UK B2B Leads Compared by Cost, Break-Even and PECR

There are four ways to get leads for UK B2B sales:

1. Build the list yourself.
2. Buy leads or contact data.
3. Pay an appointment setting service to book meetings.
4. Hire an outbound team in-house.

Four numbers you already have decide which one pays back: what a deal is worth, your gross margin, how often a meeting closes, and how often a lead turns into a meeting. The test below turns them into the most you can afford to pay per lead and per meeting.

Which leads you may legally use is a separate question. UK law treats a limited company, a sole trader and a phone number on a preference register differently. One list can be fine for email and off limits for a phone call.

Disclosure: my agency sells route 3, appointment setting, so I have a stake in how it compares. The phone rules below come straight from the regulator's guidance and the regulation itself.

What are the four ways to get UK B2B leads?

1. Build your own list. Your team or a researcher pulls companies and decision-makers from data tools, checks them, and then contacts them. You pay in hours and subscriptions.
2. Buy leads. This can be a contact file you load into your own outreach. It can also be pay-per-lead, where a provider passes you people who showed some interest. You pay per record or per lead.
3. Hire an appointment setting service. An outside team builds the list, writes and sends the outreach, handles replies and books meetings into your calendar. You pay a retainer, a fee per meeting, or both.
4. Run outbound in-house. You hire people to do what the service does. You own the sending setup, the data and everything the campaigns teach you.

This guide is for founders and sales leads of established B2B companies selling into the UK, from inside the country or from abroad. It compares the routes on cost, speed and legal risk, and it names no agencies.

The pool is big. The ONS counted 2.73 million businesses registered for VAT and/or PAYE in the UK in March 2025, and 76.7% of them were companies by legal status (ONS business population figures for 2025). The rest includes sole proprietors and partnerships, where the email rules are stricter.

A business count shows how big the pool is. It says nothing about who wants to buy.

For one UK B2B client, my team booked 252 appointments through email and LinkedIn outreach in 3 months. The pool is not the problem. The file is. A stale or padded file wastes its own price. Verify every address before you send and keep the bounce rate under 0.5%.

Which UK lead source is cheapest, fastest, and safest?

No route wins on all three. Here is the trade:

What each route costs, with prices at the time of writing:

Providers quote in units that do not line up: per record, per lead, per meeting, per month. The break-even test further down turns any of those quotes into one number you can judge.

Ask every provider what sits inside the fee. Our monthly fee starts from USD 3,000 (about EUR 2,500) and covers only our work. The client buys tools, domains, mailboxes and data directly, since that stack depends on the target market, the sending volume and the size of the sales team.

Two quotes that look alike can differ by that whole layer. A cheaper retainer usually buys a junior or offshore team. Founders who hire 3 agencies before one fits have usually been promised more than they got. Vetting question 7 below (who exactly will write the messages) is the test.

Speed has a floor that no route escapes. New sending domains and mailboxes need authentication and warm-up before they write to prospects, so a bought file delivered tomorrow will not produce meetings tomorrow. After signature, my team usually needs about 15 days to launch, and replies and booked meetings can arrive within the first 30 days after launch.

A quick rule for each route:

1. If your market is a few hundred named accounts, build the list yourself. Your own team knows those accounts best.
2. If you need thousands of contacts and nobody inside can run outreach, hire a service. This is the route my agency sells, so weigh my view with that in mind. Whether to buy leads or booked meetings from a service is a separate choice, the one behind lead generation or appointment setting.
3. If your outbound already works and you just need more people to write to, buy data, verify it and feed it into your own system.
4. If outbound will be a permanent revenue line and you can manage the people, build in-house.

What do PECR and UK GDPR allow for UK B2B outreach?

Two laws apply. PECR (the Privacy and Electronic Communications Regulations) decides whether you may send the marketing email or make the call. UK GDPR decides whether you may hold and use a named person's details. The ICO says UK GDPR applies once you can identify someone in a business capacity, for example when you hold a business contact's name and number (ICO business-to-business marketing).

The split that matters most is who the subscriber is:

Companies versus sole traders. A limited company is a corporate subscriber (PECR's term for a business, as opposed to an individual), so the PECR consent rule for electronic mail does not cover it. A sole trader, and some partnerships, are treated as individual subscribers, which means specific consent or the soft opt-in.

The soft opt-in covers only existing customers: people who bought something similar from you or discussed buying it, and who got an easy way to opt out at the point of collection and again in each message since.

A bought file may not say which record is which, so check legal status before the first send. Search each business on the Companies House register: a record listed there as a limited company or LLP is a corporate body. If you cannot find it there, or cannot tell, treat the record as an individual.

Email has no TPS. The ICO notes that there is no email or text equivalent of the preference service, because emails to individuals already need consent or the soft opt-in. Your own suppression list is the only register you screen email against, so check every new list against it before anything sends, whoever supplied the list.

Calls. The ICO says B2B calls follow the same rules as calls to individuals. It adds one more condition: a business number missing from both registers is open to a call only if that business has never objected and the call is not selling claims management services. Regulation 21 sets the legal bar underneath that guidance.

These rules get enforced. In April 2024 the ICO fined two companies a total of £340,000: Outsource Strategies Ltd £240,000 and Dr Telemarketing Ltd £100,000, for almost 1.43 million calls to numbers on the Telephone Preference Service register. The same notice says the ICO has issued more than £2.59 million in fines for nuisance calls, texts and emails since April 2023.

Lawful basis. The ICO's legitimate interests guidance covers using that basis for direct marketing and for business-to-business contacts. It points to a practical compliance checklist, and the ICO has updated it under the Data (Use and Access) Act. For outreach, a filled-in legitimate interest assessment for cold email shows what that checklist looks like in practice.

These rules stop at the UK border, so watch out if your list spills into the rest of Europe. When a UK campaign also reaches Austrian, Czech or German buyers, my team reaches them on LinkedIn and keeps cold email on hold until a compliant basis is in place. This is not legal advice.

Are bought B2B leads legitimate in the UK?

They can be. Buying a list is not unlawful in itself. Whether you may use a bought lead depends on four things:

1. Where the data came from.
2. Whether the people in it were told how it would be used. The ICO says business contacts must be told you intend to use their details for direct marketing.
3. Whether objections are honored.
4. Whether each record is a corporate or an individual subscriber. The soft opt-in covers only your own existing customers, so a sole trader on a bought file needs specific consent before you email them.

A list can be lawful to use and still be poor. Lists bought cheap from freelancers tend to come with low open rates and high bounces. That is the cheap list that turns out expensive.

Do not buy when:

1. The seller cannot say where the records came from.
2. There is no collection or last-checked date.
3. The seller has no process for objections and suppression.
4. The same file is sold to anyone, without limit.
5. "GDPR compliant" is the whole answer to a question about lawful basis.
6. You cannot test a sample before you pay.

The wider case for and against buying a list at all comes down to whether you should buy a B2B email list for cold outreach in the first place.

Is it worth paying for leads or should you build them?

Paying is worth it when a lead is worth more to you than it costs, measured in gross profit over your real sales cycle. The test is two lines:

1. Break-even price per meeting = average deal value x gross margin x share of meetings that close.
2. Break-even price per lead = break-even price per meeting x share of leads that become meetings.

Here is a worked example with made-up inputs for a UK service business. The close rate is assumed at 20% and the share of leads that turn into meetings at 1 in 4. Swap in your own numbers.

Same lead, same price, opposite answer. A £300 lead leaves the first business half its profit and loses the second business money. Think about it: a list is only cheap against YOUR numbers.

Every input moves the answer in proportion. Double the deal value and the break-even price doubles. Halve the close rate and it halves too.

Before you trust your own table, fix these:

1. Use your real close rate from last quarter. If it is low today, it will fall further as volume rises, because new meetings come from colder people.
2. Count the full sales cycle. I tell clients that B2B sales cycles often run 6, 9 or 12 months. Deals from early calls may close 4 or more months later. Give outbound at least 3 months before you judge it; most campaigns need about 6 months to be fully tuned. A break-even calculated on month one will tell you to stop something that works.
3. Check volume against your goal. You need the right leads and enough of them, both at once. A small monthly batch of perfect-fit leads, say 50 to 100, is a coin toss: most of those people will be busy, not ready or simply not interested this month, and that is no foundation for a sales plan. Volume evens out luck.

Pay when your deal value clears the table and you know your close rate. Not before. Paying for leads is a waste when the offer has not sold yet. More volume only multiplies a conversion rate that is already too low, and a bad list or a weak sender defeats the best copy. I have seen identical copy get 2% replies at one company and 7.5% at another.

How do you vet a UK lead provider before you buy?

Ask these questions before you sign, and get the answers in writing:

1. How is every address verified, and what bounce rate will you stand behind?
2. Can you flag sole traders and partnerships separately from companies? Without that flag you cannot apply the email rules above.
3. If the data includes phone numbers, when were they last screened against the TPS and CTPS?
4. Which domain do you send from? Cold outreach should never go out from the domain your invoices and contracts use, and a provider should not send from it either.
5. Who reads and answers the replies, and how fast?
6. What do you report each week? Booked, attended and closed meetings should be reported separately.
7. Who exactly will write and send the messages? Ask for names and look the people up.
8. Which comparable UK result can you show, with channel, period and numbers? Then ask to speak to that client.

Judge providers on these answers, not on the forecast from the first call.

Which route should you pick, and what should you check first?

Fix the list, the offer and the follow-up before you buy volume. When a founder says the leads are bad, I check the packaging first. One client called my team "translation experts", because we turn what a company does into an offer buyers actually want. A clearer offer can make the same tactics, at the same volume, start working.

Pick your route by where the business is today:

1. No proven offer yet. Do not buy leads. Pick a single offer and a single audience and commit to that pairing for 12 months, which is long enough for B2B sales cycles to show results. We take on companies that already sell, because building a business from scratch is not what my team does.
2. Proven offer, founder still selling, a few hundred target accounts. Build your own list, starting with companies that look like your best past clients.
3. Proven offer, a sales team with free hours, thousands of target companies. Run outbound at volume, in-house or through a service.
4. Outbound already working. Add data and sending accounts to what already works.

Before you pay anyone, take your last 10 closed UK deals. Note each deal value and how many meetings it took, then run the break-even table with those numbers. Pay well under it. If no route clears that number, the problem is not the leads. Fix the funnel first. Then scale.

Working out which UK route clears your break-even? Book a call with your last ten deal values and your close rate, and we can run the numbers together.