Working as a self-employed individual – an autónomo – is one of the most common ways to work legally in Spain. Over 3.4 million people are registered as autónomos, roughly 16% of the workforce. That figure includes everyone from bar owners and tradespeople to freelance developers and remote-working consultants.
If you’re planning to freelance or run a solo business in Spain, the autónomo system is almost certainly the route you’ll take. It’s straightforward in principle but involves a series of registrations, ongoing tax filings, and social security obligations that catch many newcomers off guard.
This guide walks you through every step – from getting your NIE to filing your quarterly taxes – so you know exactly what to expect.
Note: This guide is for people already legally residing in Spain. If you need a visa first, see our guide to Spanish visa options, including the Spain digital nomad visa.
Step 1: Get your NIE (foreigner identification number)
The Número de Identificación de Extranjero (NIE) is your gateway to almost everything official in Spain. You need it before you can open a bank account, sign a rental contract, register for taxes, or set up as autónomo.
EU/EEA citizens can apply directly at a local police station (comisaría) or the immigration office (Oficina de Extranjería). You’ll need your passport or national ID card, the EX-18 form (not the EX-15, which is for non-EU nationals), and proof of why you need the number – such as a work contract or intention to register as self-employed.
Non-EU citizens will typically receive their NIE as part of their residency or work permit application.
In practice, getting an appointment can take weeks in popular areas like Barcelona or Madrid. Many people use a gestor (administrative agent) to secure an appointment faster or to handle the paperwork on their behalf.
Digital certificate – don’t skip this
While you’re sorting your NIE, apply for a digital certificate (certificado digital) from the FNMT (Fábrica Nacional de Moneda y Timbre). This electronic ID lets you file taxes, access your social security records, and handle most government business online. Without it, you’ll be queuing at offices for things that should take five minutes. You can start the process at sede.fnmt.gob.es and then verify your identity at a local office.
Step 2: Register with Social Security (RETA)
All self-employed workers in Spain must enrol in the Régimen Especial de Trabajadores Autónomos (RETA) through the Tesorería General de la Seguridad Social (TGSS). You can register online through the Social Security portal (Import@ss) once you have your digital certificate, or in person at a local office.
Your RETA registration date is when your social security obligations begin – including monthly contributions and access to public healthcare, pension accrual, and other benefits. Once registered, you can apply for your SIP health card at your local centro de salud, and also the Tarjeta Sanitaria Europea (European Health Insurance Card) for coverage across the EU.
Important timing note: You must register with RETA before you start working. Backdated registrations can trigger penalties.
Step 3: Register with Hacienda (tax authority)
To declare your business activity and fulfil your tax obligations, you need to register with Hacienda (the Spanish Tax Authority, AEAT) by submitting Modelo 036.
This form declares:
- Your business activity (using IAE codes – Impuesto sobre Actividades Económicas)
- Whether you’ll charge IVA (VAT)
- Your tax obligations (quarterly income tax, VAT returns, etc.)
You’ll need to choose the right epígrafe (activity code) for your profession. If you’re not sure which one fits, ask your accountant – getting this wrong can cause problems down the line.
Understanding your Social Security contributions
The income-based system
Spain introduced an income-based contribution system for autónomos in 2023, replacing the old model where freelancers could simply pick an arbitrary contribution base. Your monthly social security payment is now determined by your actual net income, spread across 15 tramos (income brackets).
For 2026, the government froze quotas at 2025 levels after failing to reach agreement with freelancer associations on proposed increases. Monthly contributions currently range from roughly €200–230/month for the lowest earners (under €670/month net) to around €530–590/month for those in the highest bracket (over €6,000/month net). The government had proposed significantly higher rates (up to €796/month at the top bracket), but these were shelved pending further negotiation.
On top of your base contribution, the Mecanismo de Equidad Intergeneracional (MEI) – an intergenerational equity surcharge – adds 0.9% in 2026 (up from 0.8% in 2025). This is calculated automatically by Social Security.
You declare your expected income when you register, and you can adjust it up to six times per year as your earnings change. At year-end, the system reconciles your actual income against your contributions and you’ll either owe more or receive a refund.
For context on the proposed future rates and how Spain compares to other European countries, see our analysis of Spain’s 2026 autónomo rates.
Tarifa plana: the startup discount
New autónomos can benefit from the tarifa plana – a reduced flat-rate contribution of approximately €80/month for the first 12 months. If your net income stays below the minimum threshold, this can be extended for a further 12 months – giving you up to two full years at the reduced rate.
Key conditions:
- You must not have been registered as autónomo in the previous 2 years – or 3 years if you previously claimed the tarifa plana
- It’s not available to autónomos colaboradores (family members working in the same business)
- You must apply for the extension during month 11 of your first year – it’s not automatic
- Regional extensions may apply – some comunidades autónomas offer additional discounts
The tarifa plana makes the first year significantly more affordable, but plan ahead for the jump in costs once it expires.
Tax obligations: IRPF and IVA
Personal income tax (IRPF)
As an autónomo, you pay Impuesto sobre la Renta de las Personas Físicas (IRPF) on your net business income. For the full picture on filing your annual return, see our guide to the income tax return in Spain. Spain uses progressive tax bands – these are the general national rates for 2026:
| Taxable Income | Rate |
|---|---|
| Up to €12,450 | 19% |
| €12,450 – €20,200 | 24% |
| €20,200 – €35,200 | 30% |
| €35,200 – €60,000 | 37% |
| €60,000 – €300,000 | 45% |
| Over €300,000 | 47% |
Important: IRPF is split between a state component and a regional component, and each comunidad autónoma can adjust its regional portion. This means your effective rate may differ depending on where you’re registered. For example, Madrid tends to have slightly lower combined rates, while Catalonia is at the higher end. The difference can amount to several thousand euros per year at higher income levels – so factor in your region when planning.
As an autónomo, you pay 20% quarterly on your net business income (income minus expenses) through Modelo 130. These payments are counted towards the annual personal income tax (declaración de la renta) which every autónomo – and every employee in Spain – is obliged to submit, between April and June for the previous calendar year. Overpayments are refunded or shortfalls collected.
Deductible expenses include things like internet, coworking space, professional subscriptions, equipment, and a proportion of home office costs – but the rules on what qualifies (and how much) are strict. Keep receipts and records for everything.
Value added tax (IVA)
Most autónomos must charge IVA at 21% (the standard rate) on invoices to Spanish clients, then file a quarterly return via Modelo 303. Reduced rates of 10% and 4% apply to certain goods and services – your accountant can advise whether any of your activities qualify. You offset the IVA you’ve paid on business expenses against what you’ve charged clients.
If you primarily invoice clients outside Spain but inside the European Union – and these clients are other freelancers or companies – those services are typically exempt from Spanish IVA under the reverse charge mechanism. These operations must still be included in your Modelo 303 quarterly return, and you will also need to file Modelo 349 (intra-community operations summary).
If your invoices go to companies outside the European Union, they are also VAT exempt, but must still be reported in your Modelo 303.
If your output IVA is regularly less than your input IVA – common for freelancers serving international clients – you’ll accumulate a credit that can be reclaimed, usually on the annual summary return (Modelo 390).
Invoicing and record keeping
VeriFactu: Spain’s new digital invoicing system
Spain is rolling out VeriFactu (Sistema de Facturación Verificado) – a mandatory system requiring all businesses to use AEAT-certified invoicing software that creates tamper-proof, digitally signed invoices with QR codes for instant verification.
The original deadline was mid-2026, but the government postponed implementation via Royal Decree 15/2025 in December 2025. The current deadlines are:
- January 1, 2027: Companies (SLs and other corporate entities)
- July 1, 2027: All freelancers and autónomos
What VeriFactu means in practice:
- No more invoices created in Word, Excel, or basic templates
- Every invoice carries a digital signature and QR code
- Invoices cannot be altered after creation (corrections require a formal rectification)
- A complete audit trail is maintained automatically
Penalties for non-compliance will be severe – up to €50,000 per year for using uncertified software, and €10,000 per non-compliant B2B invoice.
The postponement gives freelancers breathing room, but don’t wait until the last minute. Migrating from your current invoicing system takes time, and VeriFactu-compliant software is already available. Read our detailed guide to VeriFactu for the full background and what to look for in compliant software.
General record-keeping requirements
Spanish law requires autónomos to maintain accurate records of all income, expenses, and invoices for at least four years. Each invoice must include:
- Your name, NIE/NIF, and address
- The client’s name and tax ID
- A sequential invoice number
- A clear description of the service or product
- The tax base, IVA rate, and total amount
- IRPF retention (if applicable to Spanish clients)
Staying on top of this is non-negotiable. Poor records don’t just risk fines – they make your annual tax return a nightmare and can trigger inspections.
Penalties for non-compliance
Spain’s tax authority does not take a relaxed approach to non-compliance. Common penalties include:
- Late RETA registration: Backdated contributions plus surcharges
- Late tax filings: Surcharges of 5–20% depending on delay, plus interest
- Underreporting income: Fines of 50–150% of the underpaid amount
- VeriFactu violations (from 2027): Up to €50,000/year for non-certified software
- Failing to issue proper invoices: Per-invoice penalties
It’s also worth knowing that Hacienda often identifies problems years after they occur – and the fines accumulate with interest. Prevention is dramatically cheaper than cure.
Getting help: you don’t have to do this alone
The administrative burden of being autónomo in Spain is real. Between quarterly tax filings, social security adjustments, upcoming VeriFactu requirements, and the inevitable trámites (bureaucratic procedures), most freelancers find they need professional support – and that’s completely normal. Even Spanish nationals routinely use accountants and gestores for this.
For remote workers and international freelancers in particular, platforms like Xolo are designed to handle the heavy lifting – from invoicing and expense tracking to quarterly filings and social security management. If you invoice international clients, a multi-currency account like Wise can save you significant amounts on currency conversion and international transfers. Having the admin and payments taken care of means you can focus on the work that actually earns you money, rather than getting lost in Modelo numbers.
Whatever route you choose, the key is to get proper support early. The cost of a good accountant or management platform is almost always less than the cost of a single penalty from Hacienda.
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Quick reference: your autónomo checklist
- Get your NIE – and apply for a digital certificate at the same time
- Register with RETA (Social Security) – before you start working
- Register with Hacienda – Modelo 036, choosing the right activity code
- Set up VeriFactu-compliant invoicing – mandatory from July 2027 (start preparing now)
- File quarterly: Modelo 130 (IRPF) + Modelo 303 (IVA) – every January, April, July, October
- File annually: Declaración de la renta (April–June) + Modelo 390 (IVA summary)
- Keep records for at least 4 years
- Review your contribution bracket regularly – adjust via Import@ss up to 6x per year
Spain is a fantastic place to build a freelance career – the lifestyle, the cost of living in many areas, and the growing remote work culture make it genuinely attractive. But the admin side requires respect. Get it right from the start, and you’ll save yourself enormous stress (and money) down the line.
Related reading: For a broader overview of living and working in Spain, see our Spain country guide. Need a digital-first gestoría to handle your autónomo admin? See our Xolo partner page. If you’re still sorting out your visa, talk to our immigration partner Richelle de Wit.
This guide reflects regulations and rates current as of March 2026. Spanish tax and social security rules change frequently – contribution rates, VeriFactu timelines, and tarifa plana conditions have all been revised multiple times in recent years. Always verify current figures with a qualified professional or the relevant government portal before making decisions based on this information.
