Company lists · Data refreshed September 2026

Top 25 Outsource accounting firms based in Belgium

RevenueBase identified 283 company matches for outsource accounting firms associated with Belgium as of September 2026 and tracks 1,184 professional contacts across them, including 618 with verified work emails. Antwerp is the largest hub.

This list covers company matches for outsource accounting firms associated with Belgium, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 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 RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built
283Companies
1,184Contacts tracked
618Verified emails
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The 25 largest outsource accounting firms based in Belgium

Ranked by team size
Top 25 of 283 company matches for outsource accounting firms based in Belgium, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchMechelen, BelgiumHQ recorded Sep 21, 202611-5044 contacts →

Exact match

“Verschaeren & Mertens is an accounting company based in Mechelen, Belgium.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchEmbourg, BelgiumHQ recorded Sep 21, 202611-5034 contacts →

Exact match

“Depuis 3 générations, VERDIN & ASSOCIÉS offre un accompagnement en gestion comptable, fiscale et financière.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchVeurne, BelgiumHQ recorded Sep 21, 202651-20032 contacts →

Exact match

“Accountancy en fiscaliteit, in vertrouwen.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchHerk-de-stad, BelgiumHQ recorded Sep 21, 202611-5025 contacts →

Exact match

“Voor resultaat op mensenmaat Op zoek naar een partner die je cijfers laat spreken en je bedrijf laat groeien?”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchHasselt, BelgiumHQ recorded Sep 21, 202611-5025 contacts →

Exact match

“Cynex is er voor ondernemers die meer zoeken dan wat de huidige, traditionele, accountant of boekhouder te bieden heeft.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchAalst, BelgiumHQ recorded Sep 21, 20261-1020 contacts →

Exact match

“We are bookkeepers.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchLeupegem, BelgiumHQ recorded Sep 21, 202651-20017 contacts →

Exact match

“Welkom bij Bekaert-Callebaut Accountancy.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchKortrijk, BelgiumHQ recorded Sep 21, 202611-5017 contacts →

Exact match

“ACCOFISC is an accounting company based out of PRESIDENT KENNEDYPARK, 24, KORTRIJK, België, Belgium.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchOostduinkerke, BelgiumHQ recorded Sep 21, 202611-5017 contacts →

Exact match

“Madou Vandromme Accountancy te Oostduinkerke is an accounting company based out of Oostduinkerke (Koksijde), Belgium.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchWijnegem, BelgiumHQ recorded Sep 21, 202611-5017 contacts →

Exact match

“Bij bas.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchWaasmunster, BelgiumHQ recorded Sep 21, 202611-5017 contacts →

Exact match

“Net als elk ander boekhoudkantoor verzorgen wij de boekhouding van managementvennootschappen, vrije beroepers en KMO’s.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchJabbeke, BelgiumHQ recorded Sep 21, 202611-5016 contacts →

Exact match

“Stemafisk staat de ondernemer bij in zijn alledaagse administratie en zijn boekhouding.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchBrasschaat, BelgiumHQ recorded Sep 21, 202611-5016 contacts →

Exact match

“Als ondernemer heb je heel wat wettelijke, boekhoudkundige en fiscale verplichtingen die je vaak liever kwijt dan rijk bent.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchVichte, BelgiumHQ recorded Sep 21, 202611-5014 contacts →

Exact match

“Outsourcing van Financiële profielen - Financieel & Juridisch advies - Accountantskantoor OUTSOURCING : De juiste Financieel Expert voor uw KMO (boekhouder, controller, finance…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchKalken, BelgiumHQ recorded Sep 21, 202611-5013 contacts →

Exact match

“Boekhouding, administratie en papierwerk.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchZonhoven, BelgiumHQ recorded Sep 21, 202611-5012 contacts →

Exact match

“CODA Boekhouders en Fiscalisten is a company based out of Belgium.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchDadizele, BelgiumHQ recorded Sep 21, 202611-5011 contacts →

Exact match

“Uw nummer 1 in cijfers ABC Verhelst Accountancy is een allround kantoor voor accountancy en boekhouding voor elke onderneming.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchMechelen, BelgiumHQ recorded Sep 21, 20261-1011 contacts →

Exact match

“Onze visie?”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchTurnhout, BelgiumHQ recorded Sep 21, 20261-1010 contacts →

Exact match

“Een solide boekhouding: het is de basis van élk succesvol bedrijf.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchRoeselare, BelgiumHQ recorded Sep 21, 202651-20010 contacts →

Exact match

“Bofisc is een jong en dynamisch boekhoudkantoor dat zich richt naar kleine en middelgrote KMO's, vrije beroepen en zelfstandigen.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchHasselt, BelgiumHQ recorded Sep 21, 202611-5010 contacts →

Exact match

“ACCOUNTANTSKANTOOR JORDENS is an accounting company based out of 13 Kramerslaan, Hasselt, Belgium.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchEdegem, BelgiumHQ recorded Sep 21, 202611-5010 contacts →

Exact match

“Proctifin is een jong, dynamisch en snelgroeiend accountantskantoor.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchBreendonk, BelgiumHQ recorded Sep 21, 20261-1010 contacts →

Exact match

“at account boekhoudkantoor is een dynamisch kantoor met meer dan 20 jaren ervaring in de begeleiding van zelfstandige en KMO's voor boekhouding, fiscaliteit.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchBorsbeek, BelgiumHQ recorded Sep 21, 202611-509 contacts →

Exact match

“TheOffice was founded in 2005 by Gaby Van Loock and Lode Ilsen as a merger of 3 business- and accounting services each having more than 20 years experience.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchGenk, BelgiumHQ recorded Sep 21, 20261-109 contacts →

Exact match

“Boekhoudkantoor De Factuurwinkel staat voor boekhouding in mensentaal en op mensenmaat.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 283 outsource accounting firms based in Belgium

See the full list, filter by size, metro and specialty, and access 618 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Outsource accounting firms based in Belgium at a glance

As of Sep 21, 2026
52.2%Verified-email coverage
4.2Average contacts per company
1-10Median size (employees)
3.9%Largest-city concentration · Antwerp
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
227
11-50
50
51-200
4

Email recency for this list is measured worldwide rather than for Belgium, so it is reported there. Company counts and contact totals on this page are exact for Belgium, over 283 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with Belgium whose business descriptions match “outsource accounting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 618 professional contacts with verified work emails across the full matched dataset. 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 21, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “outsource accounting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many outsource accounting firms are there based in Belgium?

RevenueBase identified 283 company matches for outsource accounting firms associated with Belgium as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Verschaeren & Mertens tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most outsource accounting firms?

Antwerp leads with 11 company records, followed by Beveren (5) and Edegem (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 618 professional contacts with verified work emails tracked across these 283 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 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.