How to Choose SIC Code UK for Your Business
Choose SIC code UK correctly when setting up your company. Doing this helps Companies House and other organisations clearly understand what your business does. This guide shows you how to select the right code, why it matters, and how to keep it up to date as your business evolves.
When you set up a company in the UK, you must select a Standard Industrial Classification SIC code. The Office for National Statistics defines this system and uses five digit codes to categorise businesses by their economic activity.
In simple terms, you need to tell Companies House what your business does. You can choose from over 600 SIC codes, and you must select at least one that reflects your activities accurately. These choices help build a clearer picture of how businesses operate across industries and allow organisations to track trends within the UK economy.
Why SIC Codes Matter
SIC codes do more than meet a registration requirement. Government bodies and organisations collect and use this data to assess industry performance.
When you assign the correct SIC code, your business helps build national statistics that show growth patterns, sector changes, and overall economic health. Policymakers often use this data to guide decisions and future planning.
How to Select the Right SIC Code
Start by reviewing the official list of SIC codes. The system groups codes into 21 main industry categories, then breaks them down into more detailed sectors covering specific trades and services.
Take time to explore these groupings carefully. Your chosen code should reflect your business as accurately as possible.
Using Multiple SIC Codes
If your business carries out more than one activity, you can select up to four SIC codes. This approach gives a more complete view of your operations.
Businesses that offer a mix of services or operate across different sectors often benefit from using multiple codes, as this reflects the full scope of their work.
SIC Codes for Dormant or Non Trading Companies
You must include a SIC code even if your company does not trade. Most dormant companies use code 99999, while non trading businesses often use 74990. This keeps company records complete and compliant.
Real World Examples
Looking at how businesses apply SIC codes can make the process clearer.
• A manufacturing business that operates across several production areas uses multiple SIC codes to cover plastic products, electronic components, and related activities.
• A long established company with diverse operations uses all four available SIC codes, covering manufacturing, property letting, and head office functions.
• An organisation that supports individuals into employment uses a single SIC code that reflects its focus on education services.
Using Other Companies as a Guide
You can view SIC codes on public company profiles, which makes them useful for guidance. If you feel unsure, search for similar businesses and review the codes they use.
For example, a coffee shop that also sells records might review a similar business and find codes linked to retail sales of beverages in specialised stores.
Updating Your SIC Code
If you select the wrong SIC code or your business activities change, you can update it when you file your next confirmation statement.
If you need to make a change sooner, submit a confirmation statement early to reflect the update.
Keeping Your Business Information Accurate
Keep your company records accurate at all times. Clear information helps clients, partners, and regulators understand your business.
You can complete most updates, including SIC code changes, quickly online, which makes it easy to stay compliant.
If you need help to choose SIC code UK correctly or want to update your company details, contact the team to find out more.