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How to become self-employed in Castellón de la Plana (2026)

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Cost

€80.00

Monthly Tarifa Plana fee (first year). Free initial procedure.

Time at office

0 minutes (100% online process)

Estimated time

24-48 hours for effective registration

Quick summary

Comprehensive guide for becoming self-employed in Castellón de la Plana, Community of Valencia. Procedures include tax registration and Social Security enrollment, Tarifa Plana, and support from the Community of Valencia for entrepreneurs in 2026.

Required documents

  • Digital Certificate or Electronic DNI

    Essential for all tax and Social Security procedures. Alternatively, you can use Cl@ve.

  • Bank Account Number (IBAN)

    Required to domicile monthly self-employed fees in the RETA.

  • Tax Registration (Model 036 or 037)

    Notify the Tax Agency of your economic activity start. Choose the appropriate IAE classification code.

  • Registration in RETA

    Enroll as a Self-employed Worker in the Social Security through Importass.

80 €
Monthly Tarifa Plana fee (first year). Free initial procedure. €80.00
€80.00
€80.00

: 2026

Step by step

  • 1

    Tax Registration (Model 036 or 037)

    Go to official site

    Notify the Tax Agency of your economic activity start. Choose the appropriate IAE classification code. Model 037 is the simplified version and used by most individual self-employed individuals.

    !

    Expert tip

    "You can submit it online with a Digital Certificate or Cl@ve. If you’re unsure about the IAE code, the AEAT has an activity search tool on their website."

  • 2

    Social Security Registration (RETA)

    Go to official site

    You have up to 60 natural days from starting your business to register. Do it through Importass of the Social Security. Registering on the first day of the month avoids paying a proportional fee.

    !

    Expert tip

    "When registering in Importass, check the box for Tarifa Plana at 80€/month. It’s automatic for new self-employed without previous activity in the last two years."

  • 3

    Consult Support from Community of Valencia

    Go to official site

    The Generalitat Valenciana supports new self-employed through IVACE (Institut Valencià de Competitivitat Empresarial) and Labora (Servei Valencià d’Ocupació i Formació). Offices Xarxa PROP offer on-site support and aid processing. Key organization: IVACE / Labora / Xarxa PROP.

    !

    Expert tip

    "Many regional aids are compatible with the national Tarifa Plana. Consult IVACE / Labora / Xarxa PROP before starting to avoid missing application deadlines."

  • 4

    Business License or Prior Notification (if applicable)

    Go to official site

    If you have a physical location in Castellon de la Plana, obtain the corresponding license or declaration of responsibility from the City Hall. For office-type services without public access, generally no license is required.

    !

    Expert tip

    "For most home-based businesses or offices without public access, you don’t need a municipal license. Consult with the City Hall if in doubt."

Offices and service points - Castellon

Tax Agency — Online Service (available nationwide)

Online service available at sede.agenciatributaria.gob.es

901 200 345
Online: 24 hours / Phone: Monday to Friday 09:00 - 19:00

Frequently asked questions

How long does the Tarifa Plana of 80€ last?
The Tarifa Plana of 80€/month applies for the first year of registration in RETA. After that, the contribution is calculated based on estimated net earnings for the current year (effective since 2023).
Can I claim unemployment benefits while becoming self-employed?
Yes. You can either claim full unemployment benefits once or partially combine them. Check with your SEPE office before registering.
What specific supports does the Community of Valencia offer for self-employed individuals?
IVACE offers funding lines and acceleration programs for innovative entrepreneurs. Labora manages the Entrepreneurship and Self-Employment program, providing grants to unemployed people who start their own business. Xarxa PROP offices facilitate all procedures on-site.
Which IAE classification should I choose?
The IAE code identifies your economic activity for tax purposes. Choose the one that best describes what you will do. The AEAT has an online search tool. If you have multiple activities, you can register under several codes simultaneously.
When do I start paying self-employed fees?
Starting from the first day of the month after registration. If you register on January 1st, you pay the full monthly fee for that month. If registered mid-month, you only pay a proportional amount. That’s why it’s best to register on the first day of the month.

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.