Company lists · Data refreshed September 2026

Top 25 Outsourcing bookkeeping firms based in the United Kingdom

RevenueBase identified 1,252 company matches for outsourcing bookkeeping firms associated with the United Kingdom as of September 2026 and tracks 4,604 professional contacts across them, including 1,183 with verified work emails. London is the largest hub.

This list covers company matches for outsourcing bookkeeping firms 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
1,252Companies
4,604Contacts tracked
1,183Verified emails
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The 25 largest outsourcing bookkeeping firms based in the United Kingdom

Ranked by team size
Top 25 of 1,252 company matches for outsourcing bookkeeping firms 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 matchLondon, United KingdomHQ recorded Sep 21, 202651-200108 contacts →

Exact match

“As attention turns to the new fiscal year, accountants across the UK are finalising plans to boost growth and productivity and improve profitability.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact 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
4Exact 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
5Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20063 contacts →

Exact match

“ARNA Accounting Pvt Limited is expert in FinTech.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact 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
7Exact 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
8Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20035 contacts →

Exact match

“Accounting for Startups.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5033 contacts →

Exact match

“Complete Accounting Solutions is a firm of dedicated individuals focussed on providing small and growing companies with support on the accounts and bookkeeping activities of their…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchCirencester, United KingdomHQ recorded Sep 21, 20261-1030 contacts →

Exact match

“We found that there was often a breakdown in service between your bookkeeper and your accountant and that more often than not the accountant was spending a majority of their time…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20029 contacts →

Exact match

“Our clients rely on us to remove book-keeping hassle and improve their profitability by using our top quality financial reports based on professionally reconciled book-keeping.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchGlasgow City, United KingdomHQ recorded Sep 21, 202611-5029 contacts →

Exact match

“At Accountables, we manage the finance function for growing businesses across the US and UK, helping founders and CEOs make informed decisions with real-time financial insights.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchManchester, United KingdomHQ recorded Sep 21, 202651-20029 contacts →

Exact match

“Finex Accounting is an outsourcing accountancy service provider.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchBirmingham, United KingdomHQ recorded Sep 21, 202611-5022 contacts →

Exact match

“If you run an accountancy or bookkeeping firm, we can help you overcome your staff recruitment and retention challenges with our outsourcing and offshoring solutions that are…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5022 contacts →

Exact match

“Simplified Online Accounting | Customized Bookkeeping | Expert Payroll Services Making Finances Easier: Welcome to AffoTax.com, where we're changing how small businesses handle…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5021 contacts →

Exact match

“AccNet Solutions was formed in November 2010 by Damitha Ukuwela as a firm providing accounting and bookkeeping solutions.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchCambridge, United KingdomHQ recorded Sep 21, 20261-1021 contacts →

Exact match

“We are a small accountancy firm with offices in Cambridge and Stamford.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchCroydon, United KingdomHQ recorded Sep 21, 2026201-50020 contacts →

Exact match

“In 1995 the Doshi family set up Doshi & Co in London as an accountancy practice for UK clients and simply offshored their very own back office in Gujarat, India in - a location…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchGloucester, United KingdomHQ recorded Sep 21, 202611-5019 contacts →

Exact match

“Outsourcing accounts is no longer just for big business.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchPoole, United KingdomHQ recorded Sep 21, 20261-1018 contacts →

Exact match

“At Ookkee we are aiming to get business owners back in touch with the numbers.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchYork, United KingdomHQ recorded Sep 21, 202611-5016 contacts →

Exact match

“Our ethos is to provide the accounting and bookkeeping that your company needs using the best technology available.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5016 contacts →

Exact match

“Excelsious provides accounting, bookkeeping and finance function outsourcing services to accountancy firms and small to medium enterprises.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5016 contacts →

Exact match

“With over 20+ years of experience, ASESA Solutions Ltd offers world-class financial services, including comprehensive accounts management, precise bookkeeping, strategic HR…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchWembley, United KingdomHQ recorded Sep 21, 202611-5015 contacts →

Exact match

“Easy Accountants provides outsourced accounting and tax support to UK accounting firms and businesses looking to improve efficiency, reduce costs, and scale operations without…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchCrawley, United KingdomHQ recorded Sep 21, 202651-20015 contacts →

Exact match

“The Financial Management Centre is a leading financial management consultancy that is committed to helping organisations achieve performance excellence.”

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

Showing 25 of 1,252 outsourcing bookkeeping firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,183 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Outsourcing bookkeeping firms based in the United Kingdom at a glance

As of Sep 21, 2026
25.7%Verified-email coverage
3.7Average contacts per company
1-10Median size (employees)
16.8%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
1,078
11-50
127
51-200
26
201-500
8
501-1,000
1
1,001-5,000
2

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 1,252 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 “outsourcing bookkeeping firms” 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 1,183 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 “outsourcing bookkeeping firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many outsourcing bookkeeping firms are there based in the United Kingdom?

RevenueBase identified 1,252 company matches for outsourcing bookkeeping firms 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 outsourcing bookkeeping firms?

London leads with 210 company records, followed by Manchester (24) and Bristol (18).

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 1,183 professional contacts with verified work emails tracked across these 1,252 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.

Ready to reach these companies? Verified emails and direct dials for all 1,252 outsourcing bookkeeping firms based in the United Kingdom. Start with a free account, no credit card.

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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.