Company lists · Data refreshed September 2026

Top 25 Online accounting firms based in the United Kingdom

Name: Online accounting firms 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 5,349 companies tracked

RevenueBase identified 5,349 company matches for online accounting firms associated with the United Kingdom as of September 2026 and tracks 30,002 professional contacts across them, including 9,933 with verified work emails. London is the largest hub.

This list covers company matches for online accounting 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

5,349Companies

30,002Contacts tracked

9,933Verified emails

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The 25 largest online accounting firms based in the United Kingdom

Ranked by team size

Top 25 of 5,349 company matches for online accounting 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Taxassist Accountants	Exact match	Norwich, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
2	Outbooks	Exact match	Harrow, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
3	SKS Business Services	Exact match	London, United KingdomHQ recorded Sep 21, 2026	501-1,000	322 contacts →
	Exact match “At SKS, we pride ourselves on being different.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Looking For NEW Opportunities	Exact match	Stapleford, United KingdomHQ recorded Sep 21, 2026	n/a	296 contacts →
	Exact match “Accounting services for sole traders and SME’s.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Mercer & Hole	Exact match	London, United KingdomHQ recorded Sep 21, 2026	201-500	284 contacts →
	Exact match “A forward-thinking accountancy firm with our clients’ vision at the centre of everything we do.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Aims Accountants For Business	Exact match	London, United KingdomHQ recorded Sep 21, 2026	201-500	236 contacts →
	Exact match “AIMS Accountants for Business is the largest network of independent qualified accountants throughout the UK.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Galloways Accounting	Exact match	Brighton, United KingdomHQ recorded Sep 21, 2026	201-500	187 contacts →
	Exact match “Galloways is the fastest growing accounting services firm in Sussex.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Milsted Langdon LLP	Exact match	Bristol, United KingdomHQ recorded Sep 21, 2026	51-200	168 contacts →
	Exact match “Milsted Langdon is an independent firm of chartered accountants in Bath, Bristol, London, Taunton and Yeovil.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	EQ Accountants, Part Of The Sumer Group	Exact match	Dundee, United KingdomHQ recorded Sep 21, 2026	201-500	167 contacts →
	Exact match “In 2023, EQ Accountants became part of Sumer – a collaboration of renowned regional accountancy practices with a shared vision to champion local small to medium-sized enterprises.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Ormerod Rutter Chartered Accountants	Exact match	Droitwich, United KingdomHQ recorded Sep 21, 2026	51-200	151 contacts →
	Exact match “For 40 years, Ormerod Rutter have offered the specialist hands-on support that clients need to handle all of their tax, business and financial affairs.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Burgess Hodgson	Exact match	Canterbury, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
12	Hurst Accountants	Exact match	Stockport, United KingdomHQ recorded Sep 21, 2026	51-200	136 contacts →
	Exact match “Just imagine.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	FLB Accountants LLP	Exact match	Wokingham, United KingdomHQ recorded Sep 21, 2026	51-200	107 contacts →
	Exact match “FLB is a firm of accountants providing core accounting services to a range of clients from start-ups, owner-managed businesses and private clients, to large corporates and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Debitam	Exact match	42-44 Bishopsgate, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
15	SJD Accountancy	Exact match	Hemel Hempstead, United KingdomHQ recorded Sep 21, 2026	501-1,000	102 contacts →
	Exact match “SJD is now Caroola Accountancy!” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Paperchase Business Services LTD	Exact match	London, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
17	Cottons Group	Exact match	Rugby, United KingdomHQ recorded Sep 21, 2026	51-200	99 contacts →
	Exact match “Cottons was established in 1983 and has since grown to become one of the leading independent chartered accountancy firms in the UK, with offices in Rugby, Northampton, Daventry…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Rayner Essex LLP	Exact match	St Albans, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
19	Affinity Outsourcing Limited	Exact match	Wembley, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
20	More Than Accountants	Exact match	Bolton, United KingdomHQ recorded Sep 21, 2026	51-200	93 contacts →
	Exact match “More Than Accountants is an industry leader when it comes to cutting edge accountancy services and business growth, we utilise the latest technology to help us achieve both our…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Aston Shaw	Exact match	Norwich, United KingdomHQ recorded Sep 21, 2026	51-200	88 contacts →
	Exact match “We are one of East Anglia’s leading chartered certified accountants with presence in Norwich, Cambridge, Dereham, Great Yarmouth, Ipswich and King’s Lynn.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	SMH Group	Exact match	Sheffield, United KingdomHQ recorded Sep 21, 2026	51-200	86 contacts →
	Exact match “Since 1995 Sutton McGrath Hartley has been providing professional accountancy services from our offices in Sheffield and Chesterfield.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Shah & CO Chartered Certified Accountants	Exact match	Coventry, United KingdomHQ recorded Sep 21, 2026	11-50	84 contacts →
	Exact match “Shah and Co is a firm of accountants based in Coventry offering accounts, taxation and business advisory and support services to a wide range of businesses and individuals.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	UHY Ross Brooke, Chartered Accountants	Exact match	Newbury, United KingdomHQ recorded Sep 21, 2026	51-200	77 contacts →
	Exact match “At UHY Ross Brooke Chartered Accountants, we are driven by our purpose of helping you prosper and this applies across all that we do for our clients, our teams and our wider…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Price & Company	Exact match	Eastbourne, United KingdomHQ recorded Sep 21, 2026	11-50	72 contacts →
	Exact match “Price & Company is a proactive and innovative firm based in Eastbourne providing more than 'the standard service' for accounts, taxation and business advisory and support services.” Recorded in the RevenueBase company graph · Sep 21, 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 “online accounting firms”. 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 5,349 online accounting firms based in the United Kingdom

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Online accounting firms based in the United Kingdom at a glance

As of Sep 21, 2026

33.1%Verified-email coverage

5.6Average contacts per company

1-10Median size (employees)

18.5%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

4,155

11-50

987

51-200

107

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 5,349 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 “online accounting 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 9,933 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.

Online accounting 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 “online accounting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many online accounting firms are there based in the United Kingdom?

RevenueBase identified 5,349 company matches for online accounting 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?

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

Which city has the most online accounting firms?

London leads with 992 company records, followed by Manchester (113) and Birmingham (79).

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 9,933 professional contacts with verified work emails tracked across these 5,349 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.

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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.