Strategy
M&A, capital markets, and strategic advisory for transformative deals.
View all StrategyData rooms and transactions. The analysis and the recommendation are signed by the people on the team.
Discover BMC One Strategy Log in to BMC OneFree first meetingBy video call
Tax
Structuring, planning, and compliance across jurisdictions.
View all TaxForms 720 and 721
Filing period from 1 January to 31 MarchForms 720 and 721
The filing period ends on 31 MarchTax authorities, deadlines and powers of attorney. Our team prepares, files and responds.
Discover BMC One Tax Log in to BMC OneFree first meetingBy video call
Legal
End-to-end legal counsel to protect and advance your business interests.
View all LegalSignatures, case files and deadlines. A BMC team handles every matter, with in-house legal counsel on the legal side; in BMC One you see its phases and the status of each one.
Discover BMC One Legal Log in to BMC OneFree first meetingBy video call
Operations
Outsourced finance, people, and governance so you can focus on growth.
View all OperationsAccounting, invoices, bank statements and payroll. Our team books, calculates and submits.
Discover BMC One Business Services Log in to BMC OneFree first meetingBy video call
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
A BMC team handles every matter, with in-house legal counsel on the legal side; 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 dedicated servers in Germany. 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.
Practical tools
42 practical tools: tax calculators, regulatory compliance tests, up-to-date guides and checklists. All aligned with current Spanish and EU legislation for 2026.
Tax simulators, fiscal calendars and guides updated to 2026 Spanish and EU regulations.
Calculate your Spanish income tax (IRPF) with 2026 updated brackets. Includes state and regional deductions.
Open tool → CalculatorEstimate your tax savings under the special inpatriate regime (flat 24% rate).
Open tool → CalculatorOn the digital nomad visa: calculate the saving from combining it with the Beckham regime (flat 24%). Annual and 6-year savings.
Open tool → CalculatorCalculate the municipal capital gains tax (plusvalía) on your property transfer.
Open tool → CalculatorSimulator for the Wealth Tax and Solidarity Tax on Large Fortunes.
Open tool → CalculatorCalculate non-resident property tax in Spain: imputed income, rental income and capital gains.
Open tool → CalculatorDo you need to declare foreign bank accounts, securities or real estate? Check the €50,000 per-category threshold and the re-declaration rule.
Open tool → CalculatorDo you need to declare your foreign crypto holdings? Check if you exceed the €50,000 threshold.
Open tool → CalculatorEstimate Spanish inheritance tax (ISD) by autonomous community, kinship and inherited amount. Includes current regional bonifications.
Open tool → CalculatorCalculate Spanish IRPF on your crypto capital gains (savings base 19%–30%), with FIFO method and loss offsetting.
Open tool → CalendarAll key dates to meet your tax obligations throughout 2026.
Open tool → GuideTaxation, visa and obligations for digital nomads choosing Spain as their base.
Open tool → CalculatorGeneral, micro and small-company rates: calculate your Spanish corporate income tax with 2026 rates.
Open tool → CalculatorWhen do Verifactu and mandatory B2B e-invoicing apply to you? Get your dates by profile.
Open tool → CalculatorIRPF on the savings base from selling property, shares or funds: 19%–30% brackets.
Open tool → CalculatorEstimate your 2025 income tax return result: refund or amount payable.
Open tool → CalculatorCompare the taxation of a US LLC under the Beckham regime vs ordinary taxation.
Open tool →Employment calculators, working hours simulators and team management tools.
Calculate the final settlement and outstanding amounts at the end of a contract.
Open tool → CalculatorTotal cost of an employee for your company including employer social security.
Open tool → CalculatorCalculate compensation for fair, unfair or collective dismissal based on seniority and salary.
Open tool → CalculatorSimulator for the new income-based social security contribution system for self-employed workers.
Open tool → CalculatorWhat the 37.5-hour working week (proposal, not approved; the legal maximum is still 40 hours) would cost your business.
Open tool → CalculatorFrom gross to net: IRPF withholding and social security to know your real monthly salary.
Open tool →Self-assessment tests and guides for GDPR, AI Act, NIS2 and Whistleblowing compliance.
10-question self-assessment: discover your GDPR compliance level and what needs improvement.
Open tool → Self-AssessmentDoes your company use artificial intelligence? Assess your compliance with the EU AI Regulation.
Open tool → Self-AssessmentCheck if your company complies with Spain's Law 2/2023 on whistleblower protection.
Open tool → GuideLegal obligations for remote work: agreement, expenses, digital disconnection and time tracking.
Open tool →Comparators, checklists and guides for starting a business, forming companies and accessing public grants.
Compare the tax burden and advantages of operating as a freelancer or through a limited company.
Open tool → ChecklistEvery step, document and cost to form a Spanish Limited Company (SL) in 2026.
Open tool → GuideStatus of the Kit Digital calls as of 9 November 2026, what Orden TDF/39/2026 means, and what the calls offered.
Open tool → GuideTax and corporate benefits under Law 28/2022 for the promotion of the emerging company ecosystem.
Open tool → CalculatorEstimate your company's value using EBITDA multiples by sector and size.
Open tool → CalculatorCalculate the IRPF taxation on the sale of your shares or business.
Open tool → ComparisonCompare the taxation of investing through a holding company vs directly.
Open tool →Tax residency guides, Golden Visa alternatives and Special Territory opportunities.
Criteria, documentation and deadlines to correctly establish your tax residency in Spain.
Open tool → GuideWhat the NIE is, who needs it and how to get it in Spain or from abroad: appointment, form EX-15 and fee 790/012. NIE, NIF and TIE explained.
Open tool → GuideThe Golden Visa was abolished in April 2025. Discover alternative residency-by-investment pathways.
Open tool → GuideCanary Islands Special Zone: 4% corporate tax rate with deadline December 2026. Window of opportunity.
Open tool → CalculatorCalculate how much you would save by taxing at 4% in the ZEC vs the standard corporate tax rate.
Open tool → CalculatorFull cost breakdown when buying property in Spain: ITP/VAT, notary, registry, legal fees and more.
Open tool → CalculatorAnswer a few questions to find the Spanish visa or residence permit that fits your profile: digital nomad, non-lucrative, entrepreneur and more.
Open tool → CalculatorNet rental yield for non-residents: IRNR on property rented out in Spain.
Open tool →Reply by email · no commitment