Can Someone Else See My Company’s UTR Number?

Yes, someone else can see your company's Unique Taxpayer Reference (UTR) if they have access to your HMRC letters, Corporation Tax documents or relevant business records. However, your company UTR is not normally displayed on the public Companies House register, so members of the public cannot simply look it up alongside your company's registration number. A company UTR is a 10-digit number issued by HM Revenue & Customs (HMRC) to identify a company's Corporation Tax record. It is used for tax returns, payments and communication with HMRC. Unlike your company registration number, it is not a standard piece of public company information.

Understanding who can access your UTR matters if you are a company director, founder, shareholder or overseas business owner. It is particularly important when you use accountants, formation agents, registered office services or other third parties to help manage your company. This guide explains whether your company's UTR is public, who may legitimately see it, what someone could do with the number, and how to protect your company's tax information.

Is a Company UTR Number Public Information?

No. A company's UTR is not normally published as part of its public Companies House record. Companies House provides public information such as a company's registered name, company registration number, registered office address, filing history, accounts and director details. You can view these records through the official Companies House register.

Your company UTR serves a different purpose. HMRC uses it to identify your company's Corporation Tax record. For example, someone searching for your business on Companies House can usually find its company registration number and filed documents. They cannot normally find the company's UTR simply by searching the register. However, this does not mean the UTR is completely secret. Someone who has access to your company's HMRC correspondence, tax returns or other documents may be able to see it. The key distinction is that your company UTR is not generally public information, but it may be visible to people who have legitimate or unauthorised access to your business records.

Who Can See Your Company's UTR Number?

Several people may have access to your company's UTR as part of their work or responsibilities.

1. Company directors and authorised staff

A director or an employee responsible for the company's tax administration may have access to the UTR through HMRC correspondence, company records or relevant online services.

Not every employee needs to know the number. Access should be limited to people who require it for legitimate business purposes. For example, a finance manager preparing a Corporation Tax return may need the UTR, while an employee responsible only for customer service may not.

2. Your accountant or tax adviser

An accountant or tax adviser who handles your company's Corporation Tax affairs may need the UTR to identify the correct tax record and manage relevant filings. Where an agent needs to deal with HMRC on your company's behalf, the appropriate authorisation process must be followed. HMRC explains the available methods in its official guidance on authorising a tax agent.

Giving an accountant your UTR does not mean you should automatically give them your personal login credentials. An agent should use the relevant authorisation arrangements rather than accessing your account by pretending to be you.

3. Your company formation or registered office provider

A company formation agent may receive or handle certain official documents depending on the services you use and the arrangements in place. If your registered office is managed by a third-party provider, HMRC correspondence may be delivered to that address. HMRC confirms that a company's UTR is sent to the business address registered with Companies House.

Whether the provider actually sees your UTR depends on how incoming mail is received, processed, scanned and forwarded. Do not assume that every formation agent automatically has access to your tax records.

4. HMRC staff

HMRC uses the UTR to identify the relevant tax record. Staff who are authorised to handle the company's tax affairs may access information as required for their duties. This is different from public access. HMRC's internal systems and processes govern how tax records are handled.

5. Anyone who can access your company's documents

A person may see your UTR without having formal authority to manage your tax affairs. For example, a former employee might retain copies of tax documents, a shared mailbox might be accessible to several people, or a company letter might be opened by someone who handles incoming post. This is why protecting the documents containing your UTR matters just as much as protecting the number itself.

Can Someone Find Your Company UTR on Companies House?

Generally, no. Companies House provides public company information, but a company's UTR is an HMRC tax reference rather than its company registration number. The two numbers are different:

A person who knows your company name or registration number cannot ordinarily use the public register to retrieve your UTR directly. However, remember that information can appear in documents outside the public register. If your UTR has been included in correspondence or files shared with another party, that party may be able to see it.

What Can Someone Do With Your Company UTR?

A UTR is a sensitive business identifier, but it is not the same as a password or a complete set of account credentials. Someone who obtains your UTR does not automatically gain access to your company's full HMRC account or become authorised to act on your behalf.

Access to HMRC online services involves additional registration and security steps. HMRC's Corporation Tax service, for example, requires a company to provide its UTR and other identifying information during the relevant registration process. Nevertheless, you should not treat the number as harmless public information. Depending on the circumstances, someone who has your UTR may be able to:

• Identify or refer to your company's Corporation Tax record when communicating with HMRC.
• Use the number alongside other information when attempting to impersonate the company.
• Make fraudulent communications appear more convincing by including accurate tax details.
• Use it as one piece of information in a broader attempt to gain access to business accounts or sensitive records.

The risk depends on what else the person knows and whether they can access your company's correspondence, credentials or other identifying information. Knowing your UTR alone is not the same as having access to your company's tax account. Even so, you should avoid disclosing it unnecessarily and protect any documents that contain it.

Can Someone Access Your HMRC Account If They Know Your UTR?

Not simply because they know the number. A UTR identifies a taxpayer's record; it is not intended to function as a password. Access to HMRC online services involves separate login and registration arrangements. For Corporation Tax online services, HMRC requires identifying details to set up access, and the company must complete the relevant steps to activate the service.

However, if someone also has access to your Government Gateway credentials, email account, business correspondence or other verification information, the risk may be greater. To protect your account:

• Keep your Government Gateway user ID and password private.
• Never give your login credentials to an accountant or another agent; use HMRC's official authorisation arrangements instead.
• Protect the email account used for business and tax correspondence.
• Restrict access to documents containing the UTR.
• Review who has access to your company's tax services and records.

HMRC explicitly advises businesses not to give their login credentials to an agent or anyone else.

Should You Share Your Company UTR With an Accountant or Bank?

It depends on why the information is requested. If your accountant is preparing a Corporation Tax return or handling a relevant HMRC matter, providing the UTR is a normal part of the process. A bank, payment provider, lender or other business may also request tax or company details during onboarding or verification. Before sharing your UTR, establish why it is needed and whether the request is genuine. Use these practical checks:

1. Verify the requester. Confirm that the request comes from the actual organisation and a legitimate contact.
2. Understand the purpose. Ask why the UTR is required and how it will be used.
3. Use a secure channel. Avoid sending tax documents through an unknown email address or an unverified link.
4. Share only what is necessary. Do not automatically provide additional tax records or login credentials.
5. Keep a record. For sensitive disclosures, note who received the information and why.

A legitimate request for a UTR does not necessarily indicate a problem. The important thing is to confirm that the request is appropriate and that the recipient will handle the information securely.

How Can You Protect Your Company's UTR?

You do not need to hide your UTR from every person who works with your company. Instead, treat it as confidential business information and control access sensibly.

Keep HMRC correspondence secure

Store Corporation Tax letters, tax returns and payment notices in a restricted digital folder or a secure physical filing system. These documents may contain more sensitive information than the UTR alone.

Review access to your registered office mail

If your company uses a registered office service, understand how official letters are received, scanned and forwarded. Confirm who can view the documents and how they are stored. This is especially useful for overseas founders who rely on a UK-based service provider to receive official correspondence.

Remove access when a working relationship ends

If you change accountants or stop using a company management provider, review their authority to deal with HMRC and remove any authorisations that are no longer required. HMRC provides guidance on changing or removing an agent's authorisation. The process depends on the tax service and the type of authority granted.

Be alert to suspicious requests

Be cautious if someone asks for your UTR alongside passwords, authentication codes or other information that would give them access to your accounts. Do not assume a message is genuine simply because it contains your company name, registration number or UTR. Verify unexpected requests through independently obtained contact details.

What Should You Do If Someone Has Obtained Your UTR Without Permission?

Discovering that another person has seen your company's UTR does not automatically mean your company has been compromised. Start by assessing what happened and what information may have been exposed. If the UTR appeared in a document shared with the wrong person:

• Ask the recipient to stop using the information and securely delete the document where appropriate.
• Review whether the document also contained other sensitive details.
• Check who has access to the original file or shared folder.

If you suspect an attempt to access your HMRC account:

• Secure your login credentials and the associated email account.
• Review any available account activity and company tax records.
• Contact HMRC through its official channels if you suspect fraudulent activity.
• Review the authority granted to accountants, agents or other representatives.

If someone has impersonated your company or made an unauthorised tax-related change: Contact HMRC promptly and explain what happened. Keep copies of suspicious messages, letters and other evidence. Do not assume that you need a new UTR simply because someone has seen the existing number. A UTR is a long-term identifier for the company's tax record, and the appropriate response depends on the nature of the incident.

Frequently Asked Questions

1. Is my company's UTR confidential?

Your company UTR is not normally published on the public Companies House register, but people who can access your HMRC letters or tax documents may see it. Treat it as confidential business information rather than a public identifier.

2. Can someone find my UTR using my company name?

Not ordinarily through the public Companies House register. The register provides company information such as the company registration number, while the UTR is an HMRC tax reference. Someone may still obtain it if it appears in documents they can access.

3. Can someone steal my company using my UTR?

Knowing the UTR alone does not give someone ownership of your company or automatic access to its HMRC account. However, it could be used alongside other information in an impersonation or fraud attempt, so it should be protected.

4. Should I give my company UTR to my accountant?

Yes, when it is needed for legitimate work such as managing Corporation Tax matters. Make sure the accountant is genuine and use the proper HMRC authorisation process. Do not share your personal login credentials.

5. Is a company UTR the same as a company registration number?

No. HMRC issues the UTR for Corporation Tax purposes. Companies House issues the company registration number to identify the incorporated company. The registration number is public; the UTR is not normally displayed on the public register.

6. Can a registered office provider see my UTR?

It depends on the service and how the provider handles incoming post. Because HMRC sends the UTR to the company's registered business address, a provider that receives or processes the letter may be able to see it. Check the provider's mail-handling arrangements.

7. What should I do if my UTR has been shared accidentally?

Assess what information was exposed, ask the unintended recipient to delete it where appropriate, and check whether account credentials or other sensitive documents were also disclosed. If you suspect fraud or unauthorised account access, contact HMRC and secure the relevant accounts.

8. Can I change my company UTR if it is no longer private?

Do not assume that a UTR can or should be changed simply because someone has seen it. It identifies the company's Corporation Tax record. Contact HMRC if there has been misuse or suspected fraud so it can advise on the appropriate steps.

Conclusion

Someone else can see your company's UTR if they have access to your HMRC correspondence, tax documents or relevant business records. However, the number is not normally available through the public Companies House register. Your company UTR is an important tax identifier, but it is not a password and does not automatically grant access to your HMRC account. The best approach is to share it only when necessary, use secure channels, protect your tax records and review who is authorised to manage your company's affairs.

For UK founders and international business owners, good information management is part of running a compliant company. Keeping your UTR, online credentials and official correspondence secure helps reduce avoidable risks while still allowing accountants and other legitimate advisers to do their work.