How to Run a Giveaway or Competition (Legally) in the UK

A well-run giveaway can do wonderful things for a small business: it grows your audience, sparks engagement and gets people talking about your brand. A badly run one can land you in genuine legal trouble. The catch is that UK law draws a surprisingly sharp line between a legal prize promotion and an illegal lottery, and plenty of businesses cross it without realising. This guide explains the rules in plain English so you can run a promotion that works without breaking the law. It is general information, not legal advice — for anything significant, check the official guidance or take proper advice first.

What it is

A giveaway is a marketing promotion in which you offer a prize to encourage people to engage with your brand — but to be legal in the UK, it must be structured so that it is not an unlawful lottery. In practice, "giveaway" is an umbrella term covering two legally distinct things: a prize draw, where winners are chosen at random, and a competition, where winning depends on genuine skill or judgement.

That distinction sounds academic, but it is the single most important thing to get right. Whether your promotion is legal turns almost entirely on how people enter and how the winner is chosen.

The line that matters: lottery or not

Under UK law, a promotion strays into being an unlawful lottery when two things are both true: entrants have to pay to enter, and the winner is chosen purely by chance. Running a lottery generally requires a licence or has to fall within tightly defined exceptions, so ordinary businesses must avoid this structure altogether.

The good news is that you only have to break one of those two conditions to stay on the right side of the line:

1. Remove the payment to enter. If entry is genuinely free, a random draw is not a lottery. "Free" must be real — a hidden cost or a requirement to buy something can count as payment.
2. Add genuine skill. If winning depends on real skill, knowledge or judgement rather than chance, it is a competition, not a lottery, and payment to enter may be permissible.

The simple test to keep in your head: if people must pay and luck alone decides the winner, stop. Change one of those two things and you are usually back in legal territory — but confirm the specifics for your promotion.

What counts as "payment" is broader than cash. Premium-rate phone or text entry, or requiring a purchase, can all amount to payment in the eyes of the law. And "skill" has to be genuine — a question so easy that everyone gets it right may not be treated as real skill. This is exactly the kind of detail where the official Gambling Commission guidance is the authority to rely on.

Setting clear terms and conditions

Beyond the lottery rules, every prize promotion must be run fairly, and that means clear terms. The UK advertising codes — the CAP Code, enforced by the Advertising Standards Authority — require promoters to conduct promotions fairly and to make all significant conditions available to entrants before or at the point of entry.

At a minimum, your terms should spell out:

• How to enter and any eligibility rules (for example, age limits or UK residency).
• The closing date for entries.
• The prize — exactly what it is, how many are available, and any restrictions.
• How and when the winner is chosen, and how they will be notified.
• What happens if a winner cannot be contacted, and who the promoter is.

Vague or missing terms are one of the most common triggers for complaints, so this is not box-ticking — it is what makes the promotion defensible.

Social media giveaways are not exempt

It is worth stressing, because so many giveaways now run on social platforms: moving a promotion to Instagram or Facebook does not change the law. You still must avoid an illegal lottery structure, you still need fair and clear terms, and you must also follow the platform's own promotion rules, which often require you to state that the promotion is in no way sponsored or endorsed by the platform.

If the giveaway is run as a paid partnership, the usual disclosure rules apply on top, so the commercial relationship must be obvious to entrants. And the same fairness principles run through related tactics like affiliate marketing, where any commercial incentive has to be made clear too.

Make sure it actually serves your marketing

Legality aside, a giveaway should earn its place in your plan. The classic trap is attracting a flood of entrants who only want the free prize and vanish the moment it is awarded. To avoid that:

• Tie the prize to your business. Give away your own product or something your ideal customer would value, not a generic gadget that attracts everyone and no one.
• Be clear about the goal. Awareness, email sign-ups, engagement and follower growth are different aims that call for different entry mechanics. If the aim is to grow a mailing list, pairing the giveaway with sound email marketing turns one-off entrants into an audience you can reach again.
• Judge it by the right measure. A giveaway that triples your followers but adds no genuine customers has not really worked. As ever, it pays to look past vanity metrics and at outcomes that matter, the mindset behind sensibly measuring marketing ROI.

A giveaway is a tactic, not a strategy. It works best as part of a considered plan rather than a one-off scramble for attention.

A simple pre-launch checklist

Before you press publish, run through this:

• Is there a genuinely free way to enter, or a real skill element?
• Have I avoided requiring payment for a pure-chance draw?
• Are my full terms and conditions written and easy to find?
• Have I stated the closing date, prize and how winners are chosen?
• If on social media, have I followed the platform's promotion rules?
• For anything high-value or unusual, have I checked official guidance or taken advice?

The bottom line

Giveaways and competitions are a legitimate, effective marketing tool — but in the UK they sit close to gambling law, and the line is real. The decisive question is whether entrants must pay and winners are chosen purely by chance; if both are true, you are running an unlawful lottery. Remove the payment or add genuine skill, write clear and complete terms, and follow the advertising codes and any platform rules. This article is general information, not legal advice, so for anything significant, consult the Gambling Commission and CAP guidance or take professional advice. Get the structure right, and a giveaway can grow your brand without ever putting it at risk.