A free event with three hundred registrations and a hundred and twenty people in the room is not an unusual outcome — it's close to the default one. Free registration costs the person nothing to commit to and nothing to abandon, which means the number on the registration list has always meant something different from the number that will actually walk in, and treating them as the same figure is where planning goes wrong before the event even starts.
Why free registrations don't predict attendance
Paying for a ticket is itself a commitment device — money already spent makes skipping the event feel like a loss, not just a missed afternoon. A free registration carries none of that weight. It costs nothing to register on a whim, in a moment of interest that fades by the following week, and it costs nothing to simply not show up when something else comes up. This isn't a flaw in the audience; it's what free registration structurally is, and any forecast built on the assumption that a free list converts like a paid one will overestimate the room.
Reminders that actually change behaviour
A single reminder email the morning of the event catches people who already intended to come and simply needed the nudge — it does very little for people whose intent was already thin. What moves the number is a short sequence: a reminder far enough out that it's still useful for planning the day, one closer to the date that reintroduces urgency, and a final one on the day itself that includes the practical detail — the exact address, the parking situation, the start time restated plainly — that removes the last small reason to change plans.
Commitment devices that raise the odds without adding friction
Small commitments made after registration but before the event raise attendance without adding real friction to the sign-up itself: a calendar invite the person actually accepts, a short pre-event email asking them to confirm they're still coming, a waitlist for a capped free event that makes the spot feel claimed rather than automatically granted. None of these are foolproof, but each one adds a small additional moment of commitment beyond the original, costless click.
Forecasting the room honestly
Planning catering, seating or staffing against the raw registration count is a common and avoidable mistake. A realistic planning number for a free event is meaningfully lower than the registration count, and the exact ratio is specific enough to the audience and event type that it's worth tracking honestly after every event rather than assuming a rule of thumb from elsewhere will hold. Two events with the same registration number can attract completely different rooms depending on how motivated that particular list actually was.
Where this fits with the rest of the promotion plan
None of this replaces getting people to register in the first place — the audience-building work that fills the list still matters most. But a list that converts to attendance is worth more than a longer list that mostly doesn't show, and the difference between them is decided in the weeks between registration and the event, not on the day itself.
Our marketing team builds the reminder and confirmation sequence alongside the registration push itself, because the gap between the two numbers is closed there or not at all.
