An actuarial report is a signed, standards-governed document that puts a dollar figure on financial obligations that haven’t come due yet. It uses mathematical models to estimate what a pension plan owes its retirees, how much an insurance company needs in reserves, or what a personal injury claim is worth in today’s dollars. Companies, government agencies, insurers, and attorneys commission these reports to meet legal requirements and make sound funding decisions. The discount rate chosen for the calculations is often the single most consequential input, because even a small change can shift the reported liability by billions of dollars for a large plan.
What an Actuarial Report Is Used For
Defined Benefit Pension Plans
Pension funding is the most heavily regulated use. An employer sponsoring a defined benefit plan must contribute enough money each year to satisfy minimum funding standards under ERISA.1Office of the Law Revision Counsel. 29 USC 1082 – Minimum Funding Standards The report calculates the gap between the plan’s assets and its projected obligations, then determines the contribution the employer needs to make.
Federal law spells out exactly what the annual actuarial statement must cover: the valuation date, contributions received, normal costs and accrued liabilities, actuarial assumptions used, the number of participants and beneficiaries, the current value of plan assets, and a certification of the contribution needed to eliminate any funding shortfall.2Office of the Law Revision Counsel. 29 USC 1023 – Annual Reports The report must also justify any changes in assumptions or methods from the prior year, so regulators have an independent check that the plan can actually pay the benefits it has promised.
Insurance Reserves and Pricing
Insurance companies rely on actuarial reports to set premium rates and determine how much money they need to hold in reserve for future claims. The actuary projects claims frequency, severity, and timing, then calculates the reserves the carrier must maintain. Every insurer filing an annual financial statement must attach a Statement of Actuarial Opinion certifying that reserves are adequate. The National Association of Insurance Commissioners mandates this through its Actuarial Opinion and Memorandum Regulation, which calls for a reserve adequacy opinion each year along with a supporting memorandum.3National Association of Insurance Commissioners. Actuarial Opinion and Memorandum Regulation – Model 822
Self-Funded Health Plans
Employers that self-fund their health benefits face a different kind of uncertainty: how much to budget for next year’s medical claims. Actuarial reports for these plans analyze historical claims experience, enrollment trends, and cost inflation to project future spending. That projection helps the employer set annual funding targets and decide how much stop-loss insurance to purchase.
Public Sector Pensions and Retiree Benefits
State and local governments follow separate accounting standards. Under GASB Statement No. 67, public pension plans must obtain actuarial valuations at least every two years, though annual valuations are encouraged. If a valuation isn’t performed as of the plan’s fiscal year-end, the actuary rolls forward amounts from an earlier valuation performed no more than 24 months prior. The discount rate rules differ from the private sector: projected benefit payments are discounted using a blended rate that combines the expected return on plan investments with a municipal bond rate, depending on whether the plan’s assets are projected to be sufficient to cover benefits.4GASB. Summary – Statement No. 67
Litigation and Economic Damages
Attorneys in personal injury and wrongful death cases hire actuaries to calculate economic damages. The actuary estimates the present value of future lost wages, medical expenses, and other costs the injured party would have earned or incurred. Structured settlement valuations also depend on actuarial present value calculations, translating a stream of future payments into a lump-sum equivalent.
What’s Inside the Report
The Actuarial Standards Board governs what goes into every actuarial report through ASOP No. 41, the standard on actuarial communications. The core requirement is transparency: the report must contain enough detail that another qualified actuary could review the work and form an independent judgment about whether the methods, assumptions, and conclusions are reasonable.5Actuarial Standards Board. Actuarial Communications – ASOP No. 41
ASOP No. 41 requires specific disclosures in every report:
- Who the intended users are and who can rely on the conclusions.
- The scope and purpose, meaning the specific questions the actuary was asked to answer and the valuation date covered.
- Warnings about the inherent risk and uncertainty in the projections.
- Limitations on how the findings should be applied, including a statement that the report should not be relied on for purposes beyond its intended scope.
- Identification of any data the actuary used but did not independently verify, with a note that the actuary does not take responsibility for that data’s accuracy.
- The methodology, often distinguishing between single-point estimates and probability-based simulations that model a range of outcomes.
- Any potential conflict of interest that could affect the actuary’s objectivity.
- A qualification acknowledgment confirming the actuary meets the professional standards to perform the work.
These disclosures exist so that anyone reading the report can evaluate its reliability without needing to take the actuary’s conclusions on faith.
The report typically closes with a formal actuarial opinion or certification, a signed statement affirming that the work was prepared in accordance with applicable standards and that the assumptions are reasonable. For pension plans, federal law requires the enrolled actuary to certify that the report is complete and accurate and that the assumptions comply with statutory requirements.2Office of the Law Revision Counsel. 29 USC 1023 – Annual Reports For insurance filings, the appointed actuary signs an opinion on reserve adequacy that is attached to the carrier’s annual statement.3National Association of Insurance Commissioners. Actuarial Opinion and Memorandum Regulation – Model 822
The Data and Assumptions That Drive the Numbers
Every actuarial report rests on two foundations: the raw data fed into the model and the assumptions the actuary selects. The conclusions are only as reliable as those inputs.
Input Data
For a pension plan, the data typically includes a census of every participant: ages, salaries, hire dates, benefit formulas, and years of service. For an insurance portfolio, it’s historical claims experience, policy terms, and premium volume. Incomplete or inaccurate data can throw off the entire model, which is why ASOP No. 41 requires the actuary to identify any data relied upon that the actuary did not independently verify.5Actuarial Standards Board. Actuarial Communications – ASOP No. 41
Economic Assumptions
The discount rate is the most consequential assumption in most actuarial reports. It represents the rate used to convert future payment obligations into a present-day dollar amount. A lower discount rate produces a larger liability because it assumes the plan’s investments will grow more slowly. For a large pension fund, even a one-percentage-point reduction can increase reported obligations by hundreds of millions or billions of dollars. The IRS publishes monthly segment rates that pension plans must use for minimum funding calculations, with first-segment rates for 2026 plan years running roughly 4.50% to 4.81%.6Internal Revenue Service. Pension Plan Funding Segment Rates
ASOP No. 27 governs how actuaries select economic assumptions for pension work. Each assumption must be reasonable, meaning it reflects the actuary’s professional judgment, draws on current and historical data, estimates future experience or observations from market data, and carries no significant bias in either direction.7Actuarial Standards Board. Selection of Economic Assumptions for Measuring Pension Obligations – ASOP No. 27 The actuary must also check that all economic assumptions are internally consistent. Beyond the discount rate, the report typically includes assumptions about long-term inflation and projected salary increases, both of which determine how large future benefit payments will be before they are discounted back.
Demographic Assumptions
Demographic assumptions address the human variables: how long people live, when they retire, how often employees quit, and how frequently disabilities occur. A life insurer’s choice of mortality table directly controls the projected timing of death benefit payments. A pension plan’s assumption about average retirement age determines when benefit payments start flowing and for how long.
These assumptions typically rely on published tables, like the Society of Actuaries’ mortality tables, adjusted for the specific population being modeled. A workforce skewed toward physically demanding jobs might justify different mortality or disability assumptions than a white-collar office population. Because the results are sensitive to these inputs, the report must disclose every assumption and explain why it was chosen.
Who Can Sign an Actuarial Report
The credentials required depend on the type of work. For pension plans subject to ERISA, the actuarial statement must be signed by an Enrolled Actuary, a federal designation governed by the Joint Board for the Enrollment of Actuaries under the Treasury Department and the Department of Labor. Federal regulations define the education and experience standards for enrollment.8eCFR. 20 CFR Part 901 – Regulations Governing the Performance of Actuarial Services Under ERISA
For property and casualty insurance, the NAIC accepts specific designations for the appointed actuary who signs the reserve adequacy opinion: Fellow of the Casualty Actuarial Society, Associate of the Casualty Actuarial Society with additional exam requirements, or Fellow of the Society of Actuaries with additional general insurance coursework.9National Association of Insurance Commissioners. Definition of Accepted Actuarial Designation – 2026 Draft Holding the credential alone is not enough. The actuary must also meet continuing education and experience requirements specific to the practice area.
In other contexts, the Society of Actuaries offers two primary designations: Associate (ASA) and Fellow (FSA). The ASA requires passing a series of exams covering probability, financial mathematics, predictive analytics, and actuarial practice. The FSA adds a specialty track on top of that foundation. Not every designation qualifies the holder to sign every type of report, and mismatches between credentials and signing authority are where compliance mistakes happen.
The Standards Behind the Work
Every actuarial report prepared in the United States must comply with the Actuarial Standards of Practice issued by the Actuarial Standards Board. These standards are binding: failure to follow an applicable ASOP can breach the Code of Professional Conduct and expose the actuary to disciplinary proceedings.10Actuarial Standards Board. Introduction to the Actuarial Standards of Practice
The ASOPs are principles-based. They don’t dictate a single calculation method or mandate a particular outcome. Instead, they identify the factors the actuary should consider and the documentation the actuary must produce. Three come up repeatedly: ASOP No. 41 on communications and disclosures, ASOP No. 27 on economic assumptions for pension measurements, and ASOP No. 35 on demographic assumptions like mortality and turnover rates.
Filing and Consequences
Defined benefit pension plans file an annual Form 5500 with the Department of Labor, the IRS, and the Pension Benefit Guaranty Corporation.11U.S. Department of Labor. Form 5500 Series Single-employer defined benefit plans attach Schedule SB, which reports the plan’s assets, liabilities, funding target, normal cost, and other actuarial data.12U.S. Department of Labor. Single-Employer Defined Benefit Plan Actuarial Information State insurance departments review actuarial opinions as part of financial oversight, and the NAIC’s supporting memorandum requirement, including an asset adequacy analysis and regulatory issues summary, is due no later than March 15 of the following year.3National Association of Insurance Commissioners. Actuarial Opinion and Memorandum Regulation – Model 822
An actuary who fails to meet professional standards faces more than reputational damage. The Actuarial Board for Counseling and Discipline can investigate complaints and recommend disciplinary action to any professional organization the actuary belongs to, including public reprimand, suspension, or expulsion.13American Academy of Actuaries. ABCD Responsibilities For enrolled actuaries, the Joint Board can suspend or terminate enrollment, effectively barring the actuary from pension work. A plan sponsor or insurer that files a deficient report can face regulatory penalties, funding corrections, and increased scrutiny on future filings.
How to Read One
If you’re a trustee, CFO, or board member reviewing an actuarial report for the first time, start with the executive summary. It states the bottom-line conclusions: the plan’s funded status, the required contribution, or the reserve adequacy determination. That section tells you what the actuary concluded. The rest of the report tells you why.
The assumptions section deserves the closest scrutiny. Look at the discount rate first, because it has the largest impact on the final numbers. Compare it to the prior year’s rate and ask the actuary to explain any change. Then check whether the mortality and retirement age assumptions have been updated to reflect current data. Outdated assumptions can make a plan look healthier than it actually is.
Pay attention to the sensitivity analysis if one is included. This section shows how the results change when key assumptions are adjusted up or down. If a half-point shift in the discount rate swings the liability by tens of millions of dollars, the reported number sits on a narrow ledge. The report’s conclusions are an estimate built on professional judgment, not a guaranteed prediction, and the sensitivity analysis is where that uncertainty becomes visible.