Learn / Part 4 · Protecting What You Have
Insurance: What to Protect, What to Absorb
What should you insure, and what should you absorb?
In brief
Insurance is best for losses that would ruin you, and poor value for small, affordable ones. Premiums are higher than average claims, so use insurance where the protection matters more than the price.
Key ideas
The ruin test
If a loss would cause lasting harm, transfer it. If you can pay it from savings, consider absorbing it.
Make an insight card →Loading is the price of certainty
Premiums include costs and profit, so on average you pay more than you get back.
Make an insight card →Excess is a tool
Raising the excess lowers the premium and moves small losses where they belong.
Make an insight card →Try it
Insure or absorb?
Insurance is best at transferring losses that would ruin you. For small, affordable losses, paying the premium usually costs more than it pays back on average. Test a policy on both measures.
Open the full page: formula, variables, worked example and cautions →
Red flag
Selling you cover for something trivial, or bundling insurance into a loan without asking.
Ask before you sign
- What does this exclude, and in what situations would it refuse to pay?
- What commission do you receive?
Do this week
Run the insure-or-absorb test on your two most expensive policies.
Try it · 10–45 minutes
List your policies with premium, excess and what each protects against.
See it in a life
Cases that bring this chapter to life
Connected ideas
Where else this shows up
Pause and reflect
Private to this device. Nothing is sent anywhere.
Words worth knowing
- Insurance
- A contract that moves the financial risk of a defined loss to an insurer in return for a premium.
- Premium
- The price paid for insurance cover.
- Excess (deductible)
- The part of a loss that you pay before an insurer pays the rest. A higher excess lowers the premium.
- Loading (insurance)
- The amount by which a premium exceeds the average claim cost; covers the insurer’s costs and profit.
- Expected value
- The average outcome of an uncertain event, found by weighting each outcome by its probability.
Companion notes written for this website, based on the topics of Chapter 17. They explain ideas and do not reproduce the book. General information, not personal advice.