Modelo 036 / 037 — Spanish Tax Registration for Autónomos

1. What Modelo 036 / 037 actually is

Modelo 036 is the declaración censal de alta, modificación y baja — the master census declaration filed with the Agencia Tributaria (AEAT) that puts you on Spain's Censo de Empresarios, Profesionales y Retenedores. Modelo 037 is the same declaration in a stripped-down, four-page format, available to standard resident autónomos.

It is the form that tells Hacienda who you are, where you are, what you do, how you'll pay VAT and whether your clients should withhold IRPF. Every quarterly form you file thereafter — Modelo 303, Modelo 130, Modelo 349 for EU sales — reads off the data you set here.

The legal basis is the Ley General Tributaria (Ley 58/2003) and the census regulation in Real Decreto 1065/2007. The official portal lives at sede.agenciatributaria.gob.es.

Modelo 036 / 037 at a glance

2. Who uses 036, who uses 037

Modelo 037 is a shortcut — but you only qualify if every condition below is met. Tick a single box from the "must use 036" column and the simplified form is off the table.

A practical rule of thumb for expats: start with 037, then upgrade to 036 the moment you (a) request ROI for an EU client, (b) start renting commercial premises and have to withhold on the rent (Modelo 115), (c) hire your first employee, or (d) cross into gran empresa territory. The upgrade is itself a Modelo 036 modificación.

3. Epígrafes IAE — choosing your activity code

The Impuesto sobre Actividades Económicas (IAE) tariff is a 1990 list of every economic activity, codified into a four-digit epígrafe. Your epígrafe tells Hacienda exactly what you do — and from that single choice, three big consequences cascade.

The two sections

• Sección 1 — Empresariales (business activities). Codes in the 100–999 range. Shops, cafés, e-commerce, holiday-let management, building trades, transport, manufacturing. No IRPF retención applies to your invoices — your customers pay you in full.
• Sección 2 — Profesionales (professional activities). Codes in the 700–899 range. Translators, IT consultants, architects, lawyers, designers, copywriters, marketing freelancers, journalists, therapists. Your Spanish business clients must withhold IRPF at 15% (or 7% in your first three calendar years of activity).
• Sección 3 — Artísticas y deportivas. Codes in the 0xx range. Actors, musicians, professional athletes, bullfighters. Retención applies as for sección 2.

The full tariff is in RDLeg 1175/1990, published on the BOE. The official consolidated text is available at boe.es; AEAT also publishes a searchable index on the Modelo 036/037 portal.

Common epígrafes for expat autónomos

You can declare more than one epígrafe at alta — and you must add or remove epígrafes by Modelo 036/037 modificación whenever your activity mix changes. Autónomos are exempt from paying actual IAE tax up to €1M of turnover, but you still register the code.

4. VAT regime — IVA general, recargo and exemptions

The VAT block of Modelo 036/037 sets which IVA regime applies to your invoices. Three roads cover almost every autónomo case.

Régimen general (the default)

You charge 21% IVA (standard rate), 10% (reduced — hospitality, certain food) or 4% (super-reduced — books, basic groceries) on your invoices. You file Modelo 303 quarterly to remit collected IVA minus deductible input IVA. The annual summary is Modelo 390. Most autónomos sit here.

Operaciones exentas (exempt activities)

Certain activities are exempt from IVA under Article 20 of the Ley del IVA: medical and healthcare services performed by qualified professionals, private teaching and tuition of school curriculum, financial intermediation, residential letting, insurance mediation and some cultural services. If you declare an exempt epígrafe, you do not charge IVA — and you cannot reclaim input IVA either. You still file Modelo 036/037 to register the activity; you generally do not file Modelo 303 (a few exempt activities require an "exempt" quarterly nil return — your gestor will confirm).

Recargo de equivalencia (retail)

A simplified regime for individual autónomos who run a retail business selling physical goods to end consumers (not businesses). Your supplier adds a small surcharge (5.2% / 1.4% / 0.5% on top of normal VAT) to invoices to you, and in exchange you don't file VAT returns at all. Available only to personas físicas, never to SLs.

REAGP and special regimes

Agriculture, livestock and fishing (REAGP), travel agencies and second-hand goods (margen) have their own special VAT regimes. These all require Modelo 036 (not 037) and specialist advice — beyond the scope of this guide.

5. IRPF retención — set-up on the form

If your epígrafe is in sección 2 (professional) or sección 3 (artistic), the Modelo 036/037 box asks whether your invoices to Spanish businesses will be subject to retención IRPF. The answer is yes — Spain's withholding obligation is built into the regime.

The standard rate: 15%

When you invoice a Spanish business, autónomo or community of owners (B2B), they withhold 15% of your fees (excluding IVA) and pay it directly to Hacienda on their Modelo 111 (quarterly) and Modelo 190 (annual). You receive 85% on the day; the missing 15% is credited against your annual Modelo 100.

The starter rate: 7% (first three years)

If you're newly registered as a professional autónomo, you can elect on Modelo 036/037 to apply a reduced 7% retención for the calendar year of alta and the two following calendar years. You tick the box at registration; clients then use 7% instead of 15% on their Modelo 111 filings. After three years (or earlier if you've stopped and restarted), you revert to 15% automatically.

No retención applies if…

• Your epígrafe is in sección 1 (business activity) — shops, cafés, e-commerce never have retención on customer invoices.
• Your client is a private consumer (B2C) — retention is a B2B obligation that only Spanish businesses and self-employed parties carry.
• Your client is a non-resident foreign company with no Spanish establishment. EU and non-EU companies don't operate Spanish withholding.

6. ROI — the Registro de Operadores Intracomunitarios

The ROI is Spain's section of the EU's VAT Information Exchange System (VIES). Until you're listed there, Hacienda treats every cross-border EU transaction as if you were a Spanish consumer — meaning you pay Spanish IVA on the way in and can't issue VAT-free B2B invoices on the way out.

When you need ROI

• You invoice EU business clients for services (a UK or US client doesn't need ROI — they're outside the EU). German, French, Dutch, Italian B2B invoices issued VAT-free require both you and the client to be VIES-registered.
• You buy services from EU suppliers — Stripe (Ireland), Google Ads (Ireland), Facebook (Ireland), Microsoft, AWS, Zoom, almost any major SaaS — and want them to invoice you without their local VAT. They check your VIES status before invoicing zero-rated.
• You sell goods B2B to other EU countries (intracomunitario delivery — IVA-free for the seller, reverse-charge for the buyer).
• You buy goods from EU suppliers for business resale or use.

How to request ROI

You tick the ROI box on Modelo 036 (page 5, the IVA block) — ROI is one of the situations that pushes you off Modelo 037 onto 036. You then wait. AEAT runs a verification check that takes up to three months: they may issue a requerimiento asking what EU activity you'll be doing, who your customers are, and where you'll be based. Be ready to produce contracts, supplier emails or a client letter.

Once granted, your NIF gains an "ES" prefix on the VIES register and your suppliers can invoice you VAT-free. You then file Modelo 349 (recapitulative statement of intracomunitario operations) quarterly or monthly summarising the volumes — see the AEAT Modelo 349 portal.

7. How to file Modelo 036 / 037 — step by step

Step 1 — Get a digital certificate or Cl@ve PIN

You need an electronic identification method to file at the AEAT portal. The two options are an FNMT digital certificate (issued by the Real Casa de la Moneda — request at sede.fnmt.gob.es) and Cl@ve PIN (the Spanish government's mobile-PIN identification — register at clave.gob.es). Both require a NIE and an in-person ID check. Get one before you start the rest.

Step 2 — Have your facts ready

Before opening the form, decide and write down: (i) the exact start date of activity, (ii) your declared tax address (domicilio fiscal) and activity address if different, (iii) one or more epígrafes IAE, (iv) the IVA regime (almost always régimen general), (v) the IRPF regime (estimación directa simplificada is default), (vi) whether you elect the 7% reduced retención, and (vii) whether to request ROI.

Step 3 — File online

At the AEAT Modelo 036/037 portal, log in with your certificate or Cl@ve PIN. The system auto-routes you to 037 if you tick the simplified eligibility box; otherwise the full 036 opens. Complete the relevant pages, validate, and submit. You receive an immediate PDF receipt with a 13-digit number — keep it.

Step 4 — Then register at Seguridad Social

Within 60 days of Hacienda alta you must also register at TGSS (Tesorería General de la Seguridad Social) using TA.0521. This activates your monthly autónomo cuota and gives you access to public healthcare via the state system. Hacienda and TGSS run on separate registers — being alta at AEAT does not auto-register you at TGSS. See the official TGSS autónomo portal.

Step 5 — Town hall licensing if applicable

If you operate from premises open to the public — a bar, shop, café, beauty salon, gym — your municipality requires a separate licencia de apertura or declaración responsable. This is independent of Hacienda. Online-only autónomos and home-office consultants generally don't need town-hall approval.

8. Change-of-circumstance updates

The census is meant to be a live record. Every material change in your situation needs a modificación filed within one month using Modelo 036 or 037 — whichever applies to your current set-up.

Changes that require a modificación

• Change of tax address. Moving from a flat in Valencia to a house in Málaga: file within 30 days. Hacienda sends letters and electronic notifications to whatever address is on the census.
• Adding or removing epígrafes. A web designer adding marketing consultancy as a second activity, a café owner adding a small terrace serving food: separate epígrafe, separate line.
• Switching VAT regime. Opting in or out of recargo de equivalencia, joining REAGP, opting into the REDEME monthly refund regime.
• Switching IRPF regime. Estimación directa simplificada to normal, or in/out of módulos (mostly for trades).
• Requesting or relinquishing ROI.
• Opening or closing a place of business. A second café, a new shop, a leased workshop.
• Becoming a withholder. Renting commercial premises (you'll start filing Modelo 115), hiring your first employee (Modelo 111 + Modelo 190 obligations), paying a non-resident (Modelo 216).
• Becoming a gran empresa by crossing €6.01M turnover — pushes you to monthly filing.

You file modificaciones the same way as alta — online, with certificate or Cl@ve PIN, ticking the "modificación" box on page 1. Many changes (adding an epígrafe, updating the VAT regime) take effect from the date of filing; others (electing out of certain regimes) only take effect the following calendar year.

9. Closing down — the baja censal

If you stop trading — moving country, retiring, going back into employment, pausing for a sabbatical — you must file a Modelo 036 or 037 baja within one month of ceasing each activity.

The two parallel bajas

• Hacienda baja — Modelo 036/037, ticking the baja box, declaring the end-date of each epígrafe. This stops the census obligation to file quarterly returns.
• TGSS baja — model TA.0521/2, within three calendar days of stopping. This stops the monthly autónomo cuota.

Both are separate. Filing only the Hacienda baja but leaving TGSS open means you keep paying the autónomo cuota every month for nothing. Filing only the TGSS baja but leaving Hacienda open means Hacienda still expects Modelo 303, Modelo 130 (or 111, etc.) to be filed every quarter, and will issue penalties for the missing returns.

What about pending obligations?

Baja stops the future. It does not erase the past. You still owe the quarterly Modelo 303 and Modelo 130 for the period you were active in the final quarter; you still owe the annual Modelo 100 the following spring; and Hacienda retains the right to inspect for four years from each filing date.

10. Seven mistakes that cost autónomos money

The Modelo 036/037 errors we see most often with expat new arrivals:

11. How insurance fits in — and why it matters

The Modelo 036/037 box you tick at alta sets the legal framework — but it does not insulate you from the risks of running an activity in Spain. Three overlaps between census registration and insurance cover.

Activity registered, liability uncapped

Spanish autónomos respond personally and without limit for business debts and damages. There is no corporate veil. The moment Hacienda has you registered for activity 763 (IT consulting) or 6731 (café-bar), you carry personal liability for client claims, employee accidents, customer injuries, professional errors. Public liability and professional indemnity cover are what stand between a routine claim and personal ruin — and the premiums are fully deductible on your VAT and IRPF returns.

Health insurance and the autónomo tax deduction

Once you're alta and paying the autónomo TGSS cuota, you have access to Spanish public healthcare. But many expats prefer a private health policy on top — for faster access, English-speaking specialists and copay-free emergency cover. The good news: autónomo health insurance premiums are deductible for the autónomo, spouse and children under 25 living at home, up to €500/person per year (€1,500/person if disabled). The deduction is made on your annual Modelo 100 — see the DGSFP framework for authorised insurers. We arrange Sanitas and Caser policies for autónomos, both of which qualify.

Business insurance for premises and equipment

If your epígrafe puts you on the high street — a bar, salon, gym, retail shop — a business policy covering premises, contents, public liability and business interruption is normally a condition of your commercial lease. Most landlords request proof of cover before signing. Premiums are deductible on Modelo 303 (input IVA) and on your IRPF profit calculation.

Related guides and official sources

This guide is general information based on Spanish tax law (Ley 58/2003 General Tributaria, RD 1065/2007, RDLeg 1175/1990 IAE) and AEAT practice as at June 2026. It is not personal tax advice. Your circumstances, regional rules, prior elections and prior alta history may produce a different answer — always consult a registered gestor or asesor fiscal before filing. 247 Expat Insurance is registered with the DGSFP under Spain's insurance distribution framework; we are insurance specialists, not tax advisers.