How do we calculate ROI if most of our leads come through self-serve, not phone calls?

For SaaS Companies

For a primarily self-serve, product-led SaaS company, phone calls are typically a smaller volume but disproportionately higher-intent channel, so the ROI calculation looks different than it would for a phone-first sales motion. Start by counting your actual current inbound call volume, most self-serve companies still get some calls, from trial users hitting a wall and wanting to talk to someone before upgrading, from prospects who found you but skipped the self-serve flow because they want enterprise pricing or security questions answered, or from existing customers with account or billing questions. Even at low volume, 10-30 calls a month, these calls often represent your highest-value opportunities precisely because someone chose to call instead of using your in-app or self-serve flow, usually signaling either a stuck trial user close to churning or an enterprise-track buyer who needs a sales-assisted conversation your self-serve flow does not support. The ROI question becomes: what is one converted trial-to-paid upgrade worth, and what is one enterprise deal that started as a phone call worth, multiplied by how many of these calls you are currently losing to voicemail or a generic support inbox. Given Starter's $14 a month covers up to 15 calls, a self-serve company with modest call volume can test this at very low cost, tracking how many of those calls convert to paid upgrades or sales-assisted deals over a month or two before deciding whether Premium's higher volume and CRM integration are worth scaling into.