Company lists · Data refreshed September 2026

Top 25 Private client accounting firms based in Luxembourg

Name: Private client accounting firms based in Luxembourg
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 119 companies tracked

RevenueBase identified 119 private client accounting firms headquartered in Luxembourg as of September 2026 and tracks 910 professional contacts across them, including 348 with verified work emails and 30 with mobile numbers. Luxembourg is the largest hub.

This list covers private client 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

119Companies

910Contacts tracked

348Verified emails

30Mobile numbers

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The 25 largest private client accounting firms based in Luxembourg

Ranked by team size

Top 25 of 119 private client accounting firms based in Luxembourg, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names private client accounting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Atoz TAX AdvisersIndirect evidence	Senningerberg, LuxembourgHQ checked Sep 5, 2026	51-200	242
	“We are a high-end independent advisory firm offering a comprehensive and integrated range of direct and indirect tax solutions, as well as corporate finance, transfer pricing and…” Source: company website · checked Sep 5, 2026
2	AtwellPartial evidence	Hesperange, LuxembourgHQ checked Sep 5, 2026	51-200	44
	“ATWELL is a chartered accountant firm ("expert-comptable") and certified accounting firm ("cabinet de révision agréé") which was founded in 2012.” Source: company website · checked Sep 5, 2026
3	W-Conseil GroupPartial evidence	LuxembourgHQ checked Sep 5, 2026	51-200	42
	“W-Conseil Group is built on a deep understanding of its clients, their ambitions, and their businesses.” Source: company website · checked Sep 5, 2026
4	Fi&foIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	22
	“Issus de cabinets d’audit et de banques, nous croyons en l’émergence d’un nouvel acteur dans les secteurs d’activités d’ingénierie financière et de Family Office grâce à notre…” Source: company website · checked Sep 5, 2026
5	A3t S.APartial evidence	Belvaux, LuxembourgHQ checked Sep 5, 2026	11-50	21
	“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: company website · checked Sep 5, 2026
6	Fiduciaire Fernand FaberIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	19
	“Fiduciaire Fernand Faber was incorporated in 1952 by Mr.” Source: company website · checked Sep 5, 2026
7	Core Capital Management S.APartial evidence	LuxembourgHQ checked Sep 5, 2026	11-50	17
	“Our Core We are a group of financial advisers, with a mutual background from big banks, and with a shared passion for a client focused business model, without ties to any…” Source: company website · checked Sep 5, 2026
8	Family PartnersIndirect evidence	Bascharage, LuxembourgHQ checked Sep 5, 2026	11-50	16
	“Un rôle unique, celui de CFO Familial.” Source: company website · checked Sep 5, 2026
9	Createrra FinanceStrong evidence	Windhof, LuxembourgHQ checked Sep 5, 2026	11-50	15
	“Createrra Finance's vocation is to provide private clientele with full-service, completely independent wealth management.” Source: company website · checked Sep 5, 2026
10	Yours AdvisoryIndirect evidence	LuxembourgHQ checked Sep 5, 2026	1-10	14
	“YOURS is a team of independent and trusted advisors of choice for families and businesses, with a focus on Ultra High Net Worth Individuals (UHNWI’s) and family business owners…” Source: company website · checked Sep 5, 2026
11	Fiscogest SàrlIndirect evidence	Bascharage, LuxembourgHQ checked Sep 5, 2026	11-50	13
	“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: company website · checked Sep 5, 2026
12	NOW Corporate SolutionsStrong evidence	Howald, LuxembourgHQ checked Sep 5, 2026	1-10	11
	“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: company website · checked Sep 5, 2026
13	B.A. FiduciaireIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	11
	“B.A.” Source: company website · checked Sep 5, 2026
14	B&r Consulting LuxembourgPartial evidence	LuxembourgHQ checked Sep 5, 2026	1-10	10
	“B&R Consulting is an accounting and tax consulting firm registered with the Order of Chartered Accountants in Luxembourg.” Source: company website · checked Sep 5, 2026
15	SFC Conseil. Société Fiduciaire, S.À R.L. LuxembourgPartial evidence	LuxembourgHQ checked Sep 5, 2026	11-50	9
	“Au service d’une clientèle tant nationale qu’internationale depuis 1973, notre cabinet offre toutes prestations comptables et fiscales aussi bien pour les particuliers que pour…” Source: company website · checked Sep 5, 2026
16	Ziffer GroupIndirect evidence	Luxembourg City, LuxembourgHQ checked Sep 5, 2026	11-50	9
	“Ziffer Group provides corporate administration, tax advisory, and family office services with a focus on wealth preservation, compliance, and strategic structuring.” Source: company website · checked Sep 5, 2026
17	Aibm S.APartial evidence	Capellen, LuxembourgHQ checked Sep 5, 2026	1-10	8
	“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: company website · checked Sep 5, 2026
18	Accounting, Tax, Expertise & Solutions A.T.E.SIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	8
	“Service de comptabilité pour PME, indépendants et particuliers.” Source: company website · checked Sep 5, 2026
19	White OAK Management S.AIndirect evidence	LuxembourgHQ checked Sep 5, 2026	1-10	8
	“Why?” Source: company website · checked Sep 5, 2026
20	Global Serve LuxembourgPartial evidence	LuxembourgHQ checked Sep 5, 2026	1-10	8
	“Global Serve Luxembourg is an independent expert provider of individually tailored corporate and accounting services.” Source: company website · checked Sep 5, 2026
21	IBS & PartnersIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	7
	“Forte d’une expérience de plus de 30 ans dans le monde des affaires, IBS & Partners a acquis les compétences et connaissances en expertises comptable et fiscale et en…” Source: company website · checked Sep 5, 2026
22	Private Wealth SquarePartial evidence	LuxembourgHQ checked Sep 5, 2026	1-10	7
	“Private Wealth Square provides ‘High Net Worth Consulting Services’ to cater for the rigorous needs of high net worth individuals and their businesses.” Source: company website · checked Sep 5, 2026
23	Your TacsIndirect evidence	LuxembourgHQ checked Sep 5, 2026	11-50	7
	“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: company website · checked Sep 5, 2026
24	KEY Partners S.À R.L. LuxembourgIndirect evidence	LuxembourgHQ checked Sep 5, 2026	1-10	7
	“Key Partners is a new independent player on the local financial market and is a duly registered Chartered Accountant («Ordre des Experts-Comptables »).” Source: company website · checked Sep 5, 2026
25	Patrimoine Consult S.AIndirect evidence	Wemperhardt, LuxembourgHQ checked Sep 5, 2026	1-10	6
	“Société de courtage indépendante installée à Luxembourg depuis 2007, Patrimoine Consult S.A.” Source: company website · checked Sep 5, 2026

Showing 25 of 119 private client accounting firms based in Luxembourg

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Private client accounting firms based in Luxembourg at a glance

As of Sep 5, 2026

1-10Median size (employees)

LuxembourgLargest hub · 67 HQs

30Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

Verified emails by last verification

0–30

325

31–60

61–90

90–180

180+

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 private client accounting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Luxembourg whose own description of what they do matches “private client accounting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among private client 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 an evidence 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, 348 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 5, 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.

Private client accounting firms by metro

Private client accounting firms in Luxembourg67

Frequently asked

How many private client accounting firms are there based in Luxembourg?

RevenueBase identified 119 private client 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?

Atoz TAX Advisers, headquartered in Senningerberg, tops this list with the largest team on record.

Which city has the most private client accounting firms?

Luxembourg leads with 67 headquartered companies, followed by Bertrange (4) and Esch-Sur-Alzette (3).

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 348 verified decision-maker contacts tracked across these 119 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 5, 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 SmartSearch, 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.