Cookie consent on your startup’s website: a simple compliance guide

If your startup runs a website, you have almost certainly seen a cookie banner pop up. For many early-stage teams, that banner is the first real touchpoint with data protection compliance. Get it wrong and you risk complaints, wasted engineering time, or even a fine. This guide strips away the confusion so you can get it right without spending hours on regulators’ websites.

As always, this is not legal advice. If you are unsure about your specific setup, speak to a solicitor or data protection specialist.

What cookies are we actually talking about

A cookie is a small text file that a website stores on a visitor’s device. Many are harmless and genuinely useful: they remember what is in a shopping basket, keep a user logged in, or measure site performance. Others follow people around the internet and build profiles for targeted advertising.

UK law splits cookies into two broad buckets:

• Strictly necessary cookies – essential for the website to work or for a service the user has asked for. An ecommerce site’s session cookie or a load-balancer cookie usually falls here.
• Non-essential cookies – everything else, including analytics, personalisation, social media plugins, and advertising cookies.

That distinction matters because it determines when you need consent.

The legal backdrop in the UK

Two pieces of regulation apply: the Privacy and Electronic Communications Regulations (PECR) and the UK GDPR. PECR says you must not store or access information on a person’s device unless you have a valid reason. For strictly necessary cookies, that reason is the “strictly necessary” exemption itself: no consent required. For all other cookies, you need the user’s consent before you set them.

Under the UK GDPR, consent must be freely given, specific, informed, and unambiguous. That means pre-ticked boxes, implied consent from continued browsing, and cookie walls that force acceptance are not valid. The person must take a clear affirmative action, like clicking an “accept” button.

What a compliant cookie banner looks like

A banner that simply says “We use cookies. By using this site you agree” will not cut it. Here is what a sensible, low-friction setup includes for a small UK startup:

1. A clear first-layer notice

Show a banner or pop-up the first time someone visits. It should explain in plain language that you use cookies, mention the broad purposes (e.g., “to understand how people use our site and to personalise ads”), and offer genuine choices. Typically, you provide:

• An “Accept all” button.
• A “Reject non-essential” button (equally prominent).
• A “Manage preferences” link that opens a more detailed panel.

Both “accept all” and “reject non-essential” must be single-tap actions that take effect immediately.

2. Granular controls in a preference centre

The preference centre lets people toggle categories on or off: analytics, marketing, functional (if they are not strictly necessary), and so on. Default all non-essential categories to off. Users must be able to change their mind later, so provide a persistent link (often “Cookie settings” in the footer).

3. A link to your privacy notice

Your privacy notice (or cookie policy) should list every cookie your site uses, who sets it (first-party or third-party), what it does, how long it lasts, and which category it falls into. If you need help drafting a startup-friendly privacy notice, StartupDocs has a template pack designed for early-stage companies.

Prior consent means prior consent

Non-essential cookies must not fire until the visitor has made a choice. That often means a small technical change: scripts for analytics or ad pixels should be blocked by default and only loaded after consent. If you use Google Analytics 4 or a similar tool, configure your tag manager to respect the consent state. Many consent management platforms (CMPs) can handle this with relatively little developer work.

If you are a tiny team, you can also use a lightweight, self-hosted consent banner script and wrap third-party snippets in a simple conditional. The key is that no tracking data leaves the browser until you have permission.

Six practical steps for a small startup

1. Audit your cookies. Browse your own site, open developer tools, and note every cookie set on a fresh visit. Group them into strictly necessary and non-essential. Don’t forget third-party cookies set by embedded videos, social share buttons, or analytics.

2. Choose a consent solution. A free or low-cost CMP (CookieYes, Cookiebot, etc.) will save you time if you have a standard site. If you are resourceful, you can build a plain HTML/CSS banner that stores consent in a first-party cookie.

3. Draft a cookie list and link it. Put the list inside your privacy notice or a standalone cookie policy page. Link to it from the banner.

4. Implement blocking before consent. Adjust your code so non-essential scripts only load after a positive consent signal. Test this using a browser’s incognito mode, checking that analytics do not appear until you click “accept”.

5. Log consent choices. Under the UK GDPR, you need to be able to demonstrate that consent was given. Store a timestamp, the user’s IP address or a pseudonymous identifier, and the specific choices made. Most CMPs do this automatically. If you go the DIY route, keep a simple log in a secure, access-controlled place.

6. Review and refresh. At least once a year, and whenever you add a new tool or plugin, repeat the audit. Cookies expire, SaaS tools change, and your site evolves.

What happens if you get it wrong

The Information Commissioner’s Office (ICO) has made it clear that non-compliant cookie banners are a priority. While the ICO often starts with warning letters, persistent or serious breaches can lead to enforcement action. Beyond the regulatory risk, a messy consent experience can damage trust: users increasingly notice banners that make it hard to say no.

When to talk to a professional

If you operate in healthtech, fintech, or any sector handling sensitive personal data, the bar is higher. Likewise, if your site sets dozens of third-party cookies for programmatic advertising, the mapping exercise becomes complex. In those cases, a brief conversation with a data protection solicitor can save you a lot of pain later. But for the typical early-stage SaaS or ecommerce startup, the steps above will get you most of the way there.

A few hours of work now will keep your startup on the right side of the rules and free you up to focus on building a product people actually want to use.