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 online accounting firms headquartered in 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 online accounting firms 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

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 online accounting firms 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 online accounting firms: 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	Taxassist Accountants	Indirect evidence	Norwich, United KingdomHQ checked Sep 21, 2026	201-500	708 contacts →
	Indirect evidence “At TaxAssist Accountants we specialise in providing accountancy services, tax returns, payroll, bookkeeping, tax savings and tax advice to small businesses and support over…” Source: RevenueBase Database · checked Sep 21, 2026
2	Outbooks	Partial evidence	Harrow, United KingdomHQ checked Sep 21, 2026	201-500	477 contacts →
	Partial evidence “Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Source: RevenueBase Database · checked Sep 21, 2026
3	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
4	Looking For NEW Opportunities	Partial evidence	Stapleford, United KingdomHQ checked Sep 21, 2026	n/a	296 contacts →
	Partial evidence “Accounting services for sole traders and SME’s.” Source: RevenueBase Database · checked Sep 21, 2026
5	Mercer & Hole	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	284 contacts →
	Indirect evidence “A forward-thinking accountancy firm with our clients’ vision at the centre of everything we do.” Source: RevenueBase Database · checked Sep 21, 2026
6	Aims Accountants For Business	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	236 contacts →
	Indirect evidence “AIMS Accountants for Business is the largest network of independent qualified accountants throughout the UK.” Source: RevenueBase Database · checked Sep 21, 2026
7	Galloways Accounting	Partial evidence	Brighton, United KingdomHQ checked Sep 21, 2026	201-500	187 contacts →
	Partial evidence “Galloways is the fastest growing accounting services firm in Sussex.” Source: RevenueBase Database · checked Sep 21, 2026
8	Milsted Langdon LLP	Indirect evidence	Bristol, United KingdomHQ checked Sep 21, 2026	51-200	168 contacts →
	Indirect evidence “Milsted Langdon is an independent firm of chartered accountants in Bath, Bristol, London, Taunton and Yeovil.” Source: RevenueBase Database · checked Sep 21, 2026
9	EQ Accountants, Part Of The Sumer Group	Indirect evidence	Dundee, United KingdomHQ checked Sep 21, 2026	201-500	167 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 21, 2026
10	Ormerod Rutter Chartered Accountants	Indirect evidence	Droitwich, United KingdomHQ checked Sep 21, 2026	51-200	151 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 21, 2026
11	Burgess Hodgson	Indirect evidence	Canterbury, United KingdomHQ checked Sep 21, 2026	51-200	140 contacts →
	Indirect evidence “Burgess Hodgson are a Kent based accountancy firm with the skills and expertise to rival any other accountancy firm in the UK.” Source: RevenueBase Database · checked Sep 21, 2026
12	Hurst Accountants	Indirect evidence	Stockport, United KingdomHQ checked Sep 21, 2026	51-200	136 contacts →
	Indirect evidence “Just imagine.” Source: RevenueBase Database · checked Sep 21, 2026
13	FLB Accountants LLP	Partial evidence	Wokingham, United KingdomHQ checked Sep 21, 2026	51-200	107 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
14	Debitam	Strong evidence	42-44 Bishopsgate, United KingdomHQ checked Sep 21, 2026	51-200	104 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
15	SJD Accountancy	Indirect evidence	Hemel Hempstead, United KingdomHQ checked Sep 21, 2026	501-1,000	102 contacts →
	Indirect evidence “SJD is now Caroola Accountancy!” Source: RevenueBase Database · checked Sep 21, 2026
16	Paperchase Business Services LTD	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	100 contacts →
	Indirect evidence “Paperchase Business Services Ltd (PBSL) is a firm of accountants, taxation and business advisors based in South London.” Source: RevenueBase Database · checked Sep 21, 2026
17	Cottons Group	Indirect evidence	Rugby, United KingdomHQ checked Sep 21, 2026	51-200	99 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
18	Rayner Essex LLP	Indirect evidence	St Albans, United KingdomHQ checked Sep 21, 2026	51-200	98 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
19	Affinity Outsourcing Limited	Partial evidence	Wembley, United KingdomHQ checked Sep 21, 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 Sep 21, 2026
20	More Than Accountants	Indirect evidence	Bolton, United KingdomHQ checked Sep 21, 2026	51-200	93 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
21	Aston Shaw	Indirect evidence	Norwich, United KingdomHQ checked Sep 21, 2026	51-200	88 contacts →
	Indirect evidence “We are one of East Anglia’s leading chartered certified accountants with presence in Norwich, Cambridge, Dereham, Great Yarmouth, Ipswich and King’s Lynn.” Source: RevenueBase Database · checked Sep 21, 2026
22	SMH Group	Indirect evidence	Sheffield, United KingdomHQ checked Sep 21, 2026	51-200	86 contacts →
	Indirect evidence “Since 1995 Sutton McGrath Hartley has been providing professional accountancy services from our offices in Sheffield and Chesterfield.” Source: RevenueBase Database · checked Sep 21, 2026
23	Shah & CO Chartered Certified Accountants	Indirect evidence	Coventry, United KingdomHQ checked Sep 21, 2026	11-50	84 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 21, 2026
24	UHY Ross Brooke, Chartered Accountants	Indirect evidence	Newbury, United KingdomHQ checked Sep 21, 2026	51-200	77 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
25	Price & Company	Indirect evidence	Eastbourne, United KingdomHQ checked Sep 21, 2026	11-50	72 contacts →
	Indirect evidence “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.” 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: online accounting firms. 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 online accounting firms.
Partial evidence: Its own public description names part of online accounting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name online accounting firms. 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 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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among online accounting firms, 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 “online accounting firms”. 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 online accounting firms), 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 online accounting firms, 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, 9,933 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.

Online accounting firms by metro

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 online accounting firms, 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 online accounting firms are there based in the United Kingdom?

RevenueBase identified 5,349 online accounting firms 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?

Taxassist Accountants, headquartered in Norwich, tops this list with the largest team on record.

Which city has the most online accounting firms?

London leads with 992 headquartered companies, 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 the top results, verified emails and direct dials included. Upgrading unlocks all 9,933 verified decision-maker contacts tracked across these 5,349 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.