finance

Pareto Principle (80/20 Rule)

Roughly 80% of effects come from 20% of causes. The lens that reveals where leverage lives.

Definition

The Pareto Principle - the 80/20 rule - observes that in many systems, roughly 80% of effects come from roughly 20% of causes. In business: 80% of revenue often comes from 20% of customers, 80% of profit from 20% of products, 80% of problems from 20% of customers, 80% of value from 20% of activities. The principle is descriptive (the actual ratios vary) but the lens is powerful: it forces you to ask 'which 20% creates 80% of the outcome?' and focus there.

In your business

  • Run a 20/80 audit of customers - which 20% drive 80% of profit? Serve them better, raise prices on the rest
  • Audit your time the same way - the 20% of activities that drive 80% of results
  • Cut the bottom 20% of customers, products, activities annually - they consume disproportionate resources

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