Complete Guide for Social Security Registration and RETA
Start your economic activity in Spain legally and safely. Discover the requirements, costs, and detailed steps to register as a freelancer in the Special Regime for Self-Employed Workers (RETA) this 2026.
Why is Social Security Registration Vital?
In the labor ecosystem of 2026, registration in the **Special Regime for Self-Employed Workers (RETA)** is not just a legal obligation, but the gateway to a robust social protection system. Being correctly registered allows you to carry out your professional activity on your own with complete peace of mind, avoiding administrative sanctions that could compromise your financial future.
Through registration, you contribute to the public system and, in return, you obtain the right to fundamental benefits: healthcare, retirement pensions, coverage for work accidents, and access to the cessation of activity (the "unemployment benefit" for freelancers).
Profiles Required to Register in RETA
If you find yourself in any of these situations, registration is mandatory in 2026.
Individual Self-Employed Workers
Natural persons who regularly, personally, and directly carry out an economic activity for profit without being subject to an employment contract. This includes registered professionals and freelancers.
Collaborating Freelancers
Direct relatives (spouse or relatives up to the second degree) who regularly work for the primary freelancer.
Company Partners
Partners who have control of the commercial company or perform management and governance functions.
Entrepreneurs and Startups
Anyone who starts a business project under the umbrella of the Entrepreneurs Law, often benefiting from the Flat Rate.
2026 Freelancer Fee Simulator
Enter your projected monthly net earnings to calculate your contribution base and estimated fee under the real income system.
Documentation and Preparation
Before starting the online process, make sure you have the following items ready to avoid interruptions or denials of the procedure:
- Digital Identification: Digital Certificate, electronic DNI, or active permanent Cl@ve.
- Social Security Number: If you don't have one, you must request it beforehand.
- Bank IBAN: For the mandatory direct debit of monthly fees.
- IAE Data: The Economic Activities Tax code corresponding to your work (defined in Form 036 or 037).
Step by Step: How to Register in 2026
Registration with the Tax Agency (Hacienda)
This is technically the first step. You must submit form 036 or 037 to declare the start of activity, choose your tax regime (direct estimation or modules), and the IAE code.
Note: Make sure the start date matches the Social Security registration.
Access to the Importass Portal
Enter the Importass portal of the General Treasury of the Social Security. It is the official and simplified platform for all freelancer procedures.
Identify yourself with your digital certificate to access the "Registrations, cancellations and modifications" area.
Reporting Income Projections
Under the system in effect in 2026, you must declare what net earnings you expect to obtain monthly. The system will automatically suggest the tier and the minimum and maximum contribution base for that income level.
"You can change your contribution base up to 6 times a year to adjust it to your real income."
Choice of Mutual Insurance and Coverage
You must select a Mutual Society Collaborating with the Social Security that will manage your benefits for temporary incapacity, risks during pregnancy, or cessation of activity.
In 2026, coverage for work accidents and occupational diseases is mandatory for almost all sectors.
2026 Bonuses and Aid
Starting your activity comes with powerful incentives to reduce the initial financial burden. The best known is the **Flat Rate**, which allows paying a reduced fee during the first 12 months of activity (extendable for another 12 if earnings do not exceed the SMI).
Pluriactivity Status
If you already work as an employee (you have a paycheck) and want to register as a freelancer, you enter what is known as **pluriactivity**. In 2026, this regime offers interesting advantages:
- Possibility of reductions in the contribution base to avoid overpayment of fees.
- Automatic refund of 50% of excess contributions if an annual limit set by the BOE is exceeded.
- Access to benefits from both regimes (provided minimum contribution periods are met).
Check our guide on employment contracts to understand how to harmonize both statuses.
Risks and Penalties for Not Registering
Inspection Fines
Fines for working "under the table" or failing to register in RETA range between €3,000 and €10,000 depending on the severity and duration of the omission.
Fee Surcharges
If you register past the deadline (after the start of activity), Social Security will claim back-fees with a surcharge of 10% to 20% and you will lose the right to the Flat Rate.
Total Lack of Protection
In case of a work accident, you will not be entitled to economic benefits from the Mutual Society, assuming all medical costs and lack of income yourself.
IAE Regularization
The Tax Agency will cross-reference data with the TGSS, potentially imposing additional penalties for lack of consistency in Form 036.
Frequently Asked Questions about Registration
Do you need help with your registration?
Don't risk your future. We have expert consultants who can process your registration in less than 24 hours, ensuring you take advantage of all available bonuses.
You can also download our Freelancer Registration Checklist to do it yourself.