Most \"retargeting\" on LinkedIn is a cold list
Of 1,927 thought leader ad campaigns in the study, 33% ran on cold targeting (median audience 63,500), 48% on uploaded company or contact lists (23,000) and only 19% on true retargeting of website visitors and ad engagers (5,900). Nearly half of the money is on lists, and almost all of it is described in the account as retargeting or ABM.
Paired within account against cold targeting ★★:
| Audience type vs cold | CPM | Engagement rate | Cost per engagement | Cost per landing page click |
|---|---|---|---|---|
| Uploaded list (n=43) | +11% | −2% | +22% | −3% |
| True retargeting (n=52) | +58% | +25% | +14% | +14% |
On these thought leader ads every confidence interval for the list spans zero, and for retargeting CPM and engagement are significant while both costs span zero. Across all formats, paired in Report No. 7, a list is dearer than cold, +18.2% CPM and +19.7% per landing page click (165 advertisers, significant), while retargeting costs the same as cold (CPM +3.1%, not significant, 156 advertisers). An uploaded list is a cold audience with a higher CPM, not retargeting. It costs $340 per 1,000 people reached against $159 cold, 2.1×, for the same engagement.
Retargeting beats a list in the same account: engagement +40%, cost per engagement −9%, landing page CTR +23%, conversions per click +20% and a directional −47% cost per conversion (n=16 ★). The list defines who you want; it does not make them familiar with you. Familiarity is what retargeting is.
What counts as a warm audience on LinkedIn
LinkedIn Matched Audiences, in order of how warm they actually are:
| Audience | Built from | Warmth | Note |
|---|---|---|---|
| Website visitors | Insight Tag, by page or path, up to 180 days | Warm | The core retargeting pool. Segment by page depth (pricing, case studies, blog). |
| Ad engagers | Any campaign: reactions, comments, shares, clicks | Warm | Thought leader ad engagers are the richest segment |
| Video viewers | 25/50/75/97% of a video ad | Warm, by depth | 75%+ viewers are the best mid-funnel audience most accounts never build |
| Lead form openers | Opened but did not submit | Hot | Small, cheap, high intent |
| Company page visitors / followers | Page engagement | Lukewarm | Useful as an exclusion as much as a target |
| Event registrants | LinkedIn Events | Warm | |
| Uploaded contact or company list | CSV, CRM sync | Cold | An ICP definition, not a warm audience. Run it as cold: engagement objective, wider budget discipline. |
| Lookalike / predictive audiences | Seed audience | Cold | Prospecting, not retargeting |
The 180-day retargeting layer
The structure Kiin builds on every account: three layers, with the middle one missing on most accounts we inherit.
- Top: thought leader ads against a defined account list or cold ICP, on brand awareness if the audience is 30,000+ and cold, engagement otherwise. This is what fills the retargeting pools.
- Middle — the retargeting layer, 180 days: segmented by engagement depth, so the second touch is different from the first. Video viewers 75%+ see a case study. Post engagers see a second thought leader ad from a different author. Site visitors who hit pricing see proof. Lead form openers see the offer again with one field fewer.
- Bottom: conversation ads, lead gen forms, single image to a dedicated landing page — to the retargeting pools, not to cold.
Why 180 days: LinkedIn's maximum window, and B2B sales cycles of three to nine months mean a visitor from month one is still in-market in month six. Most accounts default to 30 or 90 days and throw away the majority of their warm audience.
Which objective for retargeting
Engagement. On a retargeting pool, brand awareness costs more per engagement (a directional result on 7 to 8 accounts). There is nobody extra to reach in a pool of 5,900 people; the cheaper impression buys nothing. Brand awareness is for cold audiences of 30,000+, which is the top layer, not this one. The full decision is in engagement vs brand awareness.
What retargeting costs
Expect CPM and cost per landing page click roughly level with the same account's cold campaigns: across all formats, CPM +3.1% and cost per landing page click +1.2%, neither significant (156 advertisers, Report No. 7). On thought leader ads the CPM premium is larger (+58%), because retargeting pools are small, dense and contested, with cost per landing page click still roughly level (+14%, spanning zero). What retargeting buys is attention: +25% engagement and +20% dwell against cold, and +23% landing page CTR against a list. The place the premium pays back is the bottom of the funnel: retargeting conversation ads produce the cheapest sales-qualified leads on the platform, from $59 per SQL, against $150-$400 on cold, and retargeting beats cold by 2-4× on cost per SQL across the accounts Kiin runs. Cost per lead thresholds by format are on LinkedIn Ads benchmarks.
Because retargeting pools are small, they sit in the budget-pressure zone: a normal $30-$50 a day on 5,000-15,000 people overspends them and drives frequency up. Keep daily budget under $2 per 1,000 members and refresh creative every two weeks, an audience under 10,000 sees a creative once in 14 days. Frequency mechanics are in LinkedIn ad frequency and fatigue.
Retargeting across channels
LinkedIn's CPM is the highest of the B2B platforms, so it is the wrong place to run frequency on an audience you already own. Export LinkedIn engagers and site visitors into Meta for retargeting at a fraction of the CPM; every Google Ads visitor lands in the LinkedIn website-retargeting pool and sees founder content over the next 180 days. That cross-channel loop is the structure on the B2B paid media agency page. Engagement signals also feed outbound: an ad engager at a target account is an SDR trigger, which is the signal-based outbound layer.
What 1,046 advertisers actually run
Retargeting is common and under-funded. In the Kiin Labs panel, nearly two thirds of advertisers ran a retargeting audience at some point in the year, but it carried a fifth of the spend, while uploaded lists, which are cold audiences, carried almost half.
| Audience type | Accounts using it | Share of spend |
|---|---|---|
| Retargeting audience | 64% | 19% |
| Uploaded company or contact list | 61% | 47% |
Accounts with $250 or more of spend outside Audience Network, twelve months to 7 September 2026. The demo ask belongs on the retargeting side: a lead gen form opened from a message ad completes 40.7% of the time against 7.6% in the feed, and the same advertiser pays 57% less per demo lead in the inbox (Report No. 4). How to set the rest of the targeting around it: how to target ads on LinkedIn.
Source: Kiin Labs panel, 1,046 advertiser accounts, 8 Sep 2025 to 7 Sep 2026. Medians across advertiser accounts, USD at ECB rates, LinkedIn Audience Network excluded unless stated. Rows with fewer than 10 accounts are withheld. Re-checked 21 Oct 2026.
Common mistakes
- Calling a list retargeting. Run it as cold and measure it as cold.
- 30- or 90-day windows. Use 180 days; the sales cycle is longer than a quarter.
- One retargeting campaign for everyone. Segment by depth or the second touch is the first touch again.
- Brand awareness on a retargeting pool. +51% to +90% per engagement for nothing.
- No exclusions. Exclude customers, open opportunities and existing engagers from the cold layer, or the top of the funnel pays LinkedIn prices to reach people already in the middle.
- Overspending the pool. $50 a day on 6,000 people is 4× frequency inside a fortnight.
- No conversion layer under it. A warm pool with nothing to convert on is an expensive audience-building exercise.
How to build the account list that feeds the top layer is in how to build a B2B account list; how conversation ads convert the pool is in the conversation ads playbook.