About this calculator
Calculate return on investment percentage and net return.
ROI does not account for time, risk or cash-flow timing.
Formula
ROI = (return − cost) ÷ cost × 100.
Example
12,000 return on 10,000 cost = 20% ROI.
Accuracy
NUMTX shows the assumptions next to the calculation so you can replace defaults with values that match your situation. For measurements, supplier rates, fees, interest, tax or regulated work, confirm important figures with the appropriate official or professional source.