Company lists · Data refreshed September 2026

Top 25 Accounting and outsourcing services based in Ireland

Name: Accounting and outsourcing 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 496 companies tracked

RevenueBase identified 496 accounting and outsourcing services headquartered in Ireland as of September 2026 and tracks 7,678 professional contacts across them, including 3,279 with verified work emails and 243 with mobile numbers. Dublin is the largest hub.

This list covers accounting and outsourcing 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

496Companies

7,678Contacts tracked

3,279Verified emails

243Mobile numbers

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The 25 largest accounting and outsourcing services based in Ireland

Ranked by team size

Top 25 of 496 accounting and outsourcing 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 accounting and outsourcing 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	Grant Thornton Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 22, 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 22, 2026
2	BDO Ireland	Partial evidence	Dublin, IrelandHQ checked Sep 22, 2026	201-500	521 contacts →
	Partial 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 22, 2026
3	Moore Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 22, 2026	201-500	171 contacts →
	Indirect evidence “Moore Ireland is a leading Irish provider of accountancy and advisory services to the mid-market with the infrastructural capacity of a large firm.” Source: RevenueBase Database · checked Sep 22, 2026
4	Crowleysdfk	Indirect evidence	Dublin 2, IrelandHQ checked Sep 22, 2026	51-200	129 contacts →
	Indirect evidence “At Crowleys DFK we believe in creating value for our clients.” Source: RevenueBase Database · checked Sep 22, 2026
5	Axon Outsourcing Limited	Strong evidence	Dublin, IrelandHQ checked Sep 22, 2026	51-200	120 contacts →
	Strong evidence “Axon Outsourcing is an ISO 9001:2015 and ISO 27001:2013 Certified Company, GDPR compliant, ACCA approved employer and as a dedicated supplier of accounting services to accounting…” Source: RevenueBase Database · checked Sep 22, 2026
6	FMB Chartered Accountants	Indirect evidence	Dublin 7, IrelandHQ checked Sep 22, 2026	11-50	112 contacts →
	Indirect evidence “Welcome to FMB Chartered Accountants.” Source: RevenueBase Database · checked Sep 22, 2026
7	OSK	Indirect evidence	Dublin, IrelandHQ checked Sep 22, 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 22, 2026
8	BDO Limerick	Indirect evidence	Limerick, IrelandHQ checked Sep 22, 2026	51-200	75 contacts →
	Indirect evidence “BDO is the only multi-disciplined, “relationship based” accountancy firm focusing on entrepreneurial and growing businesses in Ireland.” Source: RevenueBase Database · checked Sep 22, 2026
9	Cronin & Company	Indirect evidence	Terenure, IrelandHQ checked Sep 22, 2026	11-50	74 contacts →
	Indirect evidence “Cronin & Company was established in 1978 by Michael Cronin.” Source: RevenueBase Database · checked Sep 22, 2026
10	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
11	HLB Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 22, 2026	51-200	70 contacts →
	Indirect evidence “HLB Ireland provide quality accountancy services and business advice to entrepreneurial and owner managed businesses.” Source: RevenueBase Database · checked Sep 22, 2026
12	UHY Farrelly Dawe White Limited	Indirect evidence	Dundalk, IrelandHQ checked Sep 22, 2026	51-200	68 contacts →
	Indirect 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
13	Taxassist Accountants Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 22, 2026	11-50	62 contacts →
	Indirect evidence “TaxAssist Accountants offers an accountancy service that reflects the way we all work today.” Source: RevenueBase Database · checked Sep 22, 2026
14	Kinore, Finance & Business Services	Partial evidence	Dublin, IrelandHQ checked Sep 22, 2026	51-200	61 contacts →
	Partial evidence “Kinore is a multi-award-winning chartered accountancy firm offering accounting, bookkeeping, payroll, and company secretarial services.” Source: RevenueBase Database · checked Sep 22, 2026
15	CSG	Indirect evidence	Tralee, IrelandHQ checked Sep 22, 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 22, 2026
16	O'neill Foley	Indirect evidence	Kilkenny, IrelandHQ checked Sep 22, 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 22, 2026
17	Retail Financial Solutions RFS	Indirect evidence	Cork, IrelandHQ checked Sep 22, 2026	11-50	43 contacts →
	Indirect evidence “Retail Financial Solutions (RFS) is an Irish owned company that provides best-in-class complete financial solutions for retail clients, resulting in increased margins and cost…” Source: RevenueBase Database · checked Sep 22, 2026
18	Noone Casey	Indirect evidence	Dublin 2, IrelandHQ checked Sep 22, 2026	11-50	42 contacts →
	Indirect evidence “Noone Casey is a Dublin based Accountancy & Advisory firm.” Source: RevenueBase Database · checked Sep 22, 2026
19	Gilroy Gannon Chartered Accountants	Partial evidence	Sligo, IrelandHQ checked Sep 22, 2026	51-200	41 contacts →
	Partial 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 22, 2026
20	MBSL	Partial evidence	Dundrum, IrelandHQ checked Sep 22, 2026	11-50	34 contacts →
	Partial evidence “MBSL is a firm of chartered accountants specialising in outsourced accounting.” Source: RevenueBase Database · checked Sep 22, 2026
21	Dbass Accountancy & TAX Advisory	Indirect evidence	Ashbourne, IrelandHQ checked Sep 22, 2026	11-50	30 contacts →
	Indirect evidence “DBASS are a medium sized chartered accountancy firm based in Leinster, which has been delivering a broad range of accountancy and business advisory services to our clients for…” Source: RevenueBase Database · checked Sep 22, 2026
22	Mcinerney Saunders	Indirect evidence	Swords, IrelandHQ checked Sep 22, 2026	11-50	30 contacts →
	Indirect evidence “McInerney Saunders is a firm of Chartered Accountants & Business Advisers with offices in Swords, North County Dublin, adjacent to Dublin's international airport, which is part of…” Source: RevenueBase Database · checked Sep 22, 2026
23	Kieran Ryan & CO	Indirect evidence	Dublin 2, IrelandHQ checked Sep 22, 2026	11-50	27 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
24	Leonard & Company	Indirect evidence	Rathfarnham, IrelandHQ checked Sep 22, 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 22, 2026
25	BCA TAX & Business Consultants	Indirect evidence	Tullamore, IrelandHQ checked Sep 22, 2026	11-50	25 contacts →
	Indirect 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

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: accounting and outsourcing 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 accounting and outsourcing services.
Partial evidence: Its own public description names part of accounting and outsourcing services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accounting and outsourcing 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 496 accounting and outsourcing services based in Ireland

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Accounting and outsourcing services based in Ireland at a glance

As of Sep 22, 2026

42.7%Verified-email coverage

3.2%Mobile-number coverage

15.5Average contacts per company

1-10Median size (employees)

13.9%Largest-city concentration · Dublin

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

312

11-50

157

51-200

201-500

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 24.0d

2,5200–30

70931–60

4061–90

190–180

9180+

Company record updated

Median 77.0d

00–30

2,08131–60

3,39461–90

1,67990–180

524180+

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 accounting and outsourcing 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 “accounting and outsourcing 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 accounting and outsourcing 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 accounting and outsourcing 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, 3,279 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.

Accounting and outsourcing services by metro

Accounting and outsourcing services in Dublin69

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 accounting and outsourcing 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 accounting and outsourcing services are there based in Ireland?

RevenueBase identified 496 accounting and outsourcing 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?

Grant Thornton Ireland, headquartered in Ireland, tops this list with the largest team on record.

Which city has the most accounting and outsourcing services?

Dublin leads with 69 headquartered companies, followed by Cork (22) and Galway (16).

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 3,279 verified decision-maker contacts tracked across these 496 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.