Company lists · Data refreshed October 2026

Top 25 Bookkeeping outsourcing companies based in the United Kingdom

Name: Bookkeeping outsourcing companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 1,232 companies tracked

RevenueBase identified 1,232 bookkeeping outsourcing companies headquartered in the United Kingdom as of October 2026 and tracks 5,015 professional contacts across them, including 1,215 with verified work emails. London is the largest hub.

This list covers bookkeeping outsourcing companies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed October 1, 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 Oct 1, 2026 86% judged on-target in blind review

1,232Companies

5,015Contacts tracked

1,215Verified emails

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The 25 largest bookkeeping outsourcing companies based in the United Kingdom

Ranked by team size

Top 25 of 1,232 bookkeeping outsourcing companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Oct 1, 2026. RevenueBase Smart Search rates how each company's information relates to bookkeeping outsourcing 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	Outbooks	Strong evidence	Harrow, United KingdomHQ checked Oct 1, 2026	201-500	477 contacts →
	Strong evidence “Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Source: RevenueBase Database · checked Oct 1, 2026
2	Corient Business Solutions Limited	Partial evidence	Coventry, United KingdomHQ checked Oct 1, 2026	501-1,000	423 contacts →
	Partial evidence “Corient is a specialist outsourced accounting and bookkeeping partner, built exclusively for UK accountancy practices.” Source: RevenueBase Database · checked Oct 1, 2026
3	Initor Global UK	Indirect evidence	London, United KingdomHQ checked Oct 1, 2026	51-200	108 contacts →
	Indirect evidence “As attention turns to the new fiscal year, accountants across the UK are finalising plans to boost growth and productivity and improve profitability.” Source: RevenueBase Database · checked Oct 1, 2026
4	Affinity Outsourcing Limited	Partial evidence	Wembley, United KingdomHQ checked Oct 1, 2026	51-200	96 contacts →
	Partial evidence “Affinity Outsourcing is an accountancy outsourcing company that specialises in outsourcing for Accounting Practices.” Source: RevenueBase Database · checked Oct 1, 2026
5	Sapphire Info Solutions P LTD	Partial evidence	London, United KingdomHQ checked Oct 1, 2026	51-200	88 contacts →
	Partial evidence “Sapphire is an accounting outsourcing company set up for accounting firms in UK and is based in India.” Source: RevenueBase Database · checked Oct 1, 2026
6	Stellaripe	Indirect evidence	London, United KingdomHQ checked Oct 1, 2026	51-200	58 contacts →
	Indirect evidence “We are on a mission to help accountants to grow their accountancy practice and become more profitable.” Source: RevenueBase Database · checked Oct 1, 2026
7	DSL Accounting	Indirect evidence	Leamington Spa, United KingdomHQ checked Oct 1, 2026	n/a	54 contacts →
	Indirect evidence “DSL is one of the UK's leading small business accountancy firms, helping businesses grow since 1997.” Source: RevenueBase Database · checked Oct 1, 2026
8	Artifin Accountants	Indirect evidence	London, United KingdomHQ checked Oct 1, 2026	11-50	53 contacts →
	Indirect evidence “At Artifin Accountants we strive to provide a more open experience of accounting services for business owners.” Source: RevenueBase Database · checked Oct 1, 2026
9	Complete Accounting Solutions	Partial evidence	London, United KingdomHQ checked Oct 1, 2026	11-50	33 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Oct 1, 2026
10	Accounts ETC	Indirect evidence	Cirencester, United KingdomHQ checked Oct 1, 2026	1-10	30 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Oct 1, 2026
11	Bookcheck LTD	Indirect evidence	London, United KingdomHQ checked Oct 1, 2026	51-200	29 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Oct 1, 2026
12	accountables.com	Indirect evidence	Glasgow City, United KingdomHQ checked Oct 1, 2026	11-50	29 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Oct 1, 2026
13	Finex Accounting	Partial evidence	Manchester, United KingdomHQ checked Oct 1, 2026	51-200	29 contacts →
	Partial evidence “Finex Accounting is an outsourcing accountancy service provider.” Source: RevenueBase Database · checked Oct 1, 2026
14	Propact Solutions	Strong evidence	Birmingham, United KingdomHQ checked Oct 1, 2026	11-50	22 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Oct 1, 2026
15	Accnet Solutions LTD	Partial evidence	London, United KingdomHQ checked Oct 1, 2026	11-50	21 contacts →
	Partial evidence “AccNet Solutions was formed in November 2010 by Damitha Ukuwela as a firm providing accounting and bookkeeping solutions.” Source: RevenueBase Database · checked Oct 1, 2026
16	PSF Accounting	Indirect evidence	Cambridge, United KingdomHQ checked Oct 1, 2026	1-10	21 contacts →
	Indirect evidence “We are a small accountancy firm with offices in Cambridge and Stamford.” Source: RevenueBase Database · checked Oct 1, 2026
17	Doshi Outsourcing	Indirect evidence	Croydon, United KingdomHQ checked Oct 1, 2026	201-500	20 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Oct 1, 2026
18	Virgate Your Dynamic Accounts Team	Partial evidence	Gloucester, United KingdomHQ checked Oct 1, 2026	11-50	19 contacts →
	Partial evidence “Outsourcing accounts is no longer just for big business.” Source: RevenueBase Database · checked Oct 1, 2026
19	Cogs Accountancy Services	Indirect evidence	Windsor, United KingdomHQ checked Oct 1, 2026	11-50	18 contacts →
	Indirect evidence “For each and every client we create an individually tailored accountancy package.” Source: RevenueBase Database · checked Oct 1, 2026
20	Ookkee	Indirect evidence	Poole, United KingdomHQ checked Oct 1, 2026	1-10	18 contacts →
	Indirect evidence “At Ookkee we are aiming to get business owners back in touch with the numbers.” Source: RevenueBase Database · checked Oct 1, 2026
21	Northern Tonic	Partial evidence	York, United KingdomHQ checked Oct 1, 2026	11-50	16 contacts →
	Partial evidence “Our ethos is to provide the accounting and bookkeeping that your company needs using the best technology available.” Source: RevenueBase Database · checked Oct 1, 2026
22	Numero Accounts Services LTD	Indirect evidence	Stockport, United KingdomHQ checked Oct 1, 2026	11-50	16 contacts →
	Indirect evidence “Numero is an outsourced accounts business specialising in the legal sector and experts in compliance and customer service.” Source: RevenueBase Database · checked Oct 1, 2026
23	Excelsious	Strong evidence	London, United KingdomHQ checked Oct 1, 2026	11-50	16 contacts →
	Strong evidence “Excelsious provides accounting, bookkeeping and finance function outsourcing services to accountancy firms and small to medium enterprises.” Source: RevenueBase Database · checked Oct 1, 2026
24	Asesa Solutions LTD	Partial evidence	London, United KingdomHQ checked Oct 1, 2026	11-50	16 contacts →
	Partial evidence “With over 20+ years of experience, ASESA Solutions Ltd offers world-class financial services, including comprehensive accounts management, precise bookkeeping, strategic HR…” Source: RevenueBase Database · checked Oct 1, 2026
25	Hour Hands LTD	Partial evidence	Harpenden, United KingdomHQ checked Oct 1, 2026	1-10	15 contacts →
	Partial evidence “Bookkeeping, business support and PA services.” Source: RevenueBase Database · checked Oct 1, 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: bookkeeping outsourcing 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 bookkeeping outsourcing companies.
Partial evidence: Its own public description names part of bookkeeping outsourcing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name bookkeeping outsourcing 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 1,232 bookkeeping outsourcing companies based in the United Kingdom

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Bookkeeping outsourcing companies based in the United Kingdom at a glance

As of Oct 1, 2026

24.2%Verified-email coverage

4.1Average contacts per company

1-10Median size (employees)

16.6%Largest-city concentration · London

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

1,053

11-50

132

51-200

201-500

501-1,000

1,001-5,000

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 1,232 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 bookkeeping outsourcing 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 the United Kingdom whose own description of what they do matches “bookkeeping outsourcing 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 bookkeeping outsourcing 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 bookkeeping outsourcing companies, and records with no verified work email. Companies headquartered outside United Kingdom 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, 1,215 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 October 1, 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.

Bookkeeping outsourcing companies by metro

Bookkeeping outsourcing companies in London204

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its 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 the category the list is about. Each row is rated strong evidence when the company's own description names bookkeeping outsourcing companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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

RevenueBase identified 1,232 bookkeeping outsourcing companies headquartered in the United Kingdom as of October 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Outbooks, headquartered in London, tops this list with the largest team on record.

Which city has the most bookkeeping outsourcing companies?

London leads with 204 headquartered companies, followed by Manchester (22) and Bristol (20).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,215 verified decision-maker contacts tracked across these 1,232 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 1, 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 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.