How We Rate Casinos: Our Casino Review Criteria and Weightings Explained

Peter Wilson
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Knowing how we rate casinos is essential for making informed decisions about where to play. That’s why we review the strengths and weaknesses of online casinos using a comprehensive set of criteria.

Testing, testing, testing is our mantra at GamblingAuthority. We examine every minute detail to provide the most complete online casino reviews. Each of these review criteria is covered below…

Why Trust GamblingAuthority Reviews?

Before we get to the criteria, it’s important to ask why you should trust us. First, our team has over 25 years combined in the industry. Second, we spend countless hours reviewing tiny details to provide the most extensive casino assessments. Third, we regularly update our reviews to ensure they include the latest information about each casino.

Lastly, we’re not afraid to call out casinos that should be avoided, reveal bad practices, or point out areas needing improvement. Our reviews never pull punches; we always tell it how it is. We want you to return, and we know that won’t happen if we aren’t 100% honest.

GamblingAuthority has reviewed hundreds of casinos since launching in 2022!

Please visit our Casino Reviews page to see all the sites we’ve evaluated. We also constantly add new casinos, so check back regularly for our latest reviews and updates.

For more general information about GamblingAuthority, please visit our About Us page. Or, to read more about our writers, editors, and fact-checkers, please refer to our Authors page.

How We Rate Casinos: Our Review Criteria

Below is a comprehensive list of criteria we rigorously apply to determine whether an online casino deserves top marks. This list covers every significant factor impacting player experience, trustworthiness, and overall quality compared to other online casinos in the UK.

The GamblingAuthority review criteria is broken down by percentage weighting on a pie chart

Review Criteria Overall Weighting
Casino Bonuses 15%
Games Selection 15%
Payment Methods 15%
Licensing & Regulation 15%
Safety & Security 10%
Responsible Gambling 10%
Customer Support 10%
Company Ownership & Reputation 5%
User Experience & Site Design 5%

Casino Bonuses (15% Weighting)

Bonuses can make or break your first impression of an online casino. This is especially true if you’re a newcomer looking for extra playing funds to get started. We look beyond the impressive numbers to see how fair and straightforward these offers are for new and experienced players.

Sign Up Bonus

When you first arrive at a casino, the sign-up bonus often catches your eye: “100% up to £500! Get it now!” But does it live up to the hype? Or are things too good to be true?

  • What We Look For: We want a decent match percentage (the higher, the better), clearly stated terms about how much you need to deposit and fair wagering requirements (the lower, the better). We also like a user-friendly opt-in process—no complicated hoops to jump through.
  • Good Practice Example: A casino might offer a 100% match bonus of up to £200 with a simple 35x wagering requirement. You deposit £50 and instantly see another £50 credited to your bonus balance. You should also be able to track your wagering progress easily. The terms are easy to find and clearly explained, and no sneaky restrictions appear at the last minute.
  • Bad Practice Example: A site advertises a giant 500% bonus but buries a 65x wagering requirement in the fine print. You only discover that you’re limited to £2 max bets on slots, table games are restricted from bonus wagering, and you can’t play high-RTP slots after you’ve deposited. We consider that a red flag.

Good and bad bonuses are compared on a chart showing common examples

Free Spins

  • Overview: Free spins can be a fun way to explore a casino’s slot selection without risking too much of your own money.
  • Real-World Testing: We look at the value (i.e. if a free spin is worth 1p or 20p), how many free spins are given, and which slots they’re valid for. A good casino will let you use them on popular or newly released games rather than obscure titles with poor RTP.
  • Warning Sign: If a super high wagering requirement is explicitly tied to free spins or an ultra-low maximum win cap (like £50 max from free spins), that’s a sign they might be more a marketing gimmick than a genuine perk.

No Deposit Bonuses

  • Overview: A no deposit bonus is basically “try before you buy”—you get free credit just for signing up. But these are often heavily restricted, so you must check the T&Cs.
  • Good vs Bad: We love seeing a no deposit offer with fair wagering and a reasonable max cashout. But we sometimes encounter “traps” where the wagering is so high that converting the bonus into real winnings is practically impossible.

Cashback

  • Overview: Casino cashback deals refund a small percentage of your net losses over a set period (daily, weekly, or monthly). Think of it like a safety net against bad luck.
  • What We Like: A straightforward percentage—e.g., “10% weekly cashback up to £100”—with minimal strings attached. The simpler, the better.
  • Pitfalls: If a casino advertises “30% cashback” but only on net losses on specific weekdays, or only if you have lost on live roulette, and only if you’ve deposited three times that week, the offer quickly loses its sheen. The casino score will be downranked according to how many restrictive terms are applied to the bonus.

Loyalty Program

Loyalty programs (or VIP promotions) keep existing players happy with rewards, points, or extra perks. They often involve tiers (Bronze, Silver, Gold, etc.).

  • Criteria: We assess how quickly you can level up and what benefits each tier offers (e.g., higher withdrawal limits, personal account manager, birthday bonuses). We also check whether the progression system is transparent or if progress is almost impossible.
  • Good Practice Example: A points-based system that clearly outlines “1 point per £10 wagered” or similar. You see genuine improvements once you reach a new tier—like bigger bonuses or invitations to exclusive tournaments.
  • Bad Practice Example: A nebulous VIP scheme that never explains how you earn points or how the casino calculates your status. You might get an email claiming you’re a VIP, but no official page explains the perks.

Promotions for Existing Players

Casinos shouldn’t forget about their existing players after they claim the welcome offer. Ongoing promos—reload bonuses, free spins, slot tournaments—keep things interesting.

  • Variety & Frequency: We check how often promos appear for existing customers. Do you get a weekly reload bonus? Occasional prize draws? Big-money slots tournaments? The more, the merrier.
  • Pitfalls: Some casinos overdo the small print, meaning you might qualify for a reload bonus but face a short time window (24 hours) to use it, or you can’t bet more than £2 per spin while it’s active. Many leaderboard promotions also heavily favour high-rollers.

Wagering Requirements

Wagering is where the rubber meets the road on any bonus. A 200% bonus with 20x wagering is better than a 400% bonus with 60x wagering.

  • Clarity is Key: We love it when the casino’s bonus page says, “You must wager your deposit + bonus amount 35 times within 14 days.”
  • High vs Low: Anything above 50x deposit + bonus starts to feel punishing. We understand not every casino can offer ultra-low wagering, but we expect transparency.
  • Real-World Examples: If we deposit £50, receive a £50 bonus, and the requirement is 35x the bonus (i.e., 35x £50 = £1,750), we expect that to be clearly stated before we hit “Deposit.”

High (50x) and Low (35x) is compared in a chart

Other Bonus Terms

Plenty of “small print” can lurk behind bonuses—max bets, excluded games, or time limits. We dig into these so you’re not caught out after making a real money deposit.

  • Good Practice: In bold text, the casino lists maximum bet amounts (like £5 or £6.50) during bonus play. This ensures you can’t miss it.
  • Bad Practice: The T&Cs are buried three pages deep, using complex legal jargon or referencing disclaimers that force you to click multiple links.

Games Selection (15% Weighting)

Variety is the spice of life, and that’s no different in online gambling. The best-rated casinos keep your options fresh and cater to many tastes, from slot enthusiasts to live casino die-hards.

Number of Games

New Releases

Range of Categories

Exclusive Games

Filtering and Search

An efficient and accurate search for Jackpot Games reveals only those types of games

Quality of Suppliers

Independent Testing

Payment Methods (15% Weighting)

Convenient banking methods and fair payout procedures are cornerstones of a good casino experience. You shouldn’t have to jump through hoops or wait forever to get your winnings.

Deposit Methods

  • What We Look For: Visa, Mastercard, e-wallets (PayPal, Skrill, Neteller), prepaid vouchers (Paysafecard), bank transfers, and region-specific solutions.
  • Example of Good Practice: A casino that supports various methods with no hidden fees and instantly processes deposits.
  • Example of Bad Practice: Limited deposit methods that force players to use high-fee services, with slow or incomplete deposit confirmations.

Deposit Limits

  • Clarity: We want the minimum and maximum deposit amounts clearly stated. Some casinos hide these limits until you’re at the cashier page, which can be frustrating.
  • Our Method: We try depositing different amounts to confirm that the stated limits match the actual system.

Bonus Eligibility

  • Caveat: Some casinos exclude e-wallet deposits (like Neteller or Skrill) from bonus eligibility, which can be a rude surprise. We always double-check this and report our findings.
  • Real-Life Checks: We ensure we can still claim the welcome bonus if we deposit using our preferred method. If it’s excluded, we will note whether this is disclosed upfront.

Withdrawal Methods

  • One-Wallet Policy: Many casinos require you to withdraw using the same method you used to deposit—this is for anti-money-laundering reasons.
  • What We Expect: There should be enough withdrawal options so that users are not forced into a single route (e.g., bank transfer) that might have extra fees or longer wait times.

 Withdrawal Times

  • Importance: One of players' most significant pain points is waiting too long for a cashout. A processing time of 24-48 hours is standard.
  • Red Flag: Some casinos stall withdrawals for a week or more or place arbitrary “pending” periods to pressure you into cancelling your withdrawal and gambling more.

Withdrawal Fees

  • User Unfriendly: We dislike any charges for withdrawing money. However, a small fee might be acceptable if clearly mentioned (e.g., a £5 charge for bank transfers under £100).
  • What We Test: We withdraw small and more significant amounts to see if any “surprise” fees that weren’t spelt out beforehand appear.

Cryptocurrencies

  • Growing Trend: Many players appreciate the anonymity and speed of Bitcoin, Ethereum, or other altcoins. However, the UKGC currently does not license any crypto casinos.
  • Good Crypto Casinos: Instant or near-instant transactions, minimal fees, and real-time exchange rates displayed.
  • Possible Issues: Unclear or volatile conversion rates or minimal KYC checks that could raise a red flag with regulators.

Licensing and Regulation (15% Weighting)

Licenses matter because casinos operate under specific rules designed to protect players. A reputable license is your ticket to a fair gaming environment.

Reputable License(s)

Verified Certificates

License Breaches

All reputable casinos show the full license number in the footer

Safety and Security (10% Weighting)

Sharing your personal and financial details online requires trust. We examine how casinos protect your data, handle account verifications, and separate player funds.

SSL/TLS Encryption

  • Non-Negotiable: Any online platform handling transactions must use secure encryption (ideally 128-bit or 256-bit). Also, TLS is more robust than the rather old-school SSL.
  • Test It Yourself: Click the padlock icon in your browser—if the security certificate is valid and up to date, that’s a good start. Always ensure the URL begins with HTTPS.

Data Protection Policies

  • Privacy is Key: We read the privacy policy to see if they store or share your data with third parties. Under GDPR (in many regions), they must inform you.
  • User Experience: We check whether they mention how cookies are used and whether they provide an easy way to opt out of marketing communications.

The KYC Process

  • What to Expect: Upload proof of ID, address verification, and possibly a copy of the payment method. This is standard in regulated online casinos.
  • Good vs Bad: A good operator identifies and verifies the required documents quickly (1-2 days max). A bad one repeatedly requests new forms of ID and delays withdrawals indefinitely, hoping you’ll give up.

Source of Wealth

  • High Rollers: If you deposit large amounts, the casino may ask for extra documents. This is normal when complying with anti-money laundering laws.
  • Warning: We consider it questionable if they ask for unreasonable or overly invasive documents without explanation. You have been warned!

Separate Player Funds

  • Why It Matters: If the casino faces financial issues, player balances should be protected. Some regulators require segregated accounts specifically for player deposits and winnings.
  • Verification: A strong licensing body typically enforces this rule. We also look for the casino’s statement on storing player funds.

Responsible Gambling (10% Weighting)

Gambling should be fun, not destructive to your mental and financial health. The best-rated casinos offer practical responsible gambling tools to help you stay in control.

Deposit and Spending Limits

Self-Exclusion and Cool-Off Periods

Reality Checks

Links to Support Organisations

Licensed casinos should show their full license information in the footer of the site

Customer Support (10% Weighting)

When things go wrong, or you have a quick question, a helpful support team is reassuring.

Availability

  • Round-the-Clock? We prefer 24/7 support. If the opening hours are clearly stated, anything less is workable. However, it can be frustrating if you need help at midnight and they’re closed until morning.
  • Testing It: We intentionally contact support at different times, including weekends, to see if the “24/7” claim holds up.

Channels

  • Why It Matters: Different people have different preferences—live chat for speed, email for detailed queries, phone for a personal touch.
  • Good Practice: Offering multiple options, including a WhatsApp or social media channel if they’re forward-thinking.

Professionalism

  • Reading the Room: Polite, well-informed agents should address you by name and provide coherent answers.
  • Red Flag: If they give canned responses or fail to read your question correctly, you may go in circles, especially if they copy-paste from a script. AI chatbots are even worse!

Response Times

  • Expectations: Replies to live chat messages should be near-instant or within a minute or two. Email replies might take 24 hours, but any longer, and they start to feel unprofessional.
  • Real-World Example: We’ll ask a complex question about bonus terms and time how long it takes for them to answer, escalate or consult a supervisor.

Comprehensive FAQs

  • Why They Matter: A well-written FAQ helps you solve common issues—like resetting your password or verifying your account—without contacting support.
  • We Test It: We try to find answers in the FAQ before we ask for support. If it’s thorough and up to date, we will give extra credit.

Company Ownership and Reputation (5% Weighting)

The people behind the curtain matter. A casino’s reputation is shaped by its parent company’s ethics, track record, and approach to player satisfaction.

Transparent Ownership

Established History

Sister Sites

No Predatory Advertising

Conflict Resolution

User Experience and Site Design (5% Weighting)

Finally, aesthetics and usability. A clunky interface can ruin your fun even if a casino has the best bonuses and games. We explore design, speed, mobile compatibility, and more.

Overall Design

  • Clean & Intuitive: Menus that make sense, minimal pop-ups, and well-labelled categories so you can find what you want fast.
  • Our Test: We basically “live” on the site for a while, navigating different pages and noting anything awkward, broken, or unexpected.

Mobile Compatibility

  • Modern Must-Have: With so many players using smartphones and tablets, a casino must work seamlessly on smaller screens.
  • Native Apps vs Browser: We try both if they are available. Some casinos have great browser-optimised mobile sites but lacklustre native apps (and vice versa).

A selection of games on a mobile device

Localisation

  • Language Options: Multi-lingual support is a big plus, especially if you’re uncomfortable reading terms in English.
  • Cultural Relevance: Localised payment options or promotions themed around local holidays can make overseas players feel at home.

Accessibility

  • Inclusivity Matters: Offering text resizing, high contrast modes, or compatibility with screen readers helps players with disabilities.
  • What We Do: We test the site using standard accessibility tools or screen readers to determine whether essential features remain usable.

Interactivity

  • Beyond Basic Gameplay: Tournaments, missions, loyalty “quests,” or leaderboards can spice up the gambling experience.
  • We Participate: If there’s a slot tournament, we’ll join and note whether the rules are clearly stated, whether the leaderboard updates in real-time, and whether prizes are awarded promptly.

Feedback From Players

  • Community Insight: We frequent gambling forums and social media groups to see if players rave or rant about the site’s interface and overall vibe.
  • Cross-Checking Claims: If players complain about site crashes, we’ll try to replicate those conditions ourselves.

Key Takeaways: How We Rate Casinos

  1. Trust and Expertise Matter: GamblingAuthority boasts over 25 years of industry experience and regularly offers unbiased, detailed reviews to ensure accuracy and relevance.
  2. Comprehensive Review Criteria: Each casino is evaluated against 9+ key factors, from bonuses and game selection to licensing, security, and customer support.
  3. Transparency: GamblingAuthority isn’t afraid to call out bad practices, misleading advertising, or unfair bonus terms to protect players from rogue casinos.
  4. Bonuses and Promotions: Casinos are assessed on their sign-up bonuses, free spins, cashback offers, and loyalty programmes, focusing on fairness, transparency, and reasonable wagering requirements.
  5. Game Selection and Quality: The best casinos feature thousands of games across multiple categories, exclusive titles, and partnerships with reputable providers like NetEnt and Microgaming.
  6. Fast and Secure Payments: Deposit and withdrawal options are tested for speed, transparency, and reliability, with preference given to casinos offering instant or near-instant payouts. Hidden fees are flagged.
  7. Licensing and Regulation: Casinos must hold reputable licences (e.g., UKGC, MGA) and display verifiable certifications to ensure a safe and fair gaming environment.
  8. Responsible Gambling Commitment: High-rated casinos offer tools like deposit limits, self-exclusion options, and reality checks while partnering with responsible gambling organisations like GamCare.
  9. Customer Support Excellence: Round-the-clock support via live chat, email, or phone is a must, with casinos rated on response times, professionalism, and the clarity of their FAQs.
  10. Player-Centric Approach: GamblingAuthority prioritises user experience, ensuring casinos offer mobile-friendly designs, accessibility options, and clear, localised payment methods and terms.

Transparent Reviews Backed by Data

There you have it. We've now covered precisely how we rate casinos. When assessing an online casino, we systematically apply all the review criteria listed above. This ensures we provide a comprehensive, balanced, and honest assessment of each site.

We always start with the non-negotiables, such as licensing, security, and responsible gambling. Once we’re satisfied that the casino is safe, we consider the quality enhancers, such as a wide game selection, generous bonuses, fair T&Cs, fast payouts, and top-tier customer support.

Only the best online casinos meet our exceptionally high standards with minimal flaws. In contrast, lesser-rated casinos may falter in crucial categories like payout speeds, transparency, or customer support responsiveness. We also have no issue with calling out rogue casinos and their dodgy practices, which is essential for making informed decisions.

By assessing a casino in each area, you will understand how trustworthy, user-friendly, and enjoyable a platform is before deciding where to play.

How We Rate Casinos FAQ

Yes. Although we earn a small commission from affiliate links, we are committed to being honest, independent, and free from bias. The online casinos featured on our site have no say in our editorial content. Absolute honesty is the best policy.

We always mention a casino's licenses in our reviews. However, if you wish to verify this information, go to the footer of the online casino and look for the license logo. Clicking the logo should take you to the licence certificate.

We send questions to the team via live chat and email to see what they're made of. We do this for several reasons. In addition to wanting 24-hour support, we want to test their response times, professionalism, and knowledge of online casinos.

Yes. While testing a casino, we make several deposits to play the games and accept bonuses. Likewise, we record the payout speed for several payment methods to ensure that what they advertise is true in a real-world scenario.

Third-party organisations like eCOGRA and iTech Labs should independently test all casino games. To ensure that a casino offers fair games, look for the logos of testing agencies in the site’s footer. Never play at casinos with untested games.

Some casinos offer the best RTP for each game, while others drop it to the lowest possible setting to maximise profits. To check the RTP of a game at a specific casino, go to the info or paytable section within the game. You should find the RTP and volatility displayed. If not, contact the customer support team to find out more. To understand why RTPs differ at each casino, read our guide to RTP variables.

We carefully examine the terms and conditions of bonuses, such as wagering requirements, max cashout limits, and game restrictions, to determine if they are fair and achievable for the average player.

An excellent user interface is intuitive, fast, and accessible across all devices. We look for clean navigation, responsive mobile design, and helpful filtering or search features to enhance the player experience.

Yes, we test browser-based mobile casinos and dedicated apps for ease of use, compatibility, speed, and whether all key features (e.g., payments and games) are fully functional.

We analyse feedback from forums, social media, and independent review sites to identify recurring issues or highlights. If a casino consistently ignores player concerns, it impacts its score.

Absolutely. We evaluate daily and monthly withdrawal limits to ensure they are reasonable for all player types, especially high rollers. Casinos with overly restrictive limits lose points.

Peter Wilson
Peter Wilson Editor-in-Chief
81 Articles 23 Reviews

Peter Wilson is the Editor-in-Chief at GamblingAuthority. He has more than nine years of experience from the iGaming industry and is a valuable resource for everything related to online casinos.

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Last Updated: 21 February 2025