Company lists · Data refreshed September 2026

Top 25 Accounting support companies based in the United Kingdom

RevenueBase identified 3,025 company matches for accounting support companies associated with the United Kingdom as of September 2026 and tracks 16,216 professional contacts across them, including 3,523 with verified work emails. London is the largest hub.

This list covers company matches for accounting support companies 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 21, 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 21, 2026 How this list was built
3,025Companies
16,216Contacts tracked
3,523Verified emails
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The 25 largest accounting support companies based in the United Kingdom

Ranked by team size
Top 25 of 3,025 company matches for accounting support companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHarrow, United KingdomHQ recorded Sep 21, 2026201-500477 contacts →

Exact match

“Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchStapleford, United KingdomHQ recorded Sep 21, 2026n/a296 contacts →

Exact match

“Accounting services for sole traders and SME’s.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchBrighton, United KingdomHQ recorded Sep 21, 2026201-500187 contacts →

Exact match

“Galloways is the fastest growing accounting services firm in Sussex.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchRushden, United KingdomHQ recorded Sep 21, 2026n/a166 contacts →

Exact match

“For your business to succeed.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchCarlisle, United KingdomHQ recorded Sep 21, 202651-200123 contacts →

Exact match

“David Allen was established in 1997 and now has a team of over 150 dedicated professionals working from our offices based in Carlisle, Dalston, Dumfries, Penrith and Workington.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact match42-44 Bishopsgate, United KingdomHQ recorded Sep 21, 202651-200104 contacts →

Exact match

“Online Accounting Service | Bookkeeping | Payroll | Personal Tax Return Filing to HMRC | Corporation Tax Filing | HMRC ONLINE FILING: Our aim is to help small business owners` tax…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchHemel Hempstead, United KingdomHQ recorded Sep 21, 2026501-1,000102 contacts →

Exact match

“SJD is now Caroola Accountancy!”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchSt Albans, United KingdomHQ recorded Sep 21, 202651-20098 contacts →

Exact match

“At Rayner Essex, we believe your accountant should do a lot more than just report on how your business is doing - he or she should help you identify opportunities to improve your…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchWembley, United KingdomHQ recorded Sep 21, 202651-20096 contacts →

Exact match

“Affinity Outsourcing is an accountancy outsourcing company that specialises in outsourcing for Accounting Practices.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20088 contacts →

Exact match

“Sapphire is an accounting outsourcing company set up for accounting firms in UK and is based in India.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20078 contacts →

Exact match

“Base Practice Support Ltd is the UK's fastest-growing Accountancy Practice Support company.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchWembley, United KingdomHQ recorded Sep 21, 2026201-50064 contacts →

Exact match

“Affinity Associates Limited is a leading accounting firm based in Wembley, London, UK, and is regulated and authorised for public practice by both the ICAEW (Institute of…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchLivingston, United KingdomHQ recorded Sep 21, 202651-20058 contacts →

Exact match

“Legal Cashiering Services Payroll Services Management Accounting Statutory Accounts Credit Control Consultancy Projects The Cashroom understands that you just want to get on with…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20058 contacts →

Exact match

“We are on a mission to help accountants to grow their accountancy practice and become more profitable.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchPlus X Innovation, United KingdomHQ recorded Sep 21, 202651-20056 contacts →

Exact match

“Acenteus Accounting, legally known as Acenteus CCA Global Ltd is a UK-registered outsourced accounting and finance partner delivering secure, cloud-enabled support for…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchLeamington Spa, United KingdomHQ recorded Sep 21, 2026n/a54 contacts →

Exact match

“DSL is one of the UK's leading small business accountancy firms, helping businesses grow since 1997.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5053 contacts →

Exact match

“At Artifin Accountants we strive to provide a more open experience of accounting services for business owners.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5051 contacts →

Exact match

“Empowering Businesses to Thrive Through Financial Clarity | Adroit Accountax We're a team of passionate and experienced accountants dedicated to your business success.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchCorby, United KingdomHQ recorded Sep 21, 202651-20047 contacts →

Exact match

“At Moore, our purpose is to help people thrive – our clients, our people and the communities they live and work in.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5044 contacts →

Exact match

“In business we grow, we develop, and we change, ensure you are working with an accountancy firm that will see and understand your brand and your goals.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20042 contacts →

Exact match

“Diacron Group provides accounting, tax and corporate services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5042 contacts →

Exact match

“At PSB Accountants, we put your goals and aspirations first.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchStevenage, United KingdomHQ recorded Sep 21, 202651-20041 contacts →

Exact match

“Moore Northern Home Counties offers a wide range of accountancy, tax and advisory services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 21, 2026201-50040 contacts →

Exact match

“Accounting.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5039 contacts →

Exact match

“Glazers is a well-established and progressive firm of accountants based in North West London.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 3,025 accounting support companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 3,523 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Accounting support companies based in the United Kingdom at a glance

As of Sep 21, 2026
21.7%Verified-email coverage
5.4Average contacts per company
1-10Median size (employees)
17.4%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
2,517
11-50
402
51-200
49
201-500
15
501-1,000
3
1,001-5,000
4

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 3,025 companies.

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 support companies” 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 3,523 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 21, 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.

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 support companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many accounting support companies are there based in the United Kingdom?

RevenueBase identified 3,025 company matches for accounting support companies 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?

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

Which city has the most accounting support companies?

London leads with 526 company records, followed by Manchester (49) and Bristol (38).

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 3,523 professional contacts with verified work emails tracked across these 3,025 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 21, 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.