Actuary
Actuary
Quick Definition
An actuary is a trained professional who uses mathematics, statistics, probability theory, and financial modeling to measure and manage the financial impact of risk and uncertainty. In insurance, actuaries calculate the premiums needed to cover expected claims and maintain solvency. In pensions and retirement, they project future benefit obligations and funding requirements. Actuaries are among the most analytically rigorous professionals in finance.
What It Means
Insurance companies and pension funds make promises to pay benefits far into the future — promises that depend on uncertain events: when people die, how often they get sick, how many cars crash, how often houses burn. Actuaries are the professionals who quantify these uncertainties with mathematical precision and determine what those promises will cost.
Without actuaries, insurance pricing would be guesswork. An insurer that charges too little accumulates claims it cannot pay; one that charges too much loses business to competitors. Actuarial science enables the precise risk pricing that makes insurance markets function.
Key Actuarial Functions
| Function | Description |
|---|---|
| Premium pricing | Calculate the premium needed to cover expected claims, expenses, and profit margin |
| Reserving | Estimate how much must be set aside to pay future claims already incurred |
| Product design | Determine policy features, exclusions, and benefits that are actuarially sound |
| Solvency testing | Stress test insurer's balance sheet against adverse scenarios |
| Reinsurance pricing | Price the risk transferred to reinsurers |
| Pension valuation | Project and discount future pension obligations to determine funding requirements |
| Rate regulation filings | File proposed rates with state insurance departments and justify them actuarially |
The Mortality Table: The Actuary's Foundation
The mortality table (life table) is the foundational tool of actuarial science — showing the probability of dying at each age:
| Age | Deaths per 1,000 (US, 2022) | Life Expectancy Remaining |
|---|---|---|
| 25 | 1.2 | 54.5 years |
| 35 | 1.8 | 45.0 years |
| 45 | 3.5 | 35.5 years |
| 55 | 7.5 | 26.5 years |
| 65 | 16.2 | 18.5 years |
| 75 | 40.8 | 12.0 years |
| 85 | 110.0 | 7.0 years |
Life insurance premiums are directly derived from these probabilities. A 35-year-old has a 0.18% chance of dying in a given year; a 65-year-old has a 1.62% chance — explaining why life insurance costs 9x more per dollar of coverage at 65 vs. 35.
Actuarial Credentials and Education
| Credential | Organization | Description |
|---|---|---|
| Fellow of the Casualty Actuarial Society (FCAS) | CAS | Property/casualty insurance focus |
| Fellow of the Society of Actuaries (FSA) | SOA | Life, health, pension focus |
| Associate designations (ACAS, ASA) | Both | Entry-level credentialing |
| Enrolled Actuary (EA) | JBEA | Pension-specific federal credential |
| Chartered Enterprise Risk Actuary (CERA) | SOA | Enterprise risk management |
Exam path: Actuaries pass a series of professional examinations (typically 7-10 exams over 5-10 years) while working in the field. Each passed exam brings a salary increase and credential advancement. Actuaries are among the highest-paid finance professionals.
Actuarial Assumptions: The Art Behind the Math
Actuaries make assumptions about uncertain future events:
| Assumption | What It Affects |
|---|---|
| Mortality rates | Life insurance premiums and reserves; annuity pricing |
| Investment returns | Pension funding calculations; life insurance reserve discounting |
| Lapse rates | Probability policyholders will cancel; affects pricing |
| Morbidity rates | Disability and health insurance pricing |
| Trend rates | Medical cost inflation; auto repair costs |
| Catastrophe loading | Hurricane, earthquake, pandemic tail risks |
Assumption sensitivity: Small changes in assumptions create large impacts. A 0.5% change in the assumed investment return for a pension fund can change the projected funding shortfall by tens of millions of dollars.
Actuaries in Pension and Retirement
For defined benefit pension plans, actuaries:
- Project future benefit payments to all employees based on age, salary, years of service
- Discount those projections to present value using an assumed return rate
- Compare projected obligations to plan assets to determine underfunding/overfunding
- Calculate the annual contribution required to keep the plan on track
Public pension crisis: Many state and local government pension plans have used overly optimistic investment return assumptions (7-8% when realities are lower), systematically understating their unfunded liabilities. Actuaries are central to this debate — the choice of discount rate can change a plan's funding ratio from 80% to 60%.
Key Points to Remember
- Actuaries use mathematics and statistics to quantify risk and price insurance contracts
- Mortality tables — showing death rates by age — are the fundamental tool for life insurance pricing
- Actuaries hold rigorous credentials (FSA, FCAS) earned through multiple years of professional exams
- They work in insurance, pensions, healthcare, government, and enterprise risk
- Actuarial assumptions (investment returns, mortality, lapse rates) have enormous financial consequences — small changes compound into large differences
- The public pension underfunding crisis largely reflects optimistic actuarial assumptions made over decades
Frequently Asked Questions
Q: What is the difference between an actuary and an underwriter? A: Actuaries set the overall rate structure — determining what premiums an entire risk class should charge based on statistical analysis of large populations. Underwriters apply those rate structures to individual applicants — assessing specific people's risk and classifying them into the appropriate rate category. Actuaries work at the portfolio level; underwriters work at the individual policy level.
Q: Why is actuary consistently ranked one of the best jobs in America? A: Multiple factors: high median salary (~$120,000-$180,000), low unemployment, high job satisfaction, intellectually stimulating work, good work-life balance compared to other high-paying professions, and clear career progression through credential exams. Job growth is also strong — the BLS projects faster-than-average employment growth through 2030 driven by insurance industry complexity and healthcare analytics needs.
Q: What is an "actuarial reserve"? A: An actuarial reserve is the amount an insurance company must set aside today to pay future expected claims. It is calculated as the present value of expected future claim payments minus the present value of future expected premiums. State insurance regulations require companies to maintain sufficient reserves to honor all projected future obligations — and actuaries certify that reserve calculations meet regulatory standards.
Related Terms
Underwriting
Underwriting is the process by which an insurer evaluates the risk of a potential policyholder — assessing health, financial history, and other factors — to decide whether to offer coverage and at what premium rate.
Insurance Claim
An insurance claim is a formal request to your insurance company for payment or coverage of a loss or medical expense covered by your policy — triggering the insurer's obligation to investigate and pay according to the policy terms.
Insurance Premium
An insurance premium is the amount you pay — monthly, quarterly, or annually — to maintain an insurance policy, representing the price of transferring financial risk from yourself to the insurer.
Due Diligence
Due diligence is the process of thoroughly investigating and verifying information about a company, investment, or transaction before committing — ensuring that what is represented is accurate and that material risks are understood.
Keogh Plan
A Keogh plan is a tax-deferred retirement account for self-employed individuals and unincorporated businesses, offering high contribution limits similar to corporate pension plans before being largely superseded by SEP IRAs and Solo 401(k)s.
Pension
A pension is an employer-funded defined benefit retirement plan that guarantees employees a fixed monthly income for life after retirement, based on salary and years of service.
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