
You can also turn that percentage into expected loss in money terms with hypothetical inputs:
expected loss = total amount wagered × house edge
Suppose a player makes T units of total wagers on a bet with an edge of E%. The long-run expected loss is T × E%. If instead you know the RTP is R%, then the same idea is T × (100% minus R%).
This is expectation, not a prediction of what one session will look like. A player can finish above or below expectation in the short run because outcomes are random and volatility changes how results are distributed over time.
How to calculate hold from handle, drop, and win
The phrase hold percentage is also used in venue accounting, where people may mean the share of money retained from a measured pool of play. In that setting, you need to know what the denominator is. Different reports may use money bought in, money wagered, or another house accounting measure. If you compare two figures built on different denominators, the percentages are not interchangeable.
Here is the structural distinction that matters:
| Term | What it refers to | How it is used in a calculation |
|---|---|---|
| House edge | The built-in mathematical advantage on a specific bet | Used to estimate expected loss from total wagering volume |
| RTP | The long-run percentage of wagers returned on that same bet | Used as the complement of house edge under one rule set |
| Hold from wagering | The share of total amount wagered retained over time | Operator win divided by total amount wagered |
| Hold from buy-in or cash in | The share retained from money brought to the table or machine | Operator win divided by the chosen accounting intake figure |
If you are doing gambling maths, use total amount wagered. If you are reading an operator report or venue report, check exactly how that report defines hold. A player can wager the same bankroll many times through repeated bets, so hold on total wagers and hold on buy-in can look very different even during the same session.
As an example, suppose a player brings in B units, cycles those units through repeated betting until total wagers equal T units, and leaves with C units. Operator win would be B minus C for that session view. Hold on buy-in would be (B minus C) divided by B. Hold on wagering would be (B minus C) divided by T. Those are both valid calculations if labelled correctly, but they are not measuring the same thing.
Why short sessions rarely match the percentage on the game
This is the part many people misread. RTP is a theoretical percentage of total wagered money returned over a very large number of spins or hands. A single evening is not a very large number in statistical terms, and it may contain outcomes far above or far below the long-run average.
Volatility explains part of that gap. Volatility describes how payouts are distributed over time. High volatility means rarer but larger payouts; low volatility means more frequent but smaller ones. Volatility does not change RTP. Two games can have the same long-run return but feel completely different over a short session because one produces bigger swings.
So if you are calculating hold percentage for personal play, there are two different questions:
- What is the long-run expected rate of loss on this bet?
- What could a short session reasonably look like in practice?
The first comes from house edge or RTP. The second comes from variance around that expectation. You need both to understand why a player can win in the short run on a negative-expectation game, and why that does not contradict the built-in edge.
Game choice, bet choice, and rule choice all matter
Not all wagers inside one game carry the same edge. This is one reason broad statements like “the hold on roulette” or “the hold on baccarat” can be too vague to help.
| Game | What changes the hold calculation | What to check |
|---|---|---|
| Roulette | Wheel type changes the maths | Whether the wheel is European with 37 pockets and a single zero, or American with 38 and a double zero |
| Baccarat | Different bets carry different house edges | Whether the wager is on banker, player, or tie |
| Craps | Different bet types on the same table carry materially different edges | The exact wager, not just the game name |
| Blackjack | Rule set and player decisions affect expected loss | Deck count, dealer stand rules, and doubling and splitting rules, then the matching basic-strategy chart |
| Slots | RTP is set for the game, while volatility changes session shape | The game information panel and paytable for the title being played |
If you want to calculate hold correctly, never stop at the table name or machine category. Read the paytable, game rules, or information screen. For table games, posted layout text and rule cards matter. For slots, the game information panel matters. For blackjack, a basic-strategy chart only applies to the rule set it was built for.
Decisions per hour change your total exposure
A small edge applied to more wagers becomes more total expected loss. That is why speed matters. The house edge is a rate per wager, but your actual exposure over a session depends on how many decisions you make and how large each wager is.
The structural calculation is:
total amount wagered = average stake × number of decisions
And if you want a session-level expectation:
expected loss = average stake × number of decisions × house edge
Suppose, as an example, a player stakes S units per decision and makes N decisions. Total action is S × N units. On a bet with edge E%, long-run expected loss is S × N × E%.
This is why game speed, autoplay features where offered, fast dealer pace, and long sessions all matter. Even if the edge per bet stays the same, more decisions per hour increase the amount exposed to that edge. A slower game or a shorter session does not remove the edge, but it does reduce how many times that edge gets applied.
Why progression systems do not remove the hold
Betting systems often sound persuasive because they change the path of wins and losses. Doubling after losses, increasing stakes after wins, or using any fixed progression can redistribute outcomes across sessions. What they do not do is alter the expected value of the underlying bet.
If a wager has a negative expectation, repeating it in a pattern does not turn it positive. The same house edge still applies each time the bet is placed. Progressions change variance, bankroll strain, and the chance that one session ends ahead or behind by a certain amount, but they do not erase the built-in edge.
In practical terms, that means a progression can make losses arrive in a different shape. It may create many small winning sessions and fewer larger losing sessions, or the reverse, depending on the pattern. But the total action created by the system can also rise quickly, and expected loss is driven by total amount wagered multiplied by the edge. More churn through a negative-expectation bet means more exposure to that edge, not less.
How bonus terms can change the money question
When a session involves bonus funds, free spins, or promotional credit, the hold calculation is no longer just a pure game-maths question. Wagering requirements, game weighting, maximum-cashout caps, restricted games, and expiry windows can all affect whether bonus-related value ever becomes withdrawable.
A wagering requirement is a multiplier stating how much must be wagered before bonus-related funds can be withdrawn. As an example, a 30x requirement on a 50-unit bonus means 1,500 units must be wagered. Game weighting can change how much each wager counts. That means the player may need to generate much more total wagering volume than the bonus amount suggests at first glance.
So if your real question is “what percentage does the house keep when bonus terms are involved,” you need both sets of documents: the game RTP information and the promotion terms. The game tells you the expected rate of loss per wager. The terms tell you how much wagering must be done, which games count, and what restrictions apply to any resulting balance.
FAQ
Is casino hold percentage the same as house edge?
Sometimes people use the terms interchangeably, but you should check the context. In game maths, hold percentage usually means the same built-in advantage as house edge for a specific bet under a specific rule set. In venue reporting, hold may instead describe money retained relative to buy-in, cash in, or another accounting measure.
Can I calculate hold percentage from one winning or losing session?
You can calculate what happened in that session, but not the true long-run hold of the game from that one result. A short session is heavily affected by variance, especially on high-volatility games or bets with uneven payout patterns. To estimate the game's underlying hold, you need the published RTP or the rule-based probability model for that exact wager.
Does changing bet size change the hold percentage?
Changing stake size does not usually change the percentage edge on the same bet under the same rules. What it changes is the money value of your exposure, because expected loss scales with the total amount wagered. The exceptions are situations where a game or jackpot only qualifies certain features at a specified stake, in which case you need to read that game's own rules carefully.
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This article is general information about how these mechanics work. It is not legal advice and not a recommendation to gamble or to use any particular operator. Availability and legality differ by jurisdiction — check the rules that apply where you are.