Tax practice
Responsible area partner
Tax audits, wealth planning, international taxation, non-residents, and crypto.
REAF · 22+ yrs · ES · EN · DE
Corporate transactions, capital markets and strategic deals.
Independent assessment and rigorous valuation of assets and businesses.
Business reinvention, sustainability and wealth management.
Corporate governance, succession and transformation
International tax planning and cross-border structuring.
Regulatory compliance and tax reporting obligations.
Special regimes for individuals and digital assets.
Tax defense and wealth taxes
Corporate immigration, ICT transfers, investor residency, digital nomad and regularisation.
Employment relations, mobility and regulatory protection.
Protection, compliance and digital resilience
Data protection, DPO and AI regulation
Company formation, contracts, shareholder agreements and corporate operations.
Contracts, dismissals, redundancies and labour court representation.
Insolvency proceedings, fresh start, micro-enterprise procedure and dissolution.
Litigation, arbitration, mediation, IP and real estate law.
Accounting, reporting and outsourced financial management.
Entity management, governance and personnel administration.
Incorporation, incentives and business acceleration.
Risk management, continuity and recovery
New guides on the latest Spanish tax and immigration developments.
Practical tools for informed decision-making.
Everything BMC One does
Each capability links to its area. Partial: part of it works; the detail is on the area page.
Try
Business Services
Tax
Legal
Security
Nothing for “”. Try “VAT”, “payroll”, or “signature”.
By area
Business ServicesOperations
Your business, up to date in one place
Our team books, calculates and submits.
Ask your assistantExamples
How many active employees do we have, and under which collective agreement and type of contract?
Add these three employees with their DNI, Social Security number and start dateThey stay in BMC One; nothing is notified to Social Security.
Tax
Every Spanish tax deadline, in plain sight
Our team prepares, files and responds.
Ask your assistantExamples
Which returns do we have this quarter and which have already been filed?
Change the tax address on the record to Calle Muestra 5, MadridIt changes the record in BMC One; nothing changes with the AEAT.
Legal
Every phase, with its status and its date
BMC lawyers handle every matter; in BMC One you see its phases and the status of each one.
Ask your assistantExamples
Which documents are still awaiting signature and who has yet to sign?
Prepare an envelope for Lucía Prueba to sign this contract on the last pageIt stays in draft. Sending it is a critical action: only with the Custom role.
Strategy
The whole transaction in one file
The analysis and the recommendation are signed by the people on the team.
Ask your assistantExamples
Find what BMC has written to us about the capital increase
Where do the tax obligations of every company in the group stand, and which one has gaps?With a group access.
Across all areas
ConnectionsAPI, MCP and webhooks
It works with any assistant that supports remote MCP connectors with OAuth sign-in; for example, Claude, which we have tested it with, or ChatGPT Business, Enterprise and Edu, as documented.
With a token, also Gemini CLI, Cursor, n8n, Make or Zapier; and, by API and signed webhooks, your own systems.
No assistant files with the AEAT, moves money or signs for you.
Only with the Custom role, chosen permission by permission.
API and MCPConnect your AIIntegrationsPublic administrations
Security
Its own scoped access, never your session
BMC One, its database and your documents are on our own dedicated servers in Europe. The database is not exposed to the internet.
No assistant files with the AEAT, moves money or signs for you.
Illustration of what you choose when you authorise an access. Fictitious data.
Returns
ReturnsForms 720, 721 and 210
Returns for investors and non-residents
Assets held abroad, crypto assets and non-resident income, at two levels: Platform and With an adviser.
BMC's client environment, included in your engagement: never sold separately.
Boutique tax & legal advisory
Strategy, tax, legal and operations: always the area specialist, from the first contact. No escalation to juniors, no internal handoffs, no surprises on the invoice.
25+
years active
15
offices
500+
businesses advised
REAF · ICAM
with professional indemnity insurance
ES · EN · DE
native-speaker advisors
Handled by the responsible partner, not a case manager · Google Meet · Professional confidentiality from the first email · Free cancellation up to 24 h before
What we don't do
We don't chase volume. We don't assign your case to an associate. We don't work on contingency fees: professional independence or nothing.
We take on a limited number of new clients each quarter. If we can't add real value, we'll tell you in the first conversation.
Speak with the partner
Start wherever feels easiest: by message, by phone, or by booking a slot. In all three, the area partner replies directly. No escalation, no commitment. Indicative fees before any meeting.
We'll connect you with the right specialist automatically.
2How would you like to start?
Four details and we take it from there. The area partner replies by email. Confidential under professional secrecy.
Next step
The first meeting is free of charge. Choose a time that suits you and you will receive the confirmation by email.
The first meeting is free of charge. You can book it now from our diary.
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How we work
What happens from the moment you hit "book" to having an actionable answer.
Email with calendar invite, location, Google Meet link, and a one-click reschedule option.
If you provided context, they arrive having read it, with specific questions ready.
No script. The area specialist tells you what they would do, what they would avoid, and what they would prioritise.
If we move forward, a written proposal with the fee and the first-year total before we start. If not, you leave with a clear perspective. No pressure.
Who handles your case
When you book, the responsible area partner takes on your case directly. The same person who signs the opinion is the one who picks up the phone. No associate assignment, no intermediate team.
Tax practice
Tax audits, wealth planning, international taxation, non-residents, and crypto.
REAF · 22+ yrs · ES · EN · DE
Legal practice
Corporate law, M&A, due diligence, complex contracts, real estate, and high-value litigation.
ICAM · 18+ yrs · ES · EN
Operations practice
Fractional CFO, senior accounting, compliance, GDPR, and process architecture for scaling businesses.
Auditor · 15+ yrs · ES · EN
We introduce the responsible partner in the first conversation. Conflict-of-interest screening before accepting any case. Professional confidentiality from the first email.
Why clients choose us
Senior boutique: the independence and rigour of a large firm, without the machinery, without the handoffs, and without the structural overhead of paying for junior pyramids.
Large firm
Senior boutique
Volume
Not sure where your business stands? to find out.
Confidentiality · conflicts · fees
Three questions every boutique client asks, and that almost no firm answers in writing on their website.
Covered by professional confidentiality from the first email, before signing any engagement, before we accept the case. We do not retain sensitive data if we do not take on the matter. ICAM Art. 32 · REAF code of ethics.
Systematic conflict-of-interest screening before accepting any case. If we detect a conflict, we return your enquiry without retaining any information. Team segregation between offices for sensitive mandates.
The first meeting is free. Before we start, we send a written proposal with the fee + VAT and the first-year total. Monthly retainers (self-employed or company) run for a minimum of 12 months; one-off engagements are paid once. Starting prices at /en/fees/.
A question that isn't here? : professional confidentiality from the first email.
Our offices
Spain, Andorra and Gibraltar. The first meeting, with the specialist in your area, is by Google Meet.
C/ Castelló 36, Planta 1, 28001 Madrid
Plaça de Catalunya 1, 4ª planta
C/ de les Barques 2, 2ª planta
Av. Perfecto Palacio de la Fuente 1
Avda. Marqués de los Vélez 13, entresuelo, 30008 Murcia
Plaza de la Solidaridad 12, planta 5, 29002 Málaga
Av. Ricardo Soriano 72, Edif. Golden B, 1ª planta, 29601 Marbella
Plaza de Villasís 2
C/ Olof Palme 28, 35007 Las Palmas de Gran Canaria
Carrer Monsenyor Palmer 1, Palma
Andorra la Vella · by appointment
Gibraltar · by appointment
Ceuta · by appointment
Melilla · by appointment
Ready to start? Book your complimentary call by Google Meet above.