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Economies of scale

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What are economies of scale?

Economies of scale are cost advantages that companies experience when they increase their level of production, resulting in a decrease in the average (per-unit) cost of production. As businesses grow and produce more, they can spread fixed and variable costs over a larger number of units, resulting in greater efficiency and lower costs per unit.

Key takeaways

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Cost advantages through size
Larger companies or those producing at higher volumes can achieve lower per-unit costs than smaller competitors.
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Types of economies of scale
  • Internal economies of scale: Cost reductions achieved within a single company, such as through better management, bulk purchasing, or advanced technology.
  • External economies of scale: Cost savings that benefit all firms in an industry as the industry grows, such as improved supplier networks or industry-specific infrastructure.
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Competitive advantage
Economies of scale enable businesses to offer lower prices, increase profits, and capture market share from less efficient competitors.

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Limits and diseconomies

There is a limit to economies of scale. If a company becomes too large or inefficient, costs per unit can start to rise again, a phenomenon known as diseconomies of scale.

Why do economies of scale matter?

Economies of scale enable companies to lower their per-unit costs, resulting in higher profitability that can be reinvested in innovation, research, or expansion. Large-scale producers also gain greater market power, allowing them to negotiate better terms with suppliers and distributors, and weather price wars or economic downturns more effectively. These efficiencies often translate into consumer benefits such as lower prices and improved products. Additionally, economies of scale can drive industry growth and consolidation, leading to the rise of dominant players in sectors such as supermarkets, technology, and manufacturing.

How economies of scale work

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Increase output

As production volume increases, fixed costs (such as rent, machinery, and salaries) are spread over a greater number of units, thereby reducing the cost per item.

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Bulk purchasing

Large orders of raw materials or components often come with discounts, further lowering costs.

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Specialisation and technology

Larger firms can invest in specialised labour, advanced technology, and automation, increasing efficiency and reducing waste.

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Operational efficiencies

Functions such as marketing, accounting, and logistics become more efficient at scale, spreading costs across a larger number of products.

Impact on business and industry

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Ability to offer lower prices and outcompete rivals.

Higher margins due to lower average costs.

More resources for R&D and product improvement.

Easier entry into new markets and segments.

Better ability to withstand economic downturns.

Impact on financial statements

Real-world examples

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Case study: Supermarkets

Supermarkets achieve economies of scale by purchasing products in large quantities, allowing them to negotiate lower prices from suppliers. This reduces their per-unit costs, enabling them to offer lower prices to consumers and gain a competitive advantage over smaller retailers.


Frequently asked questions about economies of scale?

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Bulk purchasing, specialisation, advanced technology, managerial efficiencies, and spreading fixed costs over more units.
Up to a point. Beyond the optimal scale, diseconomies can occur, resulting in increased per-unit costs.
Internal economies arise within a single company; external economies benefit all firms in an industry or region.