Understanding Types of Cookies and Their Legal Implications for UK Businesses

If your business runs a website, sells online, or offers an app, you’re already collecting data - and cookies are a big part of that process. Understanding the types of cookies used on your platforms isn’t just a nice-to-have for tech teams; it’s essential for legal compliance under UK law and for maintaining customer trust.

If you’re unsure what cookies actually do, what the different types are, or whether your website is in the clear legally, don’t stress - you’re certainly not alone. Many new and growing UK businesses find cookies confusing. The good news? With a little straightforward explanation (and the right legal advice), you’ll be set to manage cookies the right way and steer clear of avoidable fines or unhappy customers.

This guide will walk you through the most important cookie types, the legal reasons you need to know about them, and the practical steps you can take to keep your business compliant. By getting your legal foundations right (from day one), you’ll build trust, protect your brand, and avoid common data compliance pitfalls.

What Are Cookies and Why Do They Matter for Businesses?

Cookies, in simple terms, are small text files stored on a user’s device by websites or apps. They help websites work properly, remember visitor preferences, track user behaviour, and support online advertising - powering huge parts of today’s internet.

For businesses in the UK, cookies matter for two key reasons:

• They impact user experience: The right cookies make your website easier to use (think remembering a shopping cart), but the wrong ones (or too many) can annoy users and deter them from your business.
• They are regulated by law: The UK GDPR and the Privacy and Electronic Communications Regulations (PECR) set strict rules on how (and when) you can set cookies, what info you must give, and when you need consent.

In other words: not all cookies are created equal. And knowing exactly which ones you use is essential to staying out of legal hot water.

What Are the Main Types of Cookies Used on Websites?

When we talk about cookies types (especially when it comes to the law), we’re usually referring to their technical function and how much personal data they handle. Let’s break down the key cookie categories you’ll encounter on most websites and apps in the UK:

1. Strictly Necessary Cookies

• Enable core website functions (like logging in, online forms, keeping carts updated).
• Typically set by your website directly (first-party cookies) and essential for it to operate.
• Legal note: You don’t need explicit consent for these, but you must still inform users they’re in use.

2. Performance (Analytics) Cookies

• Monitor how visitors use your website (e.g. Google Analytics, traffic stats, page timings).
• Help businesses improve site performance and user experience.
• Legal note: Consent is usually required before setting these cookies - unless they are completely anonymised.

3. Functional Cookies

• Remember choices users make (language settings, region selection, remember-me features).
• Can improve personalisation and ease-of-use for visitors.
• Legal note: Usually need consent, unless the setting is strictly necessary for a requested service.

4. Targeting or Advertising Cookies

• Track browsing habits and build profiles for targeted ads (think Facebook Pixel, Google Ads remarketing tags).
• Frequently set by third parties (ad networks) rather than your business directly.
• Legal note: Explicit opt-in consent is required. Users must be told exactly what’s being tracked and have a clear choice to accept or decline.

5. Third-Party Cookies

• Placed by domains other than the one the user is visiting - often by analytics providers, social media integrations, or advertising partners.
• Critical for tracking across multiple sites and for social/share features.
• Legal note: Subject to the same consent and transparency requirements as above, but often harder to monitor/control, so extra diligence is needed.

Do All Cookies Handle Personal Data? (And What Counts as Personal Data?)

This is a question we hear from business owners a lot: “Are cookies personal data under UK law?”

The short answer is: Many (but not all) cookies process personal data - and the strictest rules apply whenever they do.

A cookie counts as handling personal data if it can be linked (directly or indirectly) to an individual user. This includes:

• Identifying info (names, email addresses, account IDs)
• IP addresses (when combined with analytics or other identifiers)
• Any persistent unique identifier that tracks user behaviour across sessions/devices

Even apparently “anonymous” analytics data can become personal data if you combine it with other indicators (like device IDs or consent logs). That’s why the safest approach is always to assume cookies are or can be personal data unless you have cast-iron proof otherwise, and treat them according to UK GDPR standards.

This has big implications for small businesses using off-the-shelf tracking tools, cookies in your app, or marketing integrations - you’ll need both a clear Privacy Policy and a proper cookie process to be compliant.

What Cookie Laws Apply to UK Businesses?

Two main laws regulate cookie use for UK businesses:

• UK GDPR (General Data Protection Regulation): Covers any personal data processing, including via cookies. It sets strict requirements for consent, transparency, user rights (like data deletion), and secure handling of data.
• PECR (Privacy and Electronic Communications Regulations): Sits alongside GDPR and specifically covers electronic communications, including website cookies and similar technologies. It’s where you’ll find the exact rules about requiring consent for setting cookies (except strictly necessary ones).

Together, these regulations require businesses to:

• Get meaningful, active consent before setting most cookies
• Make it just as easy for users to refuse cookies as to accept them
• Clearly describe what each cookie does, what types of data are being collected, and who it’s shared with
• Maintain accurate records of user consent for audits (the so-called “cookie audit” process)

If you don’t follow these rules, you could face fines from the ICO (Information Commissioner’s Office), reputational damage, and even legal claims from affected users. These risks apply whether you’re running a multinational e-commerce site or a local business’s booking page - the law doesn’t care about your size!

What Does a Cookie Audit Involve (And Why Should I Do One)?

A cookie audit is simply a full review of every type of cookie and tracking technology your business uses online. This is an essential first step for:

• Understanding how data flows through your website or app (sometimes even your developer doesn’t know what plugins or integrations are sneaking in extra cookies!)
• Preparing for compliance by knowing exactly which cookies need consent and which just need to be disclosed
• Keeping up with changing regulations - the landscape for cookies types on the internet is always evolving and new devices (like cookie apps) mean new risks

A proper cookie audit will usually involve:

• Scanning your website and app with a tool or service to list all present cookies
• Classifying each cookie (strictly necessary, performance, functional, or targeting etc.)
• Reviewing whether the cookie is first-party (set by your business) or third-party (set by others)
• Mapping what data is collected, how long it’s kept, and if it’s shared or sold
• Documenting your cookies in a clear Cookie Policy on your website
• Checking whether you need to redesign your consent “pop-up” or “banner” based on actual usage

Conducting a cookie audit regularly (at least annually, or after major website updates) is crucial for reducing compliance risks. By mapping out exactly which cookies you use, you can ensure your Privacy Policy, Cookie Policy, and banners reflect reality - as required by law.

What Legal Steps Should UK Businesses Take to Manage Cookies Properly?

Getting cookie compliance right is a process - but it doesn’t have to be overwhelming! Here’s a checklist to keep your business on track:

• Audit your cookies: Use a trusted tool to scan your site and list all cookies types in use (don’t forget those set by third-parties or plugins).
• Get your documentation sorted: Draft or update your Privacy Policy and your Cookie Policy so users can easily understand what’s happening and why.
• Configure your cookie consent app/tool: Ensure you’ve got an up-to-date, functioning cookie banner that collects freely-given, specific and informed consent for any cookies beyond those strictly necessary. It should cover both web and mobile app cookies if relevant.
• Maintain records of consent: Be ready to show you’ve gathered valid consents and provided users with ways to change their choices (if the ICO comes knocking, a solid audit trail is your best defence!).
• Review and update cookie practices: Repeat the process following website app/feature updates or changes to PECR/GDPR rules. Laws change, and your business (and its data practices) will evolve too.

It’s also wise to check out the GDPR audit checklist for UK businesses and keep an eye out for ICO updates, as regulators (and customers) have become far more conscious of data privacy in recent years.

What Happens If You Ignore Cookie Compliance?

Cookie compliance isn’t just a box-ticking exercise. Failing to manage your cookies types properly can result in:

• ICO enforcement action, including investigations and fines
• Damage to business reputation and loss of customer trust
• Potential claims or data access requests from individuals
• Being de-listed from key third-party platforms (such as app stores or payment gateways that require privacy compliance)

The cost of getting cookies wrong can far outweigh the effort to fix them. The ICO has made it clear that all UK businesses (not just tech giants) must get cookie compliance right.

Key Takeaways

• There are several main types of cookies used by most websites and apps - but only some are ‘strictly necessary’ (these are the only ones where consent is not strictly required).
• Many cookies are personal data under UK law, meaning GDPR rules around transparency, rights and consent will almost always apply.
• Your business must follow both UK GDPR and PECR rules for cookies, including clear disclosures, a compliant cookie notice, and a detailed Cookie Policy.
• Carrying out a full cookie audit lets you identify risks, accurately document data practices, and review consent mechanisms for compliance.
• Neglecting your legal obligations around cookies can result in fines, losing customer trust, and other costly business consequences.
• Get advice on updating your privacy and cookie policies - a DIY approach is risky with rapidly-changing rules and complex integrations.

Need Help With Cookies Compliance Or Policies?

If you want tailored guidance for your business - whether you need a cookie audit, an updated Cookie Policy, or help configuring your cookie app - we’re here to help. Our friendly expert team can review your position and provide clear, fixed-fee advice.

To get started, call us on 08081347754 or email team@sprintlaw.co.uk for a free, no-obligations chat about your options.