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Every betting site rating on caughtoffside.com comes from the same eight criteria, scored the same way and weighted the same way, so you can check a number rather than take it on trust. That consistency sits at the centre of how we review: a big name gets no special scale and a newcomer gets no easier one. What follows runs from the scoring sums to what happens when a site lets you down.
The Scope of a Betting Site Review
A review covers identical ground whether the operator is one of the UK-licensed sites or one of the sites not on GamStop, the national self-exclusion scheme. Which kind it is gets stated near the top, before any score, because it changes the protection you have if something goes wrong.
A review exists to help you compare, not to push you towards a site. The ratings decide which operators appear in our guide to the best betting sites UK, so the scoring has to hold up for every entry.
Our Rating Criteria and Weights
There are eight criteria, each scored from 0 to 5, with fixed weights that add up to 100%.
- Licensing and security (25%): whether the licence checks out and how account and payment data is protected.
- Odds and margins (20%): how much a bookmaker builds into its prices, on headline events and on quieter fixtures.
- Sports and betting markets (15%): the depth of the sports list and the bet types available across it.
- Payments and withdrawals (15%): the methods offered, their limits and how quickly money comes back out.
- Responsible gambling tools (10%): the controls you can set on your own account.
- Offers and their terms (5%): whether promotions stay fair once the small print is read.
- Mobile site and app (5%): how well betting works on a phone.
- Customer support (5%): the channels, the hours and the quality of the answers.
Licensing and security carry a quarter of the total because everything else depends on them: sharp prices are worth nothing if no regulator stands behind the site or your card details leak.
How the Final Rating Is Worked Out
Each criterion gets its own score from 0 to 5. Those eight scores are then combined into a weighted average, which means each one counts in proportion to its weight rather than equally.
Take a site with these scores, with each one’s contribution in brackets:
- Licensing and security 4 (4 × 25% \= 1.0)
- Odds and margins 3.5 (0.7)
- Sports and markets 4 (0.6)
- Payments 3 (0.45)
- Responsible gambling 4.5 (0.45)
- Offers 3, mobile 4, support 3 (0.15, 0.2 and 0.15)
The contributions add up to 3.7, shown out of 5 to one decimal place. A site needs at least 3.5 to be recommended, so this one clears the bar, though not by much.
The weights also stop a strong area from hiding a weak one. A perfect 5 for offers adds only 0.25 to the total. A drop of 2 points in licensing takes away half a point. A bookmaker with a busy promotions page and shaky payments will not drift over 3.5 on the strength of its marketing.
What We Check in Each Area
The weights set how much each area counts. The checks below decide where a site lands within it.
Licence Checks and Security
Licence verification means matching the licence number a site displays against the issuing regulator’s public register. A number in the footer proves nothing until it matches. SSL encryption, which scrambles data between your device and the site, has to cover every login and payment page.
How We Review Odds and Markets
The margin, also called the overround, is the bookmaker’s built-in edge: the amount by which a market’s implied probabilities add up to more than 100%. A two-way market priced at 1.90 each side carries about 5%, and a lower figure means more of each stake comes back over time. Market depth is judged across the sporting calendar. That includes in-play betting (bets placed while the event is running), cash out (settling a bet early at a price the operator sets) and bet builder (several selections from one event combined into a single bet).
Payments, Support and Safer Play
Withdrawal time, the gap between requesting a payout and receiving it, is read from the terms alongside methods and limits. KYC checks (know your customer: proof of identity and address) should be explained before a first withdrawal, not sprung after it. Support is judged on its channels and hours. Responsible gambling tools get their own section below.
Offers and Mobile
Offers are scored on their terms, not their headline. The wagering requirement is how many times a bonus must be staked before it can be withdrawn, and UK rules cap it at 10x from 19 January 2026. Minimum odds set the lowest price a qualifying bet can carry. On mobile, the cashier and account controls need to work as well as the betslip.
Red Flags That Stop a Recommendation
Some failings override the arithmetic. A site is not recommended, however high its score, if any of these apply:
- its licence cannot be verified
- withdrawals are refused or delayed without a stated reason
- it offers no deposit limit, time-out or self-exclusion option
- its bonus terms are missing or contradict themselves
Each one goes to whether you can trust the operator at all. With an unverifiable licence, nobody you can name holds the site to account. Unexplained withdrawal delays are how a balance stops being yours in practice, whatever the account screen says. Missing safer gambling controls leave you with no brake on your own spending. Contradictory bonus terms give the operator room to void winnings after the event, when you have already placed the bets.
A 4.5 average does not make up for any of them.
Responsible Gambling in Our Reviews
Every review checks three controls: a deposit limit (a cap on how much you can pay in over a set period), a time-out (a short break that locks the account) and self-exclusion (closing the account for a longer, fixed spell). At sites not on GamStop these tools are voluntary. Where they are missing the score drops, and where all three are absent the site cannot be recommended. If you have self-excluded, no site in any review is a way back in. GamCare’s National Gambling Helpline is free, confidential and open 24 hours on 0808 8020 133, and blockers such as Gamban or BetBlocker can shut gambling sites off on your devices.
Keeping Reviews Up to Date
There is no fixed interval for revisiting a review.
A review is reopened when a site changes its licence, its ownership, its payment methods, its withdrawal terms or its responsible gambling tools. The rating is then recalculated with the same weights, which can move a site either side of the 3.5 line. A new owner can bring new terms, and a new licence can bring a different set of protections, so neither gets treated as a footnote. Each review shows the date it was last updated. Check that date before relying on a score.
The People Behind the Reviews
Every review carries a named author. A rating should be traceable to a person as well as to a method, so the name sits on the page. If a score looks wrong to you, there is a specific author responsible for it, and the reporting route below goes to the person who can correct it. This explanation of how we review was written by Mike Brown.
How to Flag an Issue With a Reviewed Site
If a reviewed site treats you badly, the order you act in matters.
- Keep records: screenshots of your balance, bet slips, chat transcripts and emails, all with dates.
- Contact the operator’s customer support and give them the chance to put it right in writing.
- If that fails, report it through the contact page on caughtoffside.com, with the site’s name and your evidence.
- Your report is checked against the published review. Where it holds up, it can lower the rating or remove the recommendation.
At sites licensed outside the UK, the approved UK dispute resolution route does not apply, so the records from step 1 matter even more.
Questions About Our Reviews
How quickly does a reported problem change a review?
There is no set timescale. A report is checked against the review first. If it stands up, the rating is recalculated, the recommendation can be withdrawn and the review's update date changes to show when that happened.
Does a high rating mean a site is safe?
No. A high rating means the site scored well against eight criteria when it was last assessed. Betting can still cost you money, and a site can change after publication, which is why every review carries an update date.
Why can two sites with similar scores feel so different?
The same total can come from different strengths. A 3.8 built on strong licensing and average odds is not the same proposition as a 3.8 built the other way round, so the criteria inside a review matter as much as the total.
About the writer
Sports Betting Editor
Mike Brown is the Sports Betting Editor at CaughtOffside. A former tipster and betting syndicate analyst, he writes on odds, bookmaker margins and expected value. He also reviews UK sportsbooks on withdrawals, KYC and promotional terms. He’s based in Manchester.
