Compounding

How it works

Small consistent gains accumulate into extraordinary results over time — in finance, skills, relationships, and knowledge.

This model helps you recognise situations where this pattern is at play and adjust your thinking accordingly. Understanding it does not make you immune, but it gives you a framework for catching it in action and making better decisions as a result.

Case study: How Warren Buffett made 99% of his wealth after age 50

Warren Buffett’s net worth at age 30 was $1 million. At 50, it was $67 million. At 60, it was $3.8 billion. At 90, it was over $100 billion. The pattern is staggering: 99.7% of his wealth was accumulated after his 50th birthday. More than 96% was accumulated after his 60th birthday.

Buffett didn’t become a better investor at 50. His average annual return has been remarkably consistent across decades. The difference is purely mathematical: compounding. At 20% annual returns, $1 million becomes $67 million in 25 years. That $67 million becomes $3.8 billion in another 20 years.

The lesson isn’t about investing — it’s about any domain where gains compound. Skills, relationships, knowledge, and reputation all follow compounding dynamics. The early years feel slow. The later years feel explosive. But the rate of improvement never changed — only the base it’s compounding from.

When to use it

Apply this model whenever you notice its pattern appearing in your decision-making, your team’s behaviour, or the systems around you. It is especially valuable in high-stakes situations where the cost of this error is significant.

Try it now

Think of a recent decision or situation where this model might have been relevant. How would your approach have changed if you had explicitly considered it?