UK B2B Lead Generation for Accountants, Finding New Clients Using Companies House

The short answer: a steady source of new clients for a UK accountant is the Companies House register: limited companies in their first year, and companies with a first year-end or an accounts deadline coming up. The register is free to search but gives no emails. Leadistry turns it into leads: an agent finds those companies in your area, each with a website and an email we checked, writes the first email and sends it from your own mailbox. Leadistry covers UK companies only. Plans start at £29 a month, and your first 25 leads are free, once.

Best for: practices that want a steady flow of new limited companies to write to, on top of referrals. If you need every new company as a list, with or without a website, see Leadistry vs NewcoSignal.

Most UK accountancy practices grow through referrals, networking and slow inbound. Those channels work, but they cap out at maybe 1–2 new clients per month for a small practice, and they're inconsistent.

The practices that grow faster than that almost all have one thing in common: they run a weekly outbound cadence based on Companies House data. This post is the playbook.

The two best buying signals for accountants

Out of every public Companies House data point, two carry by far the most predictive power for "needs a new accountant":

Signal 1, Registered in the last 12 months

A company in its first year often has no accountant yet. The founders are busy setting up bank accounts, picking software (Xero, FreeAgent, QuickBooks) and working out VAT, and many are open to a fixed-fee onboarding deal.

The catch is timing. A company registered this month rarely has a website or an email yet, so in its first weeks there is usually nobody to write to. Leadistry's reason for these companies is "Registered in the last 12 months", and each one reaches you once we have found and checked its website and email, which usually takes months.

New limited companies are still the easiest group to win, because most have no accountant to displace yet and the founder is reading their own inbox.

Signal 2, Approaching accounts deadline (next 30–90 days)

A company whose accounts are due in 30–90 days and which has either no accountant in their public records, or has had an accountant change recently, is in *immediate-buying* mode. They have a deadline-driven problem.

This group tends to respond better than a general list, because the filing gives you a dated reason to write, but the volume is lower because most companies of any age already have someone.

See our filing deadlines guide for the full deadline math. And the clearest public hint that a company has recently changed accountant is its registered office moving; registered office changes as a switching signal covers how to read one without assuming too much.

The weekly cadence

Pick one half-day per week and keep it. The cadence:

Monday afternoon (15 min): Pull two prospect lists, (1) UK Ltd companies registered in the last 12 months, in your region, in your target SIC clusters; (2) UK Ltd companies whose accounts are due in the next 30–90 days, in your region.

Tuesday morning (2–3 hrs): Review the lists. De-duplicate against existing clients and against your CRM. Send personalised first-touch emails, see template below. Aim for 30–50 sends.

Wednesday afternoon (30 min): Reply to first-touch responses. Schedule discovery calls.

Thursday afternoon (30 min): Send follow-ups to any first-touches that haven't replied (one polite bump is fine, two is pushing it).

Friday morning (1 hr): Discovery calls.

Rather than take a number from us, run it for a month and count. Your reply rate depends on your offer, your patch and your writing, none of which we can see. What the process gives you is a repeatable weekly list with a dated reason attached to every name, on top of whatever referrals are doing.

The first-touch email template

The single most important rule: reference something specific to *their* business that they will believe you genuinely looked at. The incorporation date, the trading name, the SIC code, the registered office town. Not the generic "I came across [Company Name] and was impressed by your work", every founder ignores that.

A version that converts well:

Subject: Quick question on [Company Name]'s first accounts

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Hi [Director First Name],

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Saw [Company Name] was incorporated in [Month Year], congratulations on getting started.

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Quick question: have you decided on an accountant for the first set of accounts yet? If not, we offer a fixed-fee onboarding for new UK Ltd companies, £[X] all-in for first-year accounts, confirmation statement, and the Xero/FreeAgent setup. No surprises.

>

Happy to send a one-pager if that's useful, or skip the pitch and just answer questions if you have any.

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[Your name] [Your firm]

That's it. No three-paragraph value prop. No company about-us. The point is to invite a reply, not close in the email.

Setup tips

Use a real signature, your name, your firm name, your phone number, your ICAEW/ACCA registration number if applicable. Founders are wary of cold emails from companies they can't verify.

Send from a domain-matched email, if your firm is clarkaccountants.co.uk, send from your.name@clarkaccountants.co.uk, not from a personal Gmail. This is the single biggest factor in deliverability and trust.

Don't BCC bulk, every email goes to one prospect at a time. The 30 minutes per week extra is what makes it work.

Track replies in a spreadsheet, not a CRM yet, a CRM is overkill until you're past 100 conversations a month.

What to charge for new-company onboarding

One common way to price new-company onboarding:

• First-year fixed fee: £750 to £1,500 depending on complexity, all-in (accounts + CS + Xero setup + 2 hours of advisory)
• Year-2 onwards: £85–£150/month retainer
• Add-ons: payroll £25/month per employee, VAT returns £45/quarter

Lead with the first-year fixed fee in the email. The lifetime value comes from year 2 onwards.

What if you're not a generalist?

If you specialise (e.g. e-commerce accounting, contractor accounting, hospitality, dentistry), narrow your SIC cluster to match. The replies will be lower volume but much higher quality. A specialist practice has the advantage that its email can be unmistakably the right firm for that ICP, which is the whole reason a narrow list beats a broad one.

See our SIC code guide for the highest-value clusters by sector.

Bottom line

Companies House gives every UK accountant a free, fresh, weekly feed of high-intent prospects. What turns it into a steady flow of new retainer clients is the discipline to run the same workflow every Tuesday morning. (Or skip the discipline: a Leadistry agent runs the same play every morning. The new matches arrive in the Feed with the first email already drafted, and the follow-ups stop the moment someone replies.)

Selling something other than accountancy? The filing-deadline signals above belong to practices, and the public record carries different ones for other trades. Lead generation for IT support companies is the equivalent playbook for managed IT, and is explicit about which of these signals do not transfer.