How many registrants do you actually need?
Pick the number before you spend a dollar. Promotion that chases traffic burns cash; promotion with a target spends it. So work backward from money. Start with a revenue goal and apply two rates that hold up in the real world: about 40 percent of registrants show up live, and a selling webinar converts those 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 that means roughly 1,650 registrants. Now the promotion has a size. If 1,650 feels out of reach, your fix is not more traffic. Lower the goal, raise the price, or tighten the offer until the math closes.
Which channels fill a webinar, and what they cost
Stack your channels in order of trust. The warm sources at the top are cheap and convert well, but they run out. The cold sources at the bottom never run out, but they cost real money per head. The order is the strategy: drain the top before you pay for the bottom.
| 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 runs through the whole table: the warmer the audience, the cheaper the registrant. A name on your own list can cost you nothing. A cold click on LinkedIn can run $10 or more for the same seat. That gap is exactly why paid ads come last, not first.
What does a registration ad or post look like?
One promise, one timeframe, one button. The mistake most hosts make is selling the product in the ad. Do not. Sell the free session, because that is the only thing someone can say yes to right now. Here is a line you can steal and rework:
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
Look at the moving parts. A specific outcome (doubled show-up rate). A concrete deadline (Thursday 1pm). A reason to act now. And the replay promise, which alone pulls in registrations from everyone who cannot make the live time. Swap the topic, keep the shape.
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The 2-week promotion timeline
Registrations do not arrive in a steady stream. They land in two bursts: the first 48 hours after you open the page, and the final 48 hours before you go live. The week in between is a graveyard. So front-load and back-load your effort. Dribbling the same push out evenly across 14 days wastes both ends.
| 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 compounds if you know where each registrant came from. Tag every signup by source (list, partner, ad, affiliate) and by behavior (registered, attended, no-show). Then your reminders and follow-ups talk to the right people instead of blasting everyone the same message. You can stitch that together across tools, or capture and tag registrants automatically with an all-in-one platform like Webinly. The tags are what turn a one-off push into a machine you can run again next month.
What to do once people register
Filling the room is only half the job. The other half is getting those registrants to actually show up, and that fight is won or lost on your reminder cadence. Show-up rates live in a brutal 35 to 50 percent band, and a sharp sequence of confirmation and reminder emails is what drags you to the top of it. Next move: steal the cadence. Read how to increase webinar attendance and lift the exact webinar email sequence that does the heavy lifting.