All past service costs are expensed. The rationale for doing this is that

Question

Quizplus · Accepted Answer

Past service costs relate to services that have already been provided, thus recognizing them in future periods would not provide useful information to financial statement users. Additionally, there is no justification for deferring their recognition since they do not relate to non-vested services. Therefore, past service costs should be expensed in the current period.

All Past Service Costs Are Expensed