Tax risks of having an LLC while living in Spain: What the Spanish Tax Agency won't forgive in 2026

The tax risks of having an LLC while living in Spain are much greater than most entrepreneurs and digital nomads imagine. The Spanish Tax Agency detected 977 "opaque" bank cards linked to foreign accounts, resulting in tax liquidations of 21.6 million euros, and LLC holders operating with cards associated with accounts like Mercury or Wise are now one of its priority targets. If you have an LLC in the United States and reside in Spain, this article is for you.

Key Takeaways: The essentials about the tax risks of an LLC in Spain

Why are the tax risks of having an LLC while living in Spain so severe in 2026?

In 2026, the Spanish Tax Agency is not the passive institution it was a decade ago. With advanced technological resources, automatic exchanges of tax information with more than 100 countries, and new real-time invoicing systems, the Tax Agency has more capacity than ever to detect irregular structures.

The narrative that "with a US LLC you pay no taxes in Spain" circulates massively in forums and social media. But this claim is, at best, incomplete and, at worst, an invitation to unintentional tax evasion with very serious consequences.

Understanding the tax risks of having an LLC while living in Spain is not optional: it is the difference between an efficient and legal structure, and a debt with the Tax Agency that can multiply years of supposed "savings".

Risk #1: Tax transparency of the LLC and direct attribution to personal income tax (IRPF)

The first and most common of the tax risks of having an LLC while living in Spain is so-called tax transparency. The North American IRS treats single-member LLCs as "disregarded" or pass-through entities, meaning their profits are directly attributed to the partner.

The Spanish Tax Agency uses the same criterion. If you are a tax resident in Spain and the sole partner of an LLC, 100% of the LLC's profits are considered your personal income, regardless of whether you have withdrawn them or left them in the company account.

• The profits are taxed under personal income tax (IRPF) as economic activity income or capital income.
• The marginal rate can reach 47% for incomes exceeding €300,000.
• A Spanish self-employed worker with €60,000 in income already bears an effective tax and social security contribution burden of 41%, which makes the promise of "0% with LLC" fiscally unviable if the correct structure does not exist.
• Failing to declare these returns is equivalent to tax evasion, with surcharges and interest on the undeclared amount.

"The LLC is not a tax shield for residents in Spain. It is a powerful legal tool, but its efficiency absolutely depends on how it is structured and managed from the perspective of residency and international taxation."

Risk #2: The place of effective management and the tax risks of an LLC managed from Spain

One of the least known but most devastating tax risks of having an LLC while living in Spain is the concept of place of effective management. According to Spanish regulations and double taxation treaties, a company is considered a tax resident in Spain if the key management and direction decisions are made from here.

This means that, even if your LLC is registered in Delaware, New Mexico, or Wyoming, if you manage it from Spain through meetings, emails, signed contracts, or simply from your computer, the Spanish Tax Agency can reclassify it as a Spanish company.

The consequences are direct and serious:

1. The LLC becomes subject to the Spanish Corporate Tax (25%) on all its profits.
2. Obligations to file tax returns in Spain are generated (Form 200 and others).
3. The Tax Agency can claim all unpaid taxes from the moment the effective management was established in Spain, along with the corresponding surcharges and interest.
4. The difference between the tax you owed and the one you paid can turn into a very high debt in just a few years of activity.

Risk #3: Form 720 and penalties for failing to declare assets abroad

The Form 720 is the informative declaration on assets and rights located abroad that every Spanish tax resident with assets outside the country exceeding €50,000 is required to file. An LLC and its associated bank accounts fall directly under this obligation.

Many LLC owners are unaware of this obligation or ignore it, thinking that "since the account is in the name of the American company, I don't have to declare it." This mistake can cost very dearly.

• The failure to file Form 720, or its incorrect or late filing, can generate formal fines of up to €20,000 for each data group (accounts, real estate, securities).
• If the Spanish Tax Agency discovers undeclared assets, it can treat them as unjustified capital gains, taxing them at the maximum marginal rate plus a 150% penalty.
• The filing deadline is the first quarter of each year, and filing after the deadline entails additional penalties.
• The obligation exists even if you have not received income: if the LLC has an account balance above the threshold, you must declare it.

This is one of the tax risks of having an LLC while living in Spain that most surprises entrepreneurs who discover its existence after years of activity. Our specialists in international tax advisory help you regularize your situation before the Tax Agency detects it.

This infographic presents the three key tax risks of having an LLC for residents in Spain. Useful for understanding tax obligations and compliance.

Risk #4: The 183 days and how the Spanish Tax Agency verifies your tax residency in 2026

Many LLC owners believe that by simply not registering in the municipal census (empadronamiento) or spending long periods outside Spain, they can avoid Spanish tax residency. In 2026, this strategy is extraordinarily risky.

The 183-day rule remains the main criterion, but the Tax Agency now has access to data that was previously inaccessible. The automatic exchange of tax information (CRS/FATCA) combined with internal data allows the Spanish Tax Agency to build a profile of real presence in Spain with great precision.

Among the data that the Spanish Tax Agency can cross-reference to prove your residency are:

• Flight records and migratory movements at Spanish airports.
• Card payments in businesses, restaurants, and transport in Spain.
• Mobile data and roaming consumption on Spanish networks.
• Subscriptions to digital services (Netflix, Spotify, gyms) with a Spanish address.
• Activity in food delivery apps, taxis, or similar platforms.
• Enrollment of children in schools or use of healthcare services in Spain.
• Electricity, water, or gas consumption in Spanish properties.

If the Tax Agency proves that you have spent more than 183 days in Spain, or that your "center of economic and family interests" is in Spain, you are a tax resident regardless of what your municipal census certificate says. This is one of the tax risks of having an LLC while living in Spain most difficult to manage without expert advice.

Risk #5: The digital trail of your LLC's bank cards in Spain

The bank cards associated with accounts like Mercury, Relay, or Wise linked to your US LLC are one of the clearest pieces of evidence that the Tax Agency can use to prove your activity and residency in Spain.

As we have mentioned, the Tax Agency has already acted forcefully in this area. "Opaque" cards linked to foreign accounts are a consolidated and expanding inspection vector.

• Each transaction with the LLC card in Spain is recorded and can be cross-referenced with your income tax return.
• If you use the LLC card for personal expenses in Spain, the Tax Agency can treat those amounts as payments in kind or profit distributions, imputing them to you as income.
• Mixed expenses (personal and business) in the same LLC account are a red flag for any inspection.
• The incompatibility between declared income and the level of spending observed in Spain can trigger a wealth inspection.

The solution is not to stop using the card, but to correctly structure the collections and payments of the LLC with the help of advisors specialized in international tax management for LLC owners.

Risk #6: The Verifactu system and real-time digital invoicing in 2026

In 2026, the Verifactu system represents a qualitative leap in the Tax Agency's ability to control economic activity in Spain. This system obliges business owners and freelancers operating in Spain to issue invoices through certified software that transmits the information to the Spanish Tax Agency in real time.

For LLC owners who invoice from the United States but provide services or sell to clients in Spain, the implications are direct:

• If you have Spanish clients and do not use invoicing compliant with Spanish regulations, the discrepancy between the income detected in the LLC account and the invoicing registered in Spain becomes an automatic red flag.
• The Tax Agency can cross-reference your LLC's income (obtained via FATCA/CRS) with the invoicing registered in Verifactu to detect undeclared income.
• Companies and freelancers working with you in Spain may be required to report their payments abroad, creating an information chain that is difficult to avoid.

This specific 2026 tax risk especially affects those who offer digital services, consulting, marketing, or software development from their LLC to companies or individuals based in Spain.

Risk #7: Economic penalties for tax non-compliance in Spain

One of the elements that turns the tax risks of having an LLC while living in Spain into a real financial threat is the applicable penalties. The Spanish tax penalty regime is one of the most demanding in Europe.

The economic consequences of not correctly managing your LLC as a resident in Spain may include:

The Tax Agency recovered 18.9 billion euros in inspections in the last analyzed fiscal year, with a 13% increase, and investigations into large fortunes increased by 40% with 1,264 new files opened. Many LLC owners fall into this category due to their global turnover volumes.

Risk #8: IRS forms and transnational compliance

The tax risks of having an LLC while living in Spain are not limited to obligations with the Spanish Tax Agency. There is also an American compliance dimension that many LLC owners ignore or manage incorrectly.

If your LLC has activity with non-residents or receives payments from outside the United States, there are specific obligations with the IRS that, if not properly met, generate automatic fines and enormously hinder your position in the face of a Spanish tax inspection:

• The Form 5472 must be filed when a single-member foreign-owned LLC performs certain reportable transactions. The penalty for non-filing amounts to $25,000 per year.
• The Form 1120 as a corporate tax return must accompany the 5472 even when the LLC is a "disregarded entity".
• Incorrect or late filing of these forms can be interpreted as a lack of tax diligence and reinforce the Spanish Tax Agency's position in an inspection.
• Proper compliance in the US is, paradoxically, one of the best defenses against the Spanish Tax Agency in Spain.

At EluTax we manage the filing of Forms 5472 and 1120 with the IRS to guarantee complete compliance in both countries, definitively eliminating this risk vector.

How to mitigate the tax risks of an LLC while residing in Spain?

Knowing the risks is the first step. The second, and most important, is acting with a solid and documented tax strategy. This is not about tax evasion: it is about correctly structuring your activity within the current legal framework.

These are the fundamental measures to reduce the tax risks of having an LLC while living in Spain:

1. Tax residency analysis: Accurately determine whether or not you are a tax resident in Spain, and act accordingly from day one.
2. Correct LLC structure: Choose the appropriate state of incorporation (Delaware, New Mexico, Wyoming) and the optimal corporate structure for your situation.
3. Compliance with Form 720: File the informative declaration on time and correctly every year you exceed the established thresholds.
4. Correct personal income tax (IRPF) declaration: Include the LLC's earnings in your Spanish tax return appropriately, applying double taxation treaties when applicable.
5. Separation of personal and business expenses: Maintain separate accounts and document all LLC activity with proper invoices and contracts.
6. US compliance: File Forms 5472 and 1120 correctly every year.
7. Ongoing international tax advisory: Rely on experts who monitor regulatory changes in Spain and the US and update your tax strategy regularly.

Our plans for tax advisory for residents in Spain with an LLC cover all these aspects, with options ranging from a one-time session with a junior expert (starting around €99) to full annual support (starting around €999 per year).

Our services to correctly manage your LLC's tax risks in Spain

At EluTax we have over 8 years of experience specializing in LLC taxation for US non-residents and European entrepreneurs operating with American structures. We are your strategic ally to navigate the complex international tax environment legally and efficiently.

Our services are specifically designed to eliminate the tax risks of having an LLC while living in Spain:

If you already have an established LLC and need to know your actual tax situation in Spain, the best starting point is our FAQ guide on US LLCs for residents in Spain, where we resolve the most common doubts directly.

You can also contact our team to schedule a 10-minute call and evaluate your case with no obligation.

Conclusion: The tax risks of having an LLC while living in Spain are manageable, but cannot be ignored

The tax risks of having an LLC while living in Spain they are real, growing in 2026, and affecting thousands of entrepreneurs, freelancers, and digital nomads who trusted incomplete or downright wrong information. The good news is that, with the right structure and proper advice, an LLC can continue to be a valid and efficient tax tool even as a resident in Spain.

What is not acceptable, neither fiscally nor legally, is ignoring obligations with the Tax Agency or trusting that "no one will find out." In 2026, the Tax Agency has more data, more technology, and more resources than ever to detect irregular structures.

The difference between paying what is owed efficiently and facing an inspection with years of accumulated debt, surcharges, and penalties is called professional tax planning. And that is exactly what we offer at EluTax.

If you want to understand your real situation, regularize it before the Tax Agency acts, or simply structure your LLC the right way from the beginning, our team is ready to accompany you. Discover our complete LLC service and take the first step toward solid, legal, and efficient international taxation.

Guaranteed Savings. But only when the tax structure is well built. Contact us and we'll do it together.

The right way to do the alternative? If you really want to lower your tax bill, the lever is residency, not the company. We tell you about an option within the EU in taxes and tax residency in Cyprus.