A method is provided for determining a return on investment for software testing. The method includes determining an average cost to correct software errors found in production. The method further includes classifying these software errors based on the size of the application and the size of the error and averaging the cost to correct the errors within each classification. The method additionally includes determining software faults during software testing and classifying these faults based upon the same classifications set forth for the software errors found in production. The method then requires transferring the average cost to correct production errors within each classification to each software fault found during testing with the same classification. The method additionally adds all of the average costs to correct the software errors for each software fault found during testing and subtracts the cost of the testing. The method concludes by displaying the result.