Most of us make decisions without knowing exactly what will happen next. Will we stay healthy? How long will we live? Could a flood damage our home? Will a company have enough money to pay its future obligations?
An actuary helps organisations answer questions like these. Using mathematics, statistics, financial theory, and business knowledge, actuaries measure uncertainty and help people make better decisions about risk.
What is an actuary?
An actuary is a professional who studies the financial consequences of uncertain future events. They use historical data and mathematical models to estimate how likely an event is, when it might happen, and how much it could cost.
For example, an actuary working for a life insurance company may study mortality rates to estimate how long different groups of people are likely to live. Those estimates help the insurer set fair premiums and keep enough money in reserve to pay future claims.
Actuaries do not predict the future with certainty. Instead, they develop a range of possible outcomes, explain the risks surrounding them, and recommend actions that are financially sustainable.
What does an actuary do?
The exact work varies by industry, but most actuarial roles involve a combination of the following tasks.
Analysing data
Actuaries examine data such as insurance claims, accident rates, medical costs, investment returns, and customer behaviour. They look for patterns that can help explain past results and provide insight into future outcomes.
Building financial models
An actuarial model represents how uncertain events may affect an organisation over time. An actuary might use a model to estimate future insurance claims, pension payments, or the amount of capital a company needs to remain financially secure.
Because every model relies on assumptions, actuaries regularly test how the results would change if those assumptions were different.
Pricing products
In insurance, actuaries help decide how much customers should pay for policies. A premium must be affordable and competitive, but it must also be sufficient to cover expected claims, operating expenses, and the cost of unexpected losses.
Setting reserves
Insurance claims and pension benefits may be paid many years after an agreement begins. Actuaries estimate how much money should be set aside today so that those commitments can be met in the future.
Managing risk
Actuaries consider what could go wrong and how serious the consequences might be. They may run stress tests involving scenarios such as a recession, a natural disaster, higher medical costs, or a sudden fall in investment markets. Their analysis helps leaders prepare for difficult conditions before they occur.
Communicating results
Technical analysis is only useful when decision-makers can understand it. Actuaries therefore spend a significant part of their time explaining findings to managers, regulators, clients, and other professionals. They must communicate complex ideas clearly and describe both the result and its limitations.
Where do actuaries work?
Actuaries are most closely associated with insurance, but their skills are valuable in many fields, including:
- Life and health insurance, where they price policies and estimate future claims
- General insurance, covering areas such as motor, property, travel, and liability risk
- Pensions and employee benefits, where they assess the long-term cost of retirement promises
- Investment and asset management, where they study financial risks and long-term returns
- Banking, particularly in credit risk, capital management, and financial modelling
- Consulting, where they advise different organisations on insurance, pensions, and risk
- Government and regulation, where they support public policy and monitor financial institutions
- Enterprise risk management, where they examine risks across an entire organisation
Actuarial techniques are also being applied to newer areas such as climate risk, data science, cybersecurity, and advanced analytics.
What skills does an actuary need?
Strong numerical ability is important, but actuarial work requires more than mathematics. A successful actuary usually develops:
- Statistical and analytical skills to interpret data and evaluate uncertainty
- Financial knowledge to understand how money and obligations change over time
- Programming and spreadsheet skills to analyse information and build models efficiently
- Business judgement to connect technical results with practical decisions
- Communication skills to explain conclusions to both technical and non-technical audiences
- Professional judgement and ethics because actuarial advice can affect customers, employees, and the financial stability of organisations
Actuaries also need curiosity. A good model begins with good questions: Is the data reliable? Are the assumptions reasonable? What has changed? What important risk might be missing?
How do you become an actuary?
The route varies by country, but it usually combines university-level study, professional examinations, and relevant work experience. Many actuaries begin with a degree in actuarial science, mathematics, statistics, economics, finance, computer science, or another quantitative subject.
Professional actuarial examinations are known for being challenging and may take several years to complete while working. This demanding process ensures that qualified actuaries have both technical knowledge and an understanding of professional responsibility.
Why does actuarial work matter?
Actuaries help organisations make promises responsibly. Their work supports insurance companies that pay claims after accidents, pension plans that provide retirement income, and financial institutions that must remain stable during uncertain times.
At its heart, actuarial work is about making uncertainty manageable. An actuary combines data, mathematics, and human judgement to help society prepare for events that cannot be predicted perfectly—but should not be ignored.