The short answer
Your cost per demo isn't set by how much you spend. It's set by how much you spend per person in your audience.
Every time you double the monthly budget per person, you get about 52% more demos, and each one costs about 31% more. There is no cliff where demand capture suddenly stops working. The price just keeps rising. So the right capture budget is the point where the next demo costs more than a demo is worth to you. Everything above that belongs in demand gen, because demand gen grows the audience you capture from.
The question everyone asks
"How much of our LinkedIn budget should go into demo campaigns, and how much into demand gen?"
The usual answers are fixed ratios: 60/40, 70/30, 95:5. They ignore the one thing that actually sets your cost per demo, which is how hard you push each person in your audience.
We looked at what really happens when advertisers spend more on demo capture.
What we analysed
- $4.5M of demo capture spend, 14,500 demo leads, 561 campaigns, 140 advertisers on LinkedIn, Oct 2025 to Sep 2026.
- Demo offers only: lead gen forms and inbox ads asking for a demo, audit, trial, quote or a call. Forms that also offered content or events were left out.
- Each campaign compared with itself, month to month. Audience, offer and creative stay fixed, so the only thing changing is how much was spent per person.
- Spend converted to US dollars. LinkedIn Audience Network excluded.
- Dollar figures are set so the typical advertiser matches the median cost per demo (about $350) in our LinkedIn demo request benchmarks.
What a capture budget buys you
For a 25,000 person audience:
| Monthly budget | Per 1,000 people | Demos a month | Cost per demo |
|---|---|---|---|
| $250 | $10 | 1.6 | about $155 |
| $500 | $20 | 2.5 | about $200 |
| $1,000 | $40 | 3.8 | about $265 |
| $2,000 | $80 | 5.7 | about $350 |
| $4,000 | $160 | 8.7 | about $460 |
16 times the budget buys about 5 times the demos.
The audience size changes everything. The same $1,000 a month into 100,000 people gets about 6.5 demos at around $155 each. Into 5,000 people it gets about 2 demos at around $505 each. Same budget, three times the cost per demo.
Why each demo gets dearer
It isn't that LinkedIn charges you more. Within the same campaign, CPM barely moves as spend rises (+5 to 8% per doubling).
Our best explanation is who your money reaches. In LinkedIn's reach data for a smaller set of feed lead gen campaigns (43 advertisers), extra spend reaches fewer new people as budgets rise: reach grows 42% per doubling at higher budgets instead of 65% at lower ones, while frequency grows faster. More of each extra dollar goes on showing the same people the ad again. This is an inference: we haven't directly tied frequency to cost per demo, but it fits the pattern.
Retargeting vs cold: where the money works hardest
Comparing the same advertisers running both:
- For demos, retargeting wins. Cold demo campaigns cost about 40% more per demo than retargeting, once gift card offers are taken out. Retargeting was cheaper for 11 of 13 advertisers.
- Cold gets expensive fastest when you scale. Each doubling of budget per person adds about 61% to cold cost per demo, against about 15% for retargeting and almost nothing for uploaded lists.
- For content offers (guides, reports), there's no difference. Across 41 advertisers, cold and retargeting cost the same per lead.
That makes sense. A stranger will download a free guide. They rarely book a call.
The catch: retargeting audiences are small. The typical retargeting pool is about 6,600 people, and advertisers already run them at about $89 per 1,000 people a month, four times harder than cold. Most teams can't simply move more budget into retargeting. They have to grow the pool first.
Where's the ceiling?
We couldn't find one in the data. Demos keep rising all the way to $1,000 per 1,000 people a month.
The real ceiling is how many companies are actually buying. A rough way to size it:
- Divide your audience by the size of a buying committee (about 5 people). 25,000 people is about 5,000 companies.
- Divide by how often companies switch vendor. On a 3 year cycle, about a third buy each year, so about 1,650 companies.
- At $1,000 a month you'd book about 45 demos a year. That's under 3% of this year's buyers.
Capture only reaches the buyers who are ready now and willing to take a call from an ad. Everyone else buys from whoever they already know, which is the job of demand gen.
How to set your capture budget
- Work out what one demo is worth. Deal size × demo to close rate.
- Start at about $20 to $40 per 1,000 people a month in your capture audience. That's where demos are cheapest.
- Double only while the next demo is worth it. Each extra demo costs about 1.7 times your current average.
- Put capture budget into warm audiences first. Retargeting holds its price as you scale; cold does not.
- Put everything above that into demand gen. It grows the retargeting pool, and that is the only way to buy more demos without paying more for each.
The takeaway
Don't ask what percentage of budget should go to demand capture. Ask how much you're spending per person in your capture audience. Spend until the next demo costs more than it's worth, keep capture on warm audiences, and use demand gen to grow the audience instead of pushing the same people harder.
Related Kiin Labs research
- LinkedIn demo request benchmarks: what a demo costs on LinkedIn, by offer and format.
- LinkedIn lead gen forms benchmarks: form completion and cost per lead.
- LinkedIn conversation ads benchmarks: inbox ads, which carry most demo capture spend.
- How much LinkedIn Ads cost: CPM, CPC and what drives them.
Where should your capture budget stop? Send read access to your LinkedIn Ads account and we'll show you what you spend per 1,000 people in each capture audience, and what your next demo is likely to cost.Free. Read-only access. One page.
Method notes
- Kiin panel, Oct 2025 to Sep 2026. Demo curve: 561 campaigns, 140 advertisers, $4.5M, 14,500 demo leads. Poisson model of monthly demo leads on spend per 1,000 audience members, campaign and month fixed effects, bootstrap by advertiser. Cost per demo +31% per doubling (range +10% to +52%); feed +17%, inbox +32%, without the 5 biggest advertisers +40%.
- Dollar figures: the curve is measured as ratios. Dollar levels are set so $80 per 1,000 people matches the median cost per demo of about $350 in our LinkedIn demo request benchmarks.
- Reach and frequency: 148 feed lead gen campaigns (demo and content offers), 43 advertisers with LinkedIn monthly reach data. Used as a likely explanation, not a direct test of what drives demo cost.
- Cold vs retargeting: same advertiser, $1k+ and 3+ leads on each side. Audience type classified from audience names, so it is approximate.