Company lists · Data refreshed September 2026
Top 25 Corporate tax firms based in Spain
RevenueBase identified 503 corporate tax firms headquartered in Spain as of September 2026 and tracks 5,414 professional contacts across them, including 701 with verified work emails. Madrid is the largest hub.
This list covers corporate tax firms headquartered in Spain, 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 19, 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.
The 25 largest corporate tax firms based in Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,853 contacts → | ||||
Partial evidence “Garrigues is an international legal and tax services firm that advises clients locally, regionally and globally from every angle of business law.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 181 contacts → | ||||
Indirect evidence “Nuestras asesorías en Cartagena y Murcia están altamente capacitadas para realizar un servicio global de asesoramiento laboral, fiscal y contable.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 44 contacts → | ||||
Indirect evidence “Ges-Start responde a todas las necesidades en el ámbito de la asesoría contable, fiscal y laboral.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 43 contacts → | ||||
Indirect evidence “En Varona Legal & Numbers encontrarás a tu alcance un equipo de profesionales abogados y economistas dedicados a la asesoría fiscal, contable, mercantil y jurídica, con una…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 41 contacts → | ||||
Indirect evidence “Firma legal especializada en la abogacía de los negocios.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 39 contacts → | ||||
Indirect evidence “ILIA ETL GLOBAL es una asesoría especializada en fiscalidad y legalidad Internacional.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 35 contacts → | ||||
Indirect evidence “FISELA es un Despacho que nació en 1980.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 29 contacts → | ||||
Indirect evidence “Bestax es un despacho en expansión especializado en derecho fiscal y legal con sedes en Pamplona, Vitoria y una oficina de representación en Madrid.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 28 contacts → | ||||
Strong evidence “LGC is an LLP International firm specialized in Legal, Tax and Administrative consulting, taking especially care of International tax, corporate, investment and immigration…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 27 contacts → | ||||
Indirect evidence “HFC Grupo es una firma de servicios profesionales con más de 40 años de experiencia, dedicada a proporcionar soluciones integrales en abogacía de los negocios, consultoría de…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 25 contacts → | ||||
Partial evidence “B LAW & TAX is a leading firm in tax and legal advisory services with both national and international reach.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 24 contacts → | ||||
Indirect evidence “En Euskaltax trabajamos desde el año 1998 en el ámbito del asesoramiento tributario y mercantil.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 20 contacts → | ||||
Partial evidence “GRBD es un despacho de abogados especializado en asesoramiento fiscal, derecho corporativo y de los negocios, litigiosidad civil, penal y tributaria.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 19 contacts → | ||||
Indirect evidence “Suandco tiene su origen en el despacho fundado en 1951 por Don Francisco Suarez Sotillo, abogado e Inspector de Hacienda.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 18 contacts → | ||||
Indirect evidence “GRUP GESTIÓ és un gabinet professional d’assessorament i consultoria empresarial, que ofereix un servei integral, a empreses i particulars, en la gestió de les seves activitats.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 17 contacts → | ||||
Indirect evidence “Despacho de asesoramiento fiscal, contable y legal de larga tradición en Barcelona y trato personalizado.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 16 contacts → | ||||
Partial evidence “ALTALEX is a Firm of tax & legal advisors based in Barcelona, Spain.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 16 contacts → | ||||
Partial evidence “ROMA BOHORQUES TAX & LEGAL es un despacho especializado en conflicto tributario, M&A, asesoramiento fiscal y mercantil en estructuración societaria, empresa familiar y conflicto…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 16 contacts → | ||||
Indirect evidence “El equipo de Muro & San Juan está presidido por un estándar de máxima calidad.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 14 contacts → | ||||
Indirect evidence “Ofrecemos una asesoría integral a las empresas respecto al cumplimiento de sus obligaciones tributarias, proporcionándoles al mismo tiempo nuestro apoyo para la solución de sus…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 14 contacts → | ||||
Partial evidence “CONSULTING 21 TAX GROUP SL Asesoría con amplia experiencia en asesoramiento fiscal, contable, laboral y mercantil.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 13 contacts → | ||||
Partial evidence “Allow us to welcome you to an international firm with a boutique mindset, specialising in the tax optimisation of your wealth.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 13 contacts → | ||||
Partial evidence “Tax Boutique establecida en Barcelona especializada en la asesoría fiscal y la planificación tributaria tanto en el ámbito nacional como internacional.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 12 contacts → | ||||
Indirect evidence “Somos un despacho con más de cuarenta años de experiencia, integrado por más treinta de profesionales que ofrecemos un asesoramiento integral a nuestros clientes, dispensándoles…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 12 contacts → | ||||
Indirect evidence “Fiscontrol Assessors es un despacho de profesionales tributarios que presta sus servicios desde 1985.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
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: corporate tax 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 corporate tax firms.
- Partial evidence
- Its own public description names part of corporate tax firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name corporate tax 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 503 corporate tax firms based in Spain
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Corporate tax firms based in Spain at a glance
As of Sep 19, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 503 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 corporate tax 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 Spain whose own description of what they do matches “corporate tax 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 corporate tax 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 corporate tax firms, and records with no verified work email. Companies headquartered outside Spain 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, 701 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 19, 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.
Corporate tax firms by metro
- Corporate tax firms in Madrid90
- Corporate tax firms in Barcelona66
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 corporate tax 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 corporate tax firms are there based in Spain?
RevenueBase identified 503 corporate tax firms headquartered in Spain 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?
Garrigues, headquartered in Madrid, tops this list with the largest team on record.
Which city has the most corporate tax firms?
Madrid leads with 90 headquartered companies, followed by Barcelona (66) and Valencia (18).
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 701 verified decision-maker contacts tracked across these 503 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 19, 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.
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