Cost leadership is a strategy in which a company becomes the lowest-cost producer in its industry. It does not necessarily mean selling at the lowest price, though that is often the case. It means having a cost structure that allows the company to earn higher margins than competitors at the same price, or to undercut them and still make a profit.

The strategy was described by Michael Porter as one of three generic strategies, alongside differentiation and focus. Companies that succeed at cost leadership typically achieve it through economies of scale, efficient supply chains, tight overhead control, and process innovation. Walmart, Ryanair, and Costco are often cited as examples.

Sources of cost advantage:

• Scale: producing more reduces per-unit cost.
• Efficiency: streamlined operations and automation.
• Bargaining power: negotiating lower input prices.
• Location: cheaper labor or proximity to materials.

Cost leadership is not easy to sustain. Competitors can copy efficiency gains. Technology shifts can erase advantages. And a relentless focus on cost can lead to cutting corners on quality or employee treatment, which creates new risks. The strategy works best when the cost advantage is durable and the company does not compete on anything else.