Company lists · Data refreshed September 2026

Top 25 Cross-border accounting firms based in Luxembourg

Name: Cross-border accounting firms based in Luxembourg
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 67 companies tracked

RevenueBase identified 67 cross-border accounting firms headquartered in Luxembourg as of September 2026 and tracks 5,353 professional contacts across them, including 2,086 with verified work emails and 64 with mobile numbers. Luxembourg is the largest hub.

This list covers cross-border accounting firms headquartered in Luxembourg, 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 29, 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 29, 2026 86% judged on-target in blind review

67Companies

5,353Contacts tracked

2,086Verified emails

64Mobile numbers

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The 25 largest cross-border accounting firms based in Luxembourg

Ranked by team size

Top 25 of 67 cross-border accounting firms based in Luxembourg, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to cross-border 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	PWC Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 29, 2026	1,001-5,000	3,413 contacts →
	Indirect evidence “PwC Luxembourg is the largest professional services firm in Luxembourg with over 3,600 people employed from 90 different countries.” Source: RevenueBase Database · checked Sep 29, 2026
2	BDO Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 29, 2026	501-1,000	600 contacts →
	Indirect evidence “BDO Luxembourg is one of the largest firms of accountants, auditors and consultants in Luxembourg.” Source: RevenueBase Database · checked Sep 29, 2026
3	Forvis Mazars In Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 29, 2026	201-500	359 contacts →
	Indirect evidence “Forvis Mazars Group SC is an independent member of Forvis Mazars Global, a leading professional services network.” Source: RevenueBase Database · checked Sep 29, 2026
4	Parfi Group	Indirect evidence	Leudelange, LuxembourgHQ checked Sep 29, 2026	51-200	87 contacts →
	Indirect evidence “Founded in 1969, ParFi Group has a rich history and renowned expertise in the field of accountancy in Luxembourg.” Source: RevenueBase Database · checked Sep 29, 2026
5	GT Fiduciaires S.A	Partial evidence	LuxembourgHQ checked Sep 29, 2026	51-200	26 contacts →
	Partial evidence “Thanks to a team of specialists in the field of accounting, tax, social security and consulting, we assist SMEs and businesses of all sizes in the management of their daily lives.” Source: RevenueBase Database · checked Sep 29, 2026
6	A3t S.A	Indirect evidence	Belvaux, LuxembourgHQ checked Sep 29, 2026	11-50	21 contacts →
	Indirect evidence “We enable clients operating in all sectors to create and manage growth by providing them timely, accurate and prudent advice on audit, accountancy, corporate and financial…” Source: RevenueBase Database · checked Sep 29, 2026
7	Ficel Group Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 29, 2026	51-200	20 contacts →
	Indirect evidence “Ficel Group est un cabinet d'experts-comptables et de consultants établi au Luxembourg.” Source: RevenueBase Database · checked Sep 29, 2026
8	Efitax Expertises	Indirect evidence	Steinfort, LuxembourgHQ checked Sep 29, 2026	11-50	17 contacts →
	Indirect evidence “Cabinet d’expertise comptable et fiscale spécialisé dans le support comptable, financier et fiscal aux PME et aux particuliers.” Source: RevenueBase Database · checked Sep 29, 2026
9	Fiduciaire Eurolux	Partial evidence	LuxembourgHQ checked Sep 29, 2026	11-50	16 contacts →
	Partial evidence “Since 1995, FIDUCIAIRE EUROLUX offers the following professional services: High-quality accounting and internal audit, characterised by our many years of experience; preparation…” Source: RevenueBase Database · checked Sep 29, 2026
10	ADC Group Consulting	Partial evidence	Weiswampach, LuxembourgHQ checked Sep 29, 2026	11-50	15 contacts →
	Partial evidence “Whether tax consultancy, accounting, payroll accounting or human resources, we support you with innovative technologies in the digitalisation process, so that you always know…” Source: RevenueBase Database · checked Sep 29, 2026
11	Fiscogest Sàrl	Indirect evidence	Bascharage, LuxembourgHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect evidence “La société Fiscogest S.à r.l, créée en 2007, est une équipe de professionnels jeunes et dynamiques vous garantissant un service de confiance personnalisé.” Source: RevenueBase Database · checked Sep 29, 2026
12	NOW Corporate Solutions	Partial evidence	Howald, LuxembourgHQ checked Sep 29, 2026	1-10	11 contacts →
	Partial evidence “NoW Corporate Solutions is a new generation accounting firm providing specialized bespoke services and guidance for business firms as well as for real estate, private equity, or…” Source: RevenueBase Database · checked Sep 29, 2026
13	Memola & Partners S.A	Indirect evidence	LuxembourgHQ checked Sep 29, 2026	11-50	11 contacts →
	Indirect evidence “Memola & Partners, Société Anonyme de conseil comptable, fiscal et social a été créée en 1994 et existe sous cette forme depuis 2007.” Source: RevenueBase Database · checked Sep 29, 2026
14	B.A. Fiduciaire	Indirect evidence	LuxembourgHQ checked Sep 29, 2026	11-50	11 contacts →
	Indirect evidence “B.A.” Source: RevenueBase Database · checked Sep 29, 2026
15	Corexperts S.A	Indirect evidence	Rumelange, LuxembourgHQ checked Sep 29, 2026	11-50	11 contacts →
	Indirect evidence “Implanté à Luxembourg, notre cabinet dispose d'un réseau et d'une expertise transfrontalière.” Source: RevenueBase Database · checked Sep 29, 2026
16	B&r Consulting Luxembourg	Partial evidence	LuxembourgHQ checked Sep 29, 2026	1-10	10 contacts →
	Partial evidence “B&R Consulting is an accounting and tax consulting firm registered with the Order of Chartered Accountants in Luxembourg.” Source: RevenueBase Database · checked Sep 29, 2026
17	Mazars In Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 29, 2026	201-500	10 contacts →
	Indirect evidence “Mazars est un groupe international et intégré spécialisé dans l’audit, la fiscalité et le conseil ainsi que dans les services comptables et juridiques*.” Source: RevenueBase Database · checked Sep 29, 2026
18	Aibm S.A	Indirect evidence	Capellen, LuxembourgHQ checked Sep 29, 2026	1-10	8 contacts →
	Indirect evidence “Plus qu'un cabinet d'expertise comptable, AIBM offre à ses clients luxembourgeois et internationaux un accompagnement personnalisé et complet au travers de ses pôles d'expertises…” Source: RevenueBase Database · checked Sep 29, 2026
19	Accounting, Tax, Expertise & Solutions A.T.E.S	Indirect evidence	LuxembourgHQ checked Sep 29, 2026	11-50	8 contacts →
	Indirect evidence “Service de comptabilité pour PME, indépendants et particuliers.” Source: RevenueBase Database · checked Sep 29, 2026
20	Your Tacs	Indirect evidence	LuxembourgHQ checked Sep 29, 2026	11-50	7 contacts →
	Indirect evidence “Your TACS, now part of Hawksford, is a Luxembourg company authorized as “Expert-Comptable" and is member of the “OEC – Ordre des experts-comptables”, the Luxembourg professional…” Source: RevenueBase Database · checked Sep 29, 2026
21	Baker Tilly Luxembourg	Partial evidence	LuxembourgHQ checked Sep 29, 2026	51-200	7 contacts →
	Partial evidence “Are you looking for a proactive accounting service?” Source: RevenueBase Database · checked Sep 29, 2026
22	JW Partner	Partial evidence	Windhof (koerich), LuxembourgHQ checked Sep 29, 2026	1-10	6 contacts →
	Partial evidence “ACCOUNTING - TAX - CORPORATE - CONSULTING JW Partner combines a depth of knowledge and recognized expertise within a nimble structure to spare your company the bureaucracy and…” Source: RevenueBase Database · checked Sep 29, 2026
23	Euraudit Consult S.A	Indirect evidence	LuxembourgHQ checked Sep 29, 2026	1-10	6 contacts →
	Indirect evidence “Euraudit Consult est un cabinet d’Expertise-Comptable pour les entreprises et les indépendants à la recherche d’une expertise et de solutions de haute qualité.” Source: RevenueBase Database · checked Sep 29, 2026
24	Fideis	Indirect evidence	Clemency, LuxembourgHQ checked Sep 29, 2026	1-10	5 contacts →
	Indirect evidence “Fideis est une société luxembourgeoise d’expertise comptable aux services des PME, tant au Luxembourg qu’en Belgique.” Source: RevenueBase Database · checked Sep 29, 2026
25	Fidcoserv S.À R.L	Indirect evidence	LuxembourgHQ checked Sep 29, 2026	1-10	3 contacts →
	Indirect evidence “Etablie à Luxembourg depuis sa création en 1993, Fidcoserv Sàrl est un cabinet comptable à taille humaine au service des petites et moyennes entreprises (PME et PMI).” Source: RevenueBase Database · checked Sep 29, 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: cross-border 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 cross-border accounting firms.
Partial evidence: Its own public description names part of cross-border accounting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cross-border 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 67 cross-border accounting firms based in Luxembourg

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Cross-border accounting firms based in Luxembourg at a glance

As of Sep 29, 2026

39.0%Verified-email coverage

1.2%Mobile-number coverage

79.9Average contacts per company

11-50Median size (employees)

49.3%Largest-city concentration · Luxembourg

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

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

Email last verified

Median 31.0d

8920–30

1,13731–60

5461–90

090–180

3180+

Company record updated

Median 69.0d

00–30

2,20131–60

1,72561–90

1,08690–180

341180+

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 cross-border 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 Luxembourg whose own description of what they do matches “cross-border 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 cross-border 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 cross-border accounting firms, and records with no verified work email. Companies headquartered outside Luxembourg 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, 2,086 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 29, 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.

Cross-border accounting firms by metro

Cross-border accounting firms in Luxembourg33

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 cross-border 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 cross-border accounting firms are there based in Luxembourg?

RevenueBase identified 67 cross-border accounting firms headquartered in Luxembourg 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?

PWC Luxembourg, headquartered in Luxembourg, tops this list with the largest team on record.

Which city has the most cross-border accounting firms?

Luxembourg leads with 33 headquartered companies, followed by Strassen (3) and Bertrange (2).

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 2,086 verified decision-maker contacts tracked across these 67 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 29, 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.