Game rules and RTP: what to check before you play.

Start with the game information

A return-to-player figure is only one part of a game's explanation. Before committing money, find the rules for that particular game, its payout information and any conditions attached to a feature. This guide explains how to read those documents; it does not identify a profitable game or recommend playing.

The regulatory references concern remote gambling licensed in Great Britain. The Gambling Commission's RTS 3 covers gaming, including bingo, lotteries and virtual-event betting. Information may take different forms for different products: a single RTP figure is not the appropriate explanation for every game. For ordinary sports-betting price calculations, use our fractional and decimal odds guide.

What should be available before a stake?

RTS 3 requires accessible rules and information about prizes and the likelihood of winning before a customer commits to gamble. This can appear in the game's help or information screen. Depending on the product, the explanation may use RTP, house edge, probabilities or a description of how winners and prizes are determined.

Our practical reading checklist is:

• Record the exact game name and provider shown in the information panel.
• Find what counts as a winning outcome and how a displayed prize is calculated.
• Check whether amounts use pounds, credits, the total stake or another stated unit.
• Note restrictions, prize caps and any separate feature rules.
• Save the displayed RTP or other probability explanation with its assumptions.
• Check where a game-round reference and transaction history can be found if a problem occurs.

If something is unclear, ask the operator to identify the applicable rule before spending money. A familiar game title or an attractive screenshot is not a substitute for the information shown for the version in front of you.

Theoretical RTP and actual RTP are different

Theoretical RTP describes the return built into a game's mathematical design. Actual RTP describes the prizes awarded relative to the total stakes over a measured set of play. The Commission's monitoring glossary treats turnover as all stakes, including money won and then staked again. It is not simply the original deposits into customer accounts.

For an invented arithmetic example, suppose records show £2,000 in total stakes and £1,840 in total prizes. The actual RTP for those records is £1,840 ÷ £2,000 × 100 = 92%. That calculation tells you what happened in the selected records. It does not predict the next result or establish whether the game matches its design.

The Commission's monitoring guidance considers sample size and volatility when assessing differences between actual and theoretical RTP. A short run of results is not enough on its own to diagnose a faulty game. Players should not spend more money to gather a larger sample.

A percentage is not a session promise

If a game's theoretical RTP is 96%, it does not promise that a £20 deposit will leave £19.20 at the end of a session. Stakes can be recycled through repeated play, and the distribution of prizes means individual results vary. The percentage is not a guaranteed refund, a withdrawal rate or the probability of winning any one round.

The Commission's consumer explanation uses gaming machines to illustrate why an average over many plays is different from a session outcome. Physical-machine rules and remote-game standards are separate; do not transfer a statement about one category to every online product.

A higher stated RTP does not remove the risk of losing your balance. Comparing percentages cannot tell you how much to deposit or how long to play. You can decide not to gamble after reading the rules.

Volatility and a win are not the same as profit

Volatility concerns the spread of possible results. The Commission's glossary contrasts games whose prizes tend towards large but rare outcomes with those tending towards smaller, more frequent ones. Neither description promises that you personally will receive a prize within a set time.

Keep a prize amount separate from the net outcome of the round. In a hypothetical example, if the total stake is £1 and the amount credited is £0.40, the net result is a £0.60 loss even if the game displays a celebratory animation. If the credited amount is £1, the round has returned the stake but produced no profit. These calculations explain accounting, not a strategy.

Read the paytable's units

A number in a paytable needs a unit and a condition. If a fictional rule explicitly says a qualifying combination pays 12 times the total stake, a £0.50 total stake would correspond to £6 under that rule. If it instead refers to a line stake, that calculation may not apply. The example is not a quotation from a real game.

Before interpreting any multiplier, identify the winning pattern, the relevant stake unit and whether the rules say the displayed amount includes a returned stake. Also read any feature entry or prize-cap wording. If those details cannot be reconciled, stop and request an explanation; do not trigger a paid feature to discover what it costs.

Previous losses do not make a win due

For remote games within its scope, RTS 7 prohibits adaptive behaviour that compensates for earlier results by changing outcome probabilities during play. It also requires randomness and implementation consistent with the described rules. This is not a guarantee that a sequence will look evenly balanced to a player.

Some games have clearly described features or changing states. Follow their published rules rather than assuming every state works identically. A losing streak is not evidence that you should continue until a percentage catches up. If you feel drawn to recover losses, pause and use the safer-gambling support page.

Game rules and bonus terms answer different questions

Game rules explain outcomes and prizes. A promotion's conditions govern eligibility, qualifying activity and use of a reward. A game being available does not establish that its stakes count towards a bonus requirement. Our wagering guide explains the separate calculation, and the offer-terms guide helps identify deadlines and exclusions.

Keep both documents if a reward is involved. Do not continue playing simply because a promotional target is unfinished. Account controls can help limit activity, but no setting or term makes gambling risk-free.

Find the interruption policy before playing

Read the operator's disconnection policy alongside the game rules. UKGC RTS 10 distinguishes a recorded outcome with no remaining player influence, an interrupted single-stage game without an outcome, and a game with decisions still to make. The appropriate treatment depends on the recorded state; a frozen animation does not establish that a stake is refundable.

Before starting, identify where you can find the round reference and history, whether a pending game is shown separately, and which support route handles a missing result. Save the applicable rules rather than relying on a general message about technical problems. A remaining feature or decision can matter, so describe the last action you took when asking for an explanation.

If a round disconnects, pause and reconcile its stake and result entries before interpreting the balance. For example, a recorded prize smaller than the stake is different from a returned stake. Our interrupted casino games guide provides a record checklist and a support-message template. Do not place another stake to reproduce a fault or to recover a disputed amount.

What if the credited result seems wrong?

Save the game title, round reference, date, stake, credited amount and the relevant rule. Avoid sharing account credentials or sensitive documents publicly. Contact the operator through its official support route and ask it to reconcile the transaction with the rule. Our complaints process guide explains how to organise a dispute if it remains unresolved.

A difference from an advertised long-run percentage is not, by itself, proof of an incorrect payment. A specific receipt that appears inconsistent with a paytable is a clearer question to investigate. You do not need to place another stake to make that record useful.