B2B Lead Generation: A UK Guide to Strategy and Results

B2B lead generation is the work of finding businesses that could buy from you, earning their attention and turning that interest into sales conversations. Done well, it’s a system rather than a campaign: a defined audience, two or three channels you can measure, an agreed handover from marketing to sales, and reporting tied to revenue instead of form fills. Most B2B firms don’t lack leads so much as a way to tell the good ones from the noise and follow them up fast. This guide covers each part of the system, with the numbers to back it up, so you can build it in-house or judge an agency properly.

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TL;DR

• B2B lead generation means finding businesses that could buy from you and moving them from first interest to a sales-ready conversation.
• Only a small share of buyers are in the market at any moment, so you need to be findable now and remembered later.
• Write down what a marketing-qualified lead (MQL) and a sales-qualified lead (SQL) mean before you spend a penny, and get sales to sign it.
• Combine inbound visibility (search, AI answers, content, paid media) with focused outbound, and judge both on pipeline and revenue.
• There’s no universal “good” cost per lead. Work it out backwards from what a customer is worth to you.

Table of Contents

• What is B2B lead generation?
• MQLs, SQLs and why the definitions matter
• Building a B2B lead generation strategy
• Inbound channels that attract buyers
• Outbound tactics that start the conversation
• How to judge cost per lead and lead quality
• What a B2B lead generation agency does
• A simple 90-day starting plan
• Our perspective
• Working with Castle on lead generation
• FAQ
• Sources

What is B2B lead generation?

B2B simply means business to business: one company selling to another rather than to the public. SAP defines B2B lead generation as identifying other businesses as potential buyers of your products or services, and lists tactics from cold calling and direct mail to social campaigns.

The definition is easy. The practice is harder, for two reasons. First, the buyer is rarely one person. Someone spots the problem, someone else researches suppliers, and a third person signs off the budget, so you’re persuading a small committee over weeks or months rather than one person in a single click. Second, most of the businesses that will eventually buy from you aren’t looking yet.

Most of your future buyers aren’t ready yet

Peter Weinberg and Jon Lombardo of LinkedIn’s B2B Institute popularised what they call the 95:5 rule, based on work by Professor John Dawes of the Ehrenberg-Bass Institute. Their estimate is that only around 5% of B2B buyers are in the market right now. The reasoning is simple: businesses switch suppliers infrequently, so if a typical firm changes a provider such as its bank roughly once every five years, only about a fifth are likely to be in the market over a year and roughly 2% in any given month.

That has a practical consequence. Lead generation has two jobs at once: catch the few buyers who are searching today, and make sure the other 95% remember you when their turn comes. Teams that only chase the first job end up fighting over a tiny pool with everyone else.

MQLs, SQLs and why the definitions matter

Not every enquiry is equal, and most of the friction between marketing and sales comes from treating them as if they were. Two labels do most of the work.

Marketing-qualified lead (MQL)

• What it looks like: someone who has engaged with your marketing, for example by signing up on your website or attending one of your events.
• What it needs next: nurturing. Useful content, a relevant follow-up and a reason to talk.

Sales-qualified lead (SQL)

• What it looks like: someone who has shown intent to buy, for example by phoning your sales team or requesting a demo.
• What it needs next: a prompt, informed conversation with a salesperson.

Those examples come from SAP’s explanation of MQLs and SQLs. HubSpot puts the difference down to sales readiness: MQLs need more nurturing, while SQLs meet specific criteria for handoff to sales. It suggests the BANT framework (budget, authority, need and timeline) as one way to set those criteria.

Whatever test you use, write it down and get sales and marketing to agree it. The cost of not doing so shows up in the data. In Marketing Week’s 2025 State of B2B Marketing survey, 37.7% of the 450 brand marketers who responded said they were under pressure to deliver MQLs regardless of quality. That’s how pipelines fill up with contacts who were never going to buy, and how sales teams learn to ignore marketing’s leads altogether.

Building a B2B lead generation strategy

A workable strategy has six parts. Skip one and the rest underperform.

1. Define the ideal customer. Industry, company size, region, the job titles involved in the purchase and the problem that makes them look for a supplier.
2. Set a revenue target and work backwards. Decide how many new customers you need, then how many SQLs that takes, then how many MQLs, using your own close rates rather than someone else’s benchmark.
3. Choose a few channels. Two or three done properly beat seven done thinly.
4. Build the offer and the pages. Every channel lands somewhere. Service pages, sector pages and case studies should speak to the buyer’s problem and make the next step obvious.
5. Agree the handover. Who calls a new lead, how quickly, and what happens to people who aren’t ready yet.
6. Measure to revenue. Track enquiries, qualified opportunities and closed deals by source, not just clicks.

The handover is where good campaigns quietly die. Moneypenny’s State of Lead Management 2025 report, based on a Censuswide survey of senior UK marketing decision makers, found that one in three marketers struggle to get back in touch with leads quickly. You can spend thousands generating an enquiry and lose it because nobody rang back until Thursday.

Inbound channels that attract buyers

Inbound lead generation puts you where buyers already look and lets them come to you. It’s also how you stay visible to the 95% who aren’t buying yet.

Search and content

Business buyers research before they speak to anyone. Search engine optimisation (SEO), expertise-led content and well-built service pages mean you’re found when they search for a supplier, a price or a comparison. B2B marketers are leaning into this. Marketing Week’s survey found 69.9% of B2B marketers say their business is increasingly focused on creating content such as thought leadership and podcasts, and 66.7% of the 450 respondents said their lead generation tactics are changing. Only 25.4% said they’re staying the same.

The content that works in B2B answers the questions a buyer asks before they’d ever fill in a form: what it costs, how long it takes, what can go wrong, how to compare suppliers. Brochure copy about being “passionate” and “innovative” doesn’t get shortlisted.

AI search and answer engines

Part of that research has moved into ChatGPT, Gemini and Google’s AI features, where a buyer might ask for a shortlist of suppliers before visiting a single website. Generative engine optimisation (GEO) and answer engine optimisation (AEO) are the disciplines of becoming a source those tools trust and cite. If the terms are new, our glossary of AEO, GEO and AI SEO terms and our guide to what AI SEO involves are good starting points, and AI SEO versus traditional SEO explains how the two fit together.

Paid search and paid social

Paid media gives you speed that organic search can’t. Google Ads catches people searching with intent today. Meta Ads and TikTok Ads reach decision makers earlier, before they search. For B2B the skill is in the targeting and the conversion path: a narrow audience, a specific offer and a landing page that qualifies visitors rather than collecting any email address it can get. Our guide to where Google Ads budgets leak covers the usual causes of wasted spend.

LinkedIn

LinkedIn suits B2B because you can target by job title, sector and company size. In the same Marketing Week survey, 51.2% of B2B marketers said they invest in LinkedIn ads for short-term returns. Organic posts from named experts build familiarity, and paid campaigns add reach on top. Our piece on getting more from LinkedIn sets out habits that help.

Outbound tactics that start the conversation

Outbound means you contact the prospect first. It works when the target list is tight and the message is relevant to the person’s role. It fails when it’s a scraped list and a template that starts “I hope this email finds you well”.

SortedIQ’s UK guidance on B2B multi-touch cadences suggests 5 to 9 touches across email, phone and direct mail over 3 to 6 weeks, with seven touches over 4 to 5 weeks as a practical default for mid-market deals (£20k to £200k annual contract value). Its suggested sequence runs:

1. First email
2. Second email
3. First phone call
4. LinkedIn message
5. Direct mail piece
6. Second phone call
7. Third email
8. Third phone call

It also suggests adding phone when the average deal justifies £20 to £50 per contact touched, and keeping physical direct mail for deals above £50k a year.

Treat that as a starting model, not a rule. The principle underneath it is the useful part: deal size decides how much effort per prospect makes sense. A £2,000 annual contract doesn’t justify a courier-delivered mailer. A £100,000 one probably does.

Inbound and outbound work better together. Outbound contacts check your website before they reply, so weak pages undermine every email you send. And inbound visitors who showed interest but never enquired are worth a follow-up too. Our guide on re-engaging old leads shows how to get value from contacts you already hold.

How to judge cost per lead and lead quality

People ask what a good B2B cost per lead is, and the honest answer is that no single figure applies. Published benchmarks vary wildly by industry, channel and how loosely “lead” is defined. A software firm selling £50,000 contracts and a distributor selling £3,000 orders can’t share a target.

A more useful method:

1. Work out the gross profit from an average new customer.
2. Decide how much of it you’re willing to spend to win that customer.
3. Divide by your lead-to-customer rate to find the most you can pay per lead.

A worked example (illustrative)

Say a customer is worth £30,000 in gross profit and you’re happy to spend 10% of that, £3,000, to win one. If one in ten SQLs becomes a customer, you can afford up to £300 per SQL. If one in four MQLs becomes an SQL, the ceiling for an MQL is £75. These numbers are made up to show the maths, not a benchmark, but run your own through the same three steps and you’ll have a target that actually means something.

The quality measures that matter more

• Lead-to-opportunity rate: how many leads become real sales conversations.
• Opportunity-to-customer rate: how many of those close.
• Sales cycle length: whether leads move or stall.
• Source mix: which channels produce customers, not just enquiries.
• Response time: how quickly sales contacts a new enquiry.

Volume is rarely the real problem. The Moneypenny survey found 75% of UK marketers generate 100 or more leads a month, and 30% generate 500 or more. What separates teams is what happens to those leads next. Marketing Week also found that 52.1% of B2B marketers say senior leadership fails to understand what marketing can do beyond lead generation. Reporting in revenue terms is the quickest way to change that conversation with a board.

What a B2B lead generation agency does

Agencies and lead generation companies vary a lot, so judge them on the work they’ll actually do. Typical services include:

• Search and AI visibility: technical audits, SEO, content, and GEO or AEO so you show up in search results and AI answers.
• Paid media: Google Ads, Meta Ads, TikTok Ads and, increasingly, ChatGPT Ads.
• Landing pages and web development: pages built to convert, not just to look good.
• Outbound and nurture: target lists, sequences and follow-up.
• Analytics and reporting: attribution from first touch to closed revenue.

Questions to ask any provider

• Who does the work, and is it in-house? Handoffs between suppliers slow campaigns down and blur who’s accountable.
• How do you define a qualified lead? Without a shared definition, volume numbers mean very little.
• What do you report on? Enquiries, opportunities and revenue are more useful than impressions.
• How do you get to grips with our sector? Buyers can tell when copy wasn’t written by someone who understands their problem.
• What’s the contract structure? Know the minimum term and what happens at renewal.

We go into this in more depth in how to choose a lead generation agency in the UK and our guide to what to buy in B2B demand generation.

A simple 90-day starting plan

If you’re starting from a thin pipeline, this order works for most B2B businesses:

• Weeks 1 to 2: define the ideal customer, agree MQL and SQL criteria with sales, and set up tracking from enquiry to revenue.
• Weeks 3 to 6: fix or build the key service pages, then launch one paid channel aimed at high-intent searches or a tightly defined LinkedIn audience.
• Weeks 6 to 10: add a short outbound sequence to a target list, and publish content that answers the questions buyers ask before they buy.
• Weeks 10 to 13: review lead quality by source, cut what doesn’t produce opportunities and move budget to what does.

Organic and AI visibility build more slowly than paid media, so treat them as a compounding investment alongside the faster channels rather than a replacement for them. If you want to see where automation fits into this, our guide to AI lead generation covers the tools worth using.

Our perspective

Most B2B businesses we speak to don’t have a lead problem. They have a visibility and follow-through problem. The services are good, but buyers can’t find them at the moment of research, and the enquiries that do arrive aren’t tracked to revenue, so nobody knows which channel is working.

That’s why we combine traditional SEO with GEO and AEO, so a business shows up in Google and in AI-generated answers from tools like ChatGPT and Gemini. Buyers use both now, and while many competitors haven’t started on AI search, there’s a real first-mover advantage for the ones that do.

We also think one in-house team beats a chain of suppliers. Search, paid media, web development and analytics are connected, so a change to a landing page, an ad and a report can happen in one conversation instead of three. And we build our reporting around actual enquiries and revenue, because those are the numbers a managing director cares about.

If you’re weighing up where to invest first, start with the buyer: where do your best customers look, what do they ask, and what do they find when they get there? Build from that.

Working with Castle on lead generation

We’ve been helping businesses win more enquiries since 2014, for B2B and direct-to-consumer clients across lead generation and ecommerce. Our team combines AI-driven SEO, GEO and AEO with Google Ads management, Meta Ads, TikTok Ads, ChatGPT Ads and web development, with reporting tied to enquiries and revenue. See how we structure campaigns on our lead generation agency page, browse all our services, or read our earlier take on how B2B businesses grow sales with lead generation.

Tell us who your best customers are and what a good month looks like, and we’ll show you where the next qualified enquiry is most likely to come from.

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FAQ

What is B2B lead generation?

It’s the process of identifying businesses that could buy your product or service and bringing them into a sales conversation. It covers inbound activity such as SEO, content and ads, and outbound activity such as email, phone and LinkedIn outreach.

What’s the difference between an MQL and an SQL?

A marketing-qualified lead has engaged with your marketing, for example by signing up on your website or attending an event. A sales-qualified lead has shown intent to buy, such as requesting a demo or calling sales, and meets criteria your sales team has agreed.

What is a good cost per lead for B2B?

There’s no universal number because it depends on deal value and close rate. Work backwards from the gross profit of an average customer, the share you’re willing to spend to win one, and your lead-to-customer rate to find the most you can sensibly pay per lead.

How do I generate more B2B leads?

Make sure the right buyers can find you in search and AI answers, then add one or two focused channels such as Google Ads or LinkedIn. Agree with sales what a qualified lead is, respond quickly, and measure results to revenue rather than volume.

What should I look for in a B2B lead generation agency?

Look for a team that covers search, paid media and web under one roof, defines lead quality clearly and reports on enquiries and revenue. Our guide to choosing a lead generation agency sets out the criteria in more detail.

Sources

• Salesforce UK: What is B2B marketing?
• SAP: What is B2B lead generation?
• HubSpot: MQL vs SQL
• Marketing Week: The 95:5 rule is the new 60:40 rule (Weinberg and Lombardo, B2B Institute)
• Marketing Week: Over half of B2B brands fail to understand marketing’s potential (November 2025)
• Marketing Week: Two thirds of B2B marketers say lead gen tactics are changing
• Moneypenny: The State of Lead Management in 2025
• SortedIQ: B2B multi-touch cadence (UK)

Recommended

• B2B Demand Generation Services: What to Buy and How to Judge
• How to Choose a Lead Generation Agency in the UK
• AI Lead Generation: How UK Businesses Can Use It Well