The full guide
A gestor is lovely to have, but you don’t need one to become autónomo. The whole registration is online and free, and it takes an afternoon if you have the right logins. This guide takes you through it in order, then shows you the quarterly routine that keeps you out of trouble.
Should you do it yourself?
A gestor typically charges €50 to €100 a month to handle your registration and quarterly returns. Over a year that’s €600 to €1,200, roughly what your social security costs on the flat rate in your first year.
For a simple setup, doing it yourself is very manageable: one activity, clients who pay you by invoice, no employees. Once you’re registered, it’s an hour or two each quarter. You’ll also understand your own numbers, which is worth a lot when you’re setting your prices.
It’s not for everyone. If you’ll have employees, sell physical products to consumers across the EU, or have income in several countries, a good gestor earns their fee. Plenty of people register themselves and only bring in help later, which is a perfectly good middle ground.
What you need before you start
Permission to be self-employed. EU citizens can work as autónomos freely. If you’re from outside the EU, your residence permit has to allow self-employment (cuenta propia).
Your NIE and a Spanish social security number.
A digital certificate from the FNMT, or Cl@ve. The certificate is the better option: it works everywhere, including the free online entrepreneur service (PAE).
A bank account for the monthly social security direct debit.
A realistic estimate of your monthly net income. You’ll need it to pick your social security bracket.
On the digital nomad visa? You can freelance, but you’ll usually need to register as autónomo too, unless you stay in your home country’s social security under an agreement with Spain. Our digital nomad visa guide covers the visa side.
Step 1: Register with Hacienda (form 036)
Your first stop is the Tax Agency, before your start date. Form 037, the old simplified version, was scrapped in February 2025, so ignore any guide that tells you to use it. Everything now goes through form 036, and the easiest way to fill it in is Censos WEB, a guided assistant on the Tax Agency’s e-office that asks plain questions and fills in the form for you.
The choices that matter:
Your activity code (IAE epígrafe). Professional codes cover things like design, consulting, translation and development. Business codes cover trading and most hands-on services. If you’re unsure, use the Tax Agency’s IAE search tool.
Your start date. Use the same date for Hacienda and social security.
VAT. Most freelancers are in the general regime and charge 21%. Some health and teaching activities are exempt.
Income tax. Choose simplified direct assessment (estimación directa simplificada), the normal choice for new freelancers.
The intra-EU operators register (ROI). Tick it if you’ll invoice businesses in other EU countries. Without it, you can’t apply the reverse charge.
When you submit, download the receipt. That PDF is your proof of registration with Hacienda.
Step 2: Register with social security
Next is Import@ss, social security’s online portal. Choose “Alta en trabajo autónomo”. You can do this up to 60 days before your start date, but never after it. Registering late can cost you the flat rate and add surcharges, so this is the one deadline you can’t miss.
In the same application you’ll:
Enter your expected monthly net income, which places you in one of 15 brackets.
Claim the flat rate (cuota reducida) if you qualify. You ask for it here, not later.
Choose a mutua, the insurer that covers your sick leave and work accidents.
Give a bank account for the monthly direct debit.
What it costs: the flat rate and the brackets
If you haven’t been autónomo in the last two years (three if you’ve had the flat rate before), you pay €80 a month for your first 12 months. In 2026 the real figure is €88.64, because of a small pension surcharge called the MEI. If your net income stays below the minimum wage, you can ask to extend it for another 12 months.
After that, your payment depends on your real net income, across 15 brackets. In 2026 the minimum payments run from about €206 a month in the lowest bracket to just over €600 in the highest. You can change your bracket up to six times a year, and once Hacienda has your tax return, social security checks your real income. If you paid too little, you’ll get a bill. If you paid too much, they refund the difference.
Also check whether your region offers a cuota cero. Madrid, Andalucía and several other regions refund some or all of the flat rate to new autónomos, each with its own application window.
Invoicing: what every invoice needs
A number in a continuous sequence, with no gaps.
The date, your full name, NIE or NIF and address, plus your client’s name, tax ID and address.
A description of the service, the price before tax, and the VAT rate and amount.
Income tax withholding (retención) when you invoice a Spanish business or professional: 15%, or 7% in the year you start and the next two.
For business clients in other EU countries: their VAT number, no Spanish VAT and a note that the reverse charge applies. For clients outside the EU, services usually carry no Spanish VAT.
Tell your Spanish clients in writing that you’re new, or they’ll have to withhold 15% instead of 7%.
If you use invoicing software, it will have to meet the new Verifactu rules. The legal date for autónomos is currently 1 July 2027. In October 2026 the government announced it will move to October 2028, but that change still has to be published in the BOE. Choose a tool that already complies and you won’t have to think about it.
Your quarterly routine
Four times a year, you file and pay:
Form 303, VAT: the VAT you charged minus the VAT you paid on business costs. File it even in a quarter with no income.
Form 130, income tax: 20% of your profit for the year so far, minus what you’ve already paid. You can skip it if at least 70% of your income has tax withheld by your clients.
Form 349, only if you invoiced businesses in other EU countries or bought services from them.
The deadlines are 1–20 April, 1–20 July and 1–20 October, plus 1–30 January for the last quarter. Each year you also file form 390, the VAT summary, in January; form 347 in February if you did more than €3,005.06 of business with any one client or supplier; and your Renta between April and June.
Our autónomo tax calendar has every date in one place.
Keeping records
Keep a record of every invoice you issue and receive, plus your expenses, as you go. A spreadsheet is fine. Business expenses are only deductible with a proper invoice in your name, not a till receipt, so ask for one every time. If you work from home, you can deduct 30% of your utility bills in proportion to the space you use for work.
Keep everything for at least four years, which is how long Hacienda can review a tax year. Six is safer.
The trap nobody mentions: notifications
As an autónomo, social security contacts you electronically, and the Tax Agency may too. An unopened notification counts as delivered after 10 days, deadlines and all. Sign up for email alerts in DEHú, the government’s notification inbox, and check it regularly.
Free help when you get stuck
Points of Attention for Entrepreneurs (PAE): free offices, plus an online version, that can register you with Hacienda and social security in one go.
The Tax Agency’s phone line and its online assistants for the census and VAT.
Import@ss’s practical guide for autónomos, which includes a quota simulator.
Mistakes that cost money
Starting work before your social security registration.
Skipping a zero form 303. Late returns get surcharges or fines even when nothing is owed.
Not telling Spanish clients you’re new, so they withhold 15% instead of 7%.
Mixing personal and business spending without proper invoices.
Ignoring electronic notifications.
Letting the end of the flat rate surprise you in month 13.
Our honest take
For a straightforward freelancer, a gestor is a convenience, not a requirement. Register yourself using the checklist below, set reminders for the 1st of April, July, October and January, and keep your invoices tidy as you go. If one quarter feels overwhelming, you can always hand it over. You’ll still have saved the setup fee, and you’ll know exactly what you’re paying for.
