Autónomo Registration Support for US & UK Freelancers
Becoming autónomo (self-employed) is how most freelancers, consultants, and solo founders legally invoice clients from Spain. Here's what registration involves and what it costs on an ongoing basis.
We confirm your visa authorizes self-employed activity, file your Modelo 036/037 with Hacienda, register you with RETA social security, and secure the tarifa plana discount where you qualify.
Overview
"Autónomo" is Spain's legal status for self-employed individuals — roughly equivalent to a sole proprietor in the US or a self-employed sole trader in the UK, though with a distinct social security and tax structure. If you plan to invoice clients, run a freelance practice, or operate a small business from Spain without incorporating a company, autónomo registration is generally the route into the system.
Registration itself is administrative, but it triggers two ongoing obligations that catch many new arrivals off guard: a monthly social security contribution (RETA) that is due regardless of how much you actually earn that month, and quarterly tax filings with Hacienda. Neither is optional once you're registered, and both continue until you formally deregister.
Who This Applies To
| Situation | Autónomo relevance |
|---|---|
| US or UK remote worker with a foreign employer | Usually not applicable directly — you may remain an employee abroad, though some visa categories (like the Digital Nomad Visa) permit limited Spanish-client freelance work alongside foreign employment |
| US or UK freelancer/consultant relocating with Spanish or international clients | Typically registers as autónomo to invoice legally and pay into the Spanish system |
| Small business owner not ready to incorporate | Autónomo is generally the lower-overhead alternative to forming an SL company — see Company Registration for comparison |
| Beckham Law applicants | Standard autónomo status is generally excluded from the Beckham Law regime; only certain digital nomad visa holders and highly qualified professionals may combine self-employment with Beckham Law eligibility — see Beckham Law |
Registration Requirements
- NIE number — required before any tax or social security registration. See NIE Number.
- Appropriate residence status — non-EU citizens generally need a visa or permit that authorizes self-employed activity (this is not automatic on every visa type).
- Registration with Hacienda — via Modelo 036 or 037, declaring your business activity (epígrafe) and tax obligations.
- Registration with Social Security (RETA) — the self-employed regime, which sets your monthly contribution base.
- Digital certificate or Cl@ve — needed to file electronically with Hacienda and Social Security.
Social Security Contributions (RETA)
Since the contribution reform, monthly RETA payments are based on your estimated net income bracket rather than a flat fee for everyone. Contributions for 2026 are broadly frozen at 2025 levels and range from roughly the low €200s per month at the lowest income brackets up to around €600 per month at the highest, including the mandatory intergenerational equity mechanism (MEI) surcharge.
New autónomos can generally apply for the tarifa plana — a sharply reduced flat contribution of roughly €80–90 per month — for the first 12 months, extendable for a second year if net income stays below the minimum wage threshold. Eligibility generally requires not having been registered as autónomo in the prior two years (three years if you previously used the tarifa plana). Some autonomous communities (Andalusia, Madrid, Murcia among them) have offered additional first-year subsidies on top of the national discount — regional rules change, so this should be confirmed at registration time.
Process
- Confirm your NIE and that your residence permit or visa authorizes self-employed activity in Spain.
- Choose your business activity code (epígrafe) — this affects your IVA/VAT treatment and withholding obligations.
- File Modelo 036/037 with Hacienda to register the activity.
- Register with Social Security (RETA), selecting your contribution base and confirming tarifa plana eligibility.
- Set up quarterly filing obligations: IVA (Modelo 303), income tax withholding/payment on account (Modelo 130), and the annual return.
Ongoing bookkeeping is a practical necessity once registered — see Monthly Accounting & Bookkeeping. If your clients are outside Spain, you may also need to register for intra-EU or export invoicing — see VAT/IVA & ROI Registry.
Costs
| Item | Typical range |
|---|---|
| Spain Relocation — autónomo registration service | Quoted individually — see Pricing |
| Official RETA social security (tarifa plana, year 1) | Roughly €80–90/month (subject to annual adjustment) |
| Official RETA social security (standard bracket) | Roughly €200–600+/month depending on declared net income bracket |
| Modelo 036/037 registration itself | No government filing fee; cost comes from professional preparation |
FAQ
Do I have to pay the monthly social security fee even if I earn nothing that month?
Generally yes — RETA contributions are due monthly regardless of invoiced income, which is one of the most common surprises for new autónomos. This is why confirming steady income potential (or planning around the tarifa plana period) before registering matters.
Can I be autónomo and employed at the same time?
Yes, this is called pluriactividad — combining employed and self-employed status. It affects how contributions and some deductions are calculated, and is worth structuring correctly from the start rather than adjusting after the fact.
What's the difference between autónomo and forming a company (SL)?
Autónomo has no legal separation between you and the business — you're personally liable, and profits are taxed as personal income under IRPF. An SL (Sociedad Limitada) is a separate legal entity taxed under corporate tax rules, generally makes more sense above a certain income level or with liability concerns. See Company Registration for a comparison.
How long does registration take?
Once your NIE and residence status are confirmed, Hacienda and Social Security registration itself is typically completed within days, since both are largely online processes. The longer lead time is usually obtaining the NIE and, for non-EU citizens, confirming your visa authorizes self-employed activity.
US Does registering as autónomo affect my US tax filing or FBAR obligations?
Registering as autónomo doesn't change your US filing status, but it does add complexity: self-employment income earned in Spain is generally reportable on your US return, and you may need to consider the Foreign Earned Income Exclusion, Foreign Tax Credit, and — separately — self-employment tax treatment under the US-Spain totalization agreement. If your Spanish business bank account balances exceed the relevant thresholds, FBAR and potentially Form 8938 (FATCA) reporting apply in addition to your Spanish obligations. This is an area where US and Spanish self-employment tax rules interact in non-obvious ways, so a review with a preparer familiar with both systems is worthwhile.
UK If I deregister as a UK sole trader and register as autónomo, what does HMRC need to know?
You should notify HMRC when you stop UK self-employment and when your UK tax residency status changes, since continuing to file UK self-assessment returns as if still trading in the UK can create confusion or duplicate reporting. Once Spanish tax resident, self-employment income is taxed in Spain, with the UK-Spain treaty addressing double-taxation risk on any UK-source income that continues. This transition is worth planning with an advisor rather than handling retroactively at year-end.
Ready to register as autónomo?
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