Demerits of Pay Back Method:-
(i) It ignores the Cash Flows after the Pay Back Period: - The main shortcoming of this method is that it completely ignores all cash inflows subsequent to the payback period.
(ii) It ignores the Time Value of Money: - Another deficit of the payback method is that it ignores the time value of money. This method delight a rupee received in the second or third year as valuable as a rupee received in the first year.
(iii)It doesn't give the Accept-Reject Decision in case of single project: - If presume the payback period is 4 years the method doesn't provide an answer as to whether the project will be accepted or rejected.
(iv) It ignores cost of Capital: - Cost of capital isn't taken into consideration under this method.
(v) It disregards the Profitability of a Project.