Company lists · Data refreshed September 2026

Top 25 Accounting companies based in London, United Kingdom

Name: Accounting companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 7, 2026 1,863 companies tracked

This directory lists 1,863 accounting companies based in London, United Kingdom, with 38,348 business contacts and 15,335 email addresses available as of September 2026. Across the United Kingdom, London is the largest hub for this category.

Accounting companies provide services such as bookkeeping, financial reporting, tax preparation, auditing, payroll support, and financial advisory work for businesses and other organizations. This list covers companies that provide accounting, bookkeeping, tax, audit, payroll, or related financial reporting services to business clients. Ranked by team size, largest first. Data current as of September 7, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 7, 2026 86% judged on-target in blind review

1,863Companies

38,348Contacts tracked

15,335Verified emails

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The 25 largest accounting companies based in London, United Kingdom

Ranked by team size

Top 25 of 1,863 accounting companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 7, 2026. RevenueBase Smart Search rates how each company's information relates to accounting companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	BDO UK	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	5,001-10,000	6,933 contacts →
	Indirect evidence “BDO LLP is an accountancy and business advisory firm that provides Audit, Tax, Deals, and Consulting, Risk & Outsourcing (CR & O) services to entrepreneurial, growing and…” Source: RevenueBase Database · checked Sep 7, 2026
2	Moore Global	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	5,001-10,000	2,047 contacts →
	Indirect evidence “At Moore, our purpose is to help people thrive – our clients, our people and the communities they live and work in.” Source: RevenueBase Database · checked Sep 7, 2026
3	S&w	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	1,001-5,000	1,930 contacts →
	Strong evidence “As a fast growing UK accounting and advisory firm, we’ve been there, as a trusted partner, helping businesses and individuals meet challenges and seize opportunities across…” Source: RevenueBase Database · checked Sep 7, 2026
4	Crowe UK	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	1,001-5,000	1,395 contacts →
	Indirect evidence “Crowe UK is a leading audit, tax, advisory and consulting firm with a national presence to complement our international reach.” Source: RevenueBase Database · checked Sep 7, 2026
5	Xeinadin	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	1,001-5,000	1,001 contacts →
	Indirect evidence “We are a leading provider of accountancy services and business advice for small and medium-sized enterprises and individuals across the UK and Ireland.” Source: RevenueBase Database · checked Sep 7, 2026
6	PKF Global	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	10001+	725 contacts →
	Indirect evidence “PKF is a global family of legally independent professional services firms bound together by a shared commitment to quality, integrity and the creation of clarity in a complex…” Source: RevenueBase Database · checked Sep 7, 2026
7	PKF Littlejohn	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	501-1,000	702 contacts →
	Indirect evidence “We are a fast-growing firm of accountants and business advisers based in London’s Canary Wharf, Leeds and in Manchester.” Source: RevenueBase Database · checked Sep 7, 2026
8	NEXIA	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	10001+	685 contacts →
	Strong evidence “Nexia is a leading worldwide network of independent accounting and consulting firms.” Source: RevenueBase Database · checked Sep 7, 2026
9	Haysmac	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	501-1,000	655 contacts →
	Indirect evidence “HaysMac is an award‑winning accountancy, tax and advisory firm, known for delivering expert, partner‑led advice to ambitious organisations and individuals.” Source: RevenueBase Database · checked Sep 7, 2026
10	Kreston Reeves	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	501-1,000	602 contacts →
	Indirect evidence “We guide our clients, colleagues and communities to a brighter future.” Source: RevenueBase Database · checked Sep 7, 2026
11	UHY Hacker Young	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	501-1,000	577 contacts →
	Indirect evidence “The UHY Hacker Young Group is an award winning Group of UK chartered accountants with offices spanning England, Wales and Northern Ireland.” Source: RevenueBase Database · checked Sep 7, 2026
12	Buzzacott	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	501-1,000	575 contacts →
	Indirect evidence “Buzzacott is an accountancy and advisory firm with a long-standing history of supporting individuals, businesses, and not-for-profits.” Source: RevenueBase Database · checked Sep 7, 2026
13	Kreston Global	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	10001+	512 contacts →
	Strong evidence “Kreston is a global network of innovative, like-minded accounting firms that puts trusted relationships and exceptional care at the heart of everything it does.” Source: RevenueBase Database · checked Sep 7, 2026
14	Mazars In The UK	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	1,001-5,000	505 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 7, 2026
15	BKL	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	501-1,000	410 contacts →
	Indirect evidence “BKL are a Top 40 firm of accountants and tax advisers with over 400 people, and offices in North London and Central London.” Source: RevenueBase Database · checked Sep 7, 2026
16	Gravita	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	201-500	379 contacts →
	Indirect evidence “Welcome to the new era of accountancy.” Source: RevenueBase Database · checked Sep 7, 2026
17	HW Fisher, Part Of The Sumer Group	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	201-500	345 contacts →
	Indirect evidence “HW Fisher is part of the Sumer Group, a top 12 accountancy practice.” Source: RevenueBase Database · checked Sep 7, 2026
18	SKS Business Services	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	501-1,000	322 contacts →
	Indirect evidence “At SKS, we pride ourselves on being different.” Source: RevenueBase Database · checked Sep 7, 2026
19	GI Outsourcing	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	201-500	311 contacts →
	Indirect evidence “GI Outsourcing is a UK-based accountants outsourcing firm.” Source: RevenueBase Database · checked Sep 7, 2026
20	HLB International	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	10001+	291 contacts →
	Strong evidence “We are a global network of independent advisory and accounting firms with a history of innovation and collaboration, dedicated to helping our clients grow across borders.” Source: RevenueBase Database · checked Sep 7, 2026
21	Mercer & Hole	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	201-500	284 contacts →
	Indirect evidence “A forward-thinking accountancy firm with our clients’ vision at the centre of everything we do.” Source: RevenueBase Database · checked Sep 7, 2026
22	DFK International	Strong evidence	London, United KingdomHQ checked Sep 7, 2026	n/a	276 contacts →
	Strong evidence “We are a global alliance of accounting firms providing audit, tax and advisory services, working closely together across over 430 offices in over 85 countries.” Source: RevenueBase Database · checked Sep 7, 2026
23	Russell Bedford International	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	1,001-5,000	271 contacts →
	Indirect evidence “Established in 1983, Russell Bedford is a global network of independent firms of accountants, auditors, tax advisers and business consultants.” Source: RevenueBase Database · checked Sep 7, 2026
24	Gerald Edelman	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	51-200	256 contacts →
	Indirect evidence “At Gerald Edelman, we help business leaders succeed.” Source: RevenueBase Database · checked Sep 7, 2026
25	Aims Accountants For Business	Indirect evidence	London, United KingdomHQ checked Sep 7, 2026	201-500	236 contacts →
	Indirect evidence “AIMS Accountants for Business is the largest network of independent qualified accountants throughout the UK.” Source: RevenueBase Database · checked Sep 7, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: accounting companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names accounting companies.
Partial evidence: Its own public description names part of accounting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accounting companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,863 accounting companies based in London, United Kingdom

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Accounting companies based in London, United Kingdom at a glance

As of Sep 7, 2026

40.0%Verified-email coverage

20.6Average contacts per company

1-10Median size (employees)

Sep 7, 2026Page data refreshed

Companies by employee count

1-10

1,235

11-50

448

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 1,863 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among accounting companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in London, United Kingdom whose own description of what they do matches “accounting companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names accounting companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among accounting companies, and records with no verified work email. Companies headquartered outside London are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 15,335 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 7, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Accounting companies by metro in the United Kingdom

Frequently asked

How many accounting companies are in the directory?

The directory contains 1,863 accounting companies based in London, United Kingdom as of September 2026.

How can I find contacts at accounting companies?

The directory includes 38,348 business contacts and 15,335 email addresses associated with the listed accounting companies.

Which city in the United Kingdom has the most accounting companies?

London leads the United Kingdom with 1,863 headquartered companies, followed by Manchester (198) and Birmingham (160).

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.