WebFiling service update

On Friday 13 March 2026, Companies House was made aware of a security issue which meant that a logged-in registered user of the WebFiling service could potentially access and change another company’s details without their consent after performing a set of specific actions. 

Companies House recognises that this incident will have caused concern and inconvenience to many of the companies and individuals who rely on their services, and Companies House has apologised:

Read the update on Companies House WebFiling security issue

Companies House has also published a regularly updated information and guidance page to address concerns. 

Closure of the online accounts and company tax return service

The online accounts and company tax return service closed on 31 March 2026. 

From 1 April 2026: 

• Annual accounts can be filed using software, Companies House web services or by paper.

• Company tax returns must be filed with HMRC using software.

Read more about the closure of the service

Identity verification: customer guidance

As you’ll be aware, the Economic Crime and Corporate Transparency Act has introduced new requirements for company directors and people with significant control (PSCs) to verify their identity with Companies House.  

Companies House recently published an article on LinkedIn which provides guidance on how to complete the process and top tips to help you stay compliant. This is a helpful resource for guiding customers through the new requirements and may be helpful to share with clients to support understanding. 

Further resources

Read ACCA’s guidance on ACSP/ID verification on the anti-money laundering hub