How many registrants do you actually need?
Promotion gets easier once it has a target. Work backward from money, not from traffic. Start with a revenue goal, then apply two realistic rates: roughly 40 percent of registrants show up live, and a typical selling webinar converts attendees at 2 to 5 percent.
Say you want $10,000 from a $500 offer. That is 20 sales. At a 3 percent live conversion you need about 667 attendees, and at a 40 percent show-up rate you need roughly 1,650 registrants. Now you know the size of the promotion. If that number feels out of reach, lower the goal, raise the price, or tighten the offer rather than hoping more traffic fixes it.
Which channels fill a webinar, and what they cost
Stack channels in order of trust. The warm sources at the top are cheap and convert well but are finite. The cold sources at the bottom scale but cost more per registrant. Start at the top, exhaust it, then move down.
| Channel | Best for | Rough cost per registrant | First action |
|---|---|---|---|
| Owned email list | The cheapest, warmest registrants | Near zero (just send time) | Send a 3-line invite to your whole list today |
| Partnerships / JVs | Borrowed trust at scale | Revenue share, not cash | DM 5 peers with the same audience to co-promote |
| Retargeting | Closing warm visitors who didn't register | $1 to $3 per registrant | Run one ad to site and content visitors from the last 30 days |
| Organic social | Free reach to your own following | Time only | Post the invite plus a swipe-able carousel of what they'll learn |
| Paid ads (Meta/LinkedIn/YouTube) | Reaching brand-new cold people | $4 to $15 per registrant | Launch one cold campaign with a single clear promise |
| Communities | Niche audiences in Slack, Discord, forums | Time and goodwill | Share the invite where the rules allow, lead with value |
| Affiliates | Pay only for results | 20 to 50 percent of sales | Give affiliates a tracked link and swipe copy a week out |
One pattern holds across every channel: the warmer the audience, the cheaper the registrant. A name on your own list might cost you nothing; a cold click on LinkedIn can run $10 or more. That is why you never start with paid ads.
What does a registration ad or post look like?
Keep it to one promise, one timeframe, and one button. Do not sell the product in the ad; sell the free session. Here is a line you can adapt:
Free live class, Thursday 1pm ET: the 3-email sequence that doubled our webinar show-up rate. Steal the exact templates. Save your seat (replay included).A registration ad you can adapt
Notice the parts: a specific outcome (doubled show-up rate), a concrete deadline (Thursday 1pm), a reason to act now, and the replay promise that lifts registrations from people who cannot make the live time. Swap the topic, keep the shape.
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The 2-week promotion timeline
Registrations are not evenly spread. They cluster in two bursts: the first 48 hours after you open the page, and the final 48 hours before you go live. The middle is quiet. So front-load and back-load your effort instead of dribbling it out evenly.
| Window | What to do |
|---|---|
| Day 1 to 2 (open) | Front-load hard. Email your full list, post organically, and DM partners. Most registrations land in this first 48-hour burst. |
| Day 3 to 7 | Steady drip. Turn on retargeting and cold ads, publish in communities, and send affiliate swipe copy. Keep the page live and topical. |
| Day 8 to 12 | Mid-window nudge. Email non-openers again with a fresh angle, share a teaser clip, and remind partners to mail their lists. |
| Day 13 to 14 (close) | Back-load hard. Send "last chance to register" emails, raise ad budgets, and post a "starts today" reminder. The final 48 hours rival the opening burst. |
Capture and tag every registrant so you can promote smarter
Promotion only pays off if you can tell where each registrant came from and follow up accordingly. Tag every signup by source (list, partner, ad, affiliate) and by behavior (registered, attended, no-show) so your reminders and follow-ups speak to the right people. You can stitch that together across tools, or capture and tag registrants automatically with an all-in-one platform like Webinly. Either way, the data is what turns a one-off push into a repeatable system.
What to do once people register
Filling the room is half the job; getting registrants to actually show up is the other half, and it is mostly won by your reminder cadence. A strong sequence of confirmation and reminder emails routinely lifts live attendance by double-digit percentage points. See how to increase webinar attendance and the exact webinar email sequence for the messages that do the lifting.