The Standard Industrial Classification (SIC) code system is a fundamental part of business classification in the UK. It provides a way for businesses, regulators, and analysts to group companies into industries based on their economic activity. SIC codes are used by Companies House, HM Revenue & Customs (HMRC), the Office for National Statistics (ONS), and other regulatory bodies to track business trends, ensure compliance, and conduct economic research.
If you own a business or are looking to register one, understanding SIC codes is essential. This guide explains what SIC codes are, how they are used, how to find the right SIC code for your business, and their significance in the UK business landscape.
What Are SIC Codes?
A SIC code is a five-digit numerical code that classifies businesses based on their primary economic activity. The UK uses the UK Standard Industrial Classification of Economic Activities (UK SIC 2007) system, which is the latest version and is used for official business classification.
SIC codes are required when registering a company with Companies House. They help identify a company’s industry sector, making it easier for authorities, investors, and analysts to understand what a business does.
Businesses can have multiple SIC codes if they operate in different sectors. However, they must select a primary SIC code that best represents their main business activity.
Why Are SIC Codes Important?
SIC codes play a significant role in business operations, regulation, and economic analysis. Some of their key uses include:
- Company Registration – When registering a business with Companies House, you must provide at least one SIC code to describe your industry.
- Business Classification – SIC codes help categorise businesses, making it easier for government agencies, analysts, and investors to understand the business landscape.
- Taxation and Compliance – HMRC uses SIC codes to assess tax obligations, eligibility for tax relief, and industry-specific regulations.
- Market Research and Economic Analysis – Businesses, researchers, and policymakers use SIC codes to study economic trends and make informed decisions.
- Access to Business Grants and Support – Some government grants and funding schemes are only available to companies in specific SIC code categories.
- B2B Marketing and Industry Networking – Companies use SIC codes to identify potential partners, suppliers, or clients within a particular industry.
Understanding SIC codes is particularly important for small businesses, as choosing the correct code ensures compliance with regulatory requirements and improves visibility in industry databases.
How to Find a Company’s SIC Code in the UK
If you need to find a SIC code for your business or another company, there are several ways to do so:
1. Use the Companies House Register
Companies House is the official registrar of businesses in the UK. It maintains a public database of all registered companies, including information about their name, registered address, directors, filing history, and SIC code.
To find a company’s SIC code using Companies House:
- Visit the Companies House Website – Go to the Companies House search page (https://find-and-update.company-information.service.gov.uk/).
- Enter the Company Name or Registration Number – Use the search bar to find the business you’re looking for.
- Open the Company Profile – Click on the company’s name to view its official registration details.
- Check the SIC Code – The SIC code is usually listed under “Nature of Business” in the company profile.
This method is particularly useful for checking the SIC code of competitors, suppliers, or potential partners. It also helps businesses ensure their own SIC classification is accurate and up to date.
2. Refer to the UK SIC 2007 Code List
The UK SIC 2007 classification system is the most recent version of the SIC coding standard used in the UK. It is an official list of all possible SIC codes, grouped by industry sector.
The UK SIC 2007 list can be accessed in multiple ways:
- Download the official PDF from the Office for National Statistics (ONS) or the Companies House website.
- Use an online SIC code directory that allows users to browse SIC codes by sector or keyword.
- Consult printed industry classification books, which are sometimes available in libraries or government offices.
For businesses that need to determine the correct SIC code for registration, this is one of the most reliable resources. It is particularly helpful for new businesses that need to choose an appropriate SIC code for their application with Companies House.
When using the UK SIC 2007 list, businesses should:
- Identify their main business activity.
- Look for the most relevant SIC code category in the list.
- Select the best-matching code (businesses can choose multiple SIC codes if needed).
This method is useful for businesses that want to classify themselves correctly and ensure their registration details comply with industry standards.
3. Check Your Business Registration Documents
If your company is already registered with Companies House, your SIC code will be included in several official documents. These documents may include:
- Certificate of Incorporation – The document issued when a company is officially registered.
- Annual Confirmation Statement (CS01) – A yearly update that confirms business details, including the SIC code.
- Tax Filings and VAT Registration Forms – HMRC often uses SIC codes for tax classification and sector-specific tax obligations.
- Business Licences and Permits – Some regulatory agencies require businesses to list their SIC codes when applying for permits.
To find your SIC code in existing business documents, follow these steps:
- Check your Companies House registration documents for the original SIC code.
- Review your annual Confirmation Statement (CS01), which includes the latest SIC classification.
- Look at your HMRC tax filings for SIC-related details used in financial and industry reports.
If your business has changed its activities over time, you may need to update your SIC code. This can be done by filing an updated Confirmation Statement (CS01) with Companies House.
4. Use an Online SIC Code Lookup Tool
If you are unsure which SIC code applies to your business, various online tools can help. SIC code lookup tools allow users to search by keyword, industry, or business activity to find the most relevant SIC code.
How to use an online SIC code lookup tool:
- Visit a SIC code lookup website – Several government and business classification websites provide SIC search tools.
- Enter your business activity or industry – Use specific keywords that describe what your business does.
- Browse the suggested SIC codes – The tool will provide a list of codes that match your search terms.
- Select the best fit for your company – Choose the SIC code that best represents your primary business activity.
Online SIC code lookup tools are helpful for:
- New businesses that need to find an appropriate SIC code for registration.
- Companies considering expanding into new sectors and needing additional SIC codes.
- Market research and competitor analysis to compare industry trends.
Although online lookup tools are convenient, businesses should verify their chosen SIC code with Companies House or the UK SIC 2007 list to ensure accuracy.
What Is a SIC Code Used For?
SIC codes serve multiple purposes in business administration and economic regulation. Some of their key applications include:
- Company registration with Companies House.
- Tax filing and industry-specific regulations enforced by HMRC.
- Employment and wage reporting for government surveys and economic analysis.
- Market research and business intelligence for identifying industry trends.
- Access to government funding, grants, and support schemes.
- Business networking and lead generation by identifying potential customers and suppliers.
Having the correct SIC code ensures that your business is classified properly for all these purposes.
SIC Code vs NAICS Code: What’s the Difference?
While the UK uses SIC codes, North America uses the North American Industry Classification System (NAICS). Some key differences include:
- SIC codes are five digits long, while NAICS codes are six digits.
- SIC codes are used in the UK and Europe, while NAICS codes are used in the USA and Canada.
- NAICS provides a more detailed classification system, while SIC codes are broader.
- UK businesses operating internationally may need to understand both systems.
However, for UK businesses that operate solely within the country, UK SIC 2007 codes are the only ones needed.
How to Classify a Business Using SIC Codes in the UK
To classify a business correctly using SIC codes, follow these steps:
- Identify the Primary Business Activity – Determine the main service or product your company provides.
- Find the Right SIC Code from the UK SIC 2007 List – Use the official SIC code list to find the category that best matches your business.
- Match Your Business to the Most Relevant SIC Code – If your business covers multiple industries, select the primary SIC code first, then add secondary codes as needed.
- Verify with Companies House or an Accountant – If unsure, consult a business advisor, accountant, or Companies House guidance.
Example SIC Codes for Different UK Industries
Manufacturing Companies
- 10110 – Processing and preserving of meat
- 11050 – Manufacture of beer
- 25990 – Manufacture of other fabricated metal products
Retail Businesses
- 47110 – Retail sale in non-specialised stores
- 47240 – Retail sale of bread, cakes, and confectionery
- 47710 – Retail sale of clothing in specialised stores
Each SIC code provides specific details about a business’s operations, ensuring proper classification.
SIC Code Lookup for Small Businesses in the UK
Small businesses often need SIC codes for:
- Registering with Companies House.
- Applying for government funding or tax relief.
- Classifying their business correctly in industry directories.
- Meeting regulatory and compliance requirements.
Small businesses can find their SIC codes using the Companies House lookup tool, UK SIC 2007 list, or by consulting a business advisor.
Resources for SIC Code Research in the UK
Businesses needing more information about SIC codes can access several resources:
- UK SIC 2007 Code List (PDF Download) – Available on government websites.
- Companies House SIC Code Lookup Tool – Helps find SIC codes for registered businesses.
- Business Directories – Contain SIC classifications for different industries.
- Industry Associations – Some trade bodies provide guidance on the correct SIC codes for their sector.
FAQ
1. How Can I Find a SIC Code?
To find a SIC code, you can use the Companies House Register, which lists SIC codes for all UK-registered businesses. You can also refer to the UK SIC 2007 Code List, available online, to find the most suitable classification for your business. If your company is already registered, check your business registration documents, such as incorporation records or tax filings. Alternatively, use an online SIC code lookup tool to search by industry or keywords.
2. How Do I Find a SIC Code Using Companies House?
To find a SIC code via Companies House, visit their website and search for a company by name or registration number. The SIC code will be listed under the “Nature of Business” section in the company’s profile. This method is useful for verifying your own SIC classification or researching competitors and industry trends.
3. What is a SIC Code and How is it Described?
A SIC code is a five-digit number used to classify businesses based on their main activity. Each code comes with a description that outlines the business type. For example, 47110 is for “Retail sale in non-specialised stores” (supermarkets), 11050 for “Manufacture of beer” (breweries), and 62090 for “IT service activities.” Businesses can select multiple SIC codes if they operate in different sectors.
4. What is the SIC Code for Construction Companies? (SIC Code for Construction)
Construction companies in the UK use different SIC codes based on their services. 41201 is for “Construction of commercial buildings,” 41202 for “Construction of domestic buildings,” and 42110 for “Construction of roads and motorways.” Other relevant codes include 42990 for civil engineering, 43210 for electrical installation, and 43999 for specialised construction. Selecting the correct SIC code ensures compliance and industry recognition.
Final Thoughts on SIC Codes in the UK
SIC codes remain an essential classification system for UK businesses. Whether registering a new company, filing taxes, or conducting market research, choosing the right SIC code is crucial.
Key Takeaways:
- All UK businesses must register with at least one SIC code when incorporating with Companies House.
- SIC codes help classify businesses for regulatory, tax, and industry purposes.
- The UK SIC 2007 system is the most up-to-date classification system used in the UK.
- Finding the right SIC code is easy using Companies House, the SIC list, or lookup tools.
- Choosing the correct SIC code ensures compliance and accurate industry representation.
Understanding and using SIC codes correctly can help UK businesses operate efficiently while staying compliant with regulatory and financial obligations.
