How We Review Online Casinos in UK


At KingCasinoBonus, we review UK online casinos using a strict system created by our founder and chief editor, Ionut Catalin Marin. Our method gives you the information to raise winning odds & make informed choices.

Why Trust the King Casino Bonus Review System?

You can trust our review system because we test the casinos ourselves, using real accounts, so our reviews are informed by true player experience. While we have active financial partnerships with all the casino operators we present on our website, the monetary compensation doesn’t affect the ratings we give.

While testing the sites, we evaluate and rate according to the aspects that really affect your gameplay and winning odds, including casino security protocols, KYC processes, user experience on the platform, game selections, payment providers and transaction speed, the transparency of casino terms, loyalty programs, and the casino’s offers.

Multiple casino experts check the reviews before they are published, based on a thorough policy. They ensure we only give relevant information that is easily accessible.

Here are the resources we invest in every online casino review on our website:

  • 8 strict selection factors, evaluated and described in every review
  • 2 specialists that test and review the casino
  • 2 experts, including our chief editor, Ionut Catalin Marin, check the casino review before publication
  • 8-10 hours of testing every casino we review
  • 6-8 hours in creating and checking each casino review
  • Between £10 and £100 to test and review each casino deposit and withdrawal method, looking at payment security, speed, and limits
  • An average of £80 in checking game betting limits
  • £1 to £50 to claim the casino’s promotions and check their true value, terms, and security.

How We Test an Online Casino

  1. We research the casino’s UKGC licensing and reputation using our internal resources and specialised tools.
  2. Our team creates a live casino account to test the registration process.
  3. We verify every account to evaluate the efficiency and duration of the KYC process.
  4. We navigate the casino website on laptops, tablets and smartphones to evaluate its mobile optimisation, loading speed, and responsiveness, especially during the busiest times.
  5. Our experts check for any glitches and analyse the graphics, design and layout of the platform, to ensure you can navigate it easily.
  6. We check the number and diversity of the available games, including the reputation of the software providers on the casino website.
  7. Our team tests 10 games in every available category, to verify minimum and maximum bets, game features, and functionality.
  8. We interact with the casino’s support team through all the means available, to check how they work, how fast they respond, and how reliable they are.
  9. Our team claims multiple bonuses from each casino, including sign-up bonuses, free spins, and reload offers to assess their terms, playthrough requirements, and their true value.
  10. We analyse the withdrawal process of the casino, by cashing out different amounts and evaluating the banking options available, withdrawal processing speed, limits, and any added fees.
  11. We compare our test results to our standards. If a casino meets our standards we use all the information we collected to create accurate, comprehensive, and objective casino reviews.

When is a Casino Deemed Top?

We deem an online casino as top value for our website when it achieves a rating of 4/5 on all 8 evaluation standards.

This means that the casino must provide a high-quality experience involving its usability, payment methods and speed, customer support, loyalty program, licensing, bonus selection and game variety, specifically slots and live dealer titles.

Our experts don’t just settle for sites that meet our standards. They require a casino to exceed our expectations by delivering unique experiences or excelling at one of our rating criteria in order to list them on our best online casinos UK page.

What Happens When We Deem a Casino Bad?

When a casino is deemed bad, we don’t list it on our website and we don’t create a casino review for it, to maintain our process transparent, accurate, and objective:

  • Our reviews are objective, so your needs are the only factors that influence our casino recommendations.
  • Our reviews are accurate, so we cannot recommend a casino that we deem unsafe or unsatisfactory through our rating system.
  • We remain transparent in our reviews, so we point out every negative aspect, even in the casinos that make it through our selection process.

We explain more in-depth why we choose to adhere to these principles in our editorial policy.

Types of Reviews We Create

We create two types of reviews: individual casino reviews and collective reviews of casino categories.

In individual casino reviews, we provide in-depth evaluations of one single casino and the specific payment policy, the type of security granted by the casino, the particular games available, its offers, assistance and usability on multiple devices. While these reviews also compare the casino with its competitors, the focus remains on what the site offers to UK players.

Our casino category reviews provide information about the sites that meet your specific preferences in gambling.

For instance, we list together casinos with low minimum deposits, sites that provide the top titles for a game category, such as the best slots sites, and other categories that cater to your specific areas of interest.

These types of reviews by category aim to help you find the most suitable casinos for your specific needs.

Rating the Best Online Casinos in UK

We score the best online casinos in the UK based on an 8-factor standard system. Our experts calculate a score between 3 and 5 according to how many of our requirements the casino meets for a specific factor, like bonus selection or payments.

Casinos that score 5 in any of the areas we evaluate meet all of our quality standards for that specific factor.

We don’t list casinos that score less than 3 on any of the 8 evaluation factors.

Our Scoring System Bonuses Look & Feel Slot Games Live Casino Games Payout Speed Customer Support Loyalty
3/5 One promotion type Slow-loading, glitches,

not mobile optimized, confusing navigation

Max 300 slots, max 3 providers, 1-2 Slot types available Max 50 games, max 2 providers,

2-3 game types

+5 working days 1 assistance mode, not 24/7, chatbots No loyalty programme, no loyalty benefits
3/5  to 3.5/5 +2 promotion types, high wagering Slow-loading, glitches, intuitive navigation, optimised for mobile browser 300-500 slots, 5 providers, 3 Slot types available 50-80 games, 3 providers,

4 game types

3-5 working days 2 assistance modes, not 24/7, chatbots Invite-only loyalty programme, 1-2 loyalty benefits
3.5/5 to 4/10 +3 promotion types, high wagering Average loading, no glitches, intuitive navigation, optimised for mobile browser 300-500 slots, 7 providers, 4 Slot types available,

limited bets

50-80 games, 4 providers,

+4 game types, limited bets

3 working days 2 assistance modes, not 24/7, human assistants Invite-only loyalty programme, +3 loyalty benefits
4/5 to 4.5/5 +3 promotion types, varied wagering Fast loading, no glitches, intuitive navigation, optimised for mobile browser, 1 desktop/ mobile app 500-700 slots, 7 providers, +4 Slot types available,

limited bets

80-100 games, 4 providers,

+4 game types, limited bets

2 working days 3 assistance modes, not 24/7, human assistants Tiered loyalty programme, +3 loyalty benefits
4.5/5 to 5/5 +4 promotion types, low wagering Fast loading, no glitches, intuitive navigation, optimised for mobile browser, +2 desktop/ mobile apps +700 slots, 7 providers, +4 Slot types available,

flexible bets

+100 games, +4 providers,

+4 game types, flexible bets



+3 assistance modes, 24/7, human assistants Tiered loyalty programme, +3 loyalty benefits, Comp points available


Whenever our experts test and rate the bonus section of a British online casino, we redeem as many promotional offers as possible. We generally only deposit the minimum required amount, usually £10, so we can redeem multiple deals. We test the eligible games, complete the wagering requirements and request payouts of the promotional winnings to clearly formulate our opinions on which British punters would find the promotions suitable.

Look & Feel

To properly examine the interface of each UK gambling site, we explore the platform from different devices, including desktops and Android and iOS phones. Our experts appreciate and give better ratings to online casinos that offer British punters intuitive and modern interfaces, with many navigation options like search bars and advanced filters for the game collections. We also consider a must for the registration, KYC and banking processes to be straightforward.

Slot Games

When ranking the slot collection of a UK online casino, our experts are extremely thorough in checking all the bet ranges, game variety and the software providers backing up the website. We place wagers ranging from £0.10 to £100, and our experts try classic, video, megaways and jackpot slots. For a high score, a UK gambling site must offer British users games from at least 7 premium developers and have 700+ titles.

Live Casino Games

To offer a British online gambling site a good rating for this section, our experts consider that their live casino collections need 40+ top games that cover at least the 4 main types of live games: roulette, blackjack, baccarat and poker. Furthermore, we ensure the live dealer catalogue has as many top suppliers as possible, but an online casino operator needs at least 2+ premium live game developers for a maximum score.

Payout Speed

Our expert casino reviewers put great importance on testing the banking sections of each UK online casino we present. To ensure we provide accurate information to British readers, we test multiple of the available payment options, including debit cards, e-wallets, prepaid cards and, when available, pay-by-phone methods. Afterwards, we ensure the withdrawal limits and processing time advertised by the website are correct. For high ratings on this section, the deposit and withdrawal limits need to be £10 or lower, the operator must allow debit cards and e-wallets at least, and the payout processing times of under 24 hours.

Customer Service

Our team offers high ratings for the customer support section only when British online casinos offer you all 3 support channels: email, live chat and phone. During our testing, we place multiple queries that range from banking, registration and KYC processes and game-related issues. Another factor that is highly appreciated by our team is the 24/7 availability of either live chat or phone support.


Whenever our KingCasinoBonus experts encounter British gambling sites with VIP programmes or loyalty benefits, we extend our testing period until we achieve at least the second reward tier. We usually need to wager at least £200 to reach that goal, and we appreciate when casino operators offer benefits like personalised bonus offers, personal account managers, more fitting deposit and withdrawal limits and quicker cashout processing times.


The most important aspect that our KingCasinoBonus experts focus on is the licensing of a casino. We don’t partner with or review any UK online casinos that don’t have a valid UKGC license. We also ensure that the gambling sites we present British readers don’t have any suspensions or fines for not respecting the regulations. Furthermore, for this category, the maximum rating is only achieved by operators who partner with industry watchdogs like eCogra and iTechLabs to offer you the safest and most trustworthy experience possible.

Why We Only List UKGC-Approved Casinos

We only list UKGC-licensed online casinos because a casino can only receive and maintain its UK Gambling Commission licence if it is trustworthy and if it adheres to rules that protect UK players.

To be licensed by the UK Gambling Commission, casinos must promote responsible gambling, help struggling players, offer transparent terms, fair games, safe transactions, and a high level of player data security, among other important aspects.

And the UK Gambling Commission performs regular checks to make sure that these rules are respected.

Essentially, the UKGC licence is a guarantee that the casinos you find on KingCasinoBonus are legitimate and safe.

Selecting Top UK Online Casinos by Type

We select the top UK online casinos based on the type of player requirements that they meet best. Our chief editor and main expert, Ionut Catalin Marin, personally verifies the selection process of online casinos by type of player and category.

These are the most common categories by which we select top-performing UK casinos:

By reputation

When selecting the online casinos with the best reputation, we first make sure they are licensed by the UKGC. Then, we ensure they apply top security encryptions to protect your data and funds.

We also look for game fairness certifications from independent auditors, as is the case with eCOGRA casinos, and consider the amount of time in which they’ve maintained a positive reputation in the industry.

By game software providers

We choose the sites with top titles from the industry’s most reputable providers. When creating specialised lists of Netent casinos or Playtech casino selections, we also look at betting limits, game features, and how many new titles from a specific provider you can access.

By payment methods

When we pick the top casinos for specific payment methods, like our Visa casinos list and Mastercard casinos selection, we make sure their payment policies also make your Visa or Mastercard transactions easy and convenient.

With top casinos that accept Neteller and our Skrill casino listing, we also check if you can access bonuses and other benefits by depositing with these methods.

By the provided sign-up bonuses

Our experts select and constantly update our top UK casinos that offer the best sign-up casino bonuses list with sites where you can find multiple sign-up options, like no deposit required offers, free spins on registration, and welcome packages.

We consider these bonuses the best because they have low wagering requirements, and high value.

How to Use Our Expert Verdicts and Comparisons

  1. Go to the end of each review section to find our experts’ verdicts. These are short paragraphs in which we conclude our analysis about a casino’s bonus selection, slot games list, and each of the other rating standards.
  2. Look for the advantages and disadvantages that we point out in our verdicts to get an accurate perspective of the reviewed casino section.
  3. Pay attention to the recommendations provided by our experts in these verdicts. We give free professional guidance on how to overcome specific issues or what details to take into account.
  4. Go to the end of the casino review to find our overall verdict about a casino. This will give you a balanced picture of the site’s main strengths and weaknesses.
  5. Complete the information you receive in our verdicts with our comparison tables at the beginning of our casino reviews and in the payments section. These comparisons show you how the site performs next to other similar websites.
  6. Use our comparisons to find alternative casinos that meet your needs and preferences better.

King Casino Bonus: Your Reliable Source of UK Casino Reviews

Ionut Catalin Marin advises you to use KingCasinoBonus as your reliable source for casino reviews because it provides all the essential information in a simple format, so you can make informed and safe decisions based on your preferences.

Our unbiased casino reviews are created after extensive research, first-hand experience of the casino with the help of live accounts, and thorough examination of our industry specialists. We design every review to get you the important facts quickly and to highlight possible issues, essential advice, and suitable alternatives.

With the casino reviews on our website, it takes seconds to get the latest updates on a specific site, expert verdicts and evaluations, and extensive data to inform your decisions, raise your odds and improve your gaming experience.

Real User Reviews – Tell Us Your Experience

Since we are committed to offering you the best possible information about the UK online casinos, we want you to tell us about your experience with the gambling sites you play on. We will use your opinions to calculate the final rating of each operator we examine. Our team encourages you even to tell us if we missed something you find important or interesting so we can improve and give you the most complete analysis of your favourite online casinos.

You can submit your experience and opinions in the dedicated sections of our review pages.