Sites like your casino.
Ranked fair and square.

Of the 247 casinos in our index, 27 are not UKGC-licensed. They operate under offshore licences — most commonly Curaçao (16), Anjouan (8), Costa Rica (2), and a small number from other jurisdictions. They accept UK players, they take UK deposits, they pay out in pounds. They are not illegal for UK residents to use. But they sit outside the UK’s regulatory framework, and that changes what protections you actually have.

A UK Gambling Commission licence is one of the most stringent in the world. It requires affordability checks, mandatory GAMSTOP integration (every UKGC-licensed casino is connected to the national self-exclusion register by law), capped bonus terms, and dispute jurisdiction through bodies like IBAS and eCOGRA. The commission has prosecution authority. Operators that breach the rules face fines of millions of pounds — the UKGC issued £107 million in penalties across 2023 alone — and licence revocation is a real outcome.

An offshore licence operates on a different model. The Curaçao Master Licence costs an operator around $20,000 a year. There is no GAMSTOP integration. There is no mandatory affordability protocol. UK players who use these casinos have no UK dispute jurisdiction; arbitration runs through whichever body the licence specifies, typically with limited ability to enforce decisions. The licence exists; the protections behind it do not look like the UKGC’s.

Some readers reach offshore casinos legitimately. The most common case is players whose UKGC self-exclusion has expired but who want a regulated alternative to returning to the same operators. Others reach them because the bonus structures are larger — UKGC rules cap welcome bonus terms, and offshore casinos can advertise offers that would not be permitted in the UK market. Both are real reasons.

sitelikeuk scores offshore casinos using the same four pillars as every other casino in the index, but the Trust pillar caps at 7.5 regardless of the operator’s individual record. That cap is not a punishment; it is an accurate accounting for what an offshore licence does and does not give a player. A casino that scores 7.5 with a Curaçao licence has a clean record under a lighter framework. A casino that scores 8.5 on the UKGC has a clean record under a heavier one. Those numbers are not directly comparable.

The single most miscommunicated number in iGaming is the bonus headline. A casino’s marketing page will tell you “£200 + 100 spins, 35x wagering, 14 days.” That sentence implies £200 of value. The maths underneath the sentence routinely says otherwise. Once you account for the clauses that the headline doesn’t reproduce, the same offer can resolve to anywhere between £30 and £140 of real expected value.

sitelikeuk’s bonus value scores are not casino claims. They are the output of Jon Yound’s expected-value model, which converts every published offer into a single modelled figure. The model accounts for six variables — the bonus face value, the wagering multiplier, the game-weighting table that decides which slots count for how much towards clearing the wager, the maximum bet permitted during wagering (typically £5 on UKGC operators), the time limit the player has to clear the bonus, and the RTP of the games the player is actually allowed to use the bonus on. Each of those variables can swing the modelled value by tens of pounds.

A worked example: take a “£200 + 100 spins, 35x wagering, 14 days” bonus on a UKGC operator with a standard game-weighting table. If the wagering is bonus-only, on a 96% RTP slot, with no time pressure, the modelled expected value is approximately £95. Change the wagering to deposit-and-bonus, the same offer resolves to around £35 because the player is now wagering their own deposit through as well. Change the time limit from 14 days to 7, and even patient players begin to leave value unclaimed. Restrict the bonus to a low-RTP game library (some operators only allow bonuses on slots in the 92-94% RTP band) and the modelled value drops further.

The model is rebuilt every quarter because bonus structures evolve and operators continue to invent new clauses. Jon publishes the methodology and the underlying formulae, and corrections are accepted with worked maths attached — not opinions, the maths. If the model agrees with a challenge, the score is updated and the change is logged.

This is the pillar where the headline-versus-reality gap is widest. Reading the modelled number rather than the marketing number is, on average, the largest single improvement a UK player can make in how they choose a casino.