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How Actuarial Science Determines Life Insurance Premiums and Policy Values

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Updated Oct 26, 2026
Read Time 6 min

Life insurance premiums and policy values are based on statistical analysis, financial mathematics, and expectations. The work of actuaries makes it possible to define the risk of death for a particular group and to assess the number of beneficiaries, to determine the required reserves and the amount of money for the needs of the owner of the insurance policy – its value and premium. It is important to understand how the calculations are made and how different variables affect the rate and the total amount of benefits so that people can choose insurance wisely and protect their families.

Mortality Rates and Premium Calculations

Insurance actuaries study the main indicators characterizing the population’s mortality and compile statistics that make it possible to determine the likelihood that this or that group of people will die in a given period. Mortality rates and life expectancy at different ages are some of the most critical numbers that need to be known for an insurance company to provide coverage for people. Actuaries use a large amount of statistical data, including demography, population structure, and medical information, to identify trends and find a correlation between causes and consequences.

A significant factor affecting the probability of death is age: the older a person is, the more probable it is that they will die in the near future. Thus, the calculation of the base rate reflects this data: if two people are different in age and apply for the same policy, the older one will have to pay more. In addition, individuals who smoke, have unhealthy habits or suffer from a disease may increase their risk of dying with additional actuaries that take this information into account.

Financial Assumptions and Future Obligations

The main obligation of any insurance company is to pay off the policy beneficiary upon the insured person’s death. The amount of this obligation is subject to change depending on who the beneficiary is, but other expenses must be added to it, and both should be covered by the pool of premium payments. Actuaries should estimate obligations with regard to future payments: the money obtained today is not equal to the amount that will be in several years.

Another essential assumption is the investment income, the size of which depends on the insurer’s ability to invest policy proceeds in various financial instruments. Actuaries need to make an estimate that takes into account the risk of this issue: if an insurance company expects a lower return on investment than the estimated value, this will negatively affect the future.

Underwriting and Individual Risk Assessment

Since insurance actuaries deal with averages and groups, insurance companies still must risk assess each applicant to decide how much it will bring them. To do this, they can examine an individual’s medical history, fill out questionnaires about their habits and current health, and look at their prescriptions. The results of the underwriting process allow the company to understand whether the requested rate is appropriate or if the applicant needs to be provided with adjustments.

Actuaries should also consider how these deviations will affect the entire pool of policyholders at once. If people with lower mortality rates were accepted without changes, additional expenses would nevertheless occur. Therefore, actuaries also calculate how underwriting affects the rate. For example, there is a standard premium for a given age, occupation, and health; at the same time, having conducted the underwriting, one can conclude that this person’s premium should be lower because, in the meantime, the company will not be obliged to pay out.

Policy Values and Cash Accumulation

Life insurance Canada comes in several varieties that differ in the system of valuations. Thus, term life insurance is intended mainly to cover the years during which a person will need it, gradually terminating as they approach retirement. Term life insurance does not accumulate any cash value, and the premium is established mainly based on the probability that an insured person will die at a particular age.

Permanent life insurance is designed so that the premium is also paid for several decades, but in addition to death benefits, it provides cash benefits for the owner. Actuaries should consider how much cash value has been generated over the years by the size of the premium, insurance costs, expenses, and income from investing. Valuation is more important for permanent, rather than term, policies because they depend on the contractual conditions and the method of crediting: interest on it can be based on a declared rate, guaranteed, or a separately specified system that may involve accrual only on specific dates and the distribution of profits.

Reserves and Long-Term Financial Stability

To ensure that there will be enough money to pay claims, insurance companies set aside reserves, which actuaries must calculate using the assumptions about future values discussed above for a particular book. Another essential factor for determining reserves is expenses: commissions, administrative costs, and other payments that the insurer will provide when people buy their policies, that must be included in the calculations. In addition, reserves and estimates of future needs also include mortality, investment income and expenses, and any expenses associated with policy surrenders.

Actuaries also study reserve laws, which insurance companies must follow: they are subject to analysis, and it is necessary to choose estimates that will withstand the strongest pressures and stress tests that take into account the worst possible scenarios. Therefore, when determining reserves, actuaries calculate what the company’s needs for future payouts will be, considering the many factors mentioned.

Experience Analysis and Pricing Adjustments

Actuaries carry out calculations even after the policy is completed since the work of insurance companies is to accumulate as many policyholders as possible, covering as much as possible of their lives and investing in long-term projects so that they can pay off all the beneficiaries. During the period of a person’s coverage, actuaries keep track of deaths and expenses: if people, whose lives expected to end by a certain age, turned out to be alive, this can significantly affect the assumptions. A large number of deaths in a given group means that the company will have to pay more in benefits than expected.

Thanks to such analysis, it becomes possible to refine the actuarial estimates for future events, but this does not affect the rates installed in the current policies. Nevertheless, experience analysis is also applied to existing ones so that the insurer understands the strengths and weaknesses of the chosen system and how to attract more customers within the capabilities of budgets and forecasts while ensuring stable income from premium payments and investing.

Conclusion

Actuaries perform calculations whose basis is statistical data and information about the work of insurance companies. This work covers a wide range of activities: from analyzing mortality rates to studying the peculiarities of legal relationships in countries with different systems. People may want to understand what factors affect insurance products, how insurance companies assess the risks that people insure, and why the premium amounts differ for different people purchasing policies. Information about actuarial science also allows a consumer to determine the value of a policy, that is, the total amount of insurance and reserves held by the company to cover future claims, and analyze the guarantees and benefits that a policy may provide throughout the contract period.