the estimated period of time required for the estimated future net cash receipts from an investment in a project or capital asset to return the original cost of the investment
Notifications shall cover: ... profitability calculations in respect of the amounts invested, giving the main factors and the result of the calculations, e.g. internal rate of return or pay-back period, except where this calculation was not involved in the decision-making process of the undertaking, in which case it shall state the reasons why account was not taken of this factor ...