Company lists · Data refreshed September 2026

Top 25 Tax planning companies based in the United Kingdom

Name: Tax planning 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 22, 2026 573 companies tracked

RevenueBase identified 573 tax planning companies headquartered in the United Kingdom as of September 2026 and tracks 5,260 professional contacts across them, including 1,174 with verified work emails. London is the largest hub.

This list covers tax planning companies 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 22, 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 22, 2026 86% judged on-target in blind review

573Companies

5,260Contacts tracked

1,174Verified emails

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The 25 largest tax planning companies based in the United Kingdom

Ranked by team size

Top 25 of 573 tax planning companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to tax planning companies: 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	TAX Consultant	Indirect evidence	Brighton, United KingdomHQ checked Sep 22, 2026	n/a	2,042 contacts →
	Indirect evidence “A traditional general practice, with a twist.” Source: RevenueBase Database · checked Sep 22, 2026
2	EY Private Client Services	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	10001+	177 contacts →
	Partial evidence “Thoughtfully structuring and managing your tax affairs is more important than ever.” Source: RevenueBase Database · checked Sep 22, 2026
3	HSJ Accountants, Business & TAX Advisors	Partial evidence	Newport, United KingdomHQ checked Sep 22, 2026	51-200	134 contacts →
	Partial evidence “Award winning accountants & tax advisors based in Newport, South Wales.” Source: RevenueBase Database · checked Sep 22, 2026
4	AOG	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	101 contacts →
	Partial evidence “Welcome to AOG, your esteemed accounting and tax partner, serving SMEs and high-net-worth individuals in the UK and abroad.” Source: RevenueBase Database · checked Sep 22, 2026
5	The FRY Group	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	85 contacts →
	Strong evidence “We are a team of helpful tax and financial planning experts, here to listen, understand your needs and circumstances and make all aspects of dealing with your finances simple…” Source: RevenueBase Database · checked Sep 22, 2026
6	Ward Williams Chartered Accountants	Partial evidence	Weybridge, United KingdomHQ checked Sep 22, 2026	51-200	59 contacts →
	Partial evidence “TRUSTED EXPERTISE, LASTING RELATIONSHIPS At Ward Williams, we are more than an accountancy and tax advisory firm-we are your strategic partner in financial success.” Source: RevenueBase Database · checked Sep 22, 2026
7	TAX Advisory Partnership	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	51 contacts →
	Partial evidence “The Tax Advisory Partnership is a young and vibrant London-based organisation, which brings together a wealth of wide ranging experience and expertise in all areas of UK and US…” Source: RevenueBase Database · checked Sep 22, 2026
8	Lawrence Grant LLP	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	51 contacts →
	Indirect evidence “We’ve been around for a while now, celebrating our 50th anniversary in 2020.” Source: RevenueBase Database · checked Sep 22, 2026
9	Moore East Midlands	Indirect evidence	Corby, United KingdomHQ checked Sep 22, 2026	51-200	47 contacts →
	Indirect evidence “At Moore, our purpose is to help people thrive – our clients, our people and the communities they live and work in.” Source: RevenueBase Database · checked Sep 22, 2026
10	PK Group	Indirect evidence	Richmond, United KingdomHQ checked Sep 22, 2026	51-200	42 contacts →
	Indirect evidence “We are now part of Affinia and this account is no longer monitored.” Source: RevenueBase Database · checked Sep 22, 2026
11	Moore Northern Home Counties Limited	Partial evidence	Stevenage, United KingdomHQ checked Sep 22, 2026	51-200	41 contacts →
	Partial evidence “Moore Northern Home Counties offers a wide range of accountancy, tax and advisory services.” Source: RevenueBase Database · checked Sep 22, 2026
12	Riverview Portfolio LTD	Partial evidence	Calne, United KingdomHQ checked Sep 22, 2026	11-50	40 contacts →
	Partial evidence “Producing the annual accounts and managing the tax liability is vital for every business, but RiverView Portfolio Ltd offers more than just the number crunching.” Source: RevenueBase Database · checked Sep 22, 2026
13	Sobell Rhodes LLP	Indirect evidence	Elstree, United KingdomHQ checked Sep 22, 2026	11-50	38 contacts →
	Indirect evidence “Why Do You Need a Proactive Accountant?” Source: RevenueBase Database · checked Sep 22, 2026
14	Green & CO Accountants And TAX Advisors	Partial evidence	Cwmbran, United KingdomHQ checked Sep 22, 2026	51-200	34 contacts →
	Partial evidence “We are a proactive firm of Accountants and Tax Advisors with one clear purpose: improving the lives of business owners through practical business and tax solutions.” Source: RevenueBase Database · checked Sep 22, 2026
15	Charterhouse Accountants Limited	Indirect evidence	Harrow, United KingdomHQ checked Sep 22, 2026	11-50	34 contacts →
	Indirect evidence “At Charterhouse, we have proudly served our clients from our Harrow office for over 50 years, and we are not your typical firm of accountants.” Source: RevenueBase Database · checked Sep 22, 2026
16	Botham Accounting	Partial evidence	Nottingham, United KingdomHQ checked Sep 22, 2026	11-50	31 contacts →
	Partial evidence “Botham Accounting are a forward thinking team of accountants that provide strategic accounting and tax advice to ambitious businesses.” Source: RevenueBase Database · checked Sep 22, 2026
17	Thomas & CO International Limited	Partial evidence	Manchester, United KingdomHQ checked Sep 22, 2026	11-50	31 contacts →
	Partial evidence “Thomas & Co International is a multi-award winning accounting and tax advisory firm helping business owners protect their assets, reduce their taxes, and build real, lasting…” Source: RevenueBase Database · checked Sep 22, 2026
18	WTT	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	28 contacts →
	Partial evidence “WTT provides experienced tax advisers, legal experts and finance professionals.” Source: RevenueBase Database · checked Sep 22, 2026
19	Ibiss & CO Limited	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	1-10	26 contacts →
	Partial evidence “not all accountants are tax specialists and not all tax consultants are accountants" At IBISS & CO we appreciate the value of working together as a team.” Source: RevenueBase Database · checked Sep 22, 2026
20	TLPI	Partial evidence	Didcot, United KingdomHQ checked Sep 22, 2026	11-50	23 contacts →
	Partial evidence “TLPI provides expert corporate tax, business, property, and investment consultancy to company directors and business owners across the UK.” Source: RevenueBase Database · checked Sep 22, 2026
21	Lishmans LLP	Indirect evidence	Sheffield, United KingdomHQ checked Sep 22, 2026	11-50	21 contacts →
	Indirect evidence “Our mission is to advise, guide and support our clients to ensure they become as successful as all their hard work should make them.” Source: RevenueBase Database · checked Sep 22, 2026
22	Spencer Gardner Dickins	Partial evidence	Coventry, United KingdomHQ checked Sep 22, 2026	11-50	19 contacts →
	Partial evidence “SGD are a leading firm of accountants and tax advisers offering bespoke tax and accounting advice.” Source: RevenueBase Database · checked Sep 22, 2026
23	Forbes Dawson	Partial evidence	Altrincham, United KingdomHQ checked Sep 22, 2026	11-50	18 contacts →
	Partial evidence “We are a firm of qualified tax advisers, specialising in dealing with the affairs of owner managed businesses, entrepreneurs, and their concerns.” Source: RevenueBase Database · checked Sep 22, 2026
24	K3 Advantage	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	18 contacts →
	Partial evidence “K3 Advantage is a trusted advisor focusing on Transactions, Tax Advisory and Strategy.” Source: RevenueBase Database · checked Sep 22, 2026
25	Churchill TAX Advisers	Partial evidence	Holborn, United KingdomHQ checked Sep 22, 2026	11-50	18 contacts →
	Partial evidence “Churchill Tax Advisers would love to help you understand how our services can save you money with the HMRC.” Source: RevenueBase Database · checked Sep 22, 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: tax planning companies. 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 tax planning companies.
Partial evidence: Its own public description names part of tax planning companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name tax planning companies. 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 573 tax planning companies based in the United Kingdom

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Tax planning companies based in the United Kingdom at a glance

As of Sep 22, 2026

22.3%Verified-email coverage

9.2Average contacts per company

1-10Median size (employees)

24.8%Largest-city concentration · London

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

393

11-50

158

51-200

201-500

501-1,000

10001+

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 573 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 tax planning companies, 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 “tax planning companies”. 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 tax planning companies), 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 tax planning companies, 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, 1,174 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 22, 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.

Tax planning companies by metro

Tax planning companies in London142

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 tax planning companies, 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 tax planning companies are there based in the United Kingdom?

RevenueBase identified 573 tax planning companies 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?

TAX Consultant, headquartered in Brighton, tops this list with the largest team on record.

Which city has the most tax planning companies?

London leads with 142 headquartered companies, followed by Birmingham (12) and Leicester (11).

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 1,174 verified decision-maker contacts tracked across these 573 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 22, 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.