RTP is the number casinos put on game info screens to suggest fairness, the way a nutrition label on a cereal box suggests health. It stands for Return to Player: the percentage of all money wagered on a game that it is designed to pay back over an extremely large sample, think millions of spins, not your Tuesday evening session where you told yourself you would stop at even.

A slot advertised at 96% RTP is built to return $96 for every $100 wagered in the long run. The remaining 4% is the house edge (see below). In a single session you can finish up $500 or down $500. RTP describes the engine over time. Your session is a single trip in one car on a very long road, driven by someone who has had three beers and a bonus email.

Where it gets useful: comparing games. Two slots side by side, one at 94% RTP, one at 97%, the 97% game is mathematically better value over millions of spins. Where it gets misleading: assuming RTP guarantees anything about your next hour. It does not. Also check whether the RTP shown is the default setting. Some slots have configurable RTP versions and casinos can choose the lower one. The 96% on the info panel is a suggestion. The version running on your account is a business decision.

House edge is RTP's less marketable sibling, the one that does not get a banner. It is the casino's built-in advantage, expressed as a percentage of each wager they expect to keep over time. 96% RTP equals 4% house edge. 99% RTP equals 1% house edge. The casino is not running a charity, unless you count the VIP manager who calls you by your first name while you are down four figures. Every game has an edge. Your job is knowing what it is before the slot animation convinces you otherwise.

Edges vary wildly by game type. Blackjack with basic strategy can run under 1%. European roulette sits around 2.7%. Many slots land between 3% and 6%. Original crypto games, crash, dice, plinko, often advertise a fixed edge (commonly 1% on dice) which is refreshingly honest compared to a slot that hides its maths behind a colourful dragon and a soundtrack designed to stop you thinking.

“The house always wins” is true in aggregate, not in every session. People do win. The edge just means that if everyone played forever, the casino would end up ahead. You are not playing forever. You are playing until your lunch break ends or your balance does, whichever comes first. The edge is still there on every spin, quietly doing its job.

Volatility, also called variance, describes the shape of the payouts, not the overall return. Two slots can both have 96% RTP while feeling completely different. A low-volatility game pays small amounts frequently. Your balance drifts gradually. A high-volatility game can eat fifty spins without a meaningful win, then drop a multiplier large enough that the local strippers and dealers had better get ready for a long night.

Casinos label this low, medium, or high on game info panels when they bother to label it at all. High volatility suits players who want a shot at a big hit and accept long dry spells. Low volatility suits players who want their balance to last. Neither is morally superior. Both can lose you money at the same RTP.

Streamers love high-volatility slots because the footage of a 500x hit is more compelling than forty minutes of small wins. Conveniently, many of them are playing with terms you will never see in a bonus email: house-funded balance, elevated bet limits, and a promotional arrangement that makes a cinematic multiplier possible in a way your Tuesday deposit never will. The slot did not know it was being streamed. The casino did. This is not a recommendation. It is a content strategy. We wrote a whole guide about it.

Hit frequency is the percentage of spins that produce any win at all, even a win smaller than your stake. A slot with 25% hit frequency pays something on roughly one in four spins. The other three eat your balance in increments small enough to feel manageable right up until they are not.

Hit frequency and volatility overlap but are not the same thing. A game can hit often with tiny payouts (low volatility, high hit frequency) or rarely with enormous ones (high volatility, lower hit frequency). A win that returns less than you bet still counts as a hit. The game flashes. The sound effect plays. Your balance still goes down. This is how a slot can feel “active” while you are slowly losing, a design feature, not a coincidence, built by people who understand variable-ratio reinforcement and sleep perfectly well at night.

The wagering requirement is how many times you must bet bonus funds before they become withdrawable cash. It appears on every deposit match, most free-spin winnings, and a surprising number of offers described as “free” in the same way a sample perfume is free: technically yes, but you will pay for it eventually. Thirty times is common. Forty times is aggressive. Fifty times is the casino making a point about who is in charge of this relationship.

Example: you deposit $100, receive a $100 bonus, and the terms say 30x on the bonus. You must place $3,000 in total bets before withdrawing anything derived from that bonus. If the requirement applies to deposit plus bonus, the total doubles to $6,000. The percentage on the banner did not mention this part. The banner rarely does. That is what the banner is for.

For a full breakdown of how wagering interacts with max bet rules, game weighting, and the other conditions attached to bonuses, see our bonus terms guide.

Max bet is the largest single wager allowed, often capped at $5 per spin while a bonus is active. Exceed it once, even accidentally, and the casino may void your bonus and any winnings from it, a clause they enforce with the enthusiasm of a bouncer who has been waiting all night for someone to step out of line. The limit exists in the terms. The terms exist in a font size that communicates confidence that you will not read them, and they are usually right.

Max cashout is the ceiling on what you can withdraw from bonus winnings regardless of what you actually won. Turn $20 of bonus into $2,000, hit a $500 max cashout, and $1,500 stays with the casino. This is not a bug. It is not a misunderstanding. It is a clause written by someone who has seen this exact scenario before and planned for it. Find it before you accept the offer, not after you have already told someone about your big win.

A sticky bonus cannot be withdrawn, only the profit above it can, once wagering is complete. Finish the rollover on a $100 sticky bonus with $150 in profit and you withdraw $50, not $150. The bonus itself was never yours. It was theatre. Expensive theatre, if you cleared the wagering, but theatre nonetheless.

A non-sticky bonus (sometimes called cashable or parachute) can be withdrawn along with winnings once wagering is done. It is the better structure, the one casinos offer when they want your deposit and hide when they want your deposit plus your dignity. Casinos prefer the sticky one. That should tell you something. More on every bonus type in our bonus types guide.

Provably fair is what happens when a crypto casino discovers that “trust us” sounds worse in a Discord than “cryptographically verifiable.” It is a verification system used on many crypto casino original games, crash, dice, limbo, mines. Before a round, the casino commits to a hashed server seed. You provide a client seed. The outcome is generated from both. After the round, you can verify the result was not changed mid-flight, assuming you are the kind of person who verifies things mid-flight instead of chasing the next multiplier.

It answers a specific question: “Was this individual result manipulated?” It does not answer: “Is this game a good deal?” or “Will this casino pay me if I win enough to annoy them?” A provably fair dice game with a 2% house edge is provably fair and provably worse value than one with a 1% edge. Provably fair also does not apply to most third-party slots from providers like Pragmatic or Hacksaw. Those run on audited RNG systems instead, a different trust model, same need to check the RTP, same colourful dragon, same problem.

The inputs that make it work are the server seed, client seed, and nonce. We cover those properly in the next section.

On provably fair games, every round is built from two random inputs plus a counter. The casino generates a server seed, a long string of characters only they know at the start. Before you bet, they show you a hash of that seed, a one-way fingerprint that proves they have already committed to a value they cannot change after seeing your bet. Think of it as the casino sealing an envelope and showing you the wax stamp before you pick a number, which is more courtesy than you get at most bonus terms pages.

The client seed is yours. On most sites you can leave the default, edit it manually, or rotate it between sessions. Because the outcome combines both seeds, changing your client seed changes the results without the casino needing to regenerate theirs mid-round. If a platform never lets you change the client seed, the “provably fair” label is doing less work than the marketing team who put it on the homepage.

The nonce (no we are not talking about 80s children's TV presenters here) is simply a counter that increments each bet so the same seed pair does not produce the same result twice. Round one uses nonce 0, round two uses nonce 1, and so on. After the round, the casino reveals the unhashed server seed. You plug server seed, client seed, and nonce into the site's verifier (or an independent one) and confirm the outcome matches. If it does not, something is wrong and you should probably stop giving them money until someone explains why. If it does, you have proof that specific result was fixed before you played, not edited because you won, which is more accountability than most support chats offer.

What this does not prove: that the house edge is fair, that the game pays what it claims, or that the operator will honour a withdrawal when you win enough to make their risk team nervous. It proves integrity for that single roll, not virtue for the business running it. You can verify the maths on a loss that still cost you money. Cryptography is not a refund policy.

KYC (Know Your Customer) is identity verification: passport, proof of address, sometimes a selfie holding both while looking like you are being processed at a border you did not know existed. AML (Anti-Money Laundering) is the broader legal framework requiring casinos to check where money came from. A source of funds (SOF) request asks you to prove it, bank statements, payslips, tax records, whatever paperwork best demonstrates that yes, you really did earn this money and no, we cannot explain why that matters only after you win.

These are regulatory requirements, not personal insults, though casinos sometimes apply them with timing so convenient you would think compliance departments share a calendar with the risk team. Deposit in minutes. Withdraw in weeks. Suddenly they need a clearer photo of your passport. Full guide: KYC explained.

When you request a withdrawal, it passes through statuses that sound similar and mean different things, a vocabulary designed to keep you calm while nothing happens. Pending usually means the request is logged but not yet actioned. Processing means someone or something is working on it, blockchain confirmation, internal checks, manual approval, possibly a coin flip. Under reviewis the one that should make you pay attention: it often means compliance is involved and the timeline is no longer governed by the “instant crypto withdrawal” promise on the homepage, which was always more of a mood than a commitment.

Legitimate processing takes minutes to a few days depending on the amount and operator. “Under review” for two weeks with no document request is a different category of problem, the kind where support starts calling you “valued player” with increasing frequency. See our withdrawal guide for what to do when processing stops being a status and starts being a lifestyle.

While clearing a wagering requirement, not every game counts equally. Slots often contribute 100%, every $1 wagered counts as $1 toward the rollover. Table games frequently contribute 10% or less, or are excluded entirely. Live blackjack at 10% means you must wager ten times as much to clear the same requirement, which is the industry's polite way of saying they would prefer you played the high-volatility slot with the dragon on it.

This is why “play whatever you like” on a bonus is rarely accurate. The terms include a contribution table. It is not hidden. It is just not on the banner, because the banner is where optimism lives and the contribution table is where optimism goes to die.

• On-chain withdrawal: Paid directly to your wallet via the blockchain. Transparent, traceable via transaction hash, and the closest thing this industry has to a receipt.
• Off-chain / internal transfer: Moved within the casino's own system. Faster, but you are trusting their ledger until it hits the chain, like trusting a mate who says the money is “basically in your account.”
• Gas fees: Network costs for blockchain transactions, sometimes passed to you on withdrawal. Nothing in crypto is truly free, especially the free stuff.
• Confirmations: The number of blocks added after your transaction. Casinos often require one or more before crediting a deposit or releasing a withdrawal: a delay they describe as security and you experience as suspense.

• Rakeback: A loyalty return calculated on total wagered volume. Reduces the cost of playing, with terms attached, because even the money they give back has conditions.
• Cashback: A loyalty return calculated on net losses. Same idea as rakeback, different maths, same fine print.
• VIP tier: The ladder you climb by wagering enough to unlock better rates. A gamification layer for people who were already going to lose the money and needed a badge for it.

The math rarely favours chasing a tier you were not already going to reach organically, unless your goal is a dedicated account manager who remembers your birthday and your monthly handle.