Company lists · Data refreshed September 2026

Top 25 Tax advisory services based in Ireland

Name: Tax advisory services based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 138 companies tracked

RevenueBase identified 138 tax advisory services headquartered in Ireland as of September 2026 and tracks 819 professional contacts across them, including 392 with verified work emails. Dublin is the largest hub.

This list covers tax advisory services headquartered in Ireland, 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

138Companies

819Contacts tracked

392Verified emails

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The 25 largest tax advisory services based in Ireland

Ranked by team size

Top 25 of 138 tax advisory services based in Ireland, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to tax advisory services: 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	Strata Financial	Partial evidence	Dublin 2, IrelandHQ checked Sep 22, 2026	51-200	74 contacts →
	Partial evidence “Strata Financial provides a full suite of all accounting, auditing, tax, management, and compliance services.” Source: RevenueBase Database · checked Sep 22, 2026
2	UHY Farrelly Dawe White Limited	Strong evidence	Dundalk, IrelandHQ checked Sep 22, 2026	51-200	68 contacts →
	Strong evidence “UHY FDW is a leading audit, tax and advisory practice in Ireland, driven to achieve a better future together, for our people, our clients and our communities.” Source: RevenueBase Database · checked Sep 22, 2026
3	Malone & CO	Indirect evidence	Dublin, IrelandHQ checked Sep 22, 2026	51-200	40 contacts →
	Indirect evidence “At Malone & Co, we go beyond the numbers.” Source: RevenueBase Database · checked Sep 22, 2026
4	BCA TAX & Business Consultants	Partial evidence	Tullamore, IrelandHQ checked Sep 22, 2026	11-50	25 contacts →
	Partial evidence “BCA provide a full range of proactive financial, taxation, business advisory, audit, company secretarial and commercial services to our broad range of clients.” Source: RevenueBase Database · checked Sep 22, 2026
5	Woods & Partners Limited	Indirect evidence	Kells, IrelandHQ checked Sep 22, 2026	11-50	24 contacts →
	Indirect evidence “At Woods and Partners, our experience is reflected in the services we offer.” Source: RevenueBase Database · checked Sep 22, 2026
6	HDS	Partial evidence	Limerick, IrelandHQ checked Sep 22, 2026	11-50	23 contacts →
	Partial evidence “HDS, founded in 2004, is an established practice of professional advisors with offices at RiverPoint, one of Limerick’s most recognisable and prestigious landmark buildings.” Source: RevenueBase Database · checked Sep 22, 2026
7	Merry Mullen	Partial evidence	Dublin, IrelandHQ checked Sep 22, 2026	11-50	22 contacts →
	Partial evidence “Medium Practice of the Year - Irish Accountancy Awards 2025 Merry Mullen are a full-service Firm of Chartered Accountant and Chartered Tax Advisers (CTA) based in Dublin 2.” Source: RevenueBase Database · checked Sep 22, 2026
8	Purcell Mcquillan TAX Partners	Strong evidence	Dublin 4, IrelandHQ checked Sep 22, 2026	11-50	20 contacts →
	Strong evidence “Purcell McQuillan Tax Partners is a leading Irish tax advisory firm, established in Dublin in 2001.” Source: RevenueBase Database · checked Sep 22, 2026
9	Nexus Chartered Accounts & TAX Advisors	Indirect evidence	Blackrock, IrelandHQ checked Sep 22, 2026	11-50	20 contacts →
	Indirect evidence “Our high standards, efficiency and understanding of compliance, ensure true piece of mind.” Source: RevenueBase Database · checked Sep 22, 2026
10	Stephens Cooke & Associates	Indirect evidence	Mullingar, IrelandHQ checked Sep 22, 2026	11-50	15 contacts →
	Indirect evidence “At Stephens Cooke & Associates we are committed to providing a comprehensive range of services to ensure that we are not simply a service provider, but a firm that work in…” Source: RevenueBase Database · checked Sep 22, 2026
11	Mcmahon Auditors Accountants	Strong evidence	Kildare Town, IrelandHQ checked Sep 22, 2026	11-50	13 contacts →
	Strong evidence “McMahon Auditors Accountants is a well-established firm of accountants, tax advisors, and business consultants, proudly serving clients from our offices in Kildare, Naas, and…” Source: RevenueBase Database · checked Sep 22, 2026
12	Cusack & CO	Partial evidence	Dublin, IrelandHQ checked Sep 22, 2026	11-50	12 contacts →
	Partial evidence “Cusack & Co offers both traditional accounting and tax services as well as value added solutions to local and international companies, individuals, self-employed persons and…” Source: RevenueBase Database · checked Sep 22, 2026
13	Visio Advisory	Indirect evidence	Sutton, IrelandHQ checked Sep 22, 2026	11-50	11 contacts →
	Indirect evidence “We focus on building strong relationships with our personal and business clients by getting to know them, their plans and their aspirations.” Source: RevenueBase Database · checked Sep 22, 2026
14	KTA	Partial evidence	Dublin, IrelandHQ checked Sep 22, 2026	11-50	11 contacts →
	Partial evidence “KTA deliver tax advice to private clients and their families on all taxation matters.” Source: RevenueBase Database · checked Sep 22, 2026
15	Greavy And CO Accountants	Partial evidence	Dublin 2, IrelandHQ checked Sep 22, 2026	11-50	10 contacts →
	Partial evidence “Best Accounting, business and tax services.” Source: RevenueBase Database · checked Sep 22, 2026
16	Harney Nolan	Indirect evidence	Carlow, IrelandHQ checked Sep 22, 2026	11-50	10 contacts →
	Indirect evidence “We see our role as being more than that of accountants.” Source: RevenueBase Database · checked Sep 22, 2026
17	GSW Accountants & TAX Advisors	Partial evidence	Blessington, IrelandHQ checked Sep 22, 2026	11-50	10 contacts →
	Partial evidence “We provide a comprehensive range of professional advisory services and set ourselves apart with a motivated, ambitious and friendly team.” Source: RevenueBase Database · checked Sep 22, 2026
18	Warren & Partners, A Xeinadin Company	Strong evidence	Dublin, IrelandHQ checked Sep 22, 2026	11-50	9 contacts →
	Strong evidence “Warren & Partners are a boutique Irish tax and business advisory firm, providing bespoke tax solutions for domestic and international clients operating in Ireland.” Source: RevenueBase Database · checked Sep 22, 2026
19	Milne O'dwyer	Partial evidence	Offaly, IrelandHQ checked Sep 22, 2026	11-50	9 contacts →
	Partial evidence “Certified Public Accountants and Registered Tax Consultants.” Source: RevenueBase Database · checked Sep 22, 2026
20	Millview Advisory	Strong evidence	Swords, IrelandHQ checked Sep 22, 2026	1-10	8 contacts →
	Strong evidence “Millview Advisory is a boutique tax and corporate finance advisory firm based in Dublin, Ireland.” Source: RevenueBase Database · checked Sep 22, 2026
21	Fintech PRO	Strong evidence	Dublin, IrelandHQ checked Sep 22, 2026	1-10	8 contacts →
	Strong evidence “Qualified Accountants, Business Advisors, and Management Consultants enabling Businesses Grow by helping them with Accounting and Tax compliance needs.” Source: RevenueBase Database · checked Sep 22, 2026
22	Mcavoy & Associates	Indirect evidence	Cork, IrelandHQ checked Sep 22, 2026	1-10	7 contacts →
	Indirect evidence “McAvoy & Associates is a multi-faceted consulting firm which provides its clients with leading-edge expertise in the fields of taxation, business advice, accounting and financial…” Source: RevenueBase Database · checked Sep 22, 2026
23	John O'callaghan LTD	Indirect evidence	Dundalk, IrelandHQ checked Sep 22, 2026	1-10	7 contacts →
	Indirect evidence “Since our establishment in 1983 we have always believed that our priority is making your business operate as efficiently as possible both from an operational and taxation…” Source: RevenueBase Database · checked Sep 22, 2026
24	Lane O' Connor Accountants & TAX Consultants	Partial evidence	Clonmel, IrelandHQ checked Sep 22, 2026	1-10	7 contacts →
	Partial evidence “At Lane O’ Connor Accountants & Tax Consultants, we guarantee high quality service and dedicated customer care at costs you can afford.” Source: RevenueBase Database · checked Sep 22, 2026
25	Fortis Advisory	Partial evidence	Dublin, IrelandHQ checked Sep 22, 2026	1-10	6 contacts →
	Partial evidence “At Fortis Advisory we work closely with start-up, SME and corporate clients to provide accounting, taxation and advisory services on an ongoing basis.” 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 advisory services. 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 advisory services.
Partial evidence: Its own public description names part of tax advisory services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name tax advisory services. 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 138 tax advisory services based in Ireland

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Tax advisory services based in Ireland at a glance

As of Sep 22, 2026

47.9%Verified-email coverage

5.9Average contacts per company

1-10Median size (employees)

17.4%Largest-city concentration · Dublin

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

Email recency for this list is measured worldwide rather than for Ireland, so it is reported there. Company counts and contact totals on this page are exact for Ireland, over 138 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 advisory services, 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 Ireland whose own description of what they do matches “tax advisory services”. 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 advisory services), 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 advisory services, and records with no verified work email. Companies headquartered outside Ireland 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, 392 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.

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 advisory services, 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 advisory services are there based in Ireland?

RevenueBase identified 138 tax advisory services headquartered in Ireland 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?

Strata Financial, headquartered in Dublin, tops this list with the largest team on record.

Which city has the most tax advisory services?

Dublin leads with 24 headquartered companies, followed by Limerick (6) and Cork (5).

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 392 verified decision-maker contacts tracked across these 138 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.