Paid prize competitions are legal in the UK. The question isn't "are competitions legal?" but "is this particular competition run the lawful way?" The shortcut: CompWatch folds these checks into the trust grade on every one of the 418 sites we track.
The short answer
Paid prize competitions are legal in the UK, and most established operators run them lawfully. The catch is that the law draws a precise line: a paid game with prizes is only a lawful competition if it does one of two things. It must either require genuine skill, knowledge or judgement to enter, or offer a real free entry route into the same draw on equal terms. Get neither right and the same game becomes an unlicensed lottery, which is unlawful unless the operator holds a gambling licence, and competition operators almost never do.
So the question isn't really "are competitions legal?" but "is this particular competition run the lawful way?" The rest of this guide explains the line so you can tell the difference, and shows how CompWatch folds these checks into the trust grade on every one of the 418 sites we track.
This is general information about how the rules work, not legal advice. If you need a ruling on a specific competition, speak to a qualified adviser or the Gambling Commission.
Competition vs lottery: the legal line
The relevant law is the Gambling Act 2005. It separates three things that can look identical to a customer: a lottery, a prize competition and a game of pure chance. The distinction matters because lotteries are tightly restricted (generally only societies, local authorities and the National Lottery may run them), whereas a genuine prize competition sits outside the lottery rules entirely.
In plain terms, a paid game where winners are chosen by pure chance (a random draw, with no skill needed and no free way in) is a lottery. Run commercially for profit without a licence, that is unlawful. A game crosses into being a lawful prize competition only when chance is no longer the sole gateway: either because skill genuinely filters who can enter, or because paying is never required to take part. Those are the two lawful routes, and we look at each in turn below.
The two lawful routes
An operator must rely on one of these two routes (many use both). Either one, done properly, keeps a paid competition on the right side of the line.
A genuine skill, knowledge or judgement element
The competition asks something that meaningfully limits who can enter: a real question, puzzle or judgement that a reasonable proportion of people would get wrong, or that deters a significant number from entering. The point is that the skill element must actually do work. It has to genuinely filter entrants, not act as a fig leaf.
A genuine free entry route
Instead of (or as well as) a skill element, the operator offers a way to enter the same draw for free, usually by post. If a free route exists on equal terms, paying simply buys convenience rather than the only path to a prize, so the game is no longer an unlicensed lottery.
Where operators get into trouble is treating these as box-ticking. A question anyone can answer by copying the obvious word from the page does not meaningfully limit entrants. A free route hidden in the small print, or made deliberately awkward, is not a genuine alternative. Both routes have to be real.
What a genuine free entry route must be
Because the free entry route is the one most operators lean on, it is worth being precise about what "genuine" means. A free route that is a token gesture does not fix anything. If anything, it shows the operator knows the rule exists but isn't honouring it. A genuine free entry route should be:
- Into the same draw. Free entrants compete for the same prize, in the same draw, as paying entrants, not a separate, smaller or later pool.
- On equal terms. A free entry carries the same chance of winning as a paid one. It is not capped, deprioritised or quietly disadvantaged.
- Genuinely accessible. A real, verifiable UK postal address; clear instructions; a realistic deadline; and no requirement to buy anything to take part.
- Stated plainly. The route is set out in the terms where a customer can actually find it, not buried or omitted.
If you want to use a free route yourself (and using it makes every paid entry worse value, so it is worth knowing), our free postal entry guide walks through how the route is meant to work and how to enter correctly.
Are these gambling?
A prize competition run lawfully is not licensed gambling. It sits outside the Gambling Commission's licensing regime precisely because it relies on skill or a free route rather than pure paid chance. That is an important distinction, but it cuts both ways. It does not mean these competitions are loosely regulated like a casino or a bookmaker; it means they have to keep out of the lottery definition to stay lawful at all, and must still comply with consumer protection, advertising and fairness rules.
It also doesn't change the basic maths for you as an entrant. Paying for entries still costs money and most prizes go to someone else, so the realistic expected value of a paid entry is usually slightly negative. Treat competitions as paid entertainment, set a budget, and never spend money you can't afford to lose. If entering ever stops feeling like fun, our play responsibly page has sources of support.
Red flags that a "competition" is really an unlawful lottery
You don't need to be a lawyer to spot the warning signs. Most non-compliant games trip over the same basics:
- No free entry route anywhere. If the terms mention no postal or other free alternative at all, and there is no meaningful skill element, the game looks like a paid random draw, i.e. a lottery.
- A "skill" question that filters nobody. The answer is printed on the same page, or is something everyone knows. A trivial question is widely treated as not a genuine skill element.
- A free route that's a fig leaf. The free option is hard to find, hedged with conditions, given worse odds, or routed into a different draw.
- No identifiable UK operator. No registered company, no real address, no way to hold anyone accountable. Any business taking payments from UK consumers should be a company registered at Companies House.
- Winners drawn purely at random with no skill and no free way in. That combination is the textbook definition of a lottery.
None of these on its own proves a site is acting unlawfully, but they are the things to check. Our broader guide to spotting fake or scam competition sites covers the wider safety checks, and the Voluntary Code, explained shows the standards the better operators sign up to.
How CompWatch helps
We can't give legal rulings, but we can surface the signals that matter, and two of them map directly onto the lawful routes above. Every site we track is scored against trust indicators, and among them are:
A site offering a clear free entry route, and one that has signed up to an industry voluntary code, is showing it understands the rules it has to operate under. Those, alongside published odds, published winners, secure payments and company longevity, roll up into a single letter grade from A+ down to F:
The grade is a starting point, not a verdict on legality, but it points you at the operators that take the rules seriously. You can see the indicators behind any site's grade, and exactly how the score is built, on our How We Rate page.
In short
- Paid prize competitions are lawful in the UK; the Gambling Act 2005 sets the boundary.
- The boundary is whether the game uses a genuine skill element or a genuine free entry route into the same draw, not pure paid chance.
- A free route must be the same draw, equal terms, genuinely accessible and clearly stated.
- Lawful competitions are not licensed gambling, but must still comply with consumer and fairness rules. You should still treat them as paid entertainment.
- The free-entry and voluntary-code indicators in our grade are two quick signals that an operator understands the rules.
See which operators play by the rules
We've already checked for free entry routes, voluntary-code membership and more across the sites we track, and turned them into a single trust grade. Look up any operator's score and its live competitions.
Browse site trust scores →