title: "UK Company Name Rules 2026: What's Allowed & What's Banned" metaTitle: "UK Company Name Rules 2026 | Naming Guidelines" metaDescription: "UK company name rules 2026. Banned words, sensitive terms, trademark issues, offensive names, and how to check availability before registration." slug: uk-company-name-rules-2026 author: UK LTD Registration publishedDate: 2026-03-12 updatedDate: 2026-03-12 category: Company Formation tags: [name availability, rules, guidelines, legal] focusKeyword: UK company name rules secondaryKeywords: [UK company naming guidelines, banned company names UK, company name restrictions, sensitive words Companies House, trademark company name UK] searchIntent: informational commercialIntent: low featured: false readTime: 10 wordCount: 2200 schema: type: Article headline: UK Company Name Rules 2026 What's Allowed and What's Banned datePublished: 2026-03-12 dateModified: 2026-03-12 author: type: Organization name: UK LTD Registration publisher: type: Organization name: UK LTD Registration logo: type: ImageObject url: https://ukltdregistration.com/images/logo.png

UK Company Name Rules 2026: What's Allowed & What's Banned

Choosing a name for your UK Limited Company is arguably the most exciting part of the formation process. It is your ultimate brand identity.

However, before ordering business cards or registering domain names, you must pass the strict legal criteria enforced by Companies House. In 2026, the registrar tightened enforcement on duplicate and misleading corporate names.

If you get this wrong, your application will be rejected (or worse, you’ll be forced to change it later under threat of legal action). Here is the ultimate 2026 guide to UK company naming rules.

Rule 1: It Must Be Unique ("Sameness" Rules)

The primary rule is simple: Your company name cannot be exactly the same as another name already sitting on the Companies House register.

But "sameness" is broadly defined. Adding punctuation, slight spelling tweaks, or generic suffixes will not trick the system.

Examples of "Same As" Violations:

Suppose a company called Acme Consulting Ltd exists. You cannot register:

Acme Consulting UK Ltd
Acme-Consulting Ltd
Acme Consulting Company Ltd
Acme Consultings Ltd (pluralization doesn't fool the system)

If the core distinctive element of the name is identical to an existing company in the exact same commercial sector, Companies House will block the application. Use our Free Name Search Tool to verify your name instantly →

Rule 2: It Must End with the Correct Designation

Every private limited company must declare its corporate structure at the end of its name. You must include either:

Limited or Ltd
(Cwmyni Cyfyngedig) or (Cyf) – if registered specifically in Wales.

Public Limited Companies (PLC) and Limited Liability Partnerships (LLP) have different rules entirely.

Rule 3: No "Sensitive" Words Without Justification

To protect the public from misleading businesses, Companies House maintains a colossal list of "Sensitive Words".

If your name includes these words, your application will be subjected to an extended manual review, and you must provide supporting documentation proving you have the legal right or professional standing to use that word.

Common Sensitive Words Include:

Government/Authority implyers: British, National, Queen, King, Royal, Authority, Commission.
Regulated Professions: Bank, Clinic, Trust, Foundation, Dental, Police, University.
Corporate Status implyers: Group, International, Holdings (Usually acceptable, but often require proof the company has subsidiaries or international headquarters).

If you submit a name containing "Bank" without a letter of authorization from the Financial Conduct Authority (FCA), the application will be immediately rejected.

Rule 4: Absolutely No Offensive Language

Companies House possesses the ultimate discretionary power to reject names they deem offensive, abusive, harmful, or legally inappropriate.

It cannot promote a criminal act, contain heavy profanity, or display hateful speech. (Attempting to bypass this with clever abbreviations generally fails in 2026).

Rule 5: Trademarks Are a Separate Legal Minefield

This is the biggest mistake founders make: Assuming that just because Companies House accepts a name, it means you can legally trade under it.

Companies House does not cross-reference the UK Intellectual Property Office (UKIPO) Trademark database.

You could successfully register "Starbucks Coffee Retail Ltd" precisely because there isn't another company formally registered with that perfectly identical string. But the very next day, your company will be served a Cease and Desist notice by Starbucks Corporation for trademark infringement, dragging you into costly litigation.

Always check the UK Trademark Database before committing to a name.

Conclusion & Next Steps

Finding an available, legally sound name is a balancing act of creativity and compliance. Once you find the perfect one, protect it fast. Good names vanish quickly in the UK registry.

Got a compliant name in mind? Check its availability instantly and incorporate today for £104.99 →