What Company Authentication Codes for Online Filing Mean for UK Firms
Companies House requires a company authentication code to file information online. This explainer uses official guidance to explain what changed, who is affected, and practical next steps in plain language.
What this means for filing online
To submit documents or update information online, UK companies must use a company authentication code. The code is a security link between a company and filing services. The guidance notes that over time the process has evolved (including new WebFiling accounts and alternative delivery options for overseas companies). If you file online, you will need to request or manage this code so you can access online filing tools and submit documents securely.
Who is affected
Most covered are UK-registered companies and, in some cases, overseas companies using the online filing system. Individuals who manage company filings should be aware that the authentication code is part of the login process. It may take several days to receive or renew the code, depending on the request method and the company’s circumstances.
Practical next steps
Key steps include: (1) Check if your company needs a new or updated authentication code; (2) Use the official service to request or manage the code; (3) Allow time for delivery. Can take up to several working days; (4) If you have recently changed your filing method or are using a new WebFiling account, review any updated guidance; (5) For overseas entities, follow the specific Find and update company information service route. Ensure you securely store the code and only share with authorized individuals.
Limits and questions
Guidance notes there may be updates and process changes over time. If you are unsure about which route applies to your company or the timing of code delivery, consult the latest official guidance or contact support via the official site. The page also records updates such as changes to delivery times and the introduction of new WebFiling accounts, which can affect how quickly you can file.
Which sources did Setup in Bahrain review?
Setup in Bahrain reviewed the following source material before preparing this explanatory article.
The links remain visible so readers can inspect the evidence, compare dates and context, and confirm current requirements with the relevant authority.
- gov.uk — evidence source reviewed for this article.
Information and responsibility notice: This article is general information based on the cited material available when published. It is not legal, tax, immigration, medical, financial, banking, or investment advice; it does not create a professional-client relationship; and it is not a guarantee of outcome, availability, accuracy, or eligibility. Rules, schedules, prices, and third-party information can change. Confirm material decisions with the relevant authority and an appropriately qualified adviser before acting.