"Autónomo" is Spain's term for a registered self-employed individual. If you plan to invoice clients directly — whether that's freelance design work, consulting, or running a one-person online business — rather than working through an employer, this is generally the registration route Spanish authorities expect you to use. It is separate from incorporating a limited company (an S.L.), and separate from being an employee under a work visa.
Who needs to register as autónomo
Broadly, anyone habitually carrying out an economic activity in Spain on their own account needs to register, including:
- Freelancers and consultants invoicing Spanish or foreign clients while living in Spain
- Remote workers who are self-employed (not payrolled) under a digital nomad visa
- Small business owners who have not incorporated a separate legal entity
- Sole proprietors running e-commerce or services from Spain
Note that this is different from being an employee of a foreign company who has simply relocated — that arrangement typically has its own visa and tax pathway and does not require RETA registration in the same way.
Register your activity code (epígrafe) carefully — picking the wrong one is one of the most common reasons autónomos overpay quarterly IVA or miss deductions they're actually entitled to.
Registration steps
- Obtain your NIE and, if required, your TIE — foundational identification numbers for any tax or legal registration in Spain. See our guide to the NIF number for how this connects to your tax ID.
- Register with the tax authorities (Modelo 036/037) — this declares your economic activity and applicable tax obligations, including whether you charge IVA (Spanish VAT) on invoices.
- Register with Social Security (RETA) — the special regime for self-employed workers, which sets your monthly contribution.
- Start invoicing and filing quarterly returns — autónomos file quarterly IRPF income tax prepayments and, where applicable, quarterly VAT returns, plus an annual reconciliation.
Monthly Social Security contributions (RETA)
Spain's RETA system charges autónomo contributions based on estimated net income bands, with monthly quotas that increase as declared income rises. On top of the standard bands, most new autónomos are eligible for the tarifa plana — a flat reduced monthly contribution, historically around €80 per month, available for the first 12 months and extendable for a further 12 months if net income stays below the minimum wage threshold. This can mean roughly two years at a significantly reduced rate before contributions scale up to income-based bands.
| Situation | Approximate monthly contribution |
|---|---|
| Tarifa plana (first 12 months, new registrants) | Flat reduced rate, roughly €80/month base plus a small surcharge |
| Tarifa plana extension (months 13–24, if income stays low) | Same flat reduced rate, subject to income conditions |
| Standard income-based bands (after tarifa plana ends) | Scales with your declared net income bracket — can range from roughly €200 to over €500/month |
Eligibility for the tarifa plana generally requires that you are registering as autónomo for the first time, or have not been registered in the two years prior. Some regions offer additional reimbursements on top of the national discount. Quotas and bands are set annually — always confirm current figures with Seguridad Social (opens in new tab) before budgeting.
Tax obligations once registered
As an autónomo, you are taxed under Spain's standard progressive IRPF income tax scale rather than any flat-rate regime (the Beckham Law generally does not apply to self-employment income). You will typically need to:
- File quarterly IRPF prepayments (Modelo 130) as advance income tax
- File quarterly VAT/IVA returns (Modelo 303) if your activity is subject to VAT
- File an annual income tax return (Renta) each spring covering worldwide income if you are Spanish tax resident
- Keep formal invoicing and bookkeeping records, since Spain's tax authority can request supporting documentation
US freelancers especially underestimate this: autónomo income is reportable on your US return too, alongside whatever Spain collects. Plan for both filings from day one, not as an afterthought. RETA contribution bands → (opens in new tab)
Notes for US and UK freelancers
US citizens who become autónomo in Spain should be aware that self-employment income may also trigger US self-employment tax considerations alongside ordinary income tax, and that RETA contributions are not automatically creditable against US Social Security under the limited US-Spain totalization framework — this is a genuinely technical area worth reviewing with a cross-border preparer. UK nationals should note that Brexit changed how UK and Spanish social security systems coordinate — cross-border arrangements now run through the UK-EU Trade and Cooperation Agreement's social security protocol rather than the automatic EU-wide rules that applied before 2021, so how National Insurance and RETA contribution history interact is a case-specific question best confirmed with a specialist rather than assumed. Both groups should also review ongoing FATCA/HMRC-equivalent reporting — see our guide on FATCA and Spanish tax residency for the US side.