Company lists · Data refreshed September 2026

Top 25 Audit firms based in Ireland

Name: Audit firms based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 159 companies tracked

RevenueBase identified 159 audit firms headquartered in Ireland as of September 2026 and tracks 11,476 professional contacts across them, including 4,420 with verified work emails. Dublin is the largest hub.

This list covers audit firms 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 19, 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 19, 2026 86% judged on-target in blind review

159Companies

11,476Contacts tracked

4,420Verified emails

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The 25 largest audit firms based in Ireland

Ranked by team size

Top 25 of 159 audit firms based in Ireland, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to audit 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	Kpmg Ireland	Strong evidence	Dublin 2, IrelandHQ checked Sep 19, 2026	1,001-5,000	2,952 contacts →
	Strong evidence “KPMG is a leading provider of professional services, offering a range of audit, tax and advisory services to a broad range of domestic and international clients across all sectors…” Source: RevenueBase Database · checked Sep 19, 2026
2	Grant Thornton Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 19, 2026	1,001-5,000	2,374 contacts →
	Indirect evidence “In Ireland, Grant Thornton Ireland and Grant Thornton Corporate Finance Limited (and their respective subsidiary/affiliate entities) operate under an alternative practice…” Source: RevenueBase Database · checked Sep 19, 2026
3	Forvis Mazars In Ireland	Strong evidence	Dublin 2, IrelandHQ checked Sep 19, 2026	501-1,000	698 contacts →
	Strong evidence “Forvis Mazars in Ireland is a leading international audit, tax, advisory and consulting firm.” Source: RevenueBase Database · checked Sep 19, 2026
4	BDO Ireland	Strong evidence	Dublin, IrelandHQ checked Sep 19, 2026	201-500	521 contacts →
	Strong evidence “BDO Ireland LLP is an accountancy and business advisory firm that provides Audit, Tax, Deals, and Consulting, Risk & Outsourcing (CR & O) services to entrepreneurial, growing and…” Source: RevenueBase Database · checked Sep 19, 2026
5	DM Financial	Indirect evidence	Limerick, IrelandHQ checked Sep 19, 2026	201-500	178 contacts →
	Indirect evidence “DM is an independent financial services company headquartered in Ireland with offices in Singapore, Netherlands, the UK and the Cayman Islands.” Source: RevenueBase Database · checked Sep 19, 2026
6	Crowleysdfk	Indirect evidence	Dublin 2, IrelandHQ checked Sep 19, 2026	51-200	129 contacts →
	Indirect evidence “At Crowleys DFK we believe in creating value for our clients.” Source: RevenueBase Database · checked Sep 19, 2026
7	Eisneramper Ireland	Indirect evidence	Dublin 18, IrelandHQ checked Sep 19, 2026	51-200	119 contacts →
	Indirect evidence “One brand.” Source: RevenueBase Database · checked Sep 19, 2026
8	OSK	Indirect evidence	Dublin, IrelandHQ checked Sep 19, 2026	11-50	78 contacts →
	Indirect evidence “OSK have been providing quality and professional business advice to Irish businesses since 1985.” Source: RevenueBase Database · checked Sep 19, 2026
9	Baker Tilly Ireland	Indirect evidence	Cork, IrelandHQ checked Sep 19, 2026	51-200	74 contacts →
	Indirect evidence “At Baker Tilly, we care about you and the impact you make.” Source: RevenueBase Database · checked Sep 19, 2026
10	Cronin & Company	Indirect evidence	Terenure, IrelandHQ checked Sep 19, 2026	11-50	74 contacts →
	Indirect evidence “Cronin & Company was established in 1978 by Michael Cronin.” Source: RevenueBase Database · checked Sep 19, 2026
11	Strata Financial	Indirect evidence	Dublin 2, IrelandHQ checked Sep 19, 2026	51-200	74 contacts →
	Indirect evidence “Strata Financial provides a full suite of all accounting, auditing, tax, management, and compliance services.” Source: RevenueBase Database · checked Sep 19, 2026
12	UHY Farrelly Dawe White Limited	Strong evidence	Dundalk, IrelandHQ checked Sep 19, 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 19, 2026
13	S&w Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 19, 2026	51-200	66 contacts →
	Indirect evidence “With an Irish heritage dating back to 1958, we’ve built a legacy in expertise, simplicity and an unrelenting commitment to client success.” Source: RevenueBase Database · checked Sep 19, 2026
14	CSG	Indirect evidence	Tralee, IrelandHQ checked Sep 19, 2026	11-50	60 contacts →
	Indirect evidence “Welcome to CSG, a leading accountancy firm in Ireland providing professional services to businesses of all sizes.” Source: RevenueBase Database · checked Sep 19, 2026
15	O'neill Foley	Indirect evidence	Kilkenny, IrelandHQ checked Sep 19, 2026	51-200	48 contacts →
	Indirect evidence “O’Neill Foley is the largest independent firm of Chartered Accountants in the South East of Ireland and we’ve been helping businesses grow since 1958.” Source: RevenueBase Database · checked Sep 19, 2026
16	Walsh O'brien Harnett	Strong evidence	Dublin 2, IrelandHQ checked Sep 19, 2026	11-50	45 contacts →
	Strong evidence “Based in Dublin, Walsh O’Brien Harnett is one of Ireland’s top 20 professional advisory firms offering a wide range of accounting, audit, tax, advisory and corporate services.” Source: RevenueBase Database · checked Sep 19, 2026
17	Noone Casey	Indirect evidence	Dublin 2, IrelandHQ checked Sep 19, 2026	11-50	42 contacts →
	Indirect evidence “Noone Casey is a Dublin based Accountancy & Advisory firm.” Source: RevenueBase Database · checked Sep 19, 2026
18	Gilroy Gannon Chartered Accountants	Indirect evidence	Sligo, IrelandHQ checked Sep 19, 2026	51-200	41 contacts →
	Indirect evidence “Gilroy Gannon brings to its clients a unique partnership - people drawn together from the major international accounting firms, industry and small practice with the common goal of…” Source: RevenueBase Database · checked Sep 19, 2026
19	Irish Auditing & Accounting Supervisory Authority Iaasa	Indirect evidence	Naas, IrelandHQ checked Sep 19, 2026	11-50	27 contacts →
	Indirect evidence “IAASA is responsible for the supervision of the accounting profession in Ireland, comprising over members of Prescribed Accountancy Bodies in business and practice in Ireland.” Source: RevenueBase Database · checked Sep 19, 2026
20	Leonard & Company	Indirect evidence	Rathfarnham, IrelandHQ checked Sep 19, 2026	1-10	26 contacts →
	Indirect evidence “Leonard & Company of Rathfarnham, Dundrum, South Dublin, is a multidisciplinary professional services accountancy practice that is committed to providing a comprehensive range of…” Source: RevenueBase Database · checked Sep 19, 2026
21	BCA TAX & Business Consultants	Strong evidence	Tullamore, IrelandHQ checked Sep 19, 2026	11-50	25 contacts →
	Strong 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 19, 2026
22	Woods & Partners Limited	Indirect evidence	Kells, IrelandHQ checked Sep 19, 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 19, 2026
23	HDS	Indirect evidence	Limerick, IrelandHQ checked Sep 19, 2026	11-50	23 contacts →
	Indirect 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 19, 2026
24	INTAX	Indirect evidence	Sandyford, IrelandHQ checked Sep 19, 2026	11-50	21 contacts →
	Indirect evidence “Intax is award-winning for the best corporate service accountancy firm -Dublin (2021) and tailor accounting, taxation and corporate services to suit companies of all sizes.” Source: RevenueBase Database · checked Sep 19, 2026
25	Whelan Dowling & Associates	Indirect evidence	Santry, IrelandHQ checked Sep 19, 2026	11-50	20 contacts →
	Indirect evidence “Having the right accountant on your team is a critical part of your success and because there’re so much choice out there it can be tricky to find the one that fits exactly with…” Source: RevenueBase Database · checked Sep 19, 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: audit 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 audit firms.
Partial evidence: Its own public description names part of audit firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name audit 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 159 audit firms based in Ireland

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Audit firms based in Ireland at a glance

As of Sep 19, 2026

38.5%Verified-email coverage

72.2Average contacts per company

11-50Median size (employees)

10.1%Largest-city concentration · Dublin

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 159 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 audit 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 Ireland whose own description of what they do matches “audit 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 audit 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 audit firms, 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, 4,420 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 19, 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 audit 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 audit firms are there based in Ireland?

RevenueBase identified 159 audit firms 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?

Kpmg Ireland, headquartered in Dublin, tops this list with the largest team on record.

Which city has the most audit firms?

Dublin leads with 16 headquartered companies, followed by Limerick (7) and Cork (6).

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 4,420 verified decision-maker contacts tracked across these 159 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 19, 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.