How it works?

Recognition of Additional Gain or Loss
Additional losses/gains may be required to be recognised to offset the effect of a reduction/increase in the reserve against the prepaid [recognized as income/expense] caused by actuarial losses/gains or the effect of a plan amendment.
Paragraph 58A | |
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The application of par 58 should not result in a gain being recognised solely as a result of an actuarial loss or past service cost in the current period or in a loss being recognised solely as a result of an actuarial gain in the current period. The entity should therefore recognise immediately under par 54 the following to the extent that they arise while the defined benefit asset is determined in accordance with par 58(b) | |
(a) | net actuarial losses … and past service cost … to the extent that they exceed any reduction in the present value of the economic benefits … |
(b) | net actuarial gains … after the deduction of past service … to the extent that they exceed any increase in the present value of the economic benefits … |