Defined Benefit Plan - Actuarial Loss Deferred in OCI (Assumption Change or Experience)
Recording an actuarial loss arising from a discount rate decrease (PBO increase above expectation) or adverse demographic experience, deferred in Other Comprehensive Income rather than immediately recognized in earnings.
| Account Name | Type | Debit ($) | Credit ($) |
|---|---|---|---|
| Other Comprehensive Loss - Net Actuarial Loss (Pension) | OCI (-) | 85,000,000.00 | - |
| Projected Benefit Obligation - Actuarial Loss Increase | Liability (+) | - | 85,000,000.00 |
💡 Accountant's Note
Actuarial gains/losses arise from: (1) Assumption changes — discount rate movements (the largest source), mortality table updates, compensation growth revisions, and (2) Experience differences — actual retirements, terminations, and deaths differing from expectations, plus plan asset actual vs. expected returns. Under ASC 715, these are deferred in OCI — NOT immediately in P&L. They accumulate in AOCI until amortized into expense through the corridor method or faster amortization policy. When rates fell dramatically (2015-2021), billions in actuarial losses piled up in AOCI on corporate balance sheets. When rates rose sharply (2022), those losses reversed as large actuarial GAINS.
Practitioner & Systems Framework
💻 ERP Architecture
Track actuarial gains/losses by source (assumption changes vs. experience) and by year (vintage) — required for corridor amortization (each vintage amortizes separately). Some companies elect immediate MTM recognition — eliminating OCI balance but creating extreme income volatility. The deferred tax effect on AOCI (at the enacted rate) must be calculated and presented in the AOCI rollforward.
⚠️ Audit Flags
Auditors verify actuarial gains/losses reconcile from the valuation's PBO and asset rollforward. The AOCI balance rollforward (beginning + current period OCI gains/losses - amortization = ending) must tie to the balance sheet equity section. Auditors test the deferred tax impact on AOCI using the correct statutory rate for each jurisdiction where participants work.
📄 Required Documentation
Actuarial valuation gain/loss bridge (beginning PBO + service cost + interest cost ± actuarial gain/loss − benefits paid = ending PBO), asset return vs. expected return analysis, AOCI rollforward by vintage year (gross and net of tax), deferred tax calculation on OCI amounts.
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