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What is an AD01 Form?

Updated: Nov 10, 2023

Form AD01 is a new form used by UK business owners who want to change their registered office information. It was first introduced on October 1, 2009. With the Companies Act 2006, form AD01 replaced form 287 which was used for the same purpose. Any change in the UK company registered office made after September 2009 must be submitted on form AD01.


AD01 Form


According to the Companies House Forms Guidelines, Form AD01 better describes what it is supposed to do. The "AD" in the name is also a code and an abbreviation for "address." In short, it is a greeting. In this case due to a change of registered office. The "01" in the name means that the address of the control centre must be changed. It is the most used document in Companies House.


When completing the form, an entrepreneur must provide information, including the business number, the full company name, the new location, and the signature of a person authorized by the company to change the information.


Understanding the Basics of HMRC AD01 Form

The HMRC AD01 form plays a pivotal role in the corporate landscape of the United Kingdom, being a critical document in the process of company creation and administration. Its primary purpose is to notify Companies House of a change in a company's registered office address. This form is integral for maintaining up-to-date records, which is crucial for legal compliance and efficient business operations​​​​.


The Importance of Updating the Registered Office Address

A company's registered office address is more than just a line in the paperwork. It serves as the official point of contact for governmental bodies, including HMRC and Companies House. Keeping this information accurate and current is vital for receiving important legal and tax documents. Therefore, the AD01 form becomes essential whenever there's a change in this address​​.


Historical Context of the AD01 Form

The AD01 form was introduced on October 1, 2009, under the Companies Act 2006. It replaced the form 287, which previously served the same purpose. Since September 2009, any changes to a UK company's registered office must be submitted using the AD01 form. This transition marked a significant step in modernizing the process of updating company information in the UK​​. However, now you can also change your address online.


Specifics of Filing the AD01 Form

When completing the AD01 form, certain key information is required. This includes the company number, company name, the new registered office address, and the signature of a director authorizing the amendment. Notably, there is no cost associated with filing the AD01 form, making it accessible for all businesses to comply with this requirement​​.



Important Considerations for Using the AD01 Form


Deadline for Submission: Companies must notify Companies House within 14 days of their address change using the AD01 form. Adhering to this timeline is crucial to avoid non-compliance issues​​.

Public Availability of Information: If a company uses a home address as its registered office, it is important to note that this address becomes publicly available. Companies should consider this factor when choosing their registered address​​.

Online vs. Paper Filing: The AD01 form can be filed either online or via paper. However, the online service is recommended for a quicker update of information. Paper forms take longer to process, and companies part of the PROOF (PROtected Online Filing) scheme are advised not to use the paper form​​.


In summary, the AD01 form is a fundamental aspect of maintaining a company's legal and administrative health in the UK. Understanding its purpose, requirements, and the process for submission is essential for all business owners and directors. This form ensures that a company's registered office address is accurately reflected in official records, which is a key component of corporate transparency and governance.


How to Fill Different Sections of the AD01 Form

How to Fill Different Sections of the AD01 Form: A Step-by-Step Guide

The AD01 form is an essential document for UK businesses, used to notify Companies House of a change in the registered office address. Filling out this form accurately is crucial for maintaining compliance and ensuring that all official communications are received at the correct address. Here’s a detailed guide on how to fill each section of the AD01 form:


Section 1: Company Details

  1. Company Name: Enter the full, legal name of your company as registered with Companies House. This must match your official records to ensure proper identification.

  2. Company Number: Your company number is a unique identifier assigned by Companies House when your company was formed. Enter this number accurately.


Section 2: New Registered Office Address

  1. Address Line 1: Enter the primary address line of your new registered office. This should include the building number and street name.

  2. Address Line 2 (if applicable): If your office location requires additional address details like a suite or unit number, include it here.

  3. Town/City: Specify the town or city where your new registered office is located.

  4. County: If applicable, include the county name.

  5. Postcode: The postcode is crucial for mail delivery and location verification. Ensure this is entered correctly.

  6. Country: Specify the country within the UK where your office is located (England, Wales, Scotland, or Northern Ireland).


Section 3: Date of Change

  1. Date: Indicate the date when the new registered office address took effect. Remember, you have 14 days from this date to file the form with Companies House.


Section 4: Statement of Compliance

  1. Declaration: This section requires a declaration that the company is complying with the requirements of the Companies Act. By signing, you confirm that the information provided is accurate and complete.

  2. Signature: The form must be signed by a company director or secretary. The signature authorizes the change and confirms responsibility for the accuracy of the information.


Section 5: Submission and Checklist

  1. Review: Before submitting, review the entire form to ensure all details are accurate and complete.

  2. Submission: You can submit the form online through the Companies House WebFiling service or send a paper copy by post. Online submission is recommended for faster processing.


Final Tips for Completing the AD01 Form

  • Accuracy is Key: Any errors in the form can lead to delays or rejection. Double-check all details, especially numbers and spellings.

  • Record Keeping: Keep a copy of the completed form and the submission confirmation for your records.

  • Timeliness: Submit the form within the required timeframe (14 days from the change) to avoid penalties.

  • Seek Advice if Needed: If you're unsure about any part of the form, it's advisable to seek guidance from a legal or accounting professional to ensure compliance.


By following these steps, you can ensure that your AD01 form is filled out correctly and efficiently, helping your business maintain compliance with Companies House requirements. Remember, the registered office address is a critical piece of information for your company, and keeping it updated is key to smooth business operations.



How to Submit an AD01 Form?

It is important that a business owner provide all the information requested by Companies House on their AD01 form. The information requested would be the full company number, the full company name, the new location that replaces the old one, and the signature of the CEO authorizing the changes.

Another important point is that entrepreneurs do not have to pay anything to submit the AD01 form. Access to the form is available online, which can be accessed here.


Business owners who wish to change their business address should also note that Companies House will only consent to changes if a complete mailing address is provided on the form. The new address must also be directly in the UK. The address must not be a PO box address either.


Once completed, the form should be sent by certified mail to Companies House, Crown Way, Cardiff, CF14 3UZ. However, if a business owner wants to present it online, they can. All you need to do is register with Companies House WebFiling.


Changing the registered office of a business is easy as long as the business owner provides the correct information. The online option makes things much faster and better for those who are too busy to send certified mail.



Can I Use Any Address As My Registered Office?

If you are providing a registered office for a limited liability company, it must be a real address with a zip code. Unfortunately, this means that you cannot use a mailbox. Boxing address and Companies House do not accept them. If you are one of the many companies that have an accountant as their general secretary, you can use your home office as the address for your accountant. Companies House uses your registered office address to send important communications. Therefore, it is important that you have access to this address to be able to retrieve all documents without risk of obsolescence. You should also make sure that the registered address is on all the business documents that you use.


Company records showing shareholders and directors are normally kept at the company's registered office (although they may be disclosed to Companies House if archived elsewhere). If the address changes, you must notify Companies House that the documents have been moved to a new location, along with the contact details of the new registrar.



Strategic Considerations for Choosing a Registered Office Address


Selecting the Right Registered Office Address

The choice of a registered office address is not just a legal formality; it plays a strategic role in a company's operations and public image. When selecting an address, consider the following factors:


Legal Requirements: The address must be in the country where your company is registered (England and Wales, Scotland, or Northern Ireland).

Accessibility: Choose an address that is accessible for receiving official documents and legal notices.

Public Perception: The location can impact the company's image. A prestigious address may enhance the perception of the business.

Privacy Concerns: If using a home address, remember it will be publicly accessible. Some businesses opt for a service that provides an alternate address for public records to protect their privacy.


Changing Your Registered Office Address

While changing the registered office address is a routine process, it should be approached with consideration:


Frequency of Changes: Frequent changes might raise concerns among stakeholders and can be administratively burdensome.

Communicating with Stakeholders: Inform your stakeholders, including employees, clients, and suppliers, of any change in your registered office address.

Update Other Records: Beyond the AD01 form, update your address on all other business records and correspondences.



Implications of the Registered Office Address on Business Operations


Tax and Legal Implications: The registered office address can affect your tax liabilities and legal obligations.

Business Opportunities: Certain addresses might offer networking opportunities or proximity to key business areas, potentially benefiting the business.


Planning Ahead


Future Growth: Choose an address that aligns with your future business plans and growth strategies.

Cost-Effectiveness: Consider the cost implications, especially if opting for a prestigious address or a third-party service.


Long-Term Implications and Management of Registered Office Address


Ensuring Long-Term Compliance and Stability

Managing your registered office address effectively is crucial for long-term business success. Here's how to ensure compliance and stability:

  1. Consistent Monitoring: Regularly review and update your registered office address information to ensure it reflects the current situation.

  2. Staying Informed: Be aware of any changes in legislation or regulations related to registered office addresses and compliance requirements.

  3. Integrating with Business Planning: Consider your registered office address as part of your broader business strategy, including branding, legal compliance, and operational efficiency.


Role of the AD01 Form in Business Health

The AD01 form is more than just a means to update an address; it's a tool that supports the overall health of a business:

  1. Legal Health: Timely updates via the AD01 form ensure legal compliance, avoiding potential penalties and legal issues.

  2. Operational Health: A stable and appropriate registered office address facilitates smoother operations, including effective communication with stakeholders and receipt of important documents.

  3. Brand Image: An address in a prestigious or strategically beneficial location can enhance the company's public image and brand value.


Planning for Future Changes

Businesses evolve, and so might their address requirements. When planning for future changes:

  1. Anticipate Growth: Choose an address that can accommodate future growth and expansion needs.

  2. Flexibility: Consider the flexibility of your address in terms of scalability and adaptability to changing business needs.

  3. Risk Management: Be prepared for unforeseen circumstances that might necessitate an address change, and understand the process and implications of such changes.


The effective management of a registered office address, facilitated by the AD01 form, is a critical aspect of running a successful business in the UK. It plays a significant role in ensuring legal compliance, operational efficiency, and maintaining a positive brand image. By understanding the strategic importance of the registered office address and utilizing the AD01 form effectively, businesses can ensure their long-term stability and growth in a dynamic business environment.



The choice and management of a registered office address, as facilitated by the AD01 form, are more than just legal necessities. They are strategic decisions that can impact a company's operations, image, and growth trajectory. By understanding these considerations, businesses can make more informed decisions about their registered office address, ensuring it aligns with their overall business strategy and compliance requirements.




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