insurance basics, one term per page
Twenty-four lessons on what insurance is, the premium, the deductible, exclusions, the copay, coinsurance, the out-of-pocket maximum, coverage limits, the claim, the adjuster, indemnity, subrogation, underwriting, the actuary, moral hazard, riders, term life, whole life, cash value, the beneficiary, liability, collision and comprehensive, the uninsured motorist, and the umbrella policy.
One term, one diagram, one honest page. That's a lesson.
insurance basics, one term per page
Twenty-four lessons on what insurance is, the premium, the deductible, exclusions, the copay, coinsurance, the out-of-pocket maximum, coverage limits, the claim, the adjuster, indemnity, subrogation, underwriting, the actuary, moral hazard, riders, term life, whole life, cash value, the beneficiary, liability, collision and comprehensive, the uninsured motorist, and the umbrella policy.
Set in Space Grotesk, Inter and JetBrains Mono (SIL Open Font License).
Every fact in this book is as the primary source states it, fetched and read during this build: the Wikipedia articles Insurance, History of insurance, Underwriting, Actuarial science, Deductible, Copayment, Coinsurance, Term life insurance, Whole life insurance, Life insurance, Vehicle insurance, Home insurance, Umbrella insurance, Reinsurance and Moral hazard, plus the NAIC consumer guide How Does Insurance Work and the Healthcare.gov glossary, all cached at build time and cited in each lesson's source line. This is general information about how insurance works, not advice on any specific policy; for your situation consult a licensed agent or your policy documents. Where two sources state different numbers, each is stated as its source states it, and every money figure is attributed to its source. Practical rituals this book states as its own plan (the order of the terms, the practice asks) are labeled as this book's plan and rest on mechanics from those sources. No product recommendations, no country-specific prices, no advice. An independent guide; not affiliated with or endorsed by Wikipedia, the NAIC or Healthcare.gov. No facts are sourced from Reddit, forums, vendor blogs, insurer marketing pages or search engines.
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© 2026 Steve Hodgkiss. All rights reserved. Personal use only; no redistribution rights.
Edition 1.0 · stevehodgkiss.net
Contents
Per the Wikipedia article Insurance and the NAIC consumer guide How Does Insurance Work, insurance is a means of protection from financial loss in which, in exchange for a fee, a party agrees to compensate another party in the event of a certain loss, damage, or injury; it is a form of risk management, primarily used to protect against the risk of a contingent or uncertain loss; insurance involves pooling funds from many insured entities to pay for the losses that some may incur, a process known as a risk pool; an entity which provides insurance is known as an insurer or insurance company, a person or entity who buys insurance is known as a policyholder, and a person covered under the policy is called an insured; and per the NAIC guide, insurance starts with a contract called a policy, under which you agree to pay an insurance company a fee called a premium and the company agrees to pay its share of the cost for covered losses or events.
What insurance is
Insurance is a means of protection from financial loss: for a fee, one party agrees to compensate another when a certain loss, damage or injury happens.
It is risk management against a contingent, uncertain loss, and it runs on the risk pool: funds pooled from many insured entities pay for the losses some of them incur.
The whole thing starts with a contract called a policy; you pay a premium, and the company pays its share of covered losses.
Say the trade out loud once this week: a small certain payment against a large uncertain one.
Per the Wikipedia article Copayment and the NAIC consumer guide How Does Insurance Work, a copayment or copay is the patient's share of the cost for goods or services rendered, with the other share paid by the patient's insurance company; it may be defined in an insurance policy and paid by an insured person each time a medical service is accessed, and it must be paid before any policy benefit is payable by an insurance company; the copay is technically a form of coinsurance, but is defined differently in health insurance, where a coinsurance is a percentage payment after the deductible up to a certain limit; per the NAIC guide, the copayment is the fixed amount you pay for services, usually medical services, before your insurance company starts to pay its share; and insurance companies use copayments to share health care costs to prevent moral hazard, since the copay is meant to deter people from seeking care that may not be necessary, though a copay may also discourage people from seeking necessary medical care.
The copay
The copay is a fixed amount paid each time a service is used, before any policy benefit is payable; the other share is the company's.
The family resemblance is real but the split matters: the copay is fixed, coinsurance is a percentage after the deductible.
Copays exist to prevent moral hazard, deterring unneeded visits; the same coin can discourage needed care, so the dial is set with care.
Note the fixed fee the next time you pay one this week, and name what it buys first.
Per the NAIC consumer guide How Does Insurance Work and the Wikipedia article Insurance, a claim is a request asking your insurer to pay its share of the bill for a covered event or service; for auto, homeowners and renters insurance you submit a claim yourself: document what happened with photos, videos, reports and receipts, report the event to your insurer, complete a claim form and send it with your proof, and the insurer reviews the claim and pays its share if the policy covers the event; for health insurance, your medical provider usually submits the claim for you, and the insurance company pays the provider directly; and per the Wikipedia article Insurance, if the insured experiences a loss which is potentially covered by the insurance policy, the insured submits a claim to the insurer for processing by a claims adjuster.
The claim
A claim is a request for the insurer to pay its share of the bill for a covered event.
For auto, home and renters cover you submit it yourself: document with photos and receipts, report the event, send the form and proof; the insurer reviews and pays its share if the policy covers it.
For health cover your provider usually submits the claim and is paid directly.
Photograph one thing you would hate to lose this week; claims run on proof.
Per the NAIC consumer guide How Does Insurance Work and the Wikipedia article Underwriting, underwriting is the insurance company looking at the risk of insuring you and deciding whether to give you a policy, how much to charge, and how much coverage you get; insurance underwriters evaluate the risk and exposures of potential clients, deciding how much coverage the client should receive, how much they should pay for it, and whether to accept the risk; the term underwriting derives from the Lloyd's of London insurance market, where financial backers who accepted some of the risk on a given venture in exchange for a premium would literally write their names under the risk information written on a Lloyd's slip; in underwriting automobile coverage, an individual's driving record is critical; as part of the underwriting process for life or health insurance, medical underwriting may be used to examine the applicant's health status; and underwriters may choose to decline a risk, provide a quotation with adjusted premiums, or apply policy exclusions.
Underwriting
Underwriting is the gate: the company looks at the risk of insuring you and decides whether to cover you, what to charge, and how much.
The name is literal: at Lloyd's of London, backers wrote their names under the risk on a slip.
The verdict has three doors, decline, adjust the premium, or apply exclusions; auto leans on your driving record, life and health on medical underwriting.
Imagine your own file this week: which facts would an underwriter reach for first?
Per the Wikipedia article Term life insurance, term life insurance is life insurance that provides coverage at a fixed rate of payments for a limited period of time, the relevant term; after that period expires, coverage at the previous rate of premiums is no longer guaranteed, and the client must either forgo coverage or potentially obtain further coverage with different payments or conditions; if the life insured dies during the term, the death benefit will be paid to the beneficiary; term insurance is typically the least expensive way to purchase a substantial death benefit on a coverage amount per premium dollar basis over a specific period of time; its primary use is pure income replacement, covering financial responsibilities such as consumer debt, dependent care, university education for dependents, funeral costs, and mortgages; and in annual renewable term, the policy is guaranteed to be able to be continued each year for a given period that varies from 10 to 30 years, or occasionally until age 95.
Term life
Term life is coverage at a fixed rate for a limited term; once it expires, that rate is no longer guaranteed.
Die inside the term and the death benefit goes to the beneficiary; term is the least expensive way to buy a substantial death benefit per premium dollar.
It is built for income replacement: debts, dependents, university, funerals, the mortgage; the annual renewable form runs 10 to 30 years.
Name the years your responsibilities peak this week; that is the shape of a term.
Per the Wikipedia article Vehicle insurance, the Wikipedia article Home insurance and the NAIC consumer guide How Does Insurance Work, vehicle insurance provides financial protection against physical damage or bodily injury resulting from traffic collisions and against liability that could also arise from incidents in a vehicle; a compulsory car insurance scheme was introduced in the United Kingdom with the Road Traffic Act 1930, which ensured that all vehicle owners and drivers had to be insured for their liability for injury or death to third parties while their vehicle was being used on a public road; per the Wikipedia article Home insurance, a homeowners policy is a multiple-line insurance policy, including both property insurance and liability coverage with an indivisible premium, covering liability for injuries and property damage caused by the owner or members of the family to other people; and per the NAIC guide, liability is among the most common types of insurance, alongside auto, health, homeowners and life.
Liability
Liability cover answers for losses you cause to others: injury or damage from a crash, or an accident at your home.
The idea made history in the Road Traffic Act 1930, which made third-party injury cover compulsory for British road users.
A home policy is a multiple-line policy, property cover and liability under one indivisible premium; the NAIC lists liability among the common types.
Trace one what-if this week: if the loss were your fault, whose policy would answer?