Company lists · Data refreshed September 2026

Top 25 Accounting and outsourcing services based in the United Kingdom

Name: Accounting and outsourcing services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 7,654 companies tracked

RevenueBase identified 7,654 company matches for accounting and outsourcing services associated with the United Kingdom as of September 2026 and tracks 73,556 professional contacts across them, including 30,687 with verified work emails and 3,103 with mobile numbers. London is the largest hub.

This list covers company matches for accounting and outsourcing services associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 22, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 22, 2026 How this list was built

7,654Companies

73,556Contacts tracked

30,687Verified emails

3,103Mobile numbers

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The 25 largest accounting and outsourcing services based in the United Kingdom

Ranked by team size

Top 25 of 7,654 company matches for accounting and outsourcing services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	BDO UK	Exact match	London, United KingdomHQ recorded Sep 22, 2026	5,001-10,000	6,933 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2	S&w	Exact match	London, United KingdomHQ recorded Sep 22, 2026	1,001-5,000	1,930 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3	Saffery	Exact match	London, United KingdomHQ recorded Sep 22, 2026	1,001-5,000	1,230 contacts →
	Exact match “A partner-led and people-focused top 20 accountancy firm.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4	AAB	Exact match	Uk And Ireland, United KingdomHQ recorded Sep 22, 2026	1,001-5,000	1,125 contacts →
	Exact match “We provide services that help businesses at every stage of the lifecycle.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5	Xeinadin	Exact match	London, United KingdomHQ recorded Sep 22, 2026	1,001-5,000	1,001 contacts →
	Exact match “We are a leading provider of accountancy services and business advice for small and medium-sized enterprises and individuals across the UK and Ireland.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6	PKF Littlejohn	Exact match	London, United KingdomHQ recorded Sep 22, 2026	501-1,000	702 contacts →
	Exact match “We are a fast-growing firm of accountants and business advisers based in London’s Canary Wharf, Leeds and in Manchester.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7	Pkf-Francis Clark Chartered Accountants & Business Advisers	Exact match	Exeter, United KingdomHQ recorded Sep 22, 2026	501-1,000	700 contacts →
	Exact match “Any good accountancy firm can help with your finance, audit, and tax.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8	Haysmac	Exact match	London, United KingdomHQ recorded Sep 22, 2026	501-1,000	655 contacts →
	Exact match “HaysMac is an award‑winning accountancy, tax and advisory firm, known for delivering expert, partner‑led advice to ambitious organisations and individuals.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9	Armstrong Watson	Exact match	Carlisle, United KingdomHQ recorded Sep 22, 2026	501-1,000	579 contacts →
	Exact match “Armstrong Watson has been advising and protecting clients across the North of England and Scotland since 1867.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10	Buzzacott	Exact match	London, United KingdomHQ recorded Sep 22, 2026	501-1,000	575 contacts →
	Exact match “Buzzacott is an accountancy and advisory firm with a long-standing history of supporting individuals, businesses, and not-for-profits.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11	Bishop Fleming Chartered Accountants	Exact match	Bristol, United KingdomHQ recorded Sep 22, 2026	201-500	537 contacts →
	Exact match “Bishop Fleming is a Top 40 accounting firm in the UK and an award-winning tax practice.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12	Mazars In The UK	Exact match	London, United KingdomHQ recorded Sep 22, 2026	1,001-5,000	505 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13	Price Bailey	Exact match	Bishop's Stortford, United KingdomHQ recorded Sep 22, 2026	201-500	500 contacts →
	Exact match “Price Bailey is a leading firm of chartered accountants and business advisers with offices across East Anglia, London, and a strategic presence overseas, serving local SMEs…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14	Outbooks	Exact match	Harrow, United KingdomHQ recorded Sep 22, 2026	201-500	477 contacts →
	Exact match “Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15	Corient Business Solutions Limited	Exact match	Coventry, United KingdomHQ recorded Sep 22, 2026	501-1,000	423 contacts →
	Exact match “Corient is a specialist outsourced accounting and bookkeeping partner, built exclusively for UK accountancy practices.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16	Bhp, Chartered Accountants	Exact match	Sheffield, United KingdomHQ recorded Sep 22, 2026	201-500	409 contacts →
	Exact match “BHP is one of the largest firms of chartered accountants in Yorkshire, providing high-quality assurance, advisory, corporate finance and tax services.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17	Gravita	Exact match	London, United KingdomHQ recorded Sep 22, 2026	201-500	379 contacts →
	Exact match “Welcome to the new era of accountancy.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18	DJH	Exact match	Stoke On Trent, United KingdomHQ recorded Sep 22, 2026	501-1,000	378 contacts →
	Exact match “DJH is an award-winning, B Corp certified accountancy and business advisory group with offices across the UK and Ireland.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19	Duncan & Toplis	Exact match	Grantham, United KingdomHQ recorded Sep 22, 2026	501-1,000	378 contacts →
	Exact match “Duncan & Toplis is one of the largest accounting and business advisers in the UK.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20	Dains Accountants & Advisers	Exact match	Birmingham, United KingdomHQ recorded Sep 22, 2026	501-1,000	374 contacts →
	Exact match “Your success matters.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21	HW Fisher, Part Of The Sumer Group	Exact match	London, United KingdomHQ recorded Sep 22, 2026	201-500	345 contacts →
	Exact match “HW Fisher is part of the Sumer Group, a top 12 accountancy practice.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22	SKS Business Services	Exact match	London, United KingdomHQ recorded Sep 22, 2026	501-1,000	322 contacts →
	Exact match “At SKS, we pride ourselves on being different.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23	GI Outsourcing	Exact match	London, United KingdomHQ recorded Sep 22, 2026	201-500	311 contacts →
	Exact match “GI Outsourcing is a UK-based accountants outsourcing firm.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24	Looking For NEW Opportunities	Exact match	Stapleford, United KingdomHQ recorded Sep 22, 2026	n/a	296 contacts →
	Exact match “Accounting services for sole traders and SME’s.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25	Gerald Edelman	Exact match	London, United KingdomHQ recorded Sep 22, 2026	51-200	256 contacts →
	Exact match “At Gerald Edelman, we help business leaders succeed.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “accounting and outsourcing services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 7,654 accounting and outsourcing services based in the United Kingdom

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Accounting and outsourcing services based in the United Kingdom at a glance

As of Sep 22, 2026

41.7%Verified-email coverage

4.2%Mobile-number coverage

9.6Average contacts per company

1-10Median size (employees)

19.8%Largest-city concentration · London

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

5,493

11-50

1,700

51-200

278

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 24.0d

23,2490–30

6,87831–60

42361–90

3390–180

104180+

Company record updated

Median 87.0d

00–30

6,26031–60

44,54961–90

17,98590–180

4,762180+

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “accounting and outsourcing services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 30,687 professional contacts with verified work emails across the full matched dataset. 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 22, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Accounting and outsourcing services by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “accounting and outsourcing services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many accounting and outsourcing services are there based in the United Kingdom?

RevenueBase identified 7,654 company matches for accounting and outsourcing services associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

BDO UK tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most accounting and outsourcing services?

London leads with 1518 company records, followed by Manchester (149) and Birmingham (124).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 30,687 professional contacts with verified work emails tracked across these 7,654 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 2026.

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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 SmartSearch, 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.