A huge number of variations of ROT are determined in practice, based upon how "Investment" and "Return" are explained "Investment" may be explained to comprise any of the subsequent:

1.  Gross capital employed:              

Net fixed assets + total current assets + other assets Ratio Analysis

2.  Net capital employed:                

Net fixed assets + net current assets + other assets

3.  Proprietors' net capital:               

Total assets - (Current liabilities + long-term employed borrowing + any other outside funds)

4. Average capital employed:       

Opening + closing balances of capital, reserves, accumulated depreciation and borrowings/2

As the same, 'Return' may be explained to include any of the subsequent:

1 Gross profit

2 PBDIT that is Profits before depreciation, interest and taxes

3 Profits before depreciation, interest and taxes but excluding capital and extraordinary nary profits: PBDIT

4 PBT that is Profits before tax

5 Profits before tax but excluding capital and extraordinary profits as: PBT, the subsequent versions of ROI are utilized in practice as:

1. Gross Return on Investment =Gross Profit/Total Net Assets

2. Net Return on Investment = Net Profit/Total Net Assets

3. Return on Capital Employed that is (ROCE)                                                              

= Profit before tax + Interest/Net Worth+ Interest bearing debt.

4. ROI (based on PBDIT) is = PBDIT as per cent of average capital   Employed

5. ROI (based on PBT)

= PBT average of capital and Investment Analysis as percent of reserves