Influencer Marketing Laws in the UK: Disclosure, Legal Risk and What Brands Often Miss

Influencer marketing works because it feels personal. A recommendation from a creator can come across as more authentic, relatable and persuasive than a traditional ad. For small businesses, that makes influencer campaigns an attractive way to build awareness and reach new customers without the feel of conventional advertising.

That same quality, though, is exactly why the law looks closely at it.

The legal risk in influencer marketing usually comes from the gap between how a post appears and what it actually is. If a post looks like a genuine personal recommendation, but is really part of a paid or otherwise commercial arrangement, consumers may be given the wrong impression. If that content also overstates what a product can do, the risk increases again.

In the UK, those issues are not just questions of best practice or platform etiquette. They sit within a broader framework of consumer protection law, advertising rules enforced by the ASA, and, in some sectors, additional regulatory requirements. Since 6 April 2025, the UK’s unfair commercial practices regime has been contained in the Digital Markets, Competition and Consumers Act 2024, which replaced the earlier CPR framework for conduct from that date onward.

Are Influencer Marketing Campaigns Legal in the UK?

Yes - influencer marketing is legal in the UK, but it needs to be handled carefully.

In practice, these campaigns are commonly assessed under:

• UK consumer protection law;
• The CAP Code enforced by the ASA; and
• Additional regulatory rules in certain sectors, such as financial services, medicines and gambling.

For most businesses, that means making sure:

• The commercial relationship is clear;
• The claims being made are accurate; and
• Any sector-specific restrictions are identified before content goes live.
  

Why Influencer Marketing Attracts Legal Scrutiny

Influencer content sits in an unusual position. It often looks like ordinary social content, but it may function as advertising. That matters because regulators do not just look at the format of a post - they look at what the post is doing and the impression it gives to consumers.

A customer sharing an independent opinion about a product is one thing. A creator promoting that same product as part of a commercial arrangement is another. Once there is payment, gifted product, a discount, affiliate commission, free travel, free services or some other incentive connected to the post, the content is more likely to be treated as commercial content and may need to be clearly identifiable as such. UK government guidance for brands and creators expressly addresses gifts, discounted products, commission and other incentives in this context.

That is the real legal logic behind influencer marketing rules in the UK: consumers should not be left guessing whether they are seeing a personal recommendation or a piece of marketing.

When a Recommendation Becomes Advertising

This is where many businesses get caught out. Influencer marketing can feel informal because it is delivered through personal channels, but that does not necessarily make it informal from a legal perspective.

In the UK, some influencer content will fall squarely within the CAP Code, particularly where there is payment or another reciprocal arrangement and the brand has some degree of editorial control over the content. But even where the CAP Code does not apply neatly, consumer protection law may still require the commercial relationship to be made clear if the content could otherwise mislead consumers. ASA guidance also flags affiliate marketing as an area where content often needs to be obviously identifiable as advertising.

That does not mean every friendly mention online is an ad. It does mean that where there is a real commercial relationship behind the content, businesses should not assume the usual advertising and consumer law principles fall away simply because the content appears casual or organic.

Once content is functioning as advertising or commercial promotion, the familiar legal questions follow. Is the commercial context clear enough? Are the claims accurate? Would an ordinary consumer be left with a false impression about what they are seeing?

The Real Legal Risk Is Consumer Deception

A lot of the public discussion around influencer marketing gets reduced to whether a creator remembered to write “#ad”. That is part of the picture, but it is not the whole picture.

The broader legal concern is whether consumers are being misled.

That can happen in two main ways. The first is where the audience is misled about the relationship behind the post - for example, where paid or gifted content appears to be an independent recommendation. The second is where the audience is misled about the product itself - for example, where an influencer makes exaggerated, unsupported or unrealistic claims about results.

That is why influencer marketing is best understood as an advertising and consumer law issue in a more personal format. The UK’s unfair commercial practices guidance under the DMCC Act focuses on misleading commercial practices, while the CAP Code separately requires ads to be obviously identifiable and not misleading.

Why Disclosure Matters

Disclosure matters because it helps close the gap between appearance and reality.

Where an influencer has been paid, gifted products or otherwise benefited in connection with promoting a brand, that commercial context should generally be made clear so audiences can understand what they are looking at. In the UK, the issue is not just etiquette - it is whether consumers can readily tell that the content is advertising or influenced by a commercial arrangement. Both ASA/CAP guidance and UK government guidance for brands emphasise that incentivised endorsements should be made clear.

The purpose of disclosure is not simply to tick a box. It is to help ensure advertising does not present itself as something more independent than it really is.

This is why businesses should be careful about relying on disclosures that are vague, buried or easy to miss. A disclosure does not do much work if it appears after a long caption, is hidden among unrelated hashtags, or uses language that does not clearly communicate the commercial relationship. The practical question is always the same: would an ordinary viewer understand, without much effort, that the content is promotional?

The issue is not whether a particular hashtag has been used as a technicality. The real question is whether the commercial nature of the content is made clear upfront and without ambiguity. ASA guidance says that if something is not obviously an ad from the context, a clear and prominent disclosure is needed upfront, and labels such as “Ad” are commonly recommended as the clearest approach.

That said, disclosure is only part of compliance. A clearly disclosed post can still create legal problems if the claims in it are misleading.

Why Brands Should Not Assume Responsibility Sits Only With the Influencer

One of the most common business assumptions in this area is that responsibility sits with the creator because the creator is the one filming the content, writing the caption and publishing the post.

In practice, that is too simple.

Depending on the circumstances, regulators may examine the role of both the influencer and the brand behind the campaign. If the content forms part of a business’s marketing activity, the fact that the creator drafted the post will not necessarily put the brand at a safe distance. A business may still face scrutiny where it helped shape the campaign, approved the messaging, provided the product, funded the promotion or otherwise benefited from the content. UK government guidance for brands expects businesses to take steps to ensure endorsements are transparent and compliant.

That is why businesses should think of influencer campaigns as advertising activity, not just community engagement. They are not simply buying reach. In many cases, they are commissioning a form of promotion that carries many of the same legal risks as other advertising, even though the delivery is more personal and informal.

Once that is understood, things like content approval rights, claim substantiation, written guidelines and compliance clauses stop looking overly cautious. They start looking like sensible campaign governance.

Higher-Risk Industries Need Extra Care

The legal risk becomes more serious again where the product being promoted sits in a regulated category.

For some businesses, general advertising and consumer law principles will be the main issue. For others, there may be an additional layer of product-specific regulation. That is especially important in sectors where inaccurate promotion can create a greater risk of harm.

Financial products are a clear example. In the UK, financial promotions rules are technology-neutral and apply across channels, including social media. Content that starts to sound like investment guidance or a financial promotion can create a very different level of risk from an ordinary brand endorsement, and the FCA expects promotions to be clear, fair and not misleading.

Medicines are another particularly sensitive category. In the UK, medicines advertising is tightly regulated, and prescription-only medicines cannot be advertised to the public. That means influencer campaigns involving medicines can create serious compliance issues very quickly.

Health and wellness claims can also attract heightened scrutiny even where the product is not a medicine. If an influencer suggests that a product can treat symptoms, deliver medical-style outcomes or achieve unrealistic results, the issue may not just be disclosure - it may also be whether the claim can lawfully be made and substantiated. This follows the general requirement that advertising must not mislead consumers.

Gambling promotions can also attract additional scrutiny. UK guidance on hidden advertising identifies gambling among the regulated areas where different regulators may be involved, and gambling advertising rules place particular emphasis on protecting children, young people and vulnerable persons.

This is why businesses in regulated industries should be especially cautious about influencer campaigns. The content may be assessed not only as advertising, but also against industry-specific legal requirements that leave much less room for casual or exaggerated messaging.

Regulators Are Already Paying Attention

This is not a purely theoretical risk.

UK regulators have been focused on influencer marketing for years. The ASA has dedicated influencer disclosure guidance and a disclosure tool. The UK government has also published guidance for brands and content creators dealing with social media endorsements, and the CMA has published guidance on unfair commercial practices under the DMCC Act 2024. In financial services, the FCA has also made clear that social media promotions - including influencer-style promotions - fall within the ordinary financial promotions framework.

That matters because it shifts the conversation. This is not an emerging issue where businesses can assume the rules are too unclear to enforce. If a business uses influencer marketing, it should treat that activity as part of its broader advertising compliance framework.

What a Responsible Influencer Campaign Looks Like

The businesses that usually manage this well are the ones that build legal thinking into the campaign before anything goes live.

That starts with the basics:

• What is the influencer receiving?
• What claims are being made?
• What evidence supports those claims?
• How will the commercial relationship be communicated to the audience?
  
• Who is reviewing the final content before publication?
  

A clear influencer agreement helps because it forces the commercial arrangement into writing. It gives the business a chance to set expectations around disclosure, approvals, edits, claim substantiation, prohibited claims, takedown or correction obligations, and post-publication issues.

Oversight matters too. Reviewing drafts, keeping records of approvals, saving screenshots of final posts and making sure marketing claims can be supported all put a business in a much stronger position than a model built on sending products and hoping the content comes out well.

In other words, a sensible campaign process is not about over-lawyering a creative project. It is about recognising that influencer marketing is still marketing - and treating it with the same level of care as any other public-facing promotion.

Key Takeaways for Businesses

Influencer marketing can be a very effective way to grow a brand, but it should not be treated as informal promotion just because it happens on social media.

Where a business works with an influencer as part of a commercial campaign, the content may be assessed under UK consumer protection law and, in many cases, under the CAP Code as well. That means the business should think carefully about whether the commercial relationship is clear, whether the claims being made are accurate, and whether extra rules apply because of the type of product being promoted.

For most businesses, the safest approach is straightforward: treat influencer campaigns like advertising from the start, be transparent about the relationship, avoid unsupported claims, and stay involved in what actually goes live.

Need Help With Influencer Agreements or Marketing Compliance?

If your business is planning an influencer campaign, getting the legal framework right early can save a lot of stress later.

That might mean putting the right influencer agreement in place, reviewing proposed campaign messaging, or checking whether a promotion raises issues under consumer law, the CAP Code or industry-specific rules. A small amount of legal review before launch is often much easier - and much cheaper - than trying to clean up a campaign after it has already gone live.

Frequently Asked Questions About Influencer Marketing Laws in the UK

Do influencers have to disclose paid promotions in the UK?

Where an influencer is promoting a brand as part of a commercial arrangement, disclosure will generally be important so consumers can understand the promotional nature of the content. Gifts, discounts, commissions and other incentives can matter here too, not just direct payment.

Can a business be responsible for an influencer’s post?

Potentially, yes. Depending on the circumstances, regulators may look at the role of both the influencer and the business behind the campaign, especially where the content forms part of the business’s marketing activity.

Do gifted products count?

They can. A campaign does not need to involve a straightforward cash payment to create legal risk. Free products, discounts, affiliate arrangements, trips or other benefits connected to promotion may still mean the content needs to be treated as commercial or transparently disclosed.

What is the biggest legal risk in influencer marketing?

Usually, it is the risk of misleading consumers - either because the commercial relationship is not made clear, or because the content makes inaccurate or unsupported claims about the product or service.

Are some industries riskier than others?

Yes. Businesses promoting financial products, medicines, gambling services or other regulated products should take extra care, because those campaigns may be subject to additional rules beyond general consumer law principles.

If you would like to know more about influencer marketing laws, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.