Company lists · Data refreshed September 2026

Top 25 Finance and accounting outsourcing services based in the United Kingdom

Name: Finance and accounting 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 21, 2026 1,105 companies tracked

RevenueBase identified 1,105 finance and accounting outsourcing services headquartered in the United Kingdom as of September 2026 and tracks 5,326 professional contacts across them, including 1,601 with verified work emails. London is the largest hub.

This list covers finance and accounting outsourcing services 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 September 21, 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 21, 2026 86% judged on-target in blind review

1,105Companies

5,326Contacts tracked

1,601Verified emails

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

Ranked by team size

Top 25 of 1,105 finance and accounting outsourcing services based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to finance and accounting outsourcing services: 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 Sep 21, 2026	201-500	477 contacts →
	Strong evidence “Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Source: RevenueBase Database · checked Sep 21, 2026
2	SKS Business Services	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	322 contacts →
	Indirect evidence “At SKS, we pride ourselves on being different.” Source: RevenueBase Database · checked Sep 21, 2026
3	GI Outsourcing	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	311 contacts →
	Partial evidence “GI Outsourcing is a UK-based accountants outsourcing firm.” Source: RevenueBase Database · checked Sep 21, 2026
4	Finance & Accounting For Business	Indirect evidence	Rushden, United KingdomHQ checked Sep 21, 2026	n/a	166 contacts →
	Indirect evidence “For your business to succeed.” Source: RevenueBase Database · checked Sep 21, 2026
5	Affinity Outsourcing Limited	Strong evidence	Wembley, United KingdomHQ checked Sep 21, 2026	51-200	96 contacts →
	Strong evidence “Affinity Outsourcing is an accountancy outsourcing company that specialises in outsourcing for Accounting Practices.” Source: RevenueBase Database · checked Sep 21, 2026
6	Isosceles Finance	Partial evidence	Egham, United KingdomHQ checked Sep 21, 2026	51-200	67 contacts →
	Partial evidence “Isosceles Finance Helping ambitious businesses grow Isosceles is a business services company supporting rapidly growing and investor-backed companies with fractional CFO services…” Source: RevenueBase Database · checked Sep 21, 2026
7	Arna Accounting PVT LTD	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	63 contacts →
	Partial evidence “ARNA Accounting Pvt Limited is expert in FinTech.” Source: RevenueBase Database · checked Sep 21, 2026
8	Greybeard Automation & Outsourcing	Strong evidence	Brighouse, United KingdomHQ checked Sep 21, 2026	11-50	62 contacts →
	Strong evidence “Greybeard Solutions provides expert accounting outsourcing and business process automation services to SMEs worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
9	Acenteus Accounting	Strong evidence	Plus X Innovation, United KingdomHQ checked Sep 21, 2026	51-200	56 contacts →
	Strong evidence “Acenteus Accounting, legally known as Acenteus CCA Global Ltd is a UK-registered outsourced accounting and finance partner delivering secure, cloud-enabled support for…” Source: RevenueBase Database · checked Sep 21, 2026
10	Green & Purple	Partial evidence	Cambridge, United KingdomHQ checked Sep 21, 2026	51-200	44 contacts →
	Partial evidence “We offer a CFO-led virtual finance team.” Source: RevenueBase Database · checked Sep 21, 2026
11	BEANY	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	32 contacts →
	Indirect evidence “Beany are accountants for ambitious businesses, delivering big firm expertise without the big cost.” Source: RevenueBase Database · checked Sep 21, 2026
12	Verallo	Indirect evidence	Henley-on-thames, United KingdomHQ checked Sep 21, 2026	11-50	31 contacts →
	Indirect evidence “Working with companies and business leaders, Verallo's experienced team quickly analyses each client's needs to deliver highly personalised business services that take a strategic…” Source: RevenueBase Database · checked Sep 21, 2026
13	Accounts ETC	Indirect evidence	Cirencester, United KingdomHQ checked Sep 21, 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 Sep 21, 2026
14	accountables.com	Partial evidence	Glasgow City, United KingdomHQ checked Sep 21, 2026	11-50	29 contacts →
	Partial 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 Sep 21, 2026
15	Finex Accounting	Strong evidence	Manchester, United KingdomHQ checked Sep 21, 2026	51-200	29 contacts →
	Strong evidence “Finex Accounting is an outsourcing accountancy service provider.” Source: RevenueBase Database · checked Sep 21, 2026
16	GLX	Indirect evidence	Norwich, United KingdomHQ checked Sep 21, 2026	11-50	28 contacts →
	Indirect evidence “GLX is an independent firm of chartered accountants based in East Anglia, servicing clients throughout the country.” Source: RevenueBase Database · checked Sep 21, 2026
17	Cura Accounting LTD	Partial evidence	Ramsbottom, United KingdomHQ checked Sep 21, 2026	11-50	27 contacts →
	Partial evidence “Financial experts offering management accounts, bookkeeping, credit control, payroll and project services onsite at your premises or offsite.” Source: RevenueBase Database · checked Sep 21, 2026
18	Oakford Advisors LTD	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	24 contacts →
	Indirect evidence “Oakford Advisors Ltd, a Centralis Group company, is an outsourced business services firm which specialises in providing back-office support to start-up or existing companies…” Source: RevenueBase Database · checked Sep 21, 2026
19	Propact Solutions	Partial evidence	Birmingham, United KingdomHQ checked Sep 21, 2026	11-50	22 contacts →
	Partial 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 Sep 21, 2026
20	Liberate Accountants	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	22 contacts →
	Partial evidence “Liberate brings your business a fully managed, engaged and integrated finance team, without the need for full time employees but with the reliability, loyalty and trust that you…” Source: RevenueBase Database · checked Sep 21, 2026
21	Doshi Outsourcing	Indirect evidence	Croydon, United KingdomHQ checked Sep 21, 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 Sep 21, 2026
22	Abacus Resource Solutions	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	20 contacts →
	Strong evidence “As a leadership team with more than 45 years’ combined experience, our mission is to enable businesses to focus on growth and profitability by offering bespoke Finance, Accounting…” Source: RevenueBase Database · checked Sep 21, 2026
23	Virgate Your Dynamic Accounts Team	Partial evidence	Gloucester, United KingdomHQ checked Sep 21, 2026	11-50	19 contacts →
	Partial evidence “Outsourcing accounts is no longer just for big business.” Source: RevenueBase Database · checked Sep 21, 2026
24	Cogs Accountancy Services	Indirect evidence	Windsor, United KingdomHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “For each and every client we create an individually tailored accountancy package.” Source: RevenueBase Database · checked Sep 21, 2026
25	Ookkee	Indirect evidence	Poole, United KingdomHQ checked Sep 21, 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 Sep 21, 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: finance and accounting outsourcing services. 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 finance and accounting outsourcing services.
Partial evidence: Its own public description names part of finance and accounting outsourcing services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name finance and accounting outsourcing services. 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 1,105 finance and accounting outsourcing services based in the United Kingdom

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Finance and accounting outsourcing services based in the United Kingdom at a glance

As of Sep 21, 2026

30.1%Verified-email coverage

4.8Average contacts per company

1-10Median size (employees)

20.0%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

886

11-50

169

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 1,105 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 finance and accounting outsourcing services, 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 “finance and accounting outsourcing services”. 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 finance and accounting outsourcing services), 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 finance and accounting outsourcing services, 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, 1,601 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 21, 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.

Finance and accounting outsourcing services by metro

Finance and accounting outsourcing services in London221

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 finance and accounting outsourcing services, 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 finance and accounting outsourcing services are there based in the United Kingdom?

RevenueBase identified 1,105 finance and accounting outsourcing services headquartered in the United Kingdom as of September 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 finance and accounting outsourcing services?

London leads with 221 headquartered companies, followed by Bristol (21) and Manchester (18).

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 1,601 verified decision-maker contacts tracked across these 1,105 companies.

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 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.