Slots not on gamstop: the catalogues and the cost

Cost a mid-size offshore slot bonus honestly and the headline shrinks: at this page’s model, a £40 credit at 35x wagering, slots counted in full, a 96% assumed return, clearing it takes £1,400 of slot turnover and about £56 of expected cost, a £16 expected loss on the word bonus. The chart, the model table and the comparison table below put numbers on the wider catalogue, the weighting that governs it and the self-exclusion gap that runs underneath all of it.

The board below is paid placement, and the site’s paid apparatus behind it is described on our How we are paid page. It opens the page because it is commercial, not because any model on this page scored it. Treat it as the market’s shop window; the sections and tables underneath are the price list.

What the offshore slot lobbies carry

A slot lobby is a catalogue: titles licensed in from the big studios, assembled under whatever rules bind the operator doing the assembling. Under the Gambling Act 2005, a remote operator needs a Commission operating licence whenever it provides gambling facilities to customers in Great Britain, wherever the operator itself is based. That licence reaches into the lobby, not just the cashier: licensees must offer terms that are fair, clear and not misleading, and must keep customer funds separate from business funds and publish the level of protection those funds carry. An operator with no British licence carries none of those duties, and a catalogue assembled without them has nothing that forces a trim.

So the difference readers notice first is breadth. Offshore lobbies are built for an international audience, and their lists run deeper: longer stretches of a studio’s back catalogue, more variants of the fishing-boat franchise, more of the Irish-themed series, more re-skins of the same engines gathered under one roof. The licensed lobbies are not thin, a slots brand built around one long-running Irish-themed franchise, or a slots-first casino attached to a major British betting brand, shows how deep a British list can run, but they are curated lists, assembled inside duties the offshore operator does not share. Breadth is the honest selling point of the offshore catalogue. It is also the least decisive number on the page, because a longer menu at a weaker structural position is more choice, not a better deal.

A few offshore lobbies are slots portals outright. An offshore slots portal with a large free-play catalogue is the far end of the shape: the free-play grid is the product and the real-money layer wraps around it. Most offshore casinos sit nearer the middle, a general lobby whose slot list dwarfs its table section, but the emphasis is the same across this end of the market: slots first, everything else a side room.

Weighting decides whether a bonus clears

Weighting is the share of each stake that a bonus’s wagering requirement counts, and it is the single number that decides whether a slot bonus is playable or decorative. Slot-first terms are the norm at both ends of the market, but the fraction matters everywhere. In this page’s model, slots and instant games count at 100%, ordinary table games at 10% and live tables at 5%. Those are stated assumptions, chosen so the arithmetic can be checked; the pattern they describe, slots in full, tables a fraction, is the reason a slots page leads with weighting before anything else.

The worked model: a £40 bonus at 35x wagering. At slot weighting the full £1,400 of turnover counts, which at 20p a spin is 7,000 spins: fourteen of the modelled sessions described below. At the model’s table weighting, each £1 staked counts 10p, so the real target becomes £14,000 of actual stakes; at the live-table weighting it becomes £28,000. The table below is the whole argument in three rows.

Read the last column against the bonus size. At the live-table weighting, £28,000 of stakes at the modelled 96% return carries about £1,120 of expected cost: twenty-eight times the bonus it is meant to clear. Weighting is not small print; it is the difference between a target reachable in a fortnight and one that is not reachable at all.

Return figures and modelled session cost

Return is the second number that sets the price. This page assumes a 96% return on slot turnover, an assumption chosen for clean arithmetic, not a certified figure for any named game, and every individual session swings far around any average. At 96%, each £100 turned over costs £4 on average; the expected cost of play is one twenty-fifth of turnover, and the jurisdiction a site is licensed in does not change that arithmetic.

The session model: 500 spins at 20p is £100 of turnover and £4 of expected cost. The heavier variant, £1 a spin, is £500 of turnover and £20. Ten heavier sessions a month is £200 of expected cost; and none of it arrives as a bill, because variance hands the losses out unevenly. Some sessions finish up, most finish down, and the model prices only the drift. Written down this way, the catalogue’s price is set by stake and spin count, not by which list a game sits on.

Join the two models and the bonus arithmetic closes: £1,400 of slot turnover at a modelled 96% return costs £56 in expected return, so the £40 bonus clears, on average, £16 down. Offshore bonuses are bigger than the British baseline and more expensive to carry; the size and the cost move together, and only one of them is advertised.

Self-exclusion stops at the licensed border

GamStop is the national online self-exclusion scheme for people in Great Britain, and registering with it is free. One registration covers every online operator licensed by the Commission, and it runs for the minimum period chosen at sign-up, six months, one year or five years, with no cancellation before the term ends. The boundary is what matters on this page: the scheme’s coverage stops at operators licensed by the Commission, so it cannot block an operator that holds no UK licence, and no UK self-exclusion scheme extends beyond the Commission’s licensing regime. The catalogues described in the first section sit exactly on the far side of that line. An exclusion registered in earnest does not reach them, and that is the honest cost of the offshore catalogue: it stays open precisely to the people the scheme was built to close the door on.

What that costs in pounds cannot be modelled, because it is paid in relapses rather than stakes. What it costs in policy is stated here instead. This page describes what offshore slot sites are, what their promotions cost and where their protections are absent; it contains no instruction, no workaround and no route back in for anyone who has excluded, and it is not written to help anyone defeat the scheme. If gambling has stopped feeling like a choice, the resources below are free and they are the right next step.

What a British licence would change

The permit comparison is the spine of the subject. A Commission licence puts an operator inside a statutory regime: providing gambling facilities to British customers without the licence the Act requires is a criminal offence for the operator, and advertising unlicensed gambling facilities is an offence as well. Inside the regime, the licence buys a defined set of player protections: terms that are fair, clear and not misleading, customer funds kept separate with the protection level published, a free, independent complaint route for unresolved disputes, a regulator holding financial penalty, suspension and revocation powers, and a public register anyone can check.

Offshore sits outside all of that. Curaçao licenses online gambling operators serving international customers, and its 2024 reform, the National Ordinance on Games of Chance, replaced the old master-licence system with a regulator that issues licences directly. A Curaçao licence is nonetheless not a UK licence and does not authorise an operator to provide gambling facilities to customers in Great Britain. On this site, offshore means only that an operator holds no Commission licence; it asserts nothing about where the operator is based or what other permissions it may hold.

Three consequences for the player are worth stating plainly. Gambling with an operator that holds no Commission licence is not, in itself, an offence for a person in Great Britain. Winnings are not chargeable to income tax for players in the United Kingdom. And the ban on credit-card gambling binds Commission licensees as a condition of their licence, so it does not of itself bind operators outside that regime. Lawful to play, untaxed to win, and unprotected throughout: that is the honest shape of the trade the offshore catalogue offers.

Spin packs on offshore lobbies

Spin packs are the slot catalogue’s native currency, and they are where offshore lobbies compete loudest. The mechanics are identical at both ends of the market; only the dials move. A pack is a number of spins at a fixed per-spin value, this page’s model pack is 100 spins at 10p, £10 of nominal play, and what the player keeps depends on three dials: whether winnings land as cash or as bonus, what wagering applies to them, and how long they last.

Run the dials. If the winnings land as cash, the pack is worth what it wins and the rest is decoration. If they land as bonus at the model’s 35x, then £5 of spin winnings carries a £175 turnover target, which at slot weighting and a modelled 96% return has an expected cost of £7: more than the winnings themselves. That is the honest accounting behind every large pack: the headline counts spins, the value counts what survives the wagering and the expiry. Expiry is the quiet dial. Packs credited in daily drips can lapse before the last drip lands, and a pack that expires unused costs the operator nothing. None of this is unique to offshore lobbies; what differs is that the dials sit in terms with no British regulator reading over the operator’s shoulder, and the free complaint route a licensed player holds does not exist here.

The comparison table, read honestly

Set the table’s two halves against each other. The licensed rows are the British baseline, present for shape rather than claiming: a slots-first casino attached to a major British betting brand, a centuries-old British bookmaker with a full online casino, and a long-established British bookmaker’s casino arm show what slot promotions look like inside the regime, with the regulator’s codes sitting behind every term. The offshore rows run from an offshore slots portal with a large free-play catalogue to card-and-coin and crypto-led cashiers, with offer bands several times the British ones and wagering to match. Read the licence column first, the wagering column second and the offer column last: the offer is the number most likely to mislead, and the licence is the number that decides everything the middle sections described.

How this page models the numbers

Every figure on this page comes from one stated model, so it can be checked, criticised or rerun. The bonus model is a £40 credit at 35x wagering. The weighting model counts slots and instant games at 100%, RNG table games at 10% and live tables at 5%. The return model assumes 96%, which makes expected cost exactly one twenty-fifth of turnover. The session model is 500 spins at 20p, with a £1-a-spin heavy variant; the spin-pack model is 100 spins at 10p with winnings credited as bonus at 35x. Rounding happens once, at display.

Three things the model is not. It is not a quote of any operator’s terms: the comparison table’s figures are category-typical ranges, exactly as its closing note records. It does not describe the certified return of any named game. And it does not predict an individual session: variance is the largest number in the model and the least visible one. Where a reader’s own stakes differ, the arithmetic scales cleanly: expected cost is turnover times one twenty-fifth, and every row of the weighting table rescales by the same ratio.