Sharon Ayres
Partner
Article
5
Companies House has issued guidance on standard industrial classification (SIC) code accuracy following new powers introduced by the Economic Crime and Corporate Transparency Act ("ECCTA"). This move is interesting; it is part of the new 'gatekeeper' role now undertaken by Companies House to ensure that all details on the Companies House website are correct.
SIC codes may previously have been seen as relatively unimportant, serving mainly to provide Companies House with statistical data on industry trends. The new post highlights the importance being attributed to the SIC code.
SIC codes are mandatory for all companies. Every company registered at Companies House must provide at least one ECCTA has introduced new enforcement powers enabling Companies House to challenge, reject or remove information that appears incorrect, inconsistent or misleading. This new guidance emphasises that this power applies to SIC codes in the same way as to any other filed information.
Companies House has identified the use of dormant or non-trading SIC codes by actively trading companies as one of the most common discrepancies on the register, and one that is likely to attract scrutiny under its new powers. Where a SIC code does not reflect a company's actual activity, the company may experience filing rejections or delays whilst discrepancies are investigated.
Companies must ensure their SIC code continues to reflect their actual business activity. If the business activity of the company has changed since incorporation, the SIC code must be changed.
To update a SIC codes companies must file a confirmation statement, noting that the annual fee for a confirmation statement is payable only once within any 12-month period.
Companies House posed the following three questions to help companies:
The Companies House guidance blog can be accessed now.
For advice on SIC code accuracy or any other ECCTA queries, contact Sharon Ayres, Amar Adatia or your usual Gowling WLG contact.
NOT LEGAL ADVICE. Information made available on this website in any form is for information purposes only. It is not, and should not be taken as, legal advice. You should not rely on, or take or fail to take any action based upon this information. Never disregard professional legal advice or delay in seeking legal advice because of something you have read on this website. Gowling WLG professionals will be pleased to discuss resolutions to specific legal concerns you may have.
Gowling WLG is an international law firm comprising the members of Gowling WLG International Limited, an English Company Limited by Guarantee, and their respective affiliates. Each member and affiliate is an autonomous and independent entity. Gowling WLG International Limited promotes, facilitates and co-ordinates the activities of its members but does not itself provide services to clients. Our structure is explained in more detail on our Legal Information page.
© 2026 Gowling WLG All rights reserved.