Read on 2026-10-16. The refund and discount rules can change; check the page before you plan around them.
Is it allowed
Plataforma ONE says that there is no legal impediment to working both as a self-employed individual and as an employee simultaneously, unless the individual has signed an exclusivity clause with their employer or is subject to incompatibilities required by public administration regulations. It adds that all individuals working for themselves must register as self-employed. It also says that if you are a self-employed worker and also employed under the Social Security General Regime, you are considered in a situation of simultaneous employment (pluriactivity).
How the contributions work
- Contributions are required to the RETA for self-employment and to the general regime for employed work.
- In a situation of simultaneous employment, coverage for temporary incapacity due to common contingencies in the Special Regime for Self-Employed Workers is optional as long as you contribute to it in the General Regime.
- A self-employed worker who is also employed under the Social Security General Regime has the right to a 50% refund of the excess contributions for common contingencies in both regimes.
- The General Treasury of Social Security will process the corresponding reimbursement within a maximum period of four months from the regularization of Social Security contributions.
- There are discounts on the self-employed fee if you combine your self-employed activity with salaried work.
More than one activity, and employees
- When registering as a self-employed person and starting more than one activity simultaneously, you must communicate this to the General Treasury of Social Security at that time.
- Even if you engage in more than one professional activity, your registration and contributions for self-employment will be unique.
- Self-employed people can hire employees or other self-employed professionals.
- A self-employed individual who hires an employee must register as an employer with Social Security, using the Electronic Headquarters service or the RED System, and must register the worker through the RED System.
- The hiring must be notified to the Public State Employment Service within a maximum period of 10 days.
The registration steps themselves are in the autónomo guide.
Source
Checked on 2026-10-16 against Plataforma ONE: Registration of individual entrepreneurs (self-employed). Rules and fees change, so read the official page again before you pay or travel.