Concept · C:pension-actuarial-assumption

Pension actuarial assumption

Working definition

A supported demographic or economic input to benefit measurement, such as mortality, retirement, turnover, compensation growth, or healthcare utilization.

On this page
  1. Apply it
  2. Common mistake
  3. Keep the boundary clear
  4. Authority

Pension actuarial assumption requires a named plan, population, date, and evidence owner. An actuarial assumption represents a supported estimate about financial or demographic conditions used in a benefit measurement. Record its purpose, plan, population, date, specialist owner, prior value, change, and supplied effect.

Apply it

Discount rates affect present value; salary growth can affect final-pay benefits; mortality, retirement, turnover, and elections affect timing and amount. One favorable rate cannot stand in for the complete model.

Common mistake

Do not assume that an accountant may fill a missing actuarial assumption from a prior-year file. Assumptions require current, dated support from the responsible specialist and must match the measured plan and population. That error would use stale or mismatched inputs to support a current obligation measurement.

Keep the boundary clear

Accounting challenges consistency and evidence but does not select actuarial assumptions or treat a model input as a management preference.

Authority

Read ASC 715-30-35-42 for the assumptions used to measure pension obligations.

Learning objectives

Put the concept to work

Learning level

Apply this concept

  • Explain and apply pension actuarial assumption within a reconciled employer benefit-plan workpaper using supplied authoritative and actuarial facts.

Learning resources

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Updated Sep 11, 2026 Review due Dec 11, 2026