Overview: Spanish Entrepreneurs in the US Market
Barcelona and Madrid are Spain's main tech hubs with companies like Glovo, Cabify, Wallbox, and Typeform. Spain's startup law (Ley de Startups) provides tax incentives for new businesses. Spanish entrepreneurs form US LLCs for SaaS, marketplace, and tourism tech.
However, operating a US business entity from Spain comes with specific IRS obligations that many entrepreneurs initially overlook. The US-Spain tax treaty provides important benefits, but understanding how to properly leverage these while maintaining compliance is essential.
Key Takeaway
Spanish citizens and residents owning US LLCs or corporations must file US tax returns annually, even if the business has no US income or operates at a loss. The US-Spain tax treaty can significantly reduce your tax burden when properly applied.
US Tax Requirements for Spanish Business Owners
As a Spanish entrepreneur with a US business entity, your tax obligations depend on your company structure, income sources, and whether you qualify as a US tax resident.
Form 5472 Requirements
Form 5472 (Information Return of a 25% Foreign-Owned U.S. Corporation) must be filed annually by any US corporation or LLC that is at least 25% foreign-owned and has "reportable transactions" with foreign related parties.
For Spanish entrepreneurs, reportable transactions typically include:
- Capital contributions: Any money transferred to your US company
- Loans: Funds borrowed from or lent to the company
- Service payments: Fees for services between you and the company
- Rent or royalties: Payments for intellectual property or equipment
- Sales of goods: Any inventory or assets sold between related parties
Even a single-member LLC with no business activity must file Form 5472 if there was any transaction between you (the foreign owner) and the LLC during the tax year.
Important: Formation Services Don't Handle Compliance
If you formed your US LLC through Stripe Atlas, Firstbase, doola, or similar services, you still have Form 5472 filing obligations. These services help with formation but typically don't handle ongoing IRS compliance.
Form 1120 Requirements
Foreign-owned disregarded entities (single-member LLCs) must file a pro-forma Form 1120 along with Form 5472. C-Corporations and LLCs electing corporate taxation must also file Form 1120 annually, even with zero income.
ITIN Application Process
An Individual Taxpayer Identification Number (ITIN) is required for Spanish citizens who need to file US tax returns but don't qualify for a Social Security Number.
| Feature | NIF/NIE (Número de Identificación Fiscal) | US ITIN |
|---|---|---|
| Purpose | Spain tax identification | US tax identification for non-residents |
| Format | Letter + 7 digits + letter | 9 digits (9XX-XX-XXXX) |
| Issued by | AEAT (Agencia Estatal de Administración Tributaria) | Internal Revenue Service (IRS) |
| Processing time | Varies | 7-11 weeks typically |
Pro Tip: Passport Verification
Rather than sending your original passport to the IRS, use a Certifying Acceptance Agent (CAA) who can verify your identity documents. This is faster, safer, and doesn't require you to be without your passport for weeks.
US-Spain Tax Treaty Benefits
The US-Spain tax treaty provides reduced withholding rates on certain types of income, offering significant savings compared to the standard 30% rate.
| Income Type | Standard US Rate | Treaty Rate |
|---|---|---|
| Dividends (substantial holdings ≥10%) | 30% | 5% |
| Dividends (portfolio) | 30% | 15% |
| Interest | 30% | 0% |
| Royalties | 30% | 5% |
Key treaty benefits for Spanish entrepreneurs:
- Reduced dividend withholding: 5% for substantial holdings, 15% for portfolio dividends (vs 30% standard)
- Zero withholding on interest: 0% instead of the standard 30%
- Reduced withholding on royalties: 5% instead of 30%
- Business profits exemption: Spanish residents generally aren't taxed on US business profits without a US permanent establishment
Claiming Treaty Benefits
To claim treaty benefits, provide Form W-8BEN (individuals) or W-8BEN-E (entities) to the payer, referencing the US-Spain treaty. Incomplete forms can result in full 30% withholding.
Spain Tax Considerations
Spanish entrepreneurs with US entities must also consider their domestic tax obligations:
- Corporate tax rate: 25%
- Worldwide taxation for: Worldwide taxation for residents
- Beckham Law provides: Beckham Law provides flat 24% tax for qualifying new residents (6 years)
- Modelo 720 requires: Modelo 720 requires declaration of foreign assets over €50,000
- CFC rules apply: CFC rules apply
- Modelo 100 for: Modelo 100 for personal income tax (IRPF).
Modelo 720 Required
Spain requires declaration of foreign assets exceeding €50,000 via Modelo 720. This includes US LLC ownership, bank accounts, and other financial assets. While penalties were reduced after EU court ruling, filing is still mandatory.
Important Tax Deadlines
| Deadline | Filing Requirement | Notes |
|---|---|---|
| April 15, 2025 | Form 1120 & 5472 | For calendar year corporations |
| June 15, 2025 | Extended deadline for foreign filers | Automatic 2-month extension |
| June 30 | Spain tax return | June 30 (IRPF personal income tax) |
| September 15, 2025 | Extended US returns | With Form 7004 filed |
Automatic Extension Available
Foreign-owned corporations automatically receive a 2-month extension (to June 15) for filing. You can request an additional extension to September 15 by filing Form 7004 before April 15. However, any tax owed is still due by April 15.
Penalties for Non-Compliance
- Form 5472 penalty: $25,000 per form, per year for failure to file or filing an incomplete return
- Continued failure: Additional $25,000 for each 30-day period of non-compliance after IRS notice
- Form 1120 penalties: 5% of unpaid tax per month, up to 25% maximum
- Accuracy-related penalties: 20% of any underpayment due to negligence
Penalty Example
A Spanish entrepreneur who fails to file Form 5472 for three years could face $75,000 in penalties ($25,000 x 3 years), regardless of whether the business made any money.
State Tax Considerations
| State | State Income Tax | Annual Fee | Key Benefits |
|---|---|---|---|
| Delaware | None for out-of-state | $300/year | Business-friendly courts, established case law |
| Wyoming | None | $60/year | Lowest fees, strong privacy |
| New Mexico | None for out-of-state | $0/year | No annual report |
US Banking for Spanish Entrepreneurs
Opening a US bank account is essential for operating your US business. Here are your main options:
Online-First Banks:
- Mercury: Popular with international founders, remote application available
- Relay: Accepts foreign-owned LLCs with straightforward process
Fintech Alternatives:
- Payoneer: Popular for international payments and transfers
- Wise Business: Popular for international payments and transfers
- Revolut: Popular for international payments and transfers
- N26 Spain: Popular for international payments and transfers
Common Mistakes to Avoid
- Ignoring Form 5472: Many Spanish entrepreneurs don't realize this form exists until receiving an IRS notice
- Missing the initial filing: Your first tax return is due even if you formed your LLC late in the year
- Not keeping transaction records: You must document all transactions between yourself and your US company
- Assuming "no income = no filing": Zero-income companies still have filing obligations
- Not claiming treaty benefits: Many Spanish entrepreneurs pay more withholding tax than necessary
- Forgetting state requirements: Annual reports and franchise taxes vary by state and have separate deadlines
- Not reporting locally: Failing to report US income on your Spain tax return
- Incorrect W-8BEN forms: Filing improper forms can result in unexpected withholding
Getting Professional Help
US tax compliance for Spanish entrepreneurs requires expertise in both IRS requirements and Spain's tax system. Look for professionals who understand:
- Foreign-owned US entity compliance (Form 5472, Form 1120)
- The US-Spain tax treaty and its implications
- Spain domestic tax reporting requirements
- Transparent pricing and year-round support
Need Help with Your US Tax Filing?
We specialize in helping Spanish entrepreneurs navigate US tax compliance. Our team understands the unique challenges of operating between Spain and the US.
Schedule a Free Consultation