RETURN ON SECURITY INVESTMENT (ROSI) CALCULATOR

How to Use the ROSI Calculator

The ROSI Calculator estimates the financial value of a security investment by comparing the reduction in expected loss to the cost of the solution.

Enter your data in the (1) Incident Cost and (2) Protection Investment blocks. Each field displays a brief explanation of what value you should enter.

View Live Results as the calculator processes your data.  

Interpretation

If you see a positive ROSI, your control is earning more value than it costs—well done!

If your ROSI is negative, consider reviewing your inputs or evaluating whether other options might yield better value.

Note: ROSI supports risk-based decision-making but should be considered alongside regulatory, operational, and safety factors.s.