Company lists · Data refreshed September 2026

Top 25 Financial outsourcing firms based in the United Kingdom

RevenueBase identified 785 company matches for financial outsourcing firms associated with the United Kingdom as of September 2026 and tracks 4,231 professional contacts across them, including 1,225 with verified work emails. London is the largest hub.

This list covers company matches for financial outsourcing 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 28, 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 28, 2026 How this list was built
785Companies
4,231Contacts tracked
1,225Verified emails
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The 25 largest financial outsourcing firms based in the United Kingdom

Ranked by team size
Top 25 of 785 company matches for financial outsourcing firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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 28, 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 28, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 28, 2026501-1,000322 contacts →

Exact match

“At SKS, we pride ourselves on being different.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 28, 2026201-500311 contacts →

Exact match

“GI Outsourcing is a UK-based accountants outsourcing firm.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchRushden, United KingdomHQ recorded Sep 28, 2026n/a166 contacts →

Exact match

“For your business to succeed.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchEgham, United KingdomHQ recorded Sep 28, 202651-20067 contacts →

Exact match

“Isosceles Finance Helping ambitious businesses grow Isosceles is a business services company supporting rapidly growing and investor-backed companies with fractional CFO services…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-20063 contacts →

Exact match

“ARNA Accounting Pvt Limited is expert in FinTech.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchCambridge, United KingdomHQ recorded Sep 28, 202651-20044 contacts →

Exact match

“We offer a CFO-led virtual finance team.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-20041 contacts →

Exact match

“Welcome to Factotum-your secret weapon for streamlined business success!”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
10Exact matchBromsgrove, United KingdomHQ recorded Sep 28, 202611-5032 contacts →

Exact match

“Almost every business can save time and money with smart outsourcing from Go-To - how much depends on you.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchGlasgow City, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
12Exact matchManchester, United KingdomHQ recorded Sep 28, 202651-20029 contacts →

Exact match

“Finex Accounting is an outsourcing accountancy service provider.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5024 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchBirmingham, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5022 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchBury, United KingdomHQ recorded Sep 28, 202611-5020 contacts →

Exact match

“Our firm has been in business for more than a century, combining deep local roots and a great tradition of customer care with a forward-thinking approach to business.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchCroydon, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
18Exact matchLeeds, United KingdomHQ recorded Sep 28, 202611-5018 contacts →

Exact match

“We are a firm of experienced finance professionals who provide strategic, financial and operational solutions to your business on a flexible basis.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchLeeds, United KingdomHQ recorded Sep 28, 20261-1017 contacts →

Exact match

“We combine the perfect mix of industry-leading technology and personnel to support you in managing your workforce with greater efficiency than ever before.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchWaterlooville, United KingdomHQ recorded Sep 28, 202611-5017 contacts →

Exact match

“Flamingo Contracting Limited (FCL) operates as a business support function, offering payroll outsourcing and sub-contracting solutions to companies wishing to focus their valuable…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 28, 20261-1016 contacts →

Exact match

“We help the best F&B, hospitality, FMCG & events businesses with Finance, Strategy & Accounting.* Outsourced finance teams * Bookkeeping, payroll & management reporting * Cash…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
24Exact matchMiddlesex, United KingdomHQ recorded Sep 28, 20261-1015 contacts →

Exact match

“Azuki Accounts is a specialist finance partner for recruitment agencies.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchWest Wickham, United KingdomHQ recorded Sep 28, 202611-5015 contacts →

Exact match

“When you engage us to act as your outsourced finance team, we not only provide financial and business support, but in conjunction with our wider community of legal experts and tax…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 785 financial outsourcing firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,225 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Financial outsourcing firms based in the United Kingdom at a glance

As of Sep 28, 2026
29.0%Verified-email coverage
5.4Average contacts per company
1-10Median size (employees)
21.3%Largest-city concentration · London
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
602
11-50
144
51-200
23
201-500
8
501-1,000
2
1,001-5,000
1

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 785 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 “financial outsourcing 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 1,225 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 28, 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.

Financial outsourcing firms 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 “financial outsourcing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 785 company matches for financial outsourcing 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 financial outsourcing firms?

London leads with 167 company records, followed by Birmingham (15) and Manchester (15).

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 1,225 professional contacts with verified work emails tracked across these 785 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 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 785 financial outsourcing 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.