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How to Open a Business in Mostoles (2026)

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Cost

Free

Tax and Social Security registration: free. Business license fee: varies by municipality and type of activity (from €100 to several thousand).

Time at office

2-4 hours (basic procedures)

Estimated time

1-4 weeks for harmless activities; months for activities with environmental impact

Quick summary

Guide for opening a business or commercial establishment in Mostoles. Business license, tax registration and municipal procedures. Updated step-by-step guide for 2026.

Required documents

  • Valid DNI or NIE

    For the owner or founding partners.

  • Tax registration (model 036 or 037)

    Notification of start of activity to AEAT.

  • ?

    Ret A registration (if self-employed) Optional

    Enrollment in the Special Self-Employed Social Security Regime.

    ⚠️ For individual self-employed

  • Business license or responsible declaration

    Municipal authorization to operate in the premises.

  • Lease agreement or property deed

    Proof of use of the premises where the activity is carried out.

0 €
Tax and Social Security registration: free. Business license fee: varies by municipality and type of activity (from €100 to several thousand). €0.00
€0.00
€0.00

: 2026

Step by step

  • 1

    Choose the legal form and economic activity code

    Go to official site

    Decide if you operate as a self-employed individual (individual) or a company (SL, SA). The IAE (Economic Activities Tax) code determines specific taxes and requirements for your business.

    !

    Expert tip

    "For a simple start-up, the most straightforward and economical option is to operate as self-employed. An SL offers more asset protection but comes with higher management costs."

  • 2

    Tax registration — model 036 or 037

    Go to official site

    Notify AEAT of the start of activity by submitting model 036 (complete) or 037 (simplified for self-employed with no cross-border transactions). You can do this online via the AEAT website.

    !

    Expert tip

    "Tax registration should be completed before or on the day of starting business. It is free."

  • 3

    Ret A registration (if self-employed)

    Go to official site

    Register in the RETA (Special Self-Employed Social Security Regime) within 30 days of tax registration via the Social Security Electronic Service.

    !

    Expert tip

    "The minimum self-employed contribution in 2026 starts at €225/month for low income (net earnings). If you expect to earn little, declare low real income and pay less."

  • 4

    Apply for a business license from the City Council

    Submit an application for a business license or responsible declaration at Mostoles City Hall based on your type of business. Harmless activities (offices, retail without risks) are usually processed immediately with a responsible declaration.

    !

    Expert tip

    "First consult with the City Council to check if your activity requires prior authorization or can be done with a responsible declaration — it could save you weeks of waiting."

Offices and service points - Mostoles

City Hall of Mostoles - Urbanism / Licenses

Check the exact address on the City Hall of Mostoles website

Monday to Friday: 09:00 – 14:00 (appointments required in many city halls)

Frequently asked questions

What is CIRCE and what does it do?
CIRCE (Center for Information and Network of Enterprise Creation) is the government system for processing company creation electronically. It allows you to conduct all formalities related to setting up a new limited liability company in one place, simultaneously.
Do I need an opening license to open a business?
It depends on the type of activity. Harmless activities (shops, offices, hair salons) generally only require a responsible declaration and prior notification, allowing you to start operating immediately. Activities with greater impact (bars, workshops, nightclubs) may need a pre-approval license that can take months.
How much does it cost to become self-employed?
Tax and Social Security registration are free. The monthly contribution for 2026 ranges from €225 for low income to €500 for high income. There are subsidies for new self-employed individuals (flat rate) during the first year.

Official sources and useful links

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