Last updated May 18, 2026 and written by Tom Richardson

How to Register for Companies House WebFiling

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Key Takeaways

  • After your company is formed, you need to register for Companies House WebFiling separately, even though your company is automatically registered.
  • Start by entering your email address, and they will send you a 6 digit security code you can use to begin creating your account. Then you can choose how you would like to receive security codes in the future - via text message or authenticator app.
  • Next, apply for an authentication code, even if your company already has one. Enter your company details and move on to the next step.
  • During the final step, ignore the message saying an authentication code already exists. Just click "submit" to proceed.
  • After submitting, check your email for the security code. You can then log in to WebFiling and start managing your filings.

How do I register for WebFiling?

Once you have completed the company formation process with us your company is automatically registered for Companies House WebFiling. You, however, are not yet registered for WebFiling.

To register yourself click here and choose the “Register” option. You then follow a three step process:

1. “Apply for a security code”

This first step just requires you to enter and then confirm your email address.

2. “Apply for an authentication code”

As part of the registration process Companies House want you to apply for an authentication code even though your company already has one. Go ahead and enter your Company information, when you click “continue” you will be directed onto step 3.

3. “Confirm your registration”

The first thing you will notice here is the following text “An authentication code will NOT be issued as a result of this application. An authentication code for xxxxxx already exists and was previously posted to the Registered Office Address”.

This is not a rejection note, simply ignore this and choose the “submit” option.

If you now check your emails you will find that the security code has been emailed to you. You can now “sign in” here.

FAQs

How do I register for Companies House WebFiling?

To register for WebFiling, visit the registration page and apply for a security code by entering and confirming your email address. Then, apply for an authentication code, even if your company already has one, and complete the registration by submitting your details.

Do I need to register for WebFiling separately from company formation?

Yes, while your company is automatically registered with Companies House after formation, you still need to register for WebFiling separately to manage your filings online.

What is the authentication code used for in the WebFiling registration?

The authentication code is a security feature used to verify your company information and allow you to access and manage your company filings online. Even though your company already has an authentication code, you need to apply for one during the registration process.

What should I do if I see the message "An authentication code already exists"?

If you see this message during the registration process, ignore it. This simply means the authentication code was previously sent to your company’s registered office address. Proceed by submitting your registration.

How will I receive the security code for WebFiling?

Once you complete the registration steps, the security code will be sent to the email address you provided during the registration process. You can then log in to WebFiling using this code.

Can I access Companies House WebFiling after completing registration?

Yes, after receiving your security code via email, you can log in to WebFiling to start managing your company filings online.