Understanding B2B lead generation ROI is essential for companies that want predictable revenue growth. This guide explains the exact formula used to measure the real return on investment from lead generation programs. Learn how to calculate ROI using revenue generated, lead generation costs, pipeline value, and customer lifetime value. We also break down the most important metrics every B2B team must track, including cost per lead, cost per opportunity, pipeline generated, and closed-won revenue. Discover why many companies calculate ROI incorrectly and how better attribution and forecasting can dramatically improve results. With practical examples and proven strategies, this guide helps marketing leaders, sales teams, and executives understand the true financial impact of their lead generation efforts. If you want to increase revenue, reduce acquisition costs, and build a scalable pipeline, mastering B2B lead generation ROI measurement is the first step toward smarter, data-driven growth.