Facebook Ads for B2B: The Complete Guide for Small Businesses
Everyone says "LinkedIn for B2B, Facebook for B2C." They're half right. Facebook is terrible for cold B2B prospecting. It's brilliant for everything else. Here's how to use it properly.
James Green
20 min read
The 60-Second Version
Facebook works brilliantly for B2B in these scenarios: retargeting website visitors, reaching small business owners, building lookalike audiences, and cold prospecting in broad industries (construction, restaurants, trades, retail) where interest targeting is good enough.
Where it's weaker: precise job-title targeting (e.g., "CFOs at 50-200 person manufacturers"). For that level of precision, use LinkedIn. But don't write off Facebook for all cold B2B. it depends on your audience.
Budget: Start with £300-600/month for retargeting. Scale to £1,500/month for cold + retargeting.
First step: Install the Meta Pixel on your website. Without it, nothing else works.
Why Facebook Actually Works for B2B (When Used Correctly)
Decision-makers don't stop being people when they leave LinkedIn. The Operations Director who ignores your LinkedIn InMail during work hours is scrolling Facebook at 8pm. Your CFO prospect is on Instagram on Saturday morning.
The difference: on LinkedIn, you're competing with every other B2B advertiser for a premium slot. On Facebook, your B2B ad is competing with holiday photos and recipe videos. Your ad stands out because it's the only business-related thing in the feed.
And here's the real advantage: Facebook's CPMs are £5-15. LinkedIn's are £25-45. For the price of showing your ad to 1,000 people on LinkedIn, you can show it to 3,000-5,000 people on Facebook. If you're retargeting people who already know you, that reach advantage is massive.
B2B Targeting on Facebook: The Workarounds That Actually Work
Facebook doesn't have LinkedIn's job title targeting. You can't select "CFOs at manufacturing companies with 50-200 employees." But there are workarounds that are surprisingly effective:
Custom Audiences: Your Email List
Upload your CRM contacts, email subscribers, or past client list. Facebook matches roughly 50-70% of B2B emails. This is your warmest audience and the cheapest to convert.
Website Retargeting
Anyone who visited your website in the last 180 days. They already know who you are. Segment by page visited: pricing page visitors are hotter than blog readers.
Business Page Admins
Facebook lets you target people who admin a business page. This is a surprisingly good proxy for business owners and marketing decision-makers. Not perfect, but effective for SMB targeting.
Lookalike Audiences
Upload your best customer list. Facebook finds people who look like them. A 1% lookalike of your top 100 clients is usually better than any interest-based targeting you can build manually.
Interest Stacking
Combine industry interests (e.g., 'CNC machining' + 'manufacturing equipment') with behaviour signals (business page admin + frequent traveller). Layer demographics (age 30-55). Not LinkedIn-precise, but workable.
Facebook vs LinkedIn: Cost Comparison for B2B
| Metric | ||
|---|---|---|
| CPC | £0.50-3.00 | £8-15 |
| CPM | £5-15 | £25-45 |
| CPL (cold) | £15-50 | £75-180 |
| CPL (retargeting) | £5-20 | £30-80 |
| Lead quality (cold) | Lower | Higher |
| Lead quality (retarget) | High | High |
| Job title targeting | Limited | Excellent |
| Min viable budget | £300/mo | £300/mo (starter test), £1,500/mo to scale |
The smart play
Use LinkedIn for cold targeting (specific job titles, industries). Use Facebook to retarget everyone LinkedIn sends to your website. You pay LinkedIn's premium price once. Then you retarget at Facebook's cheap price for months.
Read our full platform comparison →
B2B Facebook Campaign Structure (Copy This)
Here's the campaign structure that works for most B2B companies with budgets under £5k/month:
Campaign 1: Retargeting
40% of totalObjective: Conversions
Audience: Website visitors (last 90 days)
Creative: Case studies, testimonials, direct CTA to book a call
This is your highest-ROI campaign. Start here.
Campaign 2: Warm Nurture
20% of totalObjective: Traffic/Engagement
Audience: Email list custom audience + engaged visitors
Creative: Educational content, tips, industry insights
Keep you top of mind without hard selling.
Campaign 3: Lookalike Prospecting
30% of totalObjective: Lead Generation
Audience: 1% lookalike of best customers
Creative: Problem-aware content, lead magnets, free tools
Wider funnel. Expect lower quality but higher volume.
Campaign 4: Social Proof
10% of totalObjective: Engagement
Audience: Pricing page visitors (last 30 days)
Creative: Client results, company credibility, team content
For people close to a decision. Reduce risk perception.
B2B Facebook Ad Creative That Actually Works
B2B ads on Facebook need to work differently than on LinkedIn. The feed is casual. Your ad is between someone's holiday photos and a meme their uncle shared. If your ad looks like a corporate brochure, people scroll past it faster than anything.
What works:
Raw video testimonial
A client talking to camera about their experience. Phone-quality is fine. Actually, phone-quality is better because it looks real.
Before/after results
Show a dashboard, a metric, a transformation. Concrete proof that something changed. Numbers beat adjectives.
Problem-first copy
'Still chasing the same 3 leads from that trade show 6 months ago?' Hit the pain point in the first line. Then offer the solution.
UGC-style selfie ads
Founder or employee talking direct to camera. 'POV: your competitor just stole your biggest client.' Feels native to the feed.
Need creative inspiration?
See our 4 B2B ad concepts you can steal with full mockups and breakdown of why each format works.
Don't Skip This: Install Your Meta Pixel First
Everything in this guide depends on having the Meta Pixel installed on your website. Without it, you can't retarget visitors, track conversions, or build lookalike audiences. It takes 15 minutes to set up properly.
Follow our Meta Pixel setup guide →Frequently Asked Questions
Want Help Setting Up B2B Facebook Ads?
Book a free call. We'll look at your current setup and tell you whether Facebook, LinkedIn, or both makes sense for your business.
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