Internal:Training/IFRS17/Why insurance exists
🎯 Objective. In this page, you will learn:
- Why uncertainty creates risk, and why risk is a problem that individuals cannot easily solve alone.
- How pooling transforms unpredictable individual losses into a manageable shared cost.
- What role the insurer plays in organising and sustaining the pool, and why that role is necessary.
Uncertainty and risk
🌍 Life is uncertain. Every day, people and businesses face events they cannot predict or control. A factory owner does not know whether a fire will destroy her warehouse next year. A driver does not know whether he will cause an accident tomorrow. A family does not know whether a storm will tear the roof off their home this winter. These events may never happen, but if they do, the financial consequences can be devastating.
💡 Risk is uncertainty with a price tag. In everyday language, we often use "risk" loosely, but in insurance and finance, risk has a more precise meaning: it is the possibility that an actual outcome will differ from what was expected, and that the difference will cost money. Consider a homeowner in a coastal town. She knows that the chance of a severe flood hitting her property in any given year might be small, perhaps 1 in 100. But if that flood arrives, the repair bill could reach €150,000, an amount that would wipe out her savings entirely. The size of the potential loss, combined with the inability to predict when it will strike, is what makes risk so dangerous at the individual level. It is not the average cost that hurts; it is the concentration of the entire cost on one unlucky person at one unlucky moment.
⚠️ Common misconception. Many people believe that risk only matters when something is likely to happen. In reality, even events with a very low probability can represent serious risk if the potential loss is large enough. A 1% chance of losing €150,000 is a far bigger problem for most households than a 50% chance of losing €20.
🔧 Why individuals struggle with risk. A person facing a large, unpredictable loss has limited options. She could try to save enough money to cover the worst case, but that means locking away €150,000 "just in case," which is impractical for most people. She could simply hope for the best and do nothing, but that is a gamble with her financial security. She could try to avoid the risk entirely by, say, never owning a home near the coast, but that means giving up opportunities. None of these solutions is satisfactory. The fundamental problem is that one person alone cannot absorb a catastrophic loss without either sacrificing a great deal in advance or accepting a great deal of vulnerability. There must be a better way.
🤔 Think about it. If a single person cannot handle a large loss alone, what happens when many people facing the same type of risk come together? Could the group succeed where the individual fails?
Pooling as a solution
🤝 Strength in numbers. The breakthrough idea behind insurance is remarkably simple: if one person cannot afford a catastrophic loss, perhaps a large group of people can share it. Imagine 5,000 homeowners in that same coastal town, each facing the same 1-in-100 annual chance of a severe flood costing €150,000. On average, about 50 of them will be hit in any given year, producing total losses of around €7,500,000. If every homeowner contributes €1,500 into a common fund at the start of the year, the fund collects €7,500,000, exactly enough to cover the expected losses. Each homeowner replaces an unpredictable, potentially ruinous €150,000 loss with a predictable, manageable €1,500 payment.
📊 The law of large numbers at work. This is not just optimism; it rests on a mathematical foundation called the law of large numbers. When you observe a small number of events, the outcomes can swing wildly. Flip a coin ten times and you might see eight heads. But flip it ten thousand times and the proportion of heads will settle very close to 50%. Similarly, for a single homeowner, "will I flood or not?" is a binary gamble. But across 5,000 homeowners, the total number of floods in a year becomes far more predictable. The pool does not eliminate risk entirely, but it transforms individual uncertainty into collective near-certainty. The larger the pool, the more stable and predictable the total losses become relative to expectations.
⚠️ Common misconception. A common misunderstanding is that pooling eliminates risk altogether. It does not. The pool still faces volatility: in a bad year, 70 homes might flood instead of 50, and the fund would fall short. What pooling achieves is a dramatic reduction in the variability per person. Each member's share of the unexpected shortfall is small and manageable, even if the total surprise is large.
🏗️ From concept to practice. The idea of pooling losses is ancient. Merchants in Babylon and medieval Europe formed mutual agreements to share the cost of ships lost at sea. Chinese traders distributed their goods across many vessels so that no single sinking would ruin any one merchant. These early arrangements show that the principle of risk pooling is intuitive: people have always understood, at some level, that spreading losses across a group is better than bearing them alone. But these informal arrangements also reveal a problem. They work only as long as every member acts honestly, contributes fairly, and stays in the group. As soon as the pool grows beyond a small circle of trust, new challenges arise.
🤔 Think about it. If pooling works so well among neighbours who trust each other, why can't a large group simply pass a hat around? What happens when the group grows to hundreds or thousands of strangers? What is missing?
The role of the insurer
🏢 Enter the insurer. When a pool grows beyond a handful of people who know each other, someone needs to step in and manage it. That someone is the insurer. The insurer is an organisation that takes on the job of collecting contributions (called premiums), estimating how much the pool will need to pay out in claims, investing the collected funds until they are needed, and paying those claims when losses occur. Without a central organiser, a large pool would quickly fall apart: no one would know how much to contribute, no one would verify whether claims are genuine, and no one would ensure the money is there when it is needed.
📋 What the insurer actually does. The insurer performs several critical functions that make the pool viable at scale. First, it assesses risk: using data, statistical models, and professional judgment, the insurer estimates the probability and severity of losses for different types of policyholders. This process, known as underwriting, determines how much each member should pay. Second, the insurer manages the pool's money, ensuring that collected premiums are available to pay claims as they arise; sometimes holding funds for years before a claim is settled. Third, the insurer handles claims management, investigating whether reported losses are genuine and determining the correct amount to pay. These functions require expertise, infrastructure, and capital that an informal group of neighbours simply does not have.
⚠️ Common misconception. People often think of the insurer as a mere bet-taker, profiting when bad things fail to happen. In reality, the insurer's primary role is as a risk manager and pool administrator. It earns its place by performing skilled work: measuring risk, setting fair prices, managing funds prudently, and honouring claims efficiently. The ability to do these things well is what separates a functioning insurance market from a hopeful but fragile informal arrangement.
🔒 The promise at the heart of insurance. When a person buys an insurance contract, she enters into a formal agreement: she pays a premium, and in return, the insurer promises to compensate her if a covered loss occurs. This promise is a liability on the insurer's books, an obligation that may stretch months or even decades into the future. The insurer must be confident, and must demonstrate to regulators and the public, that it can keep this promise. This is why insurers are required to hold reserves (funds set aside to cover future claims) and capital (an additional buffer for unexpected losses). The entire structure exists to make the original insight of pooling work reliably, at scale, across time.
🌐 Why this matters for accounting. Because the insurer's core activity is making and keeping long-term promises under uncertainty, measuring those promises accurately is both critically important and exceptionally difficult. How much should the insurer set aside today for claims that might not be paid for years? How should it recognise the profit it expects to earn over the life of a contract? These are the questions that insurance accounting must answer, and they are the questions that will occupy us for the rest of this training. For now, the key point is this: insurance exists because individuals cannot bear catastrophic risk alone, pooling provides the solution, and the insurer is the institution that makes pooling work at scale.
Takeaways and quiz
📌 Key takeaways.
- Risk is the possibility of an unpredictable loss, and it is dangerous to individuals because the full cost of a rare event can be financially devastating.
- Pooling transforms large, unpredictable individual losses into small, predictable shared contributions, powered by the law of large numbers.
- The insurer makes pooling work at scale by underwriting risk, collecting premiums, managing funds, and paying claims, all backed by reserves and capital.
👉 Next up. Now that you understand why insurance exists and what the insurer does, the next step is to look inside an insurance contract and understand its economics: where the money comes from, where it goes, and how the insurer expects to earn a profit. Continue to The economics of an insurance contract.