Company lists · Data refreshed September 2026

Top 14 Tax service providers based in Türkiye

RevenueBase identified 98 tax service providers headquartered in Türkiye as of September 2026 and tracks 317 professional contacts across them, including 31 with verified work emails. Istanbul is the largest hub.

This list covers tax service providers headquartered in Türkiye, 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
98Companies
317Contacts tracked
31Verified emails
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The 14 largest tax service providers based in Türkiye

Ranked by team size
Top 14 of 98 tax service providers based in Türkiye, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to tax service providers: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidenceAtasehir, TürkiyeHQ checked Sep 22, 202611-5014 contacts →

Strong evidence

“Andersen in Turkey: Trusted Tax, Audit & Advisory for Confident Growth Andersen in Turkey helps Turkish and international businesses navigate tax, audit, accounting, and advisory…”

Source: RevenueBase Database · checked Sep 22, 2026
2Indirect evidenceIstanbul, TürkiyeHQ checked Sep 22, 202611-5010 contacts →

Indirect evidence

“Level International is an international advisory firm focusing on the cross-border issues.”

Source: RevenueBase Database · checked Sep 22, 2026
3Indirect evidenceTaksim Beyoğlu, TürkiyeHQ checked Sep 22, 20261-109 contacts →

Indirect evidence

“Neden Accounting & Finance?”

Source: RevenueBase Database · checked Sep 22, 2026
4Indirect evidenceAtaşehir, TürkiyeHQ checked Sep 22, 20261-106 contacts →

Indirect evidence

“Mükellefler, ekonomik ve ticari faaliyetleri süresince karşılaştıkları risk ve beklenmeyen kamusal uyum maliyetlerini optimal ve öngörülebilir tutmak için üst düzey bir vergi…”

Source: RevenueBase Database · checked Sep 22, 2026
5Indirect evidenceBuyukcekmece, TürkiyeHQ checked Sep 22, 202611-506 contacts →

Indirect evidence

“Vergi Denetimi Denetim Finansal Danışmanlık Finansal Hizmetler”

Source: RevenueBase Database · checked Sep 22, 2026
6Indirect evidenceSeyhan, TürkiyeHQ checked Sep 22, 20261-105 contacts →

Indirect evidence

“Vergi denetim ve danışmanlık hizmeti vermekteyim.”

Source: RevenueBase Database · checked Sep 22, 2026
7Strong evidenceYda Center Dumlupınar Bulvarı No:9 A Blok Kat:20 D:763 Çukurambar, TürkiyeHQ checked Sep 22, 20261-104 contacts →

Strong evidence

“Vergi, Denetim, Danışmanlık Hizmetleri Tax, Audit, Advisory Services”

Source: RevenueBase Database · checked Sep 22, 2026
8Indirect evidenceAnkara, TürkiyeHQ checked Sep 22, 202611-504 contacts →

Indirect evidence

“Since 1994 Mert CPA Ltd.”

Source: RevenueBase Database · checked Sep 22, 2026
9Indirect evidenceKartal, TürkiyeHQ checked Sep 22, 20261-104 contacts →

Indirect evidence

“CYC Değer Mali Müşavirlik ve Denetim Hizmetleri olarak sayfamızda vergi mevzuatı sosyal güvenlik mevzuatı ve diğer ekonomi ve mali konular hakkında sizlere bilgilendirme yapacağız.”

Source: RevenueBase Database · checked Sep 22, 2026
10Indirect evidenceIstanbul, TürkiyeHQ checked Sep 22, 20261-104 contacts →

Indirect evidence

“We provide the following services to individuals, large, medium and small businesses and other agencies in Turkey.”

Source: RevenueBase Database · checked Sep 22, 2026
11Indirect evidenceAnkara, TürkiyeHQ checked Sep 22, 20261-103 contacts →

Indirect evidence

“Duman Global, konusunda uzman profesyonellerce; başta yeminli mali müşavirlik olmak üzere teşvik, vergi danışmanlığı, finans ve muhasebe, mali hukuk, kurumsal yönetim, bütçeleme…”

Source: RevenueBase Database · checked Sep 22, 2026
12Indirect evidenceBeylikduzu, TürkiyeHQ checked Sep 22, 20261-102 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 22, 2026
13Indirect evidenceSariyer, TürkiyeHQ checked Sep 22, 202611-501 contacts →

Indirect evidence

“2011 yılından bu yana iş ortaklarımıza vergi, muhasebe ve denetim konularında hizmet vermekteyiz.”

Source: RevenueBase Database · checked Sep 22, 2026
14Indirect evidenceAtasehir, TürkiyeHQ checked Sep 22, 20261-101 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 22, 2026

Showing 14 of 98 tax service providers based in Türkiye

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Tax service providers based in Türkiye at a glance

As of Sep 22, 2026
9.8%Verified-email coverage
3.2Average contacts per company
1-10Median size (employees)
29.6%Largest-city concentration · Istanbul
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
69
11-50
27
51-200
2

Email recency for this list is measured worldwide rather than for Türkiye, so it is reported there. Company counts and contact totals on this page are exact for Türkiye, over 98 companies.

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 tax service providers, 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 Türkiye whose own description of what they do matches “tax service providers”. 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 tax service providers), 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 tax service providers, and records with no verified work email. Companies headquartered outside Türkiye 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, 31 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.

Tax service providers by metro

  • Tax service providers in Istanbul29

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 tax service providers, 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 tax service providers are there based in Türkiye?

RevenueBase identified 98 tax service providers headquartered in Türkiye 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?

Andersen In Turkey, headquartered in Atasehir, tops this list with the largest team on record.

Which city has the most tax service providers?

Istanbul leads with 29 headquartered companies, followed by Atasehir (7) and Ankara (6).

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 31 verified decision-maker contacts tracked across these 98 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.