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How We Rate Casinos

James Whitford
Updated June 15, 2026 · 6 min read
Fact checked by James Whitford

How VaultSpins Rates Non GamStop Online Casinos Finding a trustworthy non GamStop casino isn’t always straightforward. The offshore market is crowded, standards vary wildly, and it can be genuinely difficult to know which sites deserve your time and money. That’s exactly why we built a structured, transparent rating system at VaultSpins one designed specifically for UK […]

How VaultSpins Rates Non GamStop Online Casinos

Finding a trustworthy non GamStop casino isn’t always straightforward. The offshore market is crowded, standards vary wildly, and it can be genuinely difficult to know which sites deserve your time and money. That’s exactly why we built a structured, transparent rating system at VaultSpins one designed specifically for UK players who are looking beyond UKGC licensed platforms.

Here’s a full breakdown of how we evaluate casinos, what we actually test, and why each factor matters.

Our Rating Criteria

We score every casino across seven categories, each weighted to reflect how much it really matters to players.

1. Safety, Licensing & Dispute Resolution 25%

This carries the most weight because everything else depends on it. We check for active licences from recognised offshore regulators, including Curacao GCB, LOK, MGA, Anjouan, and Kahnawake. Licence numbers are looked up directly we don’t just take a casino’s word for it.

We also acknowledge the reality of playing at offshore sites: UKGC protections don’t apply here. So we look closely at what alternative dispute resolution options exist, whether that’s a licensing body’s complaints process or a third party mediator. It’s not a perfect substitute, but knowing your options matters.

2. Withdrawal Speeds & Fairness 20%

Slow or complicated withdrawals are one of the most common frustrations players report, so this gets significant weight. We make real deposits, request actual withdrawals, and go through the KYC verification process ourselves to see how it feels from a player’s perspective.

We pay particular attention to how quickly funds arrive, but also to withdrawal caps. A casino might advertise a huge jackpot while quietly limiting how much you can withdraw per week that’s the kind of detail that deserves scrutiny.

3. Bonus Terms & Promotions 15%

A generous looking bonus can still be a poor deal if the wagering requirements are unrealistic or the maximum conversion is capped too low. We read the fine print so you don’t have to.

Non GamStop casinos often offer features like bonus buy slots that aren’t available on UK regulated sites. We treat these as a legitimate part of the product, while still flagging any terms that seem unusually restrictive or misleading.

4. Games Portfolio & RTP Transparency 15%

We look at both the breadth of the games library and the quality of the providers behind it. But we also dig into something that often gets overlooked: RTP (Return to Player) figures, and whether they’re clearly published.

Some offshore casinos operate games with configurable RTPs meaning the house edge can be adjusted. We check whether the casino is upfront about this and whether the RTP figures on display are accurate. For a deeper explanation of how RTP works and which slots offer the best returns, see our dedicated pages on RTP explained and high RTP slots.

5. Payment Methods & Processing 10%

We assess the range of payment options available cards, e wallets, crypto, and so on along with any transaction fees and how quickly deposits and withdrawals actually process. We also consider the reputation of the payment processors involved, since this can affect both speed and security.

6. Customer Support & User Experience 10%

We test support directly by contacting the team via live chat, email, and phone where available. Response times, accuracy of answers, and general helpfulness all factor into the score.

Beyond support, we look at the overall experience of using the site how easy it is to navigate, how well it works on mobile, and whether the design holds up across different devices.

7. Reputation & Longevity 5%

A casino’s track record tells you something, even if it’s not the whole story. We look at player reviews on Trustpilot and AskGamblers, paying particular attention to how complaints have been handled. We also consider how long the casino has been operating a consistent payout history over several years is a reasonable indicator of reliability.

How We Actually Test Casinos

Every review follows the same hands on process. Here’s what that looks like in practice:

  1. Licence verification We check the casino’s regulatory status before anything else, confirming that licences are real and currently active.
  2. Account creation We sign up as a regular player and go through the full KYC process, including document submission.
  3. Real money deposit and bonus claiming We fund the account and claim any available welcome offer to test how the bonus is applied and whether the terms match what was advertised.
  4. Gameplay and RTP checks We play a selection of games and cross reference the published RTP figures against the game providers’ own data sheets.
  5. Withdrawal testing We request a withdrawal and track the full process from submission to funds received.
  6. Customer support evaluation We contact support with specific questions to assess response quality and speed.
  7. Final scoring All findings are combined into a weighted overall score, along with a written summary of what we found.

Common Questions About Casino Ratings

How do you rate online casinos?
We use the seven criteria framework described above, weighting each category based on how directly it affects your experience as a player. Every casino goes through the same hands on testing process.

What does 96% RTP mean?
RTP stands for Return to Player. A 96% RTP means that, on average, a game returns £96 for every £100 wagered over a large number of spins. It’s a theoretical average, not a guarantee of what you’ll win in any single session. For more detail, visit our RTP explained page.

How do VIP and loyalty ratings work at casinos?
That’s a separate system operated by the casinos themselves, usually based on your wagering activity. It’s independent of our review ratings.

A Note on Responsible Gambling

Non GamStop casinos are not covered by the UKGC’s self exclusion scheme. If you’ve registered with GamStop, that exclusion will not be recognised by offshore casinos. Please keep this in mind.

Gambling should always be approached as entertainment, not as a way to make money. It carries real risks and can become harmful. If you’re concerned about your gambling, please reach out for support:

  • GamCare
  • BeGambleAware

All casinos we review are also assessed for the quality of their responsible gambling tools, including deposit limits, cooling off periods, and self exclusion options.

Gambling is strictly for adults aged 18 and over.

Final Thoughts

Our goal at VaultSpins is simple: give UK players the information they need to make informed decisions about non GamStop casinos. That means being honest about what offshore licensing does and doesn’t provide, testing every casino the way a real player would, and explaining our reasoning clearly.

If you have questions about how we rate a specific casino or want to understand our methodology in more detail, feel free to get in touch.

author avatar
James Whitford Senior Casino Reviewer & Editor
James has spent over a decade reviewing online casinos, with a focus on offshore operators serving UK players. He leads VaultSpins' editorial standards and personally tests every casino reviewed on the site.