The three (and four) sectors of industry (spec 1.1.2)
Primary extracts, secondary makes, tertiary serves β quaternary knows.
Businesses are classified by what they do, not by what they sell. The four sectors of industry:
| Sector | What it does | Named examples |
|---|---|---|
| Primary | Extracts raw materials from the earth or sea | Farming, fishing, forestry, mining, oil/gas extraction |
| Secondary | Processes or manufactures raw materials into finished or semi-finished goods | Car factories, bakeries, construction, steel mills, textile mills |
| Tertiary | Provides services to consumers and other businesses | Retail, banks, restaurants, transport, hospitals, schools, tourism |
| Quaternary | Knowledge-based services β R&D, IT, consultancy, financial analytics | Software firms, biotech R&D, management consultancies |
Edexcel's emphasis. The spec lists primary, secondary, tertiary; quaternary is a useful extension for A*-level analysis but the 4BS1 mark schemes accept "tertiary" for knowledge-based services unless the question explicitly distinguishes them.
Classification by activity, not by product.
- A car factory = secondary (manufactures).
- The car dealership = tertiary (sells/services).
- The same business can have operations in multiple sectors β e.g. a coffee company that owns plantations (primary) + processing plants (secondary) + retail cafΓ©s (tertiary). This is called vertical integration (covered in expansion / operations).
Edexcel tip. Questions often give a description and ask you to state the sector and justify it in one phrase β e.g. "This is a secondary-sector business because it converts cotton (raw material) into clothing (finished goods)." The justification is the mark.
- Primary: extract raw materials.
- Secondary: manufacture / process them.
- Tertiary: provide services.
- Quaternary: knowledge-based services (subset of tertiary in 4BS1).
- Classify by activity, not product; many firms span sectors.
See the full worked example for classification of businesses β