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How to become self-employed in Terrassa (2026)

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Cost

Free

Registration is free. The monthly self-employment tax for 2026 ranges from 200€ to 590€/month depending on actual income. New self-employed individuals: flat rate of 80€/month during the first 12 months, prorrogable.

Time at office

1-2 hours (between both procedures)

Estimated time

1-2 business days (effective registration)

Quick summary

Complete guide for registering as a self-employed individual in Terrassa. Registration with Hacienda using the model 036/037 at the AEAT Delegation in Terrassa, registration with the Social Security (RETA), self-employment tax and Generalitat and SOC assistance.

Required documents

  • Valid DNI or NIE

    Valid identification document of the applicant.

  • Tax Identification Number (NIF/NIE)

    DNI is used for Spanish citizens. Foreigners must have a NIE.

  • Social Security Registration Number

    Assigned at the time of registration if you have never contributed to Spain's Social Security system.

  • Details of Economic Activity

    CNAE code or IAE subcategory of the activity you intend to carry out.

  • Bank Account Number (IBAN)

    For direct debiting of monthly Social Security tax payments.

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Registration is free. The monthly self-employment tax for 2026 ranges from 200€ to 590€/month depending on actual income. New self-employed individuals: flat rate of 80€/month during the first 12 months, prorrogable. €0.00
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: 2026

Step by step

  • 1

    Registration with Hacienda: Model 036 or 037

    Go to official site

    Register first in the Census of Entrepreneurs at the Tax Agency through the simplified model 037 (or complete model 036). You can do this online with a digital certificate or in person at the AEAT Delegation in Terrassa.

    !

    Expert tip

    "Model 037 is valid for most self-employed individuals without employees. The AEAT Delegation in Terrassa requires an appointment. If you prefer to do it online, you need a digital certificate or Cl@ve. In Terrassa, there are law firms that offer this service for 50-100€."

  • 2

    Registration with the Social Security: RETA

    Go to official site

    Register within 60 natural days (best is on day 1 of the month) in the RETA at the General Treasury of Social Security. You can do this online with a digital certificate or at the TGSS Terrassa branch.

    !

    Expert tip

    "If you register before January 1st, the full tax is due that month. If after, it's prorated. Ideal date: day 1 of the month."

  • 3

    Choose the base for contributions based on estimated income

    With the system in place since 2023, your monthly contribution is adjusted to your actual net earnings. You must indicate an estimate of annual income. This can be changed up to 6 times a year.

    !

    Expert tip

    "If you are a new self-employed individual in Terrassa, apply for the flat rate (80€/month during the first 12 months prorrogable if income < SMI). Select 'Request flat rate' in your registration."

  • 4

    Declare registration with IAE (if applicable)

    Most self-employed individuals (turnover < 1 million €) are exempt from the Business Tax. If you exceed that threshold, you must register.

    !

    Expert tip

    "Almost all individual self-employed persons are exempt from the IAE. No additional procedures are needed at the Terrassa City Council in most cases."

  • 5

    Inquire about assistance from Generalitat de Catalunya and SOC

    Go to official site

    Catalunya offers subsidies and bonuses for new self-employed individuals through the SOC (Servei d'Ocupació de Catalunya) and the Department of Enterprise. The SOC manages specific calls for self-employed in the Vallès Occidental region. Consult current calls.

    !

    Expert tip

    "The SOC offers grants up to 10,000€ for self-employed individuals in certain groups (young people under 30, women, long-term unemployed). As Terrassa is in the Vallès Occidental region, you can also consult the Consell Comarcal del Vallès Occidental for local assistance."

Offices and service points - Terrassa

AEAT Delegation (Tax Agency) in Terrassa

C/ de Galileu, 10, 08224 Terrassa

+34 901 33 55 33
Monday to Friday: 09:00 - 14:00 (with appointment)

TGSS — General Treasury of Social Security — Terrassa

C/ del Pantà de la Roca, 5, 08224 Terrassa

+34 937 36 00 00
Monday to Friday: 09:00 - 14:00 (with appointment)

Frequently asked questions

How much do self-employed individuals pay monthly in 2026?
With the system of contributions based on actual income, the monthly contribution varies between 200€/month (very low income) and 590€/month (high income). If you are a new self-employed individual, you can apply for the flat rate: 80€/month during the first 12 months, prorrogable if your net income is below the SMI.
Are there any aids for self-employed individuals in Terrassa or Vallès Occidental?
Yes. In addition to the national flat rate, the Generalitat de Catalunya and the SOC offer subsidies for new self-employed individuals, especially young people under 30, women, and those on long-term unemployment. Since Terrassa is in the Vallès Occidental region, you can also consult the Consell Comarcal del Vallès Occidental for local assistance. Visit empresa.gencat.cat and the SOC.
Do I need a digital certificate to register online in Terrassa?
Yes. To process registration with the Electronic Government of the AEAT and Social Security, you need a digital certificate (FNMT), DNI card with chip, or Cl@ve access. In Catalonia, you can also use the Generalitat's digital certificate (idCAT).
Can I be self-employed and work for an employer in Terrassa?
Yes. Pluriactivity is legal. If you already contribute as a worker on your own account, there is a bonus in the RETA contributions to avoid excessive double contribution.
Do I need to submit model 303 VAT if self-employed in Terrassa?
If your activity is subject to VAT (most are), you must file model 303 quarterly with the AEAT headquarters. You can do this online or at the AEAT Delegation in Terrassa. You should also file model 130 (fractionated payment of personal income tax) if you pay under direct assessment.

This procedure in other cities

Official sources and useful links

This guide is for informational purposes only. Always check the official source for current information.