Basic: small software company, top-down
A bootstrapped SaaS company wants to know its operating profitability from the income statement. Revenue is $1,000,000, COGS (hosting and customer support) is $200,000, and operating expenses (engineering, sales, G&A) are $600,000.
ResultGross profit $800,000. EBIT $200,000. EBIT margin 20.0%, which the calculator flags as Good operating efficiency.
The top-down formula is EBIT = Revenue − COGS − OpEx. Here that's $1,000,000 − $200,000 − $600,000 = $200,000. Dividing by revenue gives a 20% EBIT margin, in line with healthy software companies that have not yet scaled into the >25% range typical of mature SaaS leaders.