How to Advertise on LinkedIn in the UK: A B2B Small Business Guide
- Aug 13
- 5 min read
Updated: 4 days ago
TL;DR: LinkedIn is the UK's most powerful B2B advertising platform — reaching around 48 million registered members — but also the most expensive, with average costs-per-click of £4–£10. For a small business it pays off when your customer is another business, your deal values are healthy, and you target precisely by job title, seniority and company. Start with a £10–£30 daily test budget, one clear objective and a strong lead magnet.
Is LinkedIn advertising right for your business?
LinkedIn is where professionals go to work, hire and buy. It has more than 1.2 billion members globally and roughly 48 million registered members in the UK — close to two-thirds of the adult population, though that figure counts registrations rather than daily active users.
That professional context is the whole point. If you sell to other businesses — software, consultancy, recruitment, professional services or B2B products — LinkedIn lets you put your message in front of the exact decision-makers who sign off on the purchase. Industry data consistently credits LinkedIn with the lion's share of B2B leads generated through social media, and the large majority of B2B marketers use it for content distribution.
If you sell directly to consumers, though, LinkedIn is usually the wrong tool. The audience is in a work mindset and the costs are far higher than Meta or TikTok. A café, a clothing brand or a local tradesperson will almost always get more for their money elsewhere. Be honest about who your customer really is before you spend a penny.
The LinkedIn ad formats that matter
LinkedIn groups its ads into a few families. For most small businesses, three are worth knowing well.
Sponsored Content appears directly in the feed and is the workhorse. It includes single-image ads, video ads, carousel ads and document ads — the last of which lets you promote a downloadable PDF such as a guide or report, and is one of the best-performing B2B formats for lead capture.
Thought Leader Ads let you promote a post from a named individual — a founder or an in-house expert — rather than the company page. They tend to feel less like advertising and often earn stronger engagement, which makes them a smart, low-cost entry point for a small team with a credible face to put forward.
Sponsored Messaging (Message and Conversation Ads) delivers a note straight to a prospect's LinkedIn inbox, while Text and Dynamic Ads sit in the right-hand rail as cheaper, lower-profile options. Most small firms should start with Sponsored Content and pair it with a Lead Gen Form, which pulls a user's profile details into a pre-filled form so they can enquire in a couple of taps without ever leaving LinkedIn.
How targeting works (and why it costs more)
LinkedIn's advantage is its data. Because members keep their profiles current for professional reasons, you can target by job title, seniority, function, company name, company size, industry and skills — with far more accuracy than platforms that infer this from browsing behaviour.
You can also upload your own contact or company lists to retarget known prospects, and build audience-expansion lists from them. The practical rule is to target tightly enough to reach the right people but broadly enough for the algorithm to optimise: LinkedIn generally recommends an audience of at least a few tens of thousands for most campaigns.
That precision is exactly why LinkedIn is expensive. You are bidding against every other B2B advertiser chasing the same senior decision-makers, and the auction clears high as a result.
What LinkedIn ads actually cost in the UK
Expect to pay a premium. UK cost-per-click figures typically land between £4 and £10, versus well under £2 on Meta, while cost-per-thousand-impressions (CPM) commonly runs at £25 or more. Cost per lead often falls in the £50–£200 range, depending on your sector, targeting and the strength of your offer.
The minimum you can spend is low — £10 per day per campaign — but that rarely buys enough data to optimise properly. In practice, most UK B2B campaigns need somewhere around £1,500–£3,000 a month across a focused set of campaigns to produce reliable results. If your budget is smaller, run one tight campaign well rather than spreading it thin across several.
The maths only works when your customer is worth it. If a new client is worth several thousand pounds over their lifetime, a £120 lead is a bargain. If your product sells for £20, it isn't — and no amount of clever targeting will change that.
Your first campaign: a step-by-step checklist
1. Create a LinkedIn Page. You need one to run Sponsored Content; it is free and takes minutes to set up.
2. Open Campaign Manager and choose a single objective. For most small businesses that is Lead Generation or Website Visits — resist the urge to chase everything at once.
3. Build one tightly-defined audience. Pick two or three targeting criteria (for example job title, plus industry, plus company size). Stacking too many filters shrinks reach and inflates cost.
4. Choose a format. Start with a single-image or document Sponsored Content ad paired with a native Lead Gen Form.
5. Set a test budget of £10–£30 a day for two to three weeks — enough for the algorithm to learn without over-committing.
6. Write for the scroll. Lead with the customer's problem, keep it jargon-free, and make one clear ask.
7. Install the LinkedIn Insight Tag on your website so you can track conversions and retarget visitors later.
8. Measure cost per lead, not clicks. Give a campaign a fortnight before you judge it, then cut what underperforms and put more behind what works.
Getting more from your budget
A few habits separate profitable LinkedIn advertisers from the rest. Offer genuine value up front — a useful guide, a template or a webinar — rather than a hard sell to a cold audience. Use Lead Gen Forms to strip out friction. Retarget people who engaged but didn't convert, since they are far cheaper to reach a second time. And refresh your creative every few weeks, because B2B audiences are small and ad fatigue sets in quickly.
Quick FAQ
How much do I need to spend on LinkedIn ads?
You can start at LinkedIn's £10-per-day minimum, but most UK B2B campaigns need around £1,500–£3,000 a month to gather enough data and generate steady leads. Test small, then scale what works.
Are LinkedIn ads worth it for a small business?
Yes — if you sell to other businesses and your average deal is worth hundreds or thousands of pounds. The high cost per lead is justified by high-value customers. For B2C or low-ticket products, Meta or TikTok usually deliver better value.
What's the best LinkedIn ad format for lead generation?
Sponsored Content — especially single-image and document ads — paired with a native Lead Gen Form. Thought Leader Ads from a founder are also strong, and often cheaper because they feel less like advertising.
Why are LinkedIn ads more expensive than Facebook?
You're paying for precision. LinkedIn's verified professional data lets you target by job title, seniority and company, and you bid against other advertisers for the same senior decision-makers — pushing UK CPCs to £4–£10 versus under £2 on Meta.
— Alicia Morris, Creative & Campaigns Writer at Marketing Minute
The takeaway: LinkedIn rewards precision, not budget. Confirm your customer is a business, target a tight set of decision-makers, offer something genuinely useful, and measure cost per lead — and even a modest test budget can grow into a reliable B2B pipeline.
Have you tried advertising on LinkedIn for your business — and did the results justify the cost?
If you would like to know more about this topic, please contact us on danieln@merxmarketing.co.uk
Related reading
Written by Alicia Morris, Creative & Campaigns Writer at Marketing Minute
Comments