A limited company SIC code, or Standard Industrial Classification code, is a unique sequence of numbers that represents a particular business activity. When a new company is incorporated, at least one SIC code must be provided to Companies House to classify the type of trade carried out by the business.
The Office for National Statistics and other government agencies use SIC codes to collate important data about the various types of businesses that are operating and trading within the UK.
Where to find your limited company SIC code
You can find your limited company SIC code (or codes) in the latest full list of SIC codes, which is available to view online from the Office for National Statistics (ONS). A condensed list of SIC codes is available on the Companies House website. You must use the appropriate SIC code(s) from the condensed list when you file an annual confirmation statement.
If your company is using an old SIC code from the previous 2003 version of codes, you must search the SIC Conversion Table to find the 2007 equivalent. You should provide the new code(s) on your next confirmation statement.
How many SIC codes can I use?
You must provide at least one limited company SIC code during the incorporation process, even if your company is dormant (not trading). This is usually sufficient for most businesses. However, you may use up to four SIC codes if your business carries out various activities that cannot be classified by just one code.
Can I change my limited company SIC code?
You can change your SIC code(s) at any time if your principal business activities change. Simply find the appropriate SIC code from the condensed list (or Conversion Table, if applicable) on the Companies House website.
You must report this change on your next confirmation statement. Alternatively, you can update your limited company SIC code on your confirmation statement immediately. This can be carried out free of charge through Companies House WebFiling or 1st Formations Online Company Manager.
What happens if I provide the wrong SIC code for my limited company?
Providing the wrong SIC code is not a problem. You will just have to change it when it’s time to deliver a confirmation statement. Alternatively, you can amend the code immediately by updating your statement early.
What SIC code should I use if my company is dormant or non-trading?
Dormant companies should use SIC code 99999. Non-trading companies should use SIC code 74990.