LinkedIn Ads: when the high CPCs are worth it
LinkedIn CPCs make marketers wince. £6–£12 per click is standard. Compared to Google Search (£1–£4 for many industries) or Meta (often under £1), LinkedIn feels expensive. But CPC is the wrong metric to judge a B2B channel by.
The right question isn't "Is my CPC too high?" It's "Is my cost per qualified lead sustainable given my deal size?"
Why LinkedIn CPCs are naturally high
LinkedIn's audience is smaller and more professionally qualified than any other ad platform. You can target by job title, company size, industry, seniority, and skills – with remarkably accurate data because users maintain their own profiles for career reasons.
This precision costs money. When you're targeting "VP of Marketing at SaaS companies with 50–200 employees in the UK", you're competing in a tiny auction pool with other B2B advertisers who want exactly the same audience. High demand, low supply, high CPCs.
The B2B maths that changes everything
Consider two scenarios:
| Metric | Google Ads | LinkedIn Ads |
|---|---|---|
| CPC | £3 | £8 |
| Landing page conversion rate | 4% | 6% |
| Cost per lead | £75 | £133 |
| Lead-to-qualified rate | 15% | 40% |
| Cost per qualified lead | £500 | £333 |
| Close rate | 10% | 15% |
| CAC | £5,000 | £2,220 |
LinkedIn's CPC is nearly 3x Google's, but the CAC is less than half. The difference is lead quality – LinkedIn's targeting puts your ad in front of actual decision-makers, not just anyone searching for a related keyword.
When LinkedIn is worth it
- High average contract value. If your annual contract value is £10,000+, a £2,000–£3,000 CAC via LinkedIn is very sustainable. If you're selling a £20/month tool, it's not.
- Long sales cycles. LinkedIn's 30-day attribution window and professional context suit B2B buying cycles. People who engage with your LinkedIn content are often in research mode at work – exactly when you want to reach them.
- Precision targeting matters. If you need to reach specific job titles at specific company sizes in specific industries, no other platform comes close. Google catches intent; LinkedIn catches identity.
- Your content converts on professional context. Whitepapers, case studies, and webinar sign-ups perform well on LinkedIn because the audience is in a professional mindset.
When to cut LinkedIn
- Your deal size doesn't support the CAC. If average contract value is below £2,000/year, LinkedIn's CPCs likely make the unit economics unworkable.
- Lead quality isn't materialising. If your lead-to-qualified rate on LinkedIn is similar to Google (15–20%), the targeting advantage isn't working. Check your audience settings – you may be targeting too broadly.
- You're optimising for clicks instead of conversions. LinkedIn's algorithm can chase cheap clicks if you let it. Always optimise for conversions or lead generation, not clicks or impressions.
How to evaluate your LinkedIn spend
Track these metrics weekly:
- Cost per qualified lead – not cost per lead. Only count leads that meet your qualification criteria.
- Lead-to-opportunity rate – what percentage of LinkedIn leads become real sales opportunities?
- CAC – total LinkedIn spend divided by closed deals attributed to LinkedIn.
- CAC payback period – how many months of contract revenue to recoup the acquisition cost?
If your CAC payback period is under 6 months, LinkedIn is working. Under 12 months, it's probably worth continuing. Over 18 months, it's time to rethink.
Key takeaway: Don't judge LinkedIn by its CPCs. Judge it by its CAC. A £8 click that produces a £50,000 contract is infinitely better than a £0.50 click that produces nothing. AdRoaster helps you see past the CPC and track what actually matters – qualified leads and real revenue per channel.