Section 93 in The Companies (Accounting Standards) Rules, 2006
93. Actuarial gains and losses may result from increases or decreases in either the present value of a defined benefit obligation or the fair value of any related plan assets. Causes of actuarial gains and losses include, for example:
(a)unexpectedly high or low rates of employee turnover, early retirement or mortality or of increases in salaries, benefits (if the terms of a plan provide for inflationary benefit increases) or medical costs;(b)the effect of changes in estimates of future employee turnover, early retirement or mortality or of increases in salaries, benefits (if the terms of a plan provide for inflationary benefit increases) or medical costs;(c)the effect of changes in the discount rate; and(d)differences between the actual return on plan assets and the expected return on plan assets (see paragraphs 107-109).Past Service Cost
