New on FinoLib · Volume V: Personal Finance
New on FinoLib, my finance education website: I have published an article called Types of Personal Insurance: Health, Life, Auto and Umbrella, from Volume V: Personal Finance. It is part 1 of a 3-part guide. Here is what the article explains, written as a short expert briefing; the full piece, with every worked example, is one click away.
The idea in plain words
Insurance swaps a small, certain cost for protection from a loss that could wreck you. So insure what you could not survive, and pay for what you could. That means health coverage, income protection if you can’t work, high liability limits, a home insured for what it would cost to rebuild, and life insurance only if someone depends on your income. Insurers expect to pay out less than they collect, so choose deductibles high enough that small losses come from your emergency fund rather than from higher premiums.
Key points
■Federal rules let a health insurer spend up to 15–20 cents of each premium dollar on costs other than care (8.1: What Insurance Is For, at Household Scale).
■In the 8.2 example the HDHP beats the PPO by $950–$1,680 in light and moderate years and loses by $1,310 in a catastrophic one.
■Social Security pays disability benefits only if you cannot earn more than $1,690 a month (2026) at any job for at least a year, so a private or group policy is the real protection (8.4).
■A $5,000 home deductible beats a $1,000 one unless you claim more often than once every 9½ years; the average insured home claims about once every 19 (8.5).
A closer look
Vol. III’s Part 1 explained insurance institutionally: risk pooling and the law of large numbers — an insurer collects small, certain premiums from many people to cover the large, uncertain losses of the few who experience them. At household scale, the same logic answers a simple question: which risks are worth transferring to a pool, and which are cheaper to simply self-insure?
Part 1.4 already drew this line once — an emergency fund is “insurance you sell yourself” for risks too small, too frequent, or too specific to insure economically. The insurance in this Part is the other half of that same logic: risks large enough that self-insuring would be financially devastating — a house burning down, a lawsuit after a car accident, the loss of a primary income for years — belong with an actual insurer, not a savings account.
Five terms decide what a health plan costs to use, and a sixth decides where you can use it:
A worked example
Worked Example — One Year, Two Plans, Three Levels of Care
The plans. The household’s current plan from Part 1.6: Paychecks Decoded is the PPO: $100 a paycheck ($2,600 a year), $500 deductible, $30 office-visit copay, 20% coinsurance, $3,500 out-of-pocket maximum. The HDHP alternative (illustrative): $40 a paycheck ($1,040 a year), $2,000 deductible, 20% coinsurance after it, $7,000 out-of-pocket maximum, a $500 employer deposit to the HSA, and a $2,000 HSA contribution by the household through payroll. The tax value. Premiums and payroll HSA contributions skip federal income tax (22% at the margin) and Social Security and Medicare tax (7.65%) — 29.65% in all.
Under the hood
Under the Hood: Why Insurance Costs More Than the Losses It Pays
A premium covers the pool’s expected claims, the insurer’s costs (sales, claims handling, overhead, taxes) and a return on the capital held against bad years, so the average policyholder always gets back less than they pay. Health insurance is the one line where federal law caps the gap: an insurer must spend at least 85% of large-group premiums, and 80% of individual and small-group premiums, on care and quality improvement, or rebate the shortfall (45 CFR §158.210).
Why It Matters
The right test for any insurance purchase is severity, not probability. Extended warranties on a $600 appliance are a bad deal precisely because even a total loss is affordable without insurance; a $2 million liability judgment after a car accident is not, even though it’s far less likely to happen at all. Every subsection below applies this same test to a different category of risk.
What the Research Says: People Overpay to Insure Small Losses
In about 50,000 homeowners policies from one insurer (Justin Sydnor, American Economic Journal: Applied Economics, 2010), most customers in the group studied in detail chose deductibles below $1,000. Those who took $500 paid about $99.85 a year more than a $1,000 deductible would have cost, while filing about 4.3 claims per 100 policies a year: an expected benefit of 4.3% × $500 = $21.50, so they paid 4.6 times its value. Sydnor found the risk aversion this implies implausibly large.
What the full article covers
The full article includes worked examples, a look under the hood at the mechanics, a recap, a reveal-on-click quiz and the official sources behind every figure.
Volume V: Personal Finance
Read the full article on FinoLib
The complete article, Types of Personal Insurance: Health, Life, Auto and Umbrella, with every worked example, diagram, quiz and source, is free to read in Volume V, Personal Finance on finolib.com.
Explore the Finance Education Series: Vol. II — Capital Markets · Vol. I — Global Economy · Vol. III — Finance Encyclopedia · Vol. IV — Finance Careers · Vol. V — Personal Finance