Company lists · Data refreshed September 2026

Top 25 Accounting and tax outsourcing companies based in Luxembourg

Name: Accounting and tax outsourcing companies based in Luxembourg
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 86 companies tracked

RevenueBase identified 86 accounting and tax outsourcing companies headquartered in Luxembourg as of September 2026 and tracks 1,094 professional contacts across them, including 531 with verified work emails and 16 with mobile numbers. Luxembourg is the largest hub.

This list covers accounting and tax outsourcing companies 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 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

86Companies

1,094Contacts tracked

531Verified emails

16Mobile numbers

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The 25 largest accounting and tax outsourcing companies based in Luxembourg

Ranked by team size

Top 25 of 86 accounting and tax outsourcing companies based in Luxembourg, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to accounting and tax outsourcing 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	BDO Luxembourg	Indirect evidence	LuxembourgHQ checked Sep 22, 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 22, 2026
2	HB Fiduciaire	Partial evidence	Bertrange, LuxembourgHQ checked Sep 22, 2026	11-50	53 contacts →
	Partial evidence “HB Fiduciaire, based in Bertrange, Luxembourg, offers accounting, taxation, remuneration, and human resources services for businesses.” Source: RevenueBase Database · checked Sep 22, 2026
3	Atwell	Partial evidence	Hesperange, LuxembourgHQ checked Sep 22, 2026	51-200	44 contacts →
	Partial evidence “ATWELL is a chartered accountant firm ("expert-comptable") and certified accounting firm ("cabinet de révision agréé") which was founded in 2012.” Source: RevenueBase Database · checked Sep 22, 2026
4	Neoviaq	Partial evidence	Weiswampach, LuxembourgHQ checked Sep 22, 2026	51-200	34 contacts →
	Partial evidence “From the creation of your company to the management of your accounting, finances, payroll, trademark protection and more!” Source: RevenueBase Database · checked Sep 22, 2026
5	Bureau Comptable Faber & Associés S.À R.L	Indirect evidence	Pétange, LuxembourgHQ checked Sep 22, 2026	1-10	29 contacts →
	Indirect evidence “Service comptable : •Tenue de la comptabilité •Gestion et suivi de la comptabilité clients et fournisseurs •Établissement des comptes annuels, préparation des AGO, AGE et…” Source: RevenueBase Database · checked Sep 22, 2026
6	GT Fiduciaires S.A	Strong evidence	LuxembourgHQ checked Sep 22, 2026	51-200	26 contacts →
	Strong 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 22, 2026
7	Alphatax S.À R.L	Partial evidence	Echternach, LuxembourgHQ checked Sep 22, 2026	11-50	21 contacts →
	Partial evidence “Our goal is to provide the best offshore tax service on the market."Solutions in tax matters" is what we are known for.” Source: RevenueBase Database · checked Sep 22, 2026
8	Efitax Expertises	Indirect evidence	Steinfort, LuxembourgHQ checked Sep 22, 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 22, 2026
9	Fiscogest Sàrl	Indirect evidence	Bascharage, LuxembourgHQ checked Sep 22, 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 22, 2026
10	Fiduciaire DES P.M.E	Indirect evidence	LuxembourgHQ checked Sep 22, 2026	11-50	12 contacts →
	Indirect evidence “L’expertise comptable, le conseil fiscal, l’administration et la gestion du personnel pour suivre la rentabilité de l’entreprise et optimiser la prise de décision.” Source: RevenueBase Database · checked Sep 22, 2026
11	Memola & Partners S.A	Indirect evidence	LuxembourgHQ checked Sep 22, 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 22, 2026
12	B.A. Fiduciaire	Indirect evidence	LuxembourgHQ checked Sep 22, 2026	11-50	11 contacts →
	Indirect evidence “B.A.” Source: RevenueBase Database · checked Sep 22, 2026
13	Corexperts S.A	Indirect evidence	Rumelange, LuxembourgHQ checked Sep 22, 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 22, 2026
14	B&r Consulting Luxembourg	Strong evidence	LuxembourgHQ checked Sep 22, 2026	1-10	10 contacts →
	Strong 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 22, 2026
15	Accounting, Tax, Expertise & Solutions A.T.E.S	Indirect evidence	LuxembourgHQ checked Sep 22, 2026	11-50	8 contacts →
	Indirect evidence “Service de comptabilité pour PME, indépendants et particuliers.” Source: RevenueBase Database · checked Sep 22, 2026
16	Fiduciaire Pierre Kraus & Associés S. À R.L.	Indirect evidence	Mersch, LuxembourgHQ checked Sep 22, 2026	11-50	7 contacts →
	Indirect evidence “Nous sommes un cabinet d'expertise comptable, membre de l'ordre des experts comptables, établi a Mersch depuis 1986.” Source: RevenueBase Database · checked Sep 22, 2026
17	JW Partner	Strong evidence	Windhof (koerich), LuxembourgHQ checked Sep 22, 2026	1-10	6 contacts →
	Strong 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 22, 2026
18	Euraudit Consult S.A	Indirect evidence	LuxembourgHQ checked Sep 22, 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 22, 2026
19	Fiduciaire Jean-Marc Faber	Indirect evidence	LuxembourgHQ checked Sep 22, 2026	11-50	5 contacts →
	Indirect evidence “Fiduciaire Jean-Marc Faber is a member of the Luxembourg Institute of Chartered Accountants, with 25 years of experience in a constantly and demanding environment.” Source: RevenueBase Database · checked Sep 22, 2026
20	Fidalpha S.A	Indirect evidence	LuxembourgHQ checked Sep 22, 2026	1-10	4 contacts →
	Indirect evidence “Fidalpha SA a été créée à l’initiative de Monsieur Marcel Krier.” Source: RevenueBase Database · checked Sep 22, 2026
21	QCO Groupe S.À R.L	Indirect evidence	Strassen, LuxembourgHQ checked Sep 22, 2026	1-10	4 contacts →
	Indirect evidence “Fondée en 2014, QCo Groupe est le fruit de plus de 30 ans d’expérience.” Source: RevenueBase Database · checked Sep 22, 2026
22	Fidcoserv S.À R.L	Indirect evidence	LuxembourgHQ checked Sep 22, 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 22, 2026
23	Fiduciaire Schneider & Associes	Strong evidence	Niederanven, LuxembourgHQ checked Sep 22, 2026	11-50	3 contacts →
	Strong evidence “SCHNEIDER LINSTER FIDUCIAIRE offers a full range of accounting, tax and business services for local and international clients.” Source: RevenueBase Database · checked Sep 22, 2026
24	JD TAX & Services	Indirect evidence	Wilz, LuxembourgHQ checked Sep 22, 2026	1-10	3 contacts →
	Indirect evidence “Our firm is established in the Grand Duchy of Luxembourg and in Belgium.” Source: RevenueBase Database · checked Sep 22, 2026
25	Fiduciaire Intercommunautaire Icom	Partial evidence	LuxembourgHQ checked Sep 22, 2026	11-50	3 contacts →
	Partial evidence “Fiduciaire Intercommunautaire is a multidisciplinary firm with over twenty years of expertise in the field of accounting and consulting.” 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 tax outsourcing 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 accounting and tax outsourcing companies.
Partial evidence: Its own public description names part of accounting and tax outsourcing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accounting and tax outsourcing 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 86 accounting and tax outsourcing companies based in Luxembourg

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Accounting and tax outsourcing companies based in Luxembourg at a glance

As of Sep 22, 2026

48.5%Verified-email coverage

1.5%Mobile-number coverage

12.7Average contacts per company

1-10Median size (employees)

38.4%Largest-city concentration · Luxembourg

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

Freshness & accuracy

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

Email last verified

Median 24.0d

4000–30

12631–60

461–90

090–180

1180+

Company record updated

Median 69.0d

00–30

36731–60

49861–90

17190–180

58180+

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 tax outsourcing 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 Luxembourg whose own description of what they do matches “accounting and tax outsourcing 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 accounting and tax outsourcing 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 accounting and tax outsourcing companies, 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, 531 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 tax outsourcing companies by metro

Accounting and tax outsourcing companies 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 accounting and tax outsourcing 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 accounting and tax outsourcing companies are there based in Luxembourg?

RevenueBase identified 86 accounting and tax outsourcing companies 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?

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

Which city has the most accounting and tax outsourcing companies?

Luxembourg leads with 33 headquartered companies, followed by Strassen (5) and Bertrange (4).

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 531 verified decision-maker contacts tracked across these 86 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.