Spain is the fourth-largest economy in the eurozone and one of the most active destinations for foreign direct investment in Europe. Its legal system, EU membership, extensive tax treaty network, and gateway position between European and Latin American markets make it a logical base for entrepreneurs, holding structures, and international operating companies. Registering a company in Spain is a well-defined process — but it involves multiple administrative steps, requires fluency in Spanish commercial law, and carries specific obligations that differ meaningfully from common-law jurisdictions. This guide covers every stage of the process in practical detail, updated for 2026 regulations.
Whether you are a US or UK entrepreneur establishing a European subsidiary, a non-EU national setting up under Spain’s Startup Law, or a foreign company opening a Spanish operating entity, the same core framework applies. Understanding it before you start saves time, avoids costly corrections, and ensures your company is correctly configured for the tax and regulatory environment from day one.
Why form a company in Spain?
Before addressing the mechanics, it is worth understanding what the Spanish legal and commercial framework offers that makes it attractive for foreign entrepreneurs.
EU single market access. A Spanish company is an EU-domiciled entity. It can invoice across 27 EU member states under unified commercial law, access EU funding programmes, benefit from EU-wide data protection and consumer protection frameworks, and bid on European public procurement without the market-access restrictions that apply to non-EU companies.
Competitive corporate tax rates. The standard Corporate Income Tax (Impuesto sobre Sociedades, IS) rate is 25%. New companies pay a reduced rate of 15% for the first two tax periods in which they generate a taxable base — effectively, the first two profitable years. Startups certified under the Ley de Startups (Law 28/2022) pay 15% from incorporation, subject to additional requirements.
ZEC regime in the Canary Islands. The Zona Especial Canaria offers a reduced IS rate of 4% for qualifying activities in Las Palmas and Santa Cruz de Tenerife, subject to employment and investment commitments. The ZEC registration deadline for new entrants runs to 31 December 2026, making this a time-sensitive opportunity for certain business models.
Beckham Law (Régimen especial de trabajadores impatriados). Foreign professionals relocating to Spain can apply for the Beckham Law regime, capping their Spanish personal income tax at a flat 24% on Spanish-source income up to €600,000. This affects the personal tax planning of foreign founders and key employees who become Spanish tax residents, and is a separate consideration from corporate structuring.
Latin American gateway. Spain’s cultural, linguistic, and legal proximity to Latin America — combined with its EU status — makes it the preferred European hub for companies with operations or customers across both regions.
Extensive tax treaty network. Spain has signed double taxation treaties with over 90 countries, including the US, UK, Germany, China, Mexico, Brazil, and all major investment jurisdictions. This matters significantly for holding structures, royalty flows, and dividend repatriation.
Choosing your legal form: SL vs SA
The two main legal forms for trading companies in Spain are the Sociedad de Responsabilidad Limitada (SL) and the Sociedad Anónima (SA). They are governed by the same statute — the Ley de Sociedades de Capital (LSC), consolidated in Royal Decreto Legislativo 1/2010 — but differ in important ways.
Sociedad Limitada (SL)
The SL is the Spanish equivalent of a limited liability company (LLC in the US, Ltd in the UK, GmbH in Germany, SARL in France). It accounts for over 95% of new company formations in Spain.
Key features:
- Minimum share capital: €1 under the Ley Crea y Crece (Law 18/2022), though in practice most founders capitalise at €3,000 or more for credibility with banks and counterparties. Companies capitalised below €3,000 face reinforced profit retention obligations until equity reaches that threshold.
- Shareholder liability: Limited to the amount subscribed. Shareholders are not personally liable for company debts beyond their capital contribution.
- Share transfers: Restricted by default. The articles of association and the LSC impose pre-emption rights. SL shares are not freely transferable without following a prescribed procedure, which makes the SL unsuitable as a publicly traded vehicle but ideal for closed-group ownership structures.
- Governance: Managed by one or more administrators (administradores) — a sole administrator, joint administrators, or a board of directors. No minimum number of shareholders.
- Annual accounts: Must be filed at the Mercantile Registry within seven months of the financial year end. Audit is mandatory once two of the three size thresholds are exceeded for two consecutive years: total assets above €2.85M, turnover above €5.7M, or average employees above 50.
The SL is the right choice for most foreign entrepreneurs establishing an operating company, subsidiary, or holding structure in Spain.
Sociedad Anónima (SA)
The SA is the Spanish equivalent of a public limited company (PLC in the UK, AG in Germany, SpA in Italy). It is used primarily for large companies, listed entities, regulated businesses (banks, insurance companies, investment firms), and companies with complex share capital structures.
Key differences from the SL:
- Minimum share capital: €60,000, at least 25% (€15,000) paid up at incorporation.
- Share transfers: Freely transferable by default, making the SA suitable for external investors, stock option plans, and eventual listing.
- Governance: Mandatory board of directors for publicly listed SAs; optional for others. More formal governance requirements than the SL.
- Audit: Mandatory from incorporation for certain regulated activities; the same size thresholds as the SL otherwise apply.
For the vast majority of foreign entrepreneurs and companies setting up in Spain, the SL is the appropriate vehicle. The SA is warranted only when you anticipate raising capital from a broad investor base, operating in a regulated sector requiring an SA, or planning a Spanish stock exchange listing.
Other legal forms
Spain also recognises the Sociedad en Comandita, Sociedad Colectiva (unlimited partnerships, rarely used), Agrupacion de Interes Economico (AEI, economic interest groupings), and European legal forms (SE, SCE). For foreign companies not wishing to incorporate a subsidiary, a Spanish Branch (Sucursal) is an alternative — the branch is not a separate legal entity and its liabilities extend to the parent, but it avoids double registration and can be quicker to set up for defined project activity.
Documents you need before you start
Gathering the right documents before initiating the registration process avoids delays. The required documents depend on whether the shareholders and directors are individuals (personas físicas) or legal entities (personas jurídicas), and whether they are resident or non-resident in Spain.
For individual shareholders and directors
- Valid passport or national identity document (original, not expired). Non-EU citizens must present a passport; EU citizens may use their national ID card.
- NIE (Número de Identificación de Extranjero) — required for all non-Spanish individuals who will be shareholders or directors. See the NIE section below.
- Proof of address — typically a utility bill, bank statement, or official document showing the individual’s habitual address. Required for the notarial deed and for compliance with anti-money laundering (AML) regulations under Law 10/2010.
- Tax identification number from the home country — required for beneficial ownership declarations.
For corporate shareholders
- Certificate of incorporation or equivalent document from the country of registration, apostilled or legalised and officially translated into Spanish.
- Certificate of good standing or equivalent, confirming the entity is active and in good standing, dated within the last three months.
- Authorisation and certification of the representative — proof that the individual signing on behalf of the entity is authorised to do so (board resolution, power of attorney, or equivalent), apostilled and translated.
- Entity’s tax identification number from its country of registration.
For all founders
- Chosen company name — up to three alternative names in order of preference, for the name availability check.
- Registered address in Spain — the company needs a Spanish registered address (domicilio social) from incorporation. This can be a real office, a serviced address, or a shared registered address provided by an advisor.
- Bank account and capital deposit certificate — once you have opened a bank account in the name of the company being formed and deposited the share capital, the bank issues a certificate (certificado de depósito de capital) confirming the amount deposited in the company’s name. This is a required document at the notary.
The NIE for foreign entrepreneurs
The NIE (Número de Identificación de Extranjero) is the tax identification number assigned to foreign individuals in Spain. It is required for any non-Spanish national who will be a shareholder or director of a Spanish company, regardless of whether they reside in Spain.
The NIE is not the same as residency or a work permit. It is simply a tax identifier, and obtaining it does not imply any obligation to reside in Spain or pay Spanish personal income taxes. However, without a NIE, a foreign individual cannot appear before a Spanish notary as a shareholder or director.
How to obtain a NIE
From outside Spain — apply at the Spanish consulate or embassy in your country of residence. Required documents typically include a completed Form EX-15, a valid passport, two passport-sized photographs, evidence of the reason for the application (a letter explaining you are forming a Spanish company, together with supporting documentation), and payment of the consular fee (approximately €12). Processing times vary by consulate: some issue NIEs within 1-2 weeks; others take 4-6 weeks. Call the consulate before submitting to confirm current processing times and accepted formats.
In Spain — apply at the nearest Extranjería office (foreigner services) or designated police station. You need an appointment (cita previa), which must be booked online through the Spanish Interior Ministry’s system. The same Form EX-15 and supporting documents apply. In-person processing is faster: NIEs issued at Spanish offices are typically available within 1-2 weeks of the appointment.
By power of attorney — if you are not able to travel to Spain and your consulate is slow, you can grant a power of attorney to a Spanish lawyer or advisor who can apply for the NIE on your behalf from within Spain. This is the most common approach for time-sensitive incorporations.
An important practical note: the NIE is a static number assigned once and never changes. It does not expire. Once obtained, it serves all future purposes indefinitely — tax filings, additional company formations, real estate transactions, and any other official act in Spain.
Step-by-step company registration process
The following process describes a standard SL incorporation with two or fewer shareholders. Complex structures (holding companies, multiple shareholders, regulated sectors) require additional steps.
Step 1: Company name availability check (Certificación Negativa de Denominación Social)
Apply to the Registro Mercantil Central (Central Mercantile Registry) in Madrid for a certificate confirming that your chosen company name is not already registered or reserved by another company. You can submit up to five alternative names in order of preference.
The application can be made online through the Registro Mercantil Central’s portal or through your advisor. The certificate is issued within 2-3 business days and is valid for three months from issue. If you do not complete the incorporation within three months, you must renew it.
Common mistake: Submitting only one name option. The Central Registry checks names against its full database of approximately 4.2 million registered Spanish companies. Name conflicts are frequent, especially for generic English-language names. Always submit three or more alternatives.
Step 2: Open a bank account and deposit share capital
You need a Spanish bank account in the name of the company being formed to deposit the share capital. This is a provisional account — it becomes the company’s operating account once the company is incorporated.
Opening a business account for a company under formation is increasingly difficult at major Spanish banks (Santander, BBVA, CaixaBank). They typically require an in-person appointment and impose bureaucratic requirements that can delay the process significantly. Neobanks with Spanish banking licences (Paysera, Holvi) and some regional savings banks (cajas) are more accessible for non-residents and companies under formation.
Once the account is open, deposit the share capital. The bank issues a Certificado de Depósito de Capital — a formal letter on bank letterhead confirming that a deposit of a specified amount has been received in the name of the company. Bring the original of this certificate to the notarial signing.
Timeline: 1-3 business days for the account opening if done in person; longer if documents need to be sent by post.
Step 3: Draft the articles of association (Estatutos Sociales)
The articles of association (Estatutos Sociales) govern the company’s internal operations: corporate purpose (objeto social), share structure, transfer restrictions, governance (type and powers of administration), profit distribution, and dissolution rules.
For a standard SL, the articles must comply with the mandatory provisions of the LSC (which cannot be overridden) while exercising the flexibility the law allows on matters where the founders prefer customised rules.
Key drafting decisions:
- Object clause (objeto social): Define the company’s economic activities using CNAE codes. Overly narrow object clauses restrict what the company can legally do; overly broad clauses can create complications with tax registration and banking.
- Management structure: A sole administrator (administrador único) is simplest for a single-founder company. Joint administrators (administradores mancomunados) require both to sign together for any act; joint-and-several administrators (administradores solidarios) can each act independently. A board of directors adds governance formality but increases administrative complexity.
- Share transfer restrictions: The default LSC rules apply unless modified. If you have co-founders or investors, consider agreed first-refusal rights, tag-along/drag-along provisions, and deadlock resolution mechanisms.
Practical advice: Do not use standard template articles without reviewing them for your specific situation. Standard templates are adequate for simple single-founder structures but create problems for multi-founder companies where governance and exit mechanisms have not been properly addressed.
Step 4: Notarial deed of incorporation (Escritura Pública de Constitución)
All founding shareholders (or their authorised representatives) must appear before a Spanish notary (Notario) to sign the deed of incorporation. The notary verifies the identity of all parties, checks that the legal requirements are met, witnesses the signatures, and produces the original notarial deed.
Documents required at the notary appointment:
- Original company name certificate (Certificación Negativa)
- Original bank capital deposit certificate
- Articles of association (the notary usually prepares these based on your instructions, or incorporates your draft)
- Valid identification documents (passport/NIE) for all shareholders and directors
- Address details for all parties
- If any party appears by power of attorney: the original notarised and apostilled power of attorney
The notarial deed includes: the company name and registered address, the shareholders’ identity and shareholdings, the share capital amount and how it is represented, the articles of association, appointment of the initial administrator(s), and declaration that all requirements of the LSC have been met.
Notary fees are regulated by a government fee scale and are not negotiable. For an SL with €3,000 share capital, expect €300-450. Fees increase with share capital amount.
Step 5: Register with the Tax Agency — obtain NIF and file Form 036
Within one month of signing the deed of incorporation, you must register the company with the Agencia Tributaria (AEAT) — the Spanish tax authority — by filing Form 036 (Declaración Censal).
This filing:
- Assigns the company a definitive NIF (Número de Identificación Fiscal — the corporate tax identification number, also called CIF)
- Registers the company for the applicable taxes: Corporate Income Tax (Impuesto sobre Sociedades), VAT (IVA), and any withholding tax obligations
- Declares the company’s economic activity (epígrafe IAE — Impuesto de Actividades Económicas)
- Declares the registered address and any additional operational addresses
Timeline: The AEAT issues a provisional NIF immediately upon receiving the Form 036, which allows you to open bank accounts and sign contracts. The definitive NIF is issued once the Mercantile Registry inscription is complete (Step 6) and confirmed with the AEAT.
Important: Form 036 also triggers the company’s VAT registration. If the company will carry out exempt activities (certain financial services, healthcare, education) or will be a holding company not making supplies, the VAT registration must be handled carefully. Incorrect VAT registration creates complications that can take months to correct.
Step 6: Register with the Mercantile Registry (Registro Mercantil)
The notarial deed of incorporation must be presented to the provincial Mercantile Registry corresponding to the company’s registered address within two months of signing. In practice, the notary typically handles this electronically on the same day as the signing.
The Mercantile Registry reviews the deed for legal compliance, performs its own checks, and enters the company in the commercial register. Once registered, the company receives its definitive registration number (hoja registral) and the NIF becomes fully definitive.
Timeline: 5-15 business days, depending on the workload of the relevant provincial registry. Madrid and Barcelona tend to be slower (10-15 days); other provinces can be faster (5-8 days). The Registry can reject the deed for formal deficiencies and return it for correction — this can add 1-2 weeks if it occurs.
After registration: The Mercantile Registry publishes the registration in the Boletín Oficial del Registro Mercantil (BORME). This is the official public notification that the company exists. The company’s details are now publicly searchable via the Registro Mercantil’s online portal.
Step 7: Register for Social Security (if hiring employees)
If the company will employ staff, it must register as an employer with the Tesorería General de la Seguridad Social (Social Security Treasury) before the first employee starts work.
This involves:
- Registering the company as an employer (Inscripción de Empresa)
- Assigning a Social Security contribution account code (Código de Cuenta de Cotización, CCC)
- Registering each employee individually under the General Social Security Regime (Régimen General)
A sole director-shareholder who receives a salary (rather than dividends) must also register under the Régimen General or, in specific circumstances, under the RETA (Régimen Especial de Trabajadores Autónomos — self-employed regime). The classification of director-shareholders for Social Security purposes is a nuanced area that changed significantly under the LORESS reform (Law 3/2023). Professional advice is essential to avoid incorrect registration, which creates retroactive contribution liabilities.
Step 8: Open the operational bank account
Once the company has its definitive NIF, the provisional bank account (used for the capital deposit) converts to or is replaced by the company’s operational current account. Most banks require the definitive NIF, the Mercantile Registry inscription certificate, and the notarial deed (or a certified copy) to open or upgrade to a full business account.
Non-resident companies and foreign-owned SLs frequently encounter difficulties opening bank accounts with major Spanish banks, which apply enhanced due diligence procedures under AML regulations. Practical alternatives include: working with a specialist advisor who has existing bank relationships, approaching banks in regions with strong foreign investor communities (Málaga, Barcelona, the Canary Islands), or using neobanks for initial operations while the main bank account is processed.
Cost breakdown
The total cost of incorporating a Spanish SL varies depending on share capital, complexity of articles, and professional advisory fees. The following table reflects a straightforward SL with €3,000 share capital and two shareholders.
| Item | Low estimate | High estimate | Notes |
|---|---|---|---|
| Certificación Negativa | €15 | €20 | Central Mercantile Registry fee |
| Notary fees (deed of incorporation) | €300 | €600 | Government fee scale; increases with capital |
| Registro Mercantil inscription | €150 | €300 | Varies by registry and deed complexity |
| Form 036 registration | €0 | €0 | No fee |
| Share capital deposit | €3,000 | €3,000 | Remains in company as equity |
| Professional advisory fees | €800 | €2,000 | Name check, articles, notary prep, filings |
| NIE (if required) | €12 | €50 | Consular or police fee per individual |
| Apostille / translation (if required) | €100 | €400 | Per document; varies by country |
| Total out-of-pocket (excl. capital) | €1,377 | €3,370 | |
| Total including capital | €4,377 | €6,370 | Capital stays in company |
The share capital of €3,000 is not a cost in the accounting sense — it is equity that remains in the company and can be used for business operations. The true non-recoverable cost of incorporation is the fees column: typically €1,400-3,400 depending on complexity and the advisory firm engaged.
Budget guidance: For a standard two-shareholder SL with standard articles and professional support, budget €4,500-6,000 all-in, including the share capital deposit.
Timeline summary
| Phase | Task | Business days |
|---|---|---|
| Pre-incorporation | NIE application (if needed, from Spain) | 5-15 |
| Pre-incorporation | NIE application (from consulate abroad) | 10-30 |
| Week 1 | Company name certificate | 2-3 |
| Week 1 | Bank account opening + capital deposit | 1-3 |
| Week 1-2 | Articles of association drafting | 3-5 (parallel) |
| Week 2 | Notarial signing | 1 |
| Week 2 | Form 036 / provisional NIF | 1 |
| Week 2-4 | Mercantile Registry inscription | 5-15 |
| After inscription | Definitive NIF confirmed with AEAT | 1-2 |
| Total (resident/NIE holder) | 10-20 business days | |
| Total (non-resident, no NIE) | 3-8 weeks |
For time-critical cases where the company must be operational within 24-48 hours, the alternative is buying a pre-formed shelf company. See our comparative guide on buying a shelf company versus incorporating from scratch for a full analysis.
Tax registration and ongoing obligations
Registering the company with the AEAT via Form 036 is the starting point. Ongoing tax obligations begin immediately once the company is registered. Foreign entrepreneurs who are unfamiliar with the Spanish tax calendar consistently underestimate how demanding the compliance cycle is.
Corporate Income Tax (Impuesto sobre Sociedades)
- Rate: 25% standard; 15% for the first two profitable tax periods (new companies).
- Startup Law rate: 15% from incorporation for certified startups, regardless of profitability.
- Tax year: Calendar year (1 January to 31 December). The company can adopt a different fiscal year, but this is uncommon.
- Annual filing: Form 200, due within 25 calendar days following the sixth month after the fiscal year end — effectively by 25 July each year for calendar-year companies.
- Instalments (pagos fraccionados): Form 202, filed in April, October, and December, based on either the prior year’s tax base or the current year’s accounting result.
Value Added Tax (IVA)
- General rate: 21%. Reduced rates of 10% and 4% apply to specific goods and services.
- Quarterly filings: Form 303, due by the 20th of April, July, October, and January.
- Annual summary: Form 390, due by 30 January.
- Intra-EU transactions: Companies trading with other EU VAT-registered entities must also file Form 349 (Recapitulative Statement of Intra-EU Operations) monthly or quarterly.
- SII (Immediate Information System): Companies with annual VAT invoicing exceeding €6M must file under the SII system, reporting invoices electronically within four days of issue or receipt.
Withholding taxes (Retenciones)
Spain requires companies to withhold tax at source on certain payments:
- Professional services to self-employed: 15% (or 7% for new professionals in their first three years)
- Rental income on commercial property: 19%
- Dividends to shareholders: 19%
- Director remuneration: 35% (subject to reduction based on total income)
Monthly or quarterly withholding filings (Form 111 for employment and professional services, Form 115 for rentals) are mandatory once any withholding obligation arises.
Annual accounts and corporate secretarial
- Annual accounts (Cuentas Anuales): Must be approved at a shareholders’ meeting within six months of the financial year end and filed at the Mercantile Registry within one month of approval — effectively by 31 July each year.
- Board of directors / shareholders’ meetings: Minimum one ordinary annual shareholders’ meeting. Minutes must be recorded, signed, and retained.
- Beneficial ownership register: Annual confirmation of beneficial ownership at the Mercantile Registry (Royal Decree 609/2023, in force since February 2025).
Spain’s Startup Law: key benefits for foreign entrepreneurs
Law 28/2022 (Ley de Fomento del Ecosistema de las Empresas Emergentes), commonly called the Ley de Startups, came into force in December 2022 and introduced a set of measures specifically designed to attract technology companies and innovative startups to Spain. Its provisions are relevant to foreign entrepreneurs establishing new ventures.
Corporate tax benefits
Certified startups pay Corporate Income Tax at 15% — not just for the first two profitable years as under the general new-company regime, but from the moment of certification. The 15% rate applies for the first four years of operation (extended to five years if the company does not achieve profitability in the first four).
Startup certification also allows a zero-advance-payment regime: the company does not pay the IS quarterly instalments (Form 202) during the first two years in which it would otherwise be required to do so, improving cash flow for early-stage companies.
Improved stock option regime
Spain’s historic stock option tax treatment was highly punitive compared to other EU jurisdictions, creating a significant disadvantage in attracting and retaining talent. The Startup Law increased the stock option annual exemption from €12,000 to €50,000 per employee per year and deferred the taxable event from exercise to sale of shares, aligning Spain more closely with the UK’s EMI and Ireland’s KEEP schemes.
Immigration benefits
The Startup Law introduced the Digital Nomad Visa — a specific residency permit for non-EU nationals who work remotely for non-Spanish employers or who work as freelancers (autónomos) with predominantly non-Spanish clients. The visa allows a stay of up to five years and is renewable, with the right to work for Spanish clients (up to 20% of total income) from the third year.
For foreign entrepreneurs establishing Spanish companies, the Entrepreneur Visa (part of the Startup Law’s broader immigration package) allows non-EU nationals to obtain a one-year residency permit to establish an innovative, scalable company in Spain, extendable to three years once the company is operational.
Startup certification
To benefit from these provisions, the company must obtain formal certification as an innovative emerging company from ENISA (Empresa Nacional de Innovación) or another designated body. Certification requires demonstrating that the company has not been operating for more than five years (seven for biotech), has not distributed dividends, is not a spin-off of a larger group (unless the spin-off qualifies independently), and has an innovative or scalable business model.
The certification process takes approximately three months and requires preparation of a detailed application document. BMC’s Startup Package includes the ENISA certification application alongside the company incorporation and tax configuration.
Common mistakes by foreign entrepreneurs
After advising hundreds of foreign-owned Spanish companies, certain patterns of error recur consistently. Awareness of these before you begin saves significant time and cost.
1. Starting the process without a NIE. The NIE is not optional and cannot be bypassed at the notary. Many founders assume they can obtain it quickly; at some consulates, processing takes four to six weeks. Start the NIE application before anything else.
2. Choosing an overly generic company name. Names like “International Consulting SL”, “Tech Solutions SL”, or “Digital Services SL” are almost universally taken or rejected for genericness. The Central Registry applies strict criteria. Prepare distinctive, specific name options.
3. Incorrect object clause. The empresa’s objeto social defines what it can legally do and how it is taxed. A company with a narrow object clause that expands its activities beyond the stated scope faces legal and tax complications. A company with an excessively broad clause can trigger complications with banking (due to AML risk assessment) and VAT registration.
4. Confusing provisional NIF and definitive NIF. The provisional NIF is issued immediately upon Form 036 filing and allows basic operations. However, some banks, large clients, and government entities will not deal with a company on a provisional NIF. Until the Mercantile Registry inscription is complete and the definitive NIF confirmed, the company’s status is incomplete.
5. Not registering for VAT correctly from day one. If the company makes its first VAT-taxable supply before its Form 036 is processed and the VAT registration is active, it is technically in breach of its VAT obligations from the start. File Form 036 as soon as the notarial deed is signed, even before the Mercantile Registry inscription is complete.
6. Underestimating the quarterly compliance burden. A Spanish SL generates at minimum 13-14 mandatory tax filings per year plus annual accounts plus shareholders’ meetings. Foreign entrepreneurs accustomed to lighter compliance regimes (e.g., UK Ltd companies) consistently underestimate this. Budget for an accounting and tax compliance service from day one.
7. Director-shareholder Social Security registration. Spain’s Social Security system has specific and complex rules about when a director-shareholder must register under the General Regime (Régimen General) versus the RETA. Getting this wrong creates retroactive contribution liabilities with penalties and surcharges. This has been an area of active enforcement by Social Security inspectors since 2023.
8. Missing the beneficial ownership declaration. Since February 2025, all Spanish companies must file an annual beneficial ownership declaration with the Mercantile Registry under Royal Decree 609/2023. The first filing deadline was in March 2025. Companies that missed it face administrative sanctions and — more practically — will find their accounts suspended at the Mercantile Registry until the filing is made.
From registration to operational company: what comes next
Completing the registration process is the beginning, not the end. A properly constituted Spanish SL that is ready to trade needs several additional elements that are not part of the registration process itself.
Accounting setup: Spanish accounting law (Plan General de Contabilidad) and tax requirements mandate double-entry bookkeeping from the first transaction. Monthly bank reconciliation, journal entries, and quarterly closing are necessary to produce the tax returns accurately and on time. Set up your accounting system before you start transacting.
Contract templates: Standard Spanish commercial contracts should reflect Spanish law and jurisdiction. Contracts drafted under English or US law are valid between the parties but create complications in Spanish courts if there is a dispute. Have a Spanish lawyer prepare template commercial contracts, NDA, service agreements, and employment contracts before you start signing counterparty documents.
Employment law: If you intend to hire employees, familiarise yourself with Spain’s Employment Statute (Estatuto de los Trabajadores). Spanish employment law is significantly more protective of employees than most common-law systems. Notice periods, severance, working time rules, and collective bargaining agreements (convenios colectivos) apply from the first hire. Mistakes in employment contracts are difficult to correct after the fact.
Compliance calendar: Create a compliance calendar for the first twelve months covering all quarterly VAT returns, withholding filings, IS instalments, annual accounts deadlines, shareholders’ meetings, and beneficial ownership filings. Missing deadlines triggers automatic surcharges and penalties.
BMC’s Startup Package
BMC provides a comprehensive end-to-end company formation service for foreign entrepreneurs and companies establishing in Spain. Our Startup Package is designed for founders who want the process handled correctly from start to finish without having to navigate Spanish bureaucracy independently.
The package covers the full company registration process — name certificate, articles of association drafting, notarial coordination, Mercantile Registry filing, Form 036 tax registration, and bank account introduction — together with ENISA startup certification application (for qualifying companies), initial tax configuration for both corporate and director-shareholder personal tax obligations, Social Security registration, and a twelve-month compliance calendar.
You work with a single point of contact across legal, tax, and accounting. We manage all deadlines, liaise with the notary and registry on your behalf, and ensure the company is correctly configured for the tax environment from day one. For non-resident founders, the full process — including NIE application by power of attorney — can be completed without requiring travel to Spain.
Explore our company formation service and our full Startup Package for scope, timeline, and pricing. If you have a specific situation — regulated sector, multi-shareholder structure, holding company, or Startup Law certification — book a free initial consultation with our legal team. We will assess your structure, identify any sector-specific requirements, and give you a clear roadmap before you commit to anything.
