How Insurers Make Money
An insurer collects premiums today and pays claims later. It earns from pricing risk well and from investing the money it holds in between.
Why this matters for beginners
Insurers can grow fast simply by underpricing risk, and the damage only appears years later when claims arrive. The combined ratio exposes that quickly.
Main explanation
Premiums are collected up front, claims are paid later. The money held in the meantime is called the float, and investing it is a genuine second income source.
The combined ratio adds claims and expenses and divides by premiums. Below one hundred percent means underwriting made a profit; above it means the insurer relies on investment income.
Growth is easy to fake in insurance. Cutting prices wins business immediately and produces losses only when claims mature, so rapid growth deserves suspicion.
Reserves are estimates of future claims. Under-reserving flatters profits today and forces painful corrections later, which is why reserve development is worth watching.
Example using a real company
An insurer with a combined ratio of 95 percent earns five cents of underwriting profit per premium unit, plus whatever its investments earn on the float.
- →Combined ratio 92 percent: disciplined underwriting.
- →Combined ratio 108 percent: underwriting loses money and investments must cover the gap.
Common beginner mistakes
- ✕Treating premium growth as good news without checking pricing.
- ✕Ignoring the combined ratio.
- ✕Overlooking large single events that can hit results in one quarter.
Key terms
- Combined ratio
- Claims plus expenses divided by premiums earned.
- Float
- Premiums held before claims are paid, available to invest.
- Reserves
- Estimated amounts set aside for future claims.
Key takeaways
- 01Underwriting discipline matters more than premium growth.
- 02A combined ratio below one hundred percent is an underwriting profit.
- 03Reserve estimates can hide or reveal problems.
Check yourself
- 01A combined ratio below one hundred percent means underwriting was profitable.
- 02Fast premium growth always indicates a strong insurer.
- 03Insurers can invest premiums before claims are paid.
Try the concept on a real company
Look at an insurer in the Analyzer and consider how stable its results have been across different years.
Educational examples only. Not buy or sell recommendations.