Company lists · Data refreshed September 2026

Top 25 Business accounting outsourcing companies based in the United Kingdom

Name: Business accounting 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 Sep 27, 2026 4,017 companies tracked

RevenueBase identified 4,017 company matches for business accounting outsourcing companies associated with the United Kingdom as of September 2026 and tracks 23,202 professional contacts across them, including 6,096 with verified work emails. London is the largest hub.

This list covers company matches for business accounting outsourcing 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 27, 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 27, 2026 How this list was built

4,017Companies

23,202Contacts tracked

6,096Verified emails

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The 25 largest business accounting outsourcing companies based in the United Kingdom

Ranked by team size

Top 25 of 4,017 company matches for business accounting outsourcing companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Taxassist Accountants	Exact match	Norwich, United KingdomHQ recorded Sep 27, 2026	201-500	708 contacts →
	Exact match “At TaxAssist Accountants we specialise in providing accountancy services, tax returns, payroll, bookkeeping, tax savings and tax advice to small businesses and support over…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2	Outbooks	Exact match	Harrow, United KingdomHQ recorded Sep 27, 2026	201-500	477 contacts →
	Exact match “Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3	Corient Business Solutions Limited	Exact match	Coventry, United KingdomHQ recorded Sep 27, 2026	501-1,000	423 contacts →
	Exact match “Corient is a specialist outsourced accounting and bookkeeping partner, built exclusively for UK accountancy practices.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4	Gravita	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	379 contacts →
	Exact match “Welcome to the new era of accountancy.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5	SKS Business Services	Exact match	London, United KingdomHQ recorded Sep 27, 2026	501-1,000	322 contacts →
	Exact match “At SKS, we pride ourselves on being different.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6	GI Outsourcing	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	311 contacts →
	Exact match “GI Outsourcing is a UK-based accountants outsourcing firm.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7	Looking For NEW Opportunities	Exact match	Stapleford, United KingdomHQ recorded Sep 27, 2026	n/a	296 contacts →
	Exact match “Accounting services for sole traders and SME’s.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8	Finance & Accounting For Business	Exact match	Rushden, United KingdomHQ recorded Sep 27, 2026	n/a	166 contacts →
	Exact match “For your business to succeed.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9	Burgess Hodgson	Exact match	Canterbury, United KingdomHQ recorded Sep 27, 2026	51-200	140 contacts →
	Exact match “Burgess Hodgson are a Kent based accountancy firm with the skills and expertise to rival any other accountancy firm in the UK.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10	HSJ Accountants, Business & TAX Advisors	Exact match	Newport, United KingdomHQ recorded Sep 27, 2026	51-200	134 contacts →
	Exact match “Award winning accountants & tax advisors based in Newport, South Wales.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11	Accounts And Legal	Exact match	London, United KingdomHQ recorded Sep 27, 2026	11-50	133 contacts →
	Exact match “Traditional accountants do a great job of the numbers, but that's often as far as the service goes.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12	Initor Global UK	Exact match	London, United KingdomHQ recorded Sep 27, 2026	51-200	108 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 27, 2026 · View company records in RevenueBase
13	Debitam	Exact match	42-44 Bishopsgate, United KingdomHQ recorded Sep 27, 2026	51-200	104 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 27, 2026 · View company records in RevenueBase
14	SJD Accountancy	Exact match	Hemel Hempstead, United KingdomHQ recorded Sep 27, 2026	501-1,000	102 contacts →
	Exact match “SJD is now Caroola Accountancy!” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15	Paperchase Business Services LTD	Exact match	London, United KingdomHQ recorded Sep 27, 2026	501-1,000	100 contacts →
	Exact match “Paperchase Business Services Ltd (PBSL) is a firm of accountants, taxation and business advisors based in South London.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16	Rayner Essex LLP	Exact match	St Albans, United KingdomHQ recorded Sep 27, 2026	51-200	98 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 27, 2026 · View company records in RevenueBase
17	Affinity Outsourcing Limited	Exact match	Wembley, United KingdomHQ recorded Sep 27, 2026	51-200	96 contacts →
	Exact match “Affinity Outsourcing is an accountancy outsourcing company that specialises in outsourcing for Accounting Practices.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18	Sapphire Info Solutions P LTD	Exact match	London, United KingdomHQ recorded Sep 27, 2026	51-200	88 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 27, 2026 · View company records in RevenueBase
19	Base Practice Support LTD Baseline Practice Support Smc-Pvt LTD	Exact match	London, United KingdomHQ recorded Sep 27, 2026	51-200	78 contacts →
	Exact match “Base Practice Support Ltd is the UK's fastest-growing Accountancy Practice Support company.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20	Affinity Associates Limited	Exact match	Wembley, United KingdomHQ recorded Sep 27, 2026	201-500	64 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 27, 2026 · View company records in RevenueBase
21	Oasis Accountants Limited	Exact match	Chiswick Park, United KingdomHQ recorded Sep 27, 2026	11-50	63 contacts →
	Exact match “At Oasis Accountants we make sure to keep your business profitable.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22	Arna Accounting PVT LTD	Exact match	London, United KingdomHQ recorded Sep 27, 2026	51-200	63 contacts →
	Exact match “ARNA Accounting Pvt Limited is expert in FinTech.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23	The Accountancy Partnership	Exact match	Wirral, United KingdomHQ recorded Sep 27, 2026	51-200	62 contacts →
	Exact match “We offer online accounting services which simplify tax and finances for small businesses, by providing a fresh alternative to old-school high street accountants.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24	Greybeard Automation & Outsourcing	Exact match	Brighouse, United KingdomHQ recorded Sep 27, 2026	11-50	62 contacts →
	Exact match “Greybeard Solutions provides expert accounting outsourcing and business process automation services to SMEs worldwide.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25	Morris Crocker Chartered Accountants	Exact match	Portsmouth, United KingdomHQ recorded Sep 27, 2026	51-200	60 contacts →
	Exact match “If you’re looking for clear, practical financial advice tailored to your needs, you’re in the right place.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “business accounting outsourcing companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 4,017 business accounting outsourcing companies based in the United Kingdom

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Business accounting outsourcing companies based in the United Kingdom at a glance

As of Sep 27, 2026

26.3%Verified-email coverage

5.8Average contacts per company

1-10Median size (employees)

17.8%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

3,250

11-50

617

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 4,017 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 “business accounting outsourcing 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 6,096 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 27, 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.

Business accounting outsourcing companies 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 “business accounting outsourcing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 4,017 company matches for business accounting outsourcing 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?

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

Which city has the most business accounting outsourcing companies?

London leads with 715 company records, followed by Manchester (81) and Birmingham (55).

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 6,096 professional contacts with verified work emails tracked across these 4,017 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 27, 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.