UK SIC code reference

Every UK limited company picks one to five SIC codes when it incorporates. Below: the highest-volume codes used by UK businesses, grouped by sector. Each page explains what the code covers, related codes, regional clustering, and how to find companies under it on Companies House.

Professional services

70229Other management consultancy activities (not financial)~340,000 active UK ltds78101Activities of employment placement agencies~32,000 active UK ltds85590Other education n.e.c.~38,000 active UK ltds82990Other business support service activities n.e.c.~95,000 active UK ltds73110Advertising agencies~28,000 active UK ltds86900Other human health activities~42,000 active UK ltds81210General cleaning of buildings~28,000 active UK ltds

Software, IT, and information

62012Business and domestic software development~110,000 active UK ltds62020IT consultancy activities~95,000 active UK ltds

Finance and insurance

66220Activities of insurance agents and brokers~12,000 active UK ltds64191Banks~700 active UK ltds66300Fund management activities~3,400 active UK ltds65120Non-life insurance~1,200 active UK ltds

Accountancy and legal

69201Accounting and auditing activities~45,000 active UK ltds69101Solicitors~22,000 active UK ltds

Construction and trades

41100Development of building projects~85,000 active UK ltds43210Electrical installation~95,000 active UK ltds43221Plumbing, heat and air-conditioning installation~65,000 active UK ltds

Real estate and property

68100Buying and selling of own real estate~95,000 active UK ltds68320Management of real estate on a fee or contract basis~32,000 active UK ltds

Retail, e-commerce and wholesale

47910Retail sale via mail order houses or via the internet~135,000 active UK ltds46900Non-specialised wholesale trade~58,000 active UK ltds47710Retail sale of clothing in specialised stores~22,000 active UK ltds

Hospitality and leisure

55101Hotels and similar accommodation~14,000 active UK ltds56101Licensed restaurants~75,000 active UK ltds

Logistics and transport

49410Freight transport by road~28,000 active UK ltds

Manufacturing

25620Machining~18,000 active UK ltds30300Manufacture of air and spacecraft and related machinery~620 active UK ltds

Health, education, agriculture, other

85590Other education n.e.c.~38,000 active UK ltds86900Other human health activities~42,000 active UK ltds01619Support activities for crop production~7,500 active UK ltds

Don't see a code? Leadistry indexes all 730+ UK SIC codes. The list above is just the highest-volume ones with curated guidance, search any 5-digit code in the Leadistry search builder.

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