House edge
The operator’s average statistical advantage over the long run. It varies by game and rules.
RTP, house edge and win frequency: three different conceptsClear language · Critical thinking
Gambling and regulation glossary
Understand the vocabulary used by operators, regulators and probability guides before interpreting an offer or rule.
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Essential terms, explained without promotional language
Definitions describe how the concepts are generally used. Contract terms and local law always take priority.
RTP
Theoretical return to player calculated over a very large number of games, never an individual promise.
RTP, house edge and win frequency: three different conceptsVariance
A measure of how widely results fluctuate around the expected average.
Understand variance and gambling streaksVolatility
A practical description of the frequency and size of a game’s wins and losses.
Understand variance and gambling streaksExpected value
The theoretical average result of a decision repeated a very large number of times.
RTP, house edge and win frequency: three different conceptsProbability
A measure between 0 and 1 of how likely an event is to occur.
Understand variance and gambling streaksOdds
A representation of estimated probability and potential payout, including operator margin.
Read betting odds without treating them as a predictionMargin
The adjustment built into odds or rules that contributes to the operator’s expected revenue.
Read betting odds without treating them as a predictionStake
The amount risked on a game or event and liable to be lost.
Calculate the real cost of a gambling sessionBankroll
A separate gambling budget that must never include money needed for essentials.
Calculate the real cost of a gambling sessionBonus
A promotional benefit subject to conditions, often wagering requirements and deadlines.
How to read gambling bonus termsWagering requirement
The amount that must be wagered before a bonus or related winnings may be withdrawn.
How to read gambling bonus termsLicence
Authorisation granted to an entity for specifically defined products, domains and territories.
Check a gambling site: domain, licence and warning signsRegulator
Authority responsible for supervising the market, licensing and enforcement.
Check a gambling site: domain, licence and warning signsWhitelist
Official register of operators, domains or products currently authorised.
Check a gambling site: domain, licence and warning signsKYC
Know Your Customer checks used to verify identity and age, among other matters.
Identity checks and withdrawals: protect your documentsSelf-exclusion
A tool allowing a person to block their own access to gambling for a defined period.
Take a gambling break that actually protects youDeposit limit
A cap on the amount that can be deposited over a given period.
Take a gambling break that actually protects youChasing losses
Increasing or repeating bets in an attempt to recover a loss quickly.
Safer gambling: limits, warning signs and supportProblem gambling
Gambling that causes or risks financial, relational, professional or health harm.
Safer gambling: limits, warning signs and supportRandom number generator
A system producing digital game outcomes through a controlled, unpredictable process.
Slot machinesIndependent events
The principle that a past result does not change the probability of the next draw.
Understand variance and gambling streaksGambler’s fallacy
The mistaken belief that a past streak makes the opposite result due soon.
Understand variance and gambling streaksLiquidity
Available volume of players or bets, especially relevant to poker and betting markets.
Texas Hold’em pokerCash out
An option to settle a bet before it ends at a recalculated value.
Cash out: early settlement and its limitsProgressive jackpot
A prize pool that grows with wagers until it is triggered.
Slot machinesLive dealer game
A streamed game with a real dealer, subject to the same legal checks as the relevant offer.
RouletteAuthorised domain
An internet address expressly linked to a licence in an official register.
Check a gambling site: domain, licence and warning signsPayout percentage
The theoretical share of stakes returned as prizes over a long period, not an individual forecast.
RTP, house edge and win frequency: three different conceptsRake
A fee charged by a poker room from a pot, game or entry amount.
Texas Hold’em pokerAccumulator bet
A bet combining several selections, each of which normally must win for the quoted payout to apply.
Accumulator bets: combined odds and compounded riskParimutuel payout
A payout calculated from the betting pool after deductions and divided among winning tickets.
Horse-race bettingMaximum stake
The highest amount accepted on a game, selection or during a defined period.
How to read gambling bonus termsNet loss
The difference between money actually paid in and money successfully withdrawn over the period reviewed.
Calculate the real cost of a gambling sessionTime-out
A voluntary temporary account block, shorter than and distinct from formal self-exclusion.
Take a gambling break that actually protects youLoss limit
A preset cap intended to stop or restrict play when net losses reach it.
Take a gambling break that actually protects youFree bet
Promotional credit whose stake, winnings, validity and withdrawal terms may be restricted.
How to read gambling bonus termsGambling session
A continuous period of activity whose duration, deposits, stakes and result can be tracked together.
Calculate the real cost of a gambling sessionPrize pool
The total amount allocated to winners, fixed or funded from stakes under the rules.
Texas Hold’em pokerPayout
The amount returned after a winning result, which may or may not include the original stake.
Calculate the real cost of a gambling sessionBonus stake
Promotional value usable for betting, often non-withdrawable and subject to specific terms.
How to read gambling bonus termsDecimal odds
A format showing the theoretical total return per unit staked, including the original stake.
Read betting odds without treating them as a predictionNon-runner
A competitor withdrawn before an event, with bets handled under the applicable rules.
Horse-race bettingVoid bet
A bet declared invalid under the rules, normally with the affected stake returned.
Sports bettingWithdrawal limit
The maximum amount withdrawable in one transaction or period under the service terms.
How to read gambling bonus termsAccount history
A record of deposits, withdrawals, bets, wins, bonuses and adjustments on an account.
Identity checks and withdrawals: protect your documentsTwo-factor authentication
Security requiring a second proof of control in addition to a password at sign-in.
Secure a player account and its email accessDomain impersonation
Use of an address resembling a known service to mislead users about a website’s identity.
Online gambling scams: fake sites and impersonationCash balance
The part of an account made up of deposited money or withdrawable winnings, separate from bonus credit.
Calculate the real cost of a gambling sessionBonus balance
Promotional credit governed by offer-specific use, expiry and conversion rules.
How to read gambling bonus termsRollover
A wagering multiple applied to a deposit, bonus or winnings before withdrawal is allowed.
How to read gambling bonus termsDemo play
A no-money version demonstrating gameplay that may not reproduce the experience of real financial risk.
Understand variance and gambling streaksDraw history
A record of past outcomes, useful for reference but not predictive when draws are independent.
Understand variance and gambling streaksHit frequency
The theoretical share of plays producing a payout, without by itself showing payout size or net result.
RTP, house edge and win frequency: three different conceptsMaximum win
The largest payout available under the rules, often tied to conditions and a very low probability.
How to read gambling bonus termsSide bet
An optional bet alongside the main game, with its own probability and usually its own margin.
BlackjackPush
A tied result under the rules where the main stake is normally returned.
BlackjackFairness audit
A documented review of a game’s random operation and parameters by a competent body.
Check a gambling site: domain, licence and warning signsPot
The total stakes committed during a poker hand and awarded according to its outcome.
Texas Hold’em pokerBlind
A compulsory stake posted before cards are dealt in several poker variants.
Texas Hold’em pokerAnte
A compulsory contribution paid before a hand, usually by every player or on behalf of the table.
Texas Hold’em pokerAll-in
The act of committing all chips currently available in a poker hand.
Texas Hold’em pokerSide pot
A separate pot created when players continue betting beyond another participant’s all-in amount.
Texas Hold’em pokerHandicap
A theoretical advantage or disadvantage applied to the score to form a balanced betting market.
Sports bettingOver/under
A bet on whether a total will finish above or below a stated line.
Sports bettingSingle bet
A bet containing one selection and settled independently of any other prediction.
Sports bettingBetting market
A specific question offered on an event, with its selections, rules and odds.
Sports bettingBetting cutoff
The time after which a bet can no longer be accepted for an event or draw.
Sports bettingSession time limit
A chosen or imposed maximum duration for a continuous period of play.
Take a gambling break that actually protects youReality check
A periodic notice showing elapsed time and sometimes the session’s financial result.
Take a gambling break that actually protects youAge verification
A check intended to prevent access by people below the legally required age.
Minors and gambling: protect access and start a conversationDormant account
An account with no activity for the period defined in the service terms.
Identity checks and withdrawals: protect your documentsWithdrawal time
The time between a request, any required checks and actual receipt of funds.
Identity checks and withdrawals: protect your documentsDispute resolution
An independent or regulated process for reviewing a dispute after a complaint to the service.
Resolve a dispute with a gambling operatorImplied probability
The probability derived from odds before adjusting for margin and market rules.
Read betting odds without treating them as a predictionOverround
Implied probabilities totalling above 100%, used as an indicator of market margin.
Read betting odds without treating them as a predictionBoosted odds
Promotional odds increased for a selection, subject to time, stake and eligibility terms.
Read betting odds without treating them as a predictionRefund
The return of a stake or payment under a defined reason and procedure.
Sports bettingPayout cap
A contractual limit on the amount payable for a ticket, game or period.
How to read gambling bonus termsMinimum stake
The smallest amount accepted to enter a game or select a market.
Calculate the real cost of a gambling sessionPaytable
A chart linking each qualifying outcome to the payout for that game version.
Slot machinesMultiplier
A factor applied to a stake or win when the stated conditions are met.
How to read gambling bonus termsFree spin
A promotional spin whose value, winnings and withdrawal remain subject to stated terms.
How to read gambling bonus termsBonus feature
A special sequence or rule triggered within a game and described in its paytable.
How to read gambling bonus termsRandom mechanic
An element whose outcome is determined by chance rather than player action.
Slot machinesRandom seed
An initial value used by a system to produce a sequence of pseudorandom results.
Slot machinesCertification
An attestation covering a specific scope and issued after defined checks.
Check a gambling site: domain, licence and warning signsIndependent audit
A review by a body separate from the assessed entity under a stated standard.
Check a gambling site: domain, licence and warning signsComplaint
A formal request to a service disputing an operation or seeking a documented response.
Resolve a dispute with a gambling operatorSource of funds
Documents or information explaining the legitimate origin of money used.
Identity checks and withdrawals: protect your documentsDeposit cap
The maximum amount that can be paid into an account during a set period.
Take a gambling break that actually protects youSelf-limiting
Voluntarily setting deposit, loss, stake or time caps before playing.
Take a gambling break that actually protects youVoluntary exclusion
A formal step preventing one’s own access to covered gambling offers for a stated period.
Take a gambling break that actually protects youSafer-gambling message
Information highlighting risks, limits or support resources associated with gambling.
Safer gambling: limits, warning signs and supportReport
Submitting information to a platform or authority about suspicious content or behaviour.
Online gambling scams: fake sites and impersonationPhishing
An attempt to obtain credentials, documents or payments by imitating a trusted service.
Online gambling scams: fake sites and impersonationConditional probability
The probability of an event calculated given information or a condition already known.
Accumulator bets: combined odds and compounded riskStandard deviation
A statistical measure of how results are dispersed around their average.
Understand variance and gambling streaksSample
A limited set of observed results that may differ substantially from long-run behaviour.
Reading gambling statistics: populations, dates and unitsGross return
The total amount returned before subtracting related stakes, fees or losses.
Calculate the real cost of a gambling sessionNet result
The final difference between all amounts received and all amounts committed over a period.
Calculate the real cost of a gambling sessionCommission
A fee deducted from a stake, pot, win or transaction under the applicable terms.
Calculate the real cost of a gambling sessionBuy-in
The amount paid to enter a tournament, sometimes split between prize pool and fee.
Texas Hold’em pokerRebuy
An additional chip purchase allowed in some tournaments during a defined period and under stated rules.
Texas Hold’em pokerGuaranteed prize pool
The minimum advertised tournament prize pool regardless of final entry numbers.
Texas Hold’em pokerBet settlement
Applying the rules to the official result to determine a win, loss, refund or void.
Sports bettingOfficial result
The result used to settle a market under the source and timing stated in the rules.
Sports bettingMarket suspension
A temporary halt to accepting bets during play, verification or major price movement.
Sports bettingGeolocation
A location check used to apply territorial restrictions.
Check a gambling site: domain, licence and warning signsVerified account
An account whose identity information has been checked under the applicable process.
Identity checks and withdrawals: protect your documentsBlacklist
An official or technical list of sites, entities or methods identified as prohibited or risky.
Check a gambling site: domain, licence and warning signsMinor protection
Checks and prohibitions intended to prevent access by underage people.
Minors and gambling: protect access and start a conversationPractical guide
Put the definitions to work
A glossary term only becomes useful when read alongside the applicable rules, local law and the exact offer.
Connect mathematical terms
RTP is a long-run theoretical average; variance describes how actual sessions can diverge. An implied probability is a conversion from an offered price, not a guaranteed forecast.
Read commercial language literally
Bonus, jackpot and cash out can describe possibilities with conditions. Find the wagering requirement, eligible products, settlement rule and withdrawal restrictions before assigning value to the offer.
Check the jurisdiction
A licence label needs the issuing authority, legal holder, exact domain, permitted product and player location. The same word may refer to different permissions in different countries.
Connect definitions to a decision
For payouts, connect stake, gross return, profit and net result. For promotions, connect bonus balance, wagering, maximum stake and withdrawal cap. An isolated definition may hide an important condition.
Synonyms do not create identical rules. RTP and payout rate describe a related concept; withdrawal and winnings concern different stages. Read the specific product rules.