Glossary

A cap on the pool. Where one exists, RTS 9A guidance asks the rules to say where later contributions go.

Used in: How do progressive jackpots work in online casinos: the rules, read in three passes, A must-drop jackpot needs a deadline or an amount threshold, Online casino jackpots explained: the pool, the trigger and the prize

The fixed amount added to an eligible round's stake for the optional feature; money committed, not a personal balance.

Used in: An optional jackpot contribution belongs in the total stake

The slice of each eligible stake that goes into the pool. Neither page we read states it.

Used in: Best progressive jackpot slots: the four parts, from the terms, A must-drop jackpot needs a deadline or an amount threshold, An optional jackpot contribution belongs in the total stake

The network Evolution’s official brands page identifies with Red Tiger. It does not establish that every casino using Red Tiger content offers the same jackpot tiers or conditions.

Used in: Online casino jackpots explained: the pool, the trigger and the prize

Switching a jackpot off for good. RTS 9B asks for the money in it to be returned fairly to the players who paid in.

Used in: How do progressive jackpots work in online casinos: the rules, read in three passes

A stake that can win the jackpot. If yours cannot, the rules should say so and give the RTP you are playing for instead.

Used in: How do progressive jackpots work in online casinos: the rules, read in three passes

A named prize whose trigger, eligibility and size are defined in a game’s rules.

Used in: A jackpot counter is not a probability, How do progressive jackpots work in online casinos: the rules, read in three passes, The disclosures a progressive jackpot has to make before it pays out, Best progressive jackpot slots: the four parts, from the terms

A jackpot whose rules say it has to be won by a set time or before it reaches a set amount.

Used in: How do progressive jackpots work in online casinos: the rules, read in three passes, An optional jackpot contribution belongs in the total stake

A prize layer a customer opts into, with its own eligibility condition and, in the named product, its own addition to the selected stake.

Used in: An optional jackpot contribution belongs in the total stake

The list of fixed amounts a regular slot pays, set out in the game itself rather than in a growing pool.

Used in: Best progressive jackpot slots: the four parts, from the terms

A prize pool that grows under its own published rules, as opposed to a fixed amount that does not grow.

Used in: A must-drop jackpot needs a deadline or an amount threshold, An optional jackpot contribution belongs in the total stake

A prize that grows from contributions taken out of the money staked, starting from a pre-set base value. This is the Commission’s definition, read 23 September 2026.

Used in: How do progressive jackpots work in online casinos: the rules, read in three passes

A reserve, if the rules include one, has a different role from money currently displayed as available in that pool.

Used in: Online casino jackpots explained: the pool, the trigger and the prize

What the terms say happens to the pool after an award.

Used in: A must-drop jackpot needs a deadline or an amount threshold

A theoretical average proportion of stakes returned as prizes over many plays; not a session guarantee.

Used in: How do progressive jackpots work in online casinos: the rules, read in three passes

Return to player: the share of stakes a game is designed to pay back over a very large number of plays. It is not a forecast for one session.

Used in: How do progressive jackpots work in online casinos: the rules, read in three passes, Best progressive jackpot slots: the four parts, from the terms, An optional jackpot contribution belongs in the total stake

The Gambling Commission’s remote gambling and software technical standards. RTS 9 covers progressive jackpot systems; RTS 3 covers rules and game descriptions.

Used in: How do progressive jackpots work in online casinos: the rules, read in three passes, Best progressive jackpot slots: the four parts, from the terms, A must-drop jackpot needs a deadline or an amount threshold, An optional jackpot contribution belongs in the total stake

In jackpot rules, the start-up amount the pool begins from. In the Commission’s definition of terms, seeding means something else: setting the starting state of the random number generator.

Used in: How do progressive jackpots work in online casinos: the rules, read in three passes, Best progressive jackpot slots: the four parts, from the terms, A must-drop jackpot needs a deadline or an amount threshold

A formal agreement not to gamble with an operator or across operators for a set period. The Commission’s page on it also gives the 24-hour helpline number.

Used in: How do progressive jackpots work in online casinos: the rules, read in three passes

The amount put at risk in a particular bet.

Used in: A jackpot counter is not a probability, How do progressive jackpots work in online casinos: the rules, read in three passes, Best progressive jackpot slots: the four parts, from the terms, A must-drop jackpot needs a deadline or an amount threshold

A starting seed is the value from which a stated pool begins.

Used in: Online casino jackpots explained: the pool, the trigger and the prize

One screen may carry several different pools. If a question concerns a particular award, identifying the tier is part of identifying the event.

Used in: Online casino jackpots explained: the pool, the trigger and the prize

The sum of stakes placed; distinct from deposits, losses and account balance.

Used in: Online casino jackpots explained: the pool, the trigger and the prize

A request to transfer eligible funds out of an account through a supported method.

Used in: How do progressive jackpots work in online casinos: the rules, read in three passes