Customer Lifetime Value Calculator — illustrative example INPUT Illustrative model: USD 40 monthly revenue per customer, 75% gross margin and a 10-month expected paid lifetime. RESULT Revenue LTV: USD 400. Gross profit LTV: USD 300 before acquisition and other excluded costs. This estimate assumes the supplied lifetime and margin remain representative. REVIEW Lifetime value estimates are sensitive to retention assumptions. Label simple models as estimates and keep revenue lifetime value separate from contribution or gross profit lifetime value. This is a teaching example, not a live execution record.