B2B marketing
LinkedIn Ads
for B2B.
LinkedIn is the one platform where you can target by job title and company, which is why B2B uses it. It isn't cheap, so the job is to pick an audience big enough to run but tight enough to matter, put a person's voice in front of it, and measure on pipeline through the Conversions API, not on clicks.
Written by Dan Picken, a marketer who checks the sources. Last checked 2 November 2026.Big enough,
not too big.
LinkedIn has over a billion members worldwide, and its ANZ country manager put Australian membership at 15 million in 2024. A campaign needs at least 300 matched members, and LinkedIn recommends much larger audiences for most formats. Check the current numbers in Campaign Manager.
A tight list of 400 target companies with a few roles each can work for account-based campaigns. A broad audience suits building awareness over months. Most of the waste comes from audiences too small for the budget, so the same people see the same ad again and again.
Layer targeting carefully. Company list plus job function plus seniority can shrink an audience fast. Start broader than feels comfortable, watch which job titles engage in the demographics report, and tighten from evidence rather than guesswork.
Audience sense-check
Is your LinkedIn audience
big enough?
Put in your target list and budget. It estimates how many people you can reach and how often they'd see you. The cost per 1,000 impressions is an assumption: use your own from Campaign Manager.
Estimated audience
Impressions per person a month
What to
put in front of them.
Thought Leader Ads sponsor posts from your people, customers or experts, with the author's approval. A post from a named person often reads as advice, where a company ad reads as an ad.
Remember most of the audience isn't buying this quarter. The hub explains the 95:5 idea: only a small share of buyers are in market at any time. Ads that teach something useful keep you remembered until they are.
Measure
on pipeline.
The Conversions API lets you send results from your CRM to LinkedIn: hashed email, LinkedIn's click ID and lead form IDs. Marketing-qualified and sales-qualified lead conversion types were added in the API's August 2026 version, and lead conversions can use a 365-day attribution window if you set it on the conversion rule. Complete data can take up to 72 hours to show in reports.
Send the stage that means something to your sales team, so LinkedIn optimises for it. Form fills alone reward the people most willing to download a PDF.
Budget and
patience.
LinkedIn clicks usually cost more than search clicks, and most of the audience isn't ready to buy. That makes short tests misleading: two weeks of spend tells you about click-through rates, not pipeline.
A steadier approach is a modest, continuous budget aimed at a well-defined audience, with ads refreshed every month or two, judged on qualified pipeline over a quarter. Use the stage value tool to work out what a qualified lead is worth, and the same number tells you what LinkedIn can afford to pay for one.
What I see most often
What I see
most often.
- 1
Audiences of a few hundred
Hundreds of people, with a budget that shows each of them the same ad every day.
- 2
Company page posts as ads
Brand announcements promoted to people who have never heard of the company.
- 3
Lead forms judged on volume
Cost per form fill reported as success, with no check on which became opportunities.
- 4
One ad for months
The same creative running until frequency is through the roof.
The honest bit. LinkedIn is expensive per click, and that's fine if the right people see you. If your buyers are a handful of named companies, sales outreach may beat ads.
Questions
people ask.
Is LinkedIn advertising worth it for B2B?
Often, when job title and company targeting matter. Judge it on qualified pipeline, not clicks, and give it months rather than weeks.
What is the minimum audience for LinkedIn ads?
300 matched members, though LinkedIn recommends much larger audiences for most campaigns.
What are LinkedIn Thought Leader Ads?
Sponsored posts from a real person, such as an employee or customer, with their approval.
What is the LinkedIn Conversions API?
A way to send conversions from your CRM to LinkedIn, including qualified leads, so campaigns can be measured and optimised on pipeline.
Related
Keep
going.
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