Return on investment for an event: (Event Value - Event Cost) / Event Cost. Includes soft revenue, brand lift, and pipeline.
Event ROI (return on investment) measures whether your event created more value than it cost: (event value − event cost) ÷ event cost × 100. An ROI of 100 percent means the event generated twice what it cost.
The hard part is the numerator. Direct revenue (tickets, sponsorships, exhibitor fees) is easy to count. But most B2B event value is indirect: qualified leads, pipeline influenced, deals accelerated, customer retention, and brand lift. Mature teams assign a monetary value to each of these using their CRM attribution model.
Include everything: venue, catering, AV, marketing spend, platform costs, travel — and the often-forgotten internal staff time. A realistic cost baseline is the difference between an honest ROI and a vanity number.