Enter the current security value ($) and the previous security value ($) into the Return on Security Calculator. The calculator will evaluate and display the Return on Security. 

Return on Security Formula

The following formula is used to calculate the Return on Security. 

ROS = (CSV-PSV) / PSV * 100

  • Where ROS is the Return on Security (%)
  • CSV is the current security value ($) 
  • PSV is the previous security value ($) 

How to Calculate Return on Security?

The following example problems outline how to calculate Return on Security.

Example Problem #1:

  1. First, determine the current security value ($). 
    • The current security value ($) is given as: 500.
  2. Next, determine the previous security value ($). 
    • The previous security value ($) is provided as: 300.
  3. Finally, calculate the Return on Security using the equation above: 

ROS = (CSV-PSV) / PSV * 100

The values given above are inserted into the equation below and the solution is calculated:

ROS = (500-300) / 300 * 100 = 66.67 (%)


Example Problem #2: 

For this problem, the variables needed are provided below:

current security value ($) = 600

previous security value ($) = 400

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer. 

ROS = (CSV-PSV) / PSV * 100 = ?