Self-employed in Spain vs US LLC: the real structure decision

If you invoice international clients from Spain, a US LLC can give you stronger banking, privacy, tax architecture and a more professional operating base than the classic autónomo route.

If you invoice outside Spain, staying as a sole trader can limit margin, banking and privacy; a properly designed LLC unlocks global invoicing, US banking and conditional US federal treatment when there is no ECI and the file is documented.

If you're a freelancer or sole trader billing international clients, whether you file as a US Schedule C sole proprietor, a UK sole trader, a Canadian self-employed worker, an Australian sole trader, or a Spanish autónomo, you already know how quickly income tax, self-employment tax, and social contributions eat into what you keep. A US LLC owned by a non-resident offers a very different structure. We use the Spanish autónomo regime as the reference point in this article because it's one of the most punitive, but the logic applies anywhere a freelancer is getting hit with high marginal rates and fixed social contributions. Here's an honest, detailed comparison with real numbers.

The autónomo burden today

The Spanish autónomo system was designed for a neighborhood bakery, not for a UX designer working with startups in San Francisco. Yet thousands of digital freelancers keep paying as if they were selling bread.

Let's do the real math. Suppose you bill €5,000/month (€60,000/year):

• Autónomo social security contribution: ~€300/month (~€3,600/year with the new income-based system)
• IRPF: Between 24% and 37% on your net profit (progressive rates from 19% to 47%)
• IVA (VAT): 21% that you collect and then pay quarterly (but generates massive paperwork. Modelo 303, Modelo 130, Modelo 190, Modelo 347...)

The result: from those €60,000, you might keep €32,000-38,000 after taxes. Nearly half is gone.

The worst part is not the amount itself; it is that you do not have to pay that much.

Why the autónomo model fails digital freelancers

• The contribution is effectively fixed: you pay even if you don't bill. With the new income-based system, your contribution rises when you do well. The structure can discourage growth instead of supporting it.
• IRPF is progressive and relentless: above €35,000 you're already at the 37% bracket. Above €60,000, you reach 45%. Above €300,000, it hits 47%.
• Quarterly advance payments: every quarter you pay 20% of your estimated profit to Hacienda. Advancing money before you know if you've actually earned it.
• IVA on international operations: a bureaucratic labyrinth. Reverse charge? Modelo 349? OSS? Most people get it wrong.
• Zero asset protection: if your business has a legal problem, your personal assets respond. Your house, your savings, everything.
• Quarterly model filing obligations: Modelo 303 (VAT), Modelo 130 (IRPF advance), Modelo 111 (withholdings), annual summaries. Every quarter, without fail, on penalty of fines. Exentax gives the obligation a named owner, a due date and supporting evidence.

The US LLC alternative

A US LLC is not the only alternative, but for digital freelancers with international clients, it's the most efficient:

• conditional US federal treatment (as a Disregarded Entity with a non-resident owner)
• You declare in Spain only the net profits (after legitimate business expense deductions)
• Access to US banking and payment tools (Mercury, Stripe, PayPal US)
• Complete asset protection: your personal assets are separated
• No fixed monthly contribution: there's no equivalent of the autónomo quota

How the savings actually work: pass-through taxation

Your LLC as a non-resident Disregarded Entity works with pass-through taxation:

1. Your LLC invoices your international clients: in USD via Stripe, wire, or ACH
2. Your LLC pays operational expenses: software, tools, services, subscriptions
3. Your LLC may owe conditional US federal treatment: zero
4. You receive net profits: via Owner's Draws to your personal account
5. You declare in Spain only the net profits, on a significantly reduced taxable base

The deductible expenses you can only dream about as autónomo

With an LLC, you can deduct as operational expenses everything that is "ordinary and necessary" for your business:

• Your entire tech stack: hosting, domains, APIs, SaaS, AI tools
• Hardware: computer, monitor, headphones, microphone, camera
• Training: courses, bootcamps, conferences, technical books
• Business travel: flights, hotels, per diems (for client meetings, industry events)
• Coworking or home office: percentage of rent if you work from home
• Communications: internet, phone, VPN
• Professional services: accounting, tax advisory, insurance
• Banking fees: they depend on the current provider route and must be validated before use

Example with real numbers

Gross income: €72,000/year

LLC deductible expenses: €18,000/year (software, hardware, training, travel, professional services)

Net profit (pass-through): €54,000/year

Tax burden in Spain on €54,000: ~€12,000 (effective rate ~22%)

Total paid: €12,000 + €1,500 (LLC maintenance) = €13,500 → 18.75% effective rate

As autónomo: €72,000 - limited expenses = taxable base ~€62,000

IRPF ~35%: ~€21,700 + autónomo contribution €3,600 = €25,300 → 35.1% effective rate

Difference: €11,800/year more in your pocket. Every year. And the difference grows the more you bill.

The autónomo contribution: a fixed cost that is hard to sustain

The autónomo quota is an anomaly in Europe: you pay a fixed amount each month regardless of whether you bill or not. With the new income-based system, the quota increases as you earn more — the system literally penalizes success.

Meanwhile, with a US LLC, there is no equivalent US federal monthly contribution for simply existing as a business. That does not automatically remove Spanish Social Security if you live and work habitually in Spain; the RETA point is reviewed through residence, real activity and local rules.

"Is this legal?"

Yes. Completely: a US LLC is a business structure recognized internationally. It's not an opaque offshore in the Cayman Islands; it's a company registered in a US state, with an EIN (tax number), Registered Agent, and annual filings with the <a href="https://www.irs.gov" target="_blank" rel="noopener">IRS</a>.

The key is having the structure properly set up and complying with your tax obligations in Spain. That's where the difference between doing it right and doing it wrong lies. Spanish tax resolution <a href="https://petete.tributos.hacienda.gob.es" target="_blank" rel="noopener">DGT</a> V0290-20 addresses the treatment of income from foreign entities for Spanish tax residents.

Do I need to cancel my autónomo registration?

It depends on your situation. There are cases where it makes sense to maintain autónomo registration in Spain and operate the LLC in parallel. In others, it makes sense to deregister. There's no universal answer — it depends on:

• Your billing volume
• The percentage of international vs. domestic clients
• Your personal situation (accumulated contributions, benefits, etc.)
• Whether you're planning a tax residency change in the medium term
• Your need for Spanish public healthcare through social security contributions

The real cost of doing nothing

Every year you continue as autónomo without optimizing your structure, you leave €8,000-20,000 on the table that you could be saving legally. In five years, that's €40,000-100,000.

The fintech stack that makes it all work

FAQ on Self-employed in Spain vs US LLC

Can I be autónomo AND have a US LLC at the same time?

Yes. Many of our clients maintain autónomo registration for domestic clients while using the LLC for international billing. The two structures can coexist.

Will I still have Spanish healthcare (<a href="https://www.seg-social.es" target="_blank" rel="noopener">Seguridad Social</a>)?

Only if you maintain autónomo contributions. If you deregister as autónomo, you lose access to the Spanish public healthcare system through Social Security. Some clients switch to private health insurance.

Do I need to tell Hacienda about my LLC?

Yes. You must declare the LLC's profits in your IRPF return and report the LLC as a foreign asset in Modelo 720 if applicable (assets > €50,000). Full transparency is required, and it's what makes the structure legal.

How do I convert USD to EUR without losing money on exchange rates?

Use Wise Business. The typical EUR/USD conversion costs 0.4-0.6% at the mid-market rate. Compare this to Spanish banks charging 2-4% markup plus wire fees of €15-50.

Can I deduct the autónomo contribution from my LLC profits?

No. The autónomo contribution is a Spanish Social Security payment, not an LLC business expense. However, it is deductible against your IRPF in Spain.

What if I have domestic Spanish clients too?

You can bill domestic clients through your autónomo registration and international clients through your LLC. This hybrid approach is common and perfectly legal when properly structured.

The real cost of doing nothing: a 5-year projection

These figures assume €72,000/year billing and grow proportionally with income. At €120,000/year, the five-year savings exceed €100,000.

To keep going on this thread, <a href="/en/blog/us-llc-for-non-residents-real-pros-and-limits">Advantages and disadvantages of a US LLC for non-residents: honest analysis</a> and <a href="/en/blog/estonian-company-vs-us-llc-22-tax-cfc-and-banking">Why not to open an Estonian company: the US LLC wins for most non-residents</a> fill in nuances this guide only touched on.

If you are comparing Spanish self-employment with a US LLC, the useful next step is to quantify the real operating burden: taxes, contributions, invoicing, banking, compliance and where the work is actually managed. Only then does the structure stop being a slogan and become a decision.

Compare the owner's tax position, not the labels

The autónomo-vs-LLC comparison reads more usefully when it's treated as a profile-based exercise: the same comparison can land differently for two profiles that differ in billing volume, geographical mix of clients, frequency of distributions and complexity of the operating chain. Reading the comparison without the profile in mind tends to push the conclusion toward whichever option is louder in general discussion.

A useful approach is to define three profiles — low, medium, high billing — and walk the comparison through each, recording for each profile which structure emerges as more efficient. This profile-based view replaces the impression of a single answer with a small map that survives the first real year.

How to capture the per-profile result in a short note

The per-profile result captures more durably in a short, dated note that lists, for each profile, the structure that emerged as more efficient and the two or three reasons that drove that conclusion. This note then serves as a reference whenever the actual profile shifts in a later year, so the full comparison doesn't need to be rebuilt from scratch.

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For the autonomo-versus-LLC decision, legitimacy is measured in operating facts: where clients are located, how services are delivered, which entity invoices, where money lands and how the Spanish return explains the profit. The LLC helps only if those facts are coherent.