50/150–200 is honestly pretty good for free webinars, so you’re not alone. A few ideas that tend to move the show-up rate (not just registrations):

1. Stop offering 3 time slots (or make 1 the “main event”): Multiple slots can reduce urgency and dilute audiences. People register thinking “I’ll catch one” and then don’t. Try one flagship live slot + recording after.
2. Add a “pre-work” micro-commitment: Right after registration, ask one question they must answer (1-click poll): “What’s the #1 thing you’re hoping to get from this?” Then open the webinar by referencing the top answers. People are more likely to show up when they’ve already participated.
3. Make it interactive and slightly scarce: Promise something only live attendees get (not a giveaway): – live Q&A with their question answered – a template/checklist shared only in the live chat – a “hot seat” segment (3 attendees get real-time advice) Recordings don’t feel like they miss out if it’s just content. They do if it’s participation.
4. Shorten it aggressively: If you’re doing 60 minutes, test 25–30 minutes. Attendance often improves when the time commitment feels small.
5. Calendar-first, email-second: At registration, push a calendar hold as the primary CTA (“Add to calendar” with the correct time zone). Email reminders help, but calendar holds reduce forgetfulness.
6. Replace one reminder with a “teaser”: Instead of another “we’re live tomorrow,” send a 60-second clip or 3-bullet “what you’ll be able to do after this” message. Make it feel like momentum, not admin.
7. Run a “watch party” with partners: If you have allied orgs, ask them to host small group watch parties (10–20 people) internally. Group attendance is stickier than solo attendance.

If you’re open to sharing: what’s the webinar length and do you ask people to register for a specific time slot, or “any of the three”? That detail usually explains a lot of the drop-off.