How Insurers Actually Make Money

Insurers earn two ways: underwriting profit and float. Underwriting profit means collecting more premium than claims plus expenses, measured by a combined ratio under 100.

Float is the pool of premiums held before claims are paid, money that gets invested for years, and on long tail lines float can rival the premium itself. Warren Buffett built an empire on cheap float from policies priced near break even.

When underwriting and investment both sour, insolvencies follow, which is why regulators watch reserves and capital so closely. The premium dollar travels a long road through reserves before it becomes either a claim or profit..