Event registration numbers are the most misleading figure in marketing. Free webinars routinely see 25 to 40% of registrants attend. Free physical events do a little better. Paid events do much better, because payment is commitment — which tells you exactly what the problem is.
When attending costs nothing, nothing holds anyone to it. A call is the cheapest available substitute for commitment.
Two calls, and the second one does the work
The day before — confirm attendance, catch conflicts, allow a graceful decline. Two-way, since the answer matters and a decline lets you release a seat.
Ninety minutes before — a one-way announcement. Twenty seconds, ₹1.3–1.5 a minute. This is the call that lifts attendance most, because the failure mode for a free event is not reluctance, it is forgetting.
For webinars specifically, the ninety-minute call is where the joining link lands in someone's attention rather than in the twelfth email of the morning.
Ask who else is coming
For physical events this is catering and seating, which is a real cost. For B2B events it is better than that: a registrant bringing two colleagues is a materially more serious prospect than one attending alone, and knowing beforehand lets you plan who talks to them.
Do not qualify on this call
The temptation for a B2B event is enormous — while we have them, let us ask about budget and timeline. It reliably backfires. A registrant who receives a sales-qualification call before an event they have not attended concludes the event is a lead-generation exercise, which it may be, but saying so out loud lowers attendance.
Confirm attendance. Qualify afterwards, when they have received something of value.
The call worth more than both
The follow-up, within 24 hours of the event, to people who attended.
This is where events actually convert, and it is where most organisers stop — a thank-you email, a recording link, and nothing else. A short call asking what they thought and whether anything was relevant to their situation reaches people at the one moment they are warmest, and it distinguishes the attendees who were interested from the ones who watched fifteen minutes with the tab muted.
Keep it to a genuine question rather than a pitch. The people worth talking to will identify themselves in the first fifteen seconds.
Cost
A thirty-second confirmation plus a twenty-second reminder is roughly ₹3 per registrant. For a 500-registrant webinar that is ₹1,500 — against a marketing spend to generate those registrations that is usually two orders of magnitude larger.
Moving attendance from 30% to 50% on that event is 100 extra attendees for ₹1,500. There are very few marketing interventions with that ratio, which is mostly a comment on how badly the registration-to-attendance gap is currently managed.
Demo no-show recovery solves the same problem for one-to-one meetings.