Fill the AEAT Modelo 036 Declaración Censal — Free, No Sign-Up
Declaración Censal de Empresarios, Profesionales y Retenedores. Fill it in your browser, then submit on sede electrónica AEAT.
Note: Modelo 036 must be presented through the sede electrónica of the Agencia Tributaria using a digital certificate, electronic DNI or Cl@ve credentials (paper at a delegación AEAT is allowed only in narrow cases for personas físicas). Use this page for drafting, gestor review, paper records and learning the form — submit the final version at agenciatributaria.es. Go to sede electrónica AEAT.
About Modelo 036
Modelo 036 is the Declaración Censal de Empresarios, Profesionales y Retenedores — the form Spanish businesses, autónomos and retenedores file with the Agencia Tributaria (AEAT, "Hacienda") to register, modify or cancel their entry in the Censo de Empresarios, Profesionales y Retenedores. It is the single most important administrative form in the life cycle of any business in Spain: it issues or updates the NIF (or CIF for legal entities), elects IVA regimes (recargo de equivalencia, criterio de caja, monthly vs. quarterly IVA via REDEME), registers IAE epígrafes (Impuesto sobre Actividades Económicas codes), declares establecimientos, and opens or closes obligations such as Modelo 303, Modelo 130, Modelo 111 and Modelo 200. With PDF Edit you can open the Modelo 036 layout directly in your browser and fill every casilla without uploading anything to the internet — your data stays on your device.
Who files it. Every business in Spain — autónomos, sociedades limitadas (SL), sociedades anónimas (SA), civil partnerships, professional partnerships, comunidades de bienes — plus any person or entity acting as a retenedor (paying salaries or professional fees with IRPF retention, paying dividends, paying rents above the threshold) must file Modelo 036 to enter the Censo de Empresarios. Resident autónomos without special obligations may file the simplified Modelo 037 instead, but Modelo 036 always covers the full case. Personas físicas updating only their personal data (without an economic activity) use Modelo 030.
When you file it. The form is filed at three moments in the life cycle of the activity: alta (before starting any economic activity), modificación (within one month of any change of activity, domicilio fiscal, IAE epígrafe, IVA régimen, cuenta bancaria, representante, etc.), and baja (within one month of ceasing the activity). Régimen elections that take effect from the following calendar year — criterio de caja, simplified régimen, REDEME — must be exercised in December of the prior year. Filing happens through the sede electrónica AEAT using a digital certificate, electronic DNI or Cl@ve credentials; paper presentation at a delegación AEAT is allowed only for personas físicas in narrow cases.
How to Fill Modelo 036 Online — in 4 Steps
1. Click "Fill Modelo 036 Form Free"
The button above opens the official Modelo 036 layout inside the PDF Edit editor — running entirely in your browser. No download, no signup, no upload.
2. Pick alta, modificación or baja
Page 1 of Modelo 036 is "Causas de presentación". Tick the right box — alta (start activity), modificación (change of activity, address, régimen) or baja (cease activity). The rest of the form is structured around that single choice.
3. Fill identification, activity and régimen pages
Type the NIF / CIF, domicilio fiscal, representante data, IAE epígrafes (page 4), IVA regimes (page 5 — recargo de equivalencia, criterio de caja, OSS, IOSS, SII, REDEME, NIF intracomunitario / ROI) and any retenciones obligations. Tab moves between casillas.
4. Save or print, then submit on AEAT
Click Save to download the completed Modelo 036 as a PDF, or press Ctrl+P (⌘+P on Mac) to print. Then log in to sede electrónica AEAT with your certificate or Cl@ve and submit the official version there.
Why Use PDF Edit for Modelo 036?
Free — really free
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Every form in our library loads as a fillable PDF with real AcroForm fields — click any casilla and type. Not a flat scan, not a separate data-entry form that rebuilds a new PDF on download. What you see is the real Modelo 036 layout.
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Modelo 036 contains NIFs, domicilios, cuenta bancaria, IAE codes and representante data. None of it leaves your device. The editor runs entirely client-side — there is no server-side copy because there is no server.
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File Modelo 036 for the alta today, the modificación next month and the baja in five years on the same browser — no "3 free uses per day" trap, no "you've used your monthly quota". Volume is exactly the same as Hacienda's: zero limit.
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Frequently Asked Questions
What is Modelo 036?
Modelo 036 is the Declaración Censal de Empresarios, Profesionales y Retenedores — the form Spanish businesses, autónomos and retenedores file with the Agencia Tributaria (AEAT, "Hacienda") to register, modify or cancel their entry in the Censo de Empresarios, Profesionales y Retenedores. It is used to obtain or update a NIF (or CIF for legal entities), to elect VAT regimes (recargo de equivalencia, criterio de caja, monthly vs. quarterly IVA), to register IAE epígrafes (Impuesto sobre Actividades Económicas codes), to declare establecimientos, and to opt into OSS, IOSS or the SII. The simplified version for resident autónomos with no special obligations is Modelo 037.
Who must file Modelo 036?
Every business in Spain — autónomos, sociedades limitadas, sociedades anónimas, civil partnerships, professional partnerships, comunidades de bienes — plus any person or entity acting as retenedor (e.g. paying salaries or professional fees with IRPF withholding) must file Modelo 036 to be in the Censo de Empresarios. New autónomos file it for the alta (before starting activity); existing taxpayers file it for any modificación (change of activity, address, IAE epígrafe, tax regime, bank account for direct debit, OSS opt-in, etc.); and they file it again for the baja when ceasing the activity. Modelo 037 covers a subset of resident autónomos without special obligations.
Modelo 036 vs Modelo 037 — when to use which?
Modelo 036 is the full censal form for all situations; Modelo 037 is its simplified version for resident autónomos (personas físicas, residentes en España) who meet narrow conditions: only domestic activity, no recargo de equivalencia outside the general retail case, no criterio de caja, no OSS/IOSS, no SII, no NIF intracomunitario, no monthly IVA refunds (REDEME), no establecimientos permanentes outside their domicilio fiscal, and no retenedor on rentals. The moment any of those situations applies — you trade with EU customers, you opt into criterio de caja, you operate a separate local — you must use Modelo 036. Legal entities (SL, SA, comunidades de bienes, asociaciones) always use Modelo 036.
What is the deadline for the alta on Modelo 036?
The alta censal on Modelo 036 must be filed before the start of the economic activity — that is, before issuing the first invoice or making the first relevant operation. In practice, autónomos file Modelo 036 (or 037) on the same day they file the alta in RETA (Régimen Especial de Trabajadores Autónomos) at the Tesorería General de la Seguridad Social. Sociedades file it within the month following their constitution at the Registro Mercantil and after receiving the NIF provisional. Late altas trigger the recargos for late filing of the related autoliquidaciones (Modelo 303, Modelo 130, Modelo 111) plus a sanción for falta de presentación de declaración censal.
What is the deadline for a modificación censal on Modelo 036?
Modifications must be declared within one month of the date the change takes effect: change of domicilio fiscal, change or addition of activity / IAE epígrafe, opening or closing of an establecimiento, change of régimen de IVA (e.g. opt-in to criterio de caja in December for the following year, change from quarterly to monthly IVA via REDEME), change of cuenta bancaria for domiciliación, opt-in to OSS / IOSS / SII, change of representante or of directors. The exception is the criterio de caja opt-in / opt-out and similar régimen choices, which must be exercised in the month of December prior to the year they take effect. Missing the one-month window does not invalidate the change but exposes the taxpayer to a sanción for declaración censal extemporánea.
What is the deadline for the baja censal on Modelo 036?
The baja must be filed within one month after the cessation of the activity. For autónomos, the censal baja on Modelo 036 (or 037) is filed alongside the baja in RETA at the Tesorería de la Seguridad Social; for sociedades, the baja is filed after the disolución and liquidación have been registered at the Registro Mercantil. Filing the baja closes the obligation to present further Modelo 303 / 130 / 111 returns, but any return for periods up to the cessation date must still be submitted. Until the baja is registered, AEAT continues to expect periodic returns and may issue requerimientos if they don't arrive.
How do I choose the right IAE epígrafe on Modelo 036?
IAE epígrafes are the Impuesto sobre Actividades Económicas codes — a four-digit (sometimes longer) classification of the activity, structured in three sections: empresarial (industrial, retail, services), profesional (regulated professions, liberal activities) and artística. On Modelo 036 page 4 you list every epígrafe that applies, with the date of alta. The choice matters: it determines whether the activity is considered profesional (which triggers IRPF retention by clients on invoices) or empresarial (no IRPF retention), and it can affect IVA rates and exemptions. Most autónomos starting out are below the €1 million net turnover threshold and are exempt from paying IAE, but the declaración on Modelo 036 is still required.
How do I elect VAT regimes (recargo de equivalencia, criterio de caja, monthly IVA) on Modelo 036?
Modelo 036 page 5 (and surrounding pages) is where you elect IVA regimes. Recargo de equivalencia applies automatically to autónomos who resell goods to final consumers without transformation — you just check the corresponding box. Criterio de caja must be opted into actively, in December of the year prior to the one it applies to (turnover < €2,000,000, no cash collection from a single client > €100,000). Monthly IVA refunds via REDEME (Registro de Devolución Mensual) also require an opt-in via Modelo 036, and force you into SII. You also tick boxes here for OSS, IOSS, NIF intracomunitario (ROI — Registro de Operadores Intracomunitarios), and the exoneración of Modelo 390 if applicable.
What are the most common mistakes on Modelo 036?
The recurring mistakes are: (1) choosing the wrong IAE epígrafe — an empresarial code where a profesional one applied (or vice versa), which then mis-handles IRPF retention on invoices; (2) forgetting to file a modificación within the one-month window when an address, activity or régimen changes — exposes the taxpayer to sanciones; (3) opting into criterio de caja late — the window is only December of the prior year; (4) not registering for ROI / NIF intracomunitario before the first EU B2B sale, which forces an invoice rework; (5) filing the baja in RETA but forgetting the censal baja on Modelo 036, so AEAT keeps expecting Modelo 303 and Modelo 130 returns; (6) wrong cuenta bancaria for domiciliación, causing the next IVA / IRPF payment to fail.
Can I submit Modelo 036 directly from PDF Edit?
No. The Agencia Tributaria accepts Modelo 036 only through the sede electrónica AEAT (agenciatributaria.es), authenticated with a digital certificate, electronic DNI or Cl@ve credentials, or — in a narrow set of cases for personas físicas — on paper at a delegación AEAT. PDF Edit lets you fill the Modelo 036 layout in your browser for drafting, gestor / asesor fiscal review, paper records or learning the form — your data stays on your device and nothing is uploaded. For the actual presentation, log into agenciatributaria.es and submit there.