Companies House Rejected My Company Name: What Should I Do?
Having a company name rejected by Companies House can be frustrating, especially when you have already chosen your brand, bought a domain, created a logo, or started preparing your business launch. The good news is that a rejected company name does not necessarily mean there is a problem with your business idea. In most cases, the issue is with the proposed name itself or with one of the legal requirements surrounding company names.
Companies House has specific rules covering duplicate names, sensitive words, government-related terms, offensive names, misleading names and other restricted categories. Some applications can also be rejected because the name is entered incorrectly on the incorporation application. If Companies House has rejected your company name, the right response is to identify the exact reason, fix the underlying problem and submit a compliant alternative. This guide explains what to do next, why company names are rejected and how to avoid the same problem when you reapply.
Why Does Companies House Reject Company Names?
Companies House cannot register every name a founder chooses. UK company names must comply with rules under company law and related regulations. The most common reasons include:
- The name is the same as an existing registered company.
- The proposed name is considered too similar to another name.
- It contains a sensitive or restricted word.
- It suggests a connection with the UK government or another public authority without permission.
- It contains offensive or prohibited wording.
- The name contains certain restricted characters or computer code.
- The name appears intended to facilitate fraud or another offence.
- The required company-name ending is missing or incorrect.
- The application contains information that does not meet the incorporation requirements.
Companies House specifically identifies duplicate company names as a common reason for rejection. Its current IN01 guidance also highlights incorrect or missing name endings as a reason an incorporation application may be rejected. The important distinction is that a name being available in an informal sense does not necessarily mean it is legally registrable.
Step 1: Check the Exact Reason for Rejection
Before choosing another name, read the rejection message carefully. Do not immediately submit the same application again with minor changes. First establish exactly what Companies House objected to. For example:
Rejected: “The company name is a duplicate of a name already on the register.”
This points towards the Companies House "same as" rules. By contrast:
Rejected: “The proposed name contains a sensitive word or expression.”
Changing a single letter may not solve that problem. You may need permission from the relevant authority or a completely different name. Your first task is therefore to classify the rejection.
A practical rejection checklist
Ask:
- Is the problem the name itself?
- Is the name too similar to an existing company?
- Does it contain a sensitive word?
- Does it imply government or public-authority approval?
- Is the company type and name ending correct?
- Is the issue actually another part of the incorporation application?
That last point matters. An incorporation application can be rejected for reasons unrelated to the underlying business concept, including incomplete statement-of-capital information or other incorrect application details.
Step 2: Search the Companies House Register Again
If the rejection concerns duplication or similarity, go back to the Companies House register and search for your proposed name. However, don't search only for an exact spelling. Companies House applies specific rules to determine whether names are treated as the same. Certain punctuation, special characters, words and characters with similar meanings or appearances may be disregarded when comparing names. For example, changing: Bright Future Ltd to: Bright-Future Ltd
may not create a sufficiently different company name. Similarly, changing spelling, punctuation or certain symbols may still leave you with a name that Companies House treats as effectively the same.
Don't rely on a single spelling
When checking a proposed name, search variations involving:
- singular and plural forms
- abbreviations
- punctuation
- "&" and "and"
- numbers and their written equivalents
- common business terms such as "company" or "co"
- similar-looking characters
- alternative spellings
The objective is not simply to find an exact match. You want to understand whether the name could fall within Companies House's "same as" rules.
Step 3: Understand the Difference Between "Same As" and "Too Like"
This distinction is particularly important.
"Same as" an existing company
A proposed name cannot normally be the same as another registered company name. Companies House gives examples where relatively minor differences in punctuation or characters do not make the names sufficiently different.
There are limited exceptions, including certain group-company situations where the relevant conditions and consent requirements are satisfied. For most new founders, however, the practical solution is straightforward: choose a genuinely different name.
"Too like" an existing company
A name can also create problems because it is considered too similar to an existing registered name. This is different from the automatic "same as" test. Companies House explains that a name may be considered "too like" another name where it differs by only a few characters, signs or punctuation, or where it looks or sounds very similar.
There is also an important timing point: a name that initially gets registered is not necessarily immune from future objections. Companies House can require a company to change its name in certain circumstances. This means founders should not treat incorporation approval as proof that a name is completely protected from future challenge.
Step 4: Check Whether Your Name Contains a Sensitive Word
Another common reason for rejection is the use of a sensitive word or expression. Some words can only be used in a company name if you obtain prior approval or supporting evidence from the relevant authority. The current Companies House guidance includes extensive lists of sensitive words and expressions. The list was updated in July 2026. Examples of areas covered by the rules include terms associated with:
- government
- regulation
- professional or specialist status
- financial services
- accreditation
- universities and education
- insurance
- public authorities
- certain regulated activities
The precise requirements depend on the particular word. For example, Companies House guidance states that using "Insurance" or "Insurer" in a company name requires a letter or email of non-objection from the Financial Conduct Authority in the circumstances specified by the guidance.
What should you do?
If the rejection is because of a sensitive word, you generally have two options:
Option 1: Remove or replace the sensitive word.
This is usually the simpler route for a new business.
Option 2: Obtain the required approval.
If the word is essential to your business identity and your circumstances genuinely justify its use, follow the relevant approval process before attempting registration again. Do not assume that because a word is commonly used in everyday business language, it is automatically acceptable in a registered company name.
Step 5: Check for Government or Public-Authority Implications
A proposed company name can also cause problems if it suggests a connection with the UK government, a devolved administration, a local authority, a specified public authority, a foreign government or certain international organisations. Companies House guidance specifically restricts names that create such an impression unless the required approval is obtained.
For example, a founder should be cautious about selecting a name that could make customers believe the company is an official government organisation or an authorised public body. This is particularly relevant to startups operating in areas such as:
- compliance
- regulation
- finance
- education
- healthcare
- public services
- security
- professional accreditation
If your brand name sounds official, ask whether an ordinary customer could reasonably misunderstand who operates the organisation.
Step 6: Check the Company Name Ending
If you are forming a standard UK private limited company, the name normally needs to end with "Limited" or "Ltd". Welsh companies can use the relevant Welsh equivalents where applicable. Companies House specifically identifies an invalid or missing company-name ending as a reason an incorporation application can be rejected. A private limited company cannot simply use a "PLC" ending, for example.
A simple error such as entering the wrong company type or name ending can therefore stop an otherwise straightforward application. Before resubmitting, make sure:
- the company type is correct;
- the proposed name has the appropriate ending;
- the ending corresponds with the type of company being registered;
- the spelling is correct throughout the application.
Step 7: Check Trademarks Before Choosing a Replacement
This is one of the most important steps founders often overlook. Companies House approval is not the same as trademark clearance. A company name can satisfy Companies House registration rules and still create intellectual-property problems if it conflicts with an existing trademark or brand.
Companies House itself advises applicants to search the UK Intellectual Property Office trademark register when checking whether a proposed business name could infringe an existing trademark. So, before committing to your replacement name, check at least:
- Companies House company names
- UK trademark records
- Your preferred domain name
- Relevant social-media handles
- Major competitors operating in your market
For a startup intending to build a substantial brand, this additional research can save considerably more time and money than repeatedly changing names after launch.
What If My Preferred Name Is Already Taken?
You have several options.
Add a genuinely distinctive element
Instead of simply changing punctuation, introduce a meaningful distinguishing word. For example, if a proposed name is unavailable, consider whether adding a distinctive business descriptor, geographic element or brand term creates a genuinely different name. The key is distinctiveness, not cosmetic alteration.
Create a new brand name
Sometimes the best solution is to step back from the original name rather than trying to make it technically different. This can be particularly sensible when the existing company operates in the same sector and the similarity could confuse customers.
Use a trading name
A limited company can trade using a business name that differs from its registered company name, subject to the applicable rules. However, a trading name is not a workaround for prohibited company-name rules. Business names also have restrictions, including rules concerning sensitive words and certain protected terms.
What If Companies House Rejected the Name After I Already Paid?
A rejected incorporation application does not mean you should start the entire business process from scratch. First, determine whether the rejection is limited to the company name or whether other errors were identified. Then:
- Read the rejection notice.
- Identify every issue listed.
- Check the relevant Companies House guidance.
- Select a compliant replacement name if necessary.
- Review the entire incorporation application.
- Correct any other errors.
- Resubmit the application.
This is important because changing the name while leaving another application error unresolved can simply lead to another rejection. For online applications, Companies House has also stated in its incorporation guidance that rejected online incorporation payments made by card or PayPal are automatically refunded.
Can I Keep My Original Brand While Registering a Different Company Name?
Potentially, yes. A company's registered name and its trading or business name do not always have to be identical. For example, a company could have a formal registered name that differs from the customer-facing brand, provided the business-name rules are followed.
However, don't use this approach to deliberately bypass trademark, sensitive-word or other legal restrictions. For a founder building a long-term brand, it is usually better to understand the distinction between the legal company name, trading name, trademark and domain name from the beginning. These are related, but they are not the same thing.
What If My Company Has Already Been Incorporated?
If your company has already been registered under a name and you later decide that the name needs to change, that is a different process from having an incorporation application rejected. A UK company can change its registered name through the appropriate company procedure, such as a special resolution, and the new name does not officially take effect until Companies House registers the change.
Companies House currently provides an online service for certain name changes and also provides the NM01 process for a change of name by resolution. So, don't confuse: Rejected before incorporation → choose a compliant name and resubmit with: Already incorporated → follow the formal company name-change procedure They are separate processes.
A Better Company Name Check Before You Reapply
Before submitting another incorporation application, use this five-part test.
1. Companies House test
Search the proposed name and close variations.
2. Legal test
Check:
- "same as" rules
- "too like" risk
- sensitive words
- government implications
- prohibited wording
- correct company-name ending
3. Trademark test
Search the UK trademark register and consider whether your planned activities could create a conflict.
4. Brand test
Ask:
- Is it easy to pronounce?
- Is it easy to spell?
- Could customers confuse it with another business?
- Does it still make sense if the company expands?
5. Digital test
Check whether a suitable domain and relevant social handles are available. This five-step process is particularly useful for international founders forming UK companies remotely. A name that works in one market may create confusion or regulatory concerns in another.
Common Mistakes to Avoid
Changing only punctuation
"ABC Group Ltd" and "ABC-Group Ltd" may not be sufficiently different.
Adding "UK" automatically
Adding a geographical term does not guarantee that a name becomes legally distinct.
Assuming Companies House checks trademarks
It does not provide a complete trademark clearance service.
Assuming an available name is automatically safe
Availability and brand protection are different questions.
Ignoring sensitive-word rules
A word may look ordinary but still require approval under company-name regulations.
Reapplying without fixing the underlying issue
If the rejection reason has not been addressed, another application may simply fail again.
FAQs
Why did Companies House reject my company name?
Common reasons include the name being the same as an existing registered name, being too similar to another name, containing a sensitive or restricted word, suggesting an unauthorised government connection, or failing another company-name requirement.
Can I simply change one letter and reapply?
Not necessarily. Companies House rules can treat names as the same or too similar even where there are small spelling, punctuation or character differences. Choose a name that is genuinely distinguishable rather than relying on a cosmetic change.
Can I use a company name that already exists if the business is in a different industry?
An identical registered company name is generally not permitted simply because the businesses operate in different sectors. The Companies House "same as" rules apply to registered company names.
What happens if my company name contains a sensitive word?
You may need prior approval or supporting evidence from the relevant authority. Alternatively, you can remove the sensitive term and choose another name.
Does Companies House approval protect my brand?
No. Companies House registration and trademark protection are separate. You should conduct trademark research before committing substantial money to a brand.
Can I use a different trading name after Companies House rejects my company name?
A business can generally trade under a different business name, subject to the applicable business-name rules. However, a trading name should not be used to bypass restrictions that apply to company names.
Can I appeal a rejected company name?
The practical first step is normally to understand and address the specific reason for rejection. If the proposed name cannot satisfy the applicable rules, selecting a compliant alternative is usually more straightforward than trying to preserve the original name.
Can I change my company name after incorporation?
Yes. An incorporated company can change its registered name using the appropriate legal procedure, and the change takes effect once Companies House registers it.
Conclusion
A Companies House rejection does not necessarily mean your business idea or brand has failed. Usually, it means the proposed registered name does not satisfy one or more of the UK's company-name rules. The safest approach is to slow down before resubmitting. Read the rejection carefully, identify the precise problem, search Companies House for similar names, check sensitive-word and government-connection rules, verify the correct company-name ending and carry out a separate trademark check.
For founders, particularly those establishing a UK company from overseas, the goal should not simply be to find a name that passes the incorporation form. The better objective is a name that is legally registrable, commercially distinctive and capable of supporting the business as it grows.
Platforms such as IncorpUK, a UK company formation and management platform for global founders, can form part of the wider process of setting up and managing a UK company, but the final responsibility for choosing a compliant and commercially appropriate name remains with the business owner. A rejected name is a setback, not necessarily a dead end. Find out why it was rejected, fix the underlying issue, and make the next application with a name that has been properly checked.