Average Accounting Rate of Return is a technique that measures the profitability of a project using the accounting profits of the company. ARR is the average net income expected by a project divided by the average capital cost. ARR is also known as the Average Rate of return or Simple Rate of Return.
$$ARR=\frac { Average\quad Net\quad Profit }{ Average\quad Investment } $$
Where,
$$Average\quad Net\quad Profit=\frac { Total\quad Profit\quad in\quad investment }{ No.\quad of\quad Years } $$
$$ARR=\frac { Average\quad Net\quad Profit }{ Average\quad Investment } $$
Where,
$$Average\quad Net\quad Profit=\frac { Total\quad Profit\quad in\quad investment }{ No.\quad of\quad Years } $$
Average Investment = 
- ARR is a tool used in Capital budgeting to evaluate the returns of various investments by using accounting profits instead of cash flows.
- ARR ignores the Time Value of Money.
- A Project is assumed to be profitable if ARR >= Expected Rate of Return.
| Year | 1 | 2 | 3 | 4 |
| Net Profit | 110000.00 | 125000.00 | 135000.00 | 150000.00 |
Average Net Profit = (110000 + 125000 + 135000 + 150000) / 4 = 520000 / 4 = 130000.00
Average Investment = (500000 – 0) / 2 = 250000
ARR = Average Net Profit / Average Investment = 130000 / 250000 = 0.52
Hence, ARR = 0.52 or 52%
