Deregistering as self-employed (baja de autónomo) in Spain: RETA + Hacienda

What a baja is and why there are two

A baja is the process of deregistering as a self-employed worker (autónomo). As with registration, there are TWO of them.

Sort out my baja case

Baja en RETA (Social Security): ends your registration in the self-employed Social Security scheme and stops the monthly cuota. Usually via Import@ss or modelo TA.0521.

Baja censal at Hacienda: modelo 036 (declaración censal de baja) — you close the activity (epígrafe) and its IVA/IRPF obligations.

You must do BOTH. If you file only one of the two, some of your obligations will remain in force.

Who needs a baja

• Any self-employed worker who stops their activity — for good or for a while.
• Spain has no suspended-activity status: you file a baja when you stop and a new alta when you resume (you may register and deregister several times a year).
• If you had staff, ending their contracts and closing your cuenta de cotización are separate steps.
• If you also have a salaried job (pluriactividad), the self-employed baja does not affect the employee scheme.

What you are entitled to

• To stop paying the RETA cuota from the baja date (filed on time, you pay only for the days you were registered that month).
• The right to cese de actividad (the self-employed benefit) if you meet the conditions — see the dedicated guide.
• The right to re-register (alta) later; your contribution history is kept.
• The right to challenge a wrong debt/recargo and request an aplazamiento (instalments).

Baja deadlines

• Baja en RETA: notify within 6 calendar days of ceasing the activity.
• If you file the RETA baja on time, the cuota covers only the days you were registered — but this applies only to the first three bajas in a calendar year (art. 46.4 RD 84/1996). From the fourth baja in the same year the contribution runs to the end of the month, so you pay the full month.
• Baja censal (036): filed when you cease; then the final quarterly returns for the period worked.
• Cese de actividad (if you qualify): you can claim it until the last day of the month after the activity stopped; late filing reduces the benefit period.

What to prepare

• NIE and a certificado digital or Cl@ve — for Import@ss and the AEAT Sede.
• The actual date you ceased the activity.
• The activity (epígrafe IAE) you are closing.
• Documents for cese de actividad if you will claim it (cause of cessation, contributions).

How to close, step by step

• File the baja en RETA through Import@ss (or modelo TA.0521) within 6 calendar days of ceasing — on 1 August 2026 the deadline was extended from 3 to 6 days (RD 643/2026).
• File the baja censal at Hacienda: modelo 036, marking the end of the activity (epígrafe).
• File the final quarterly returns required for your regime (for example 303/130/131 if applicable) for the period worked — including “zero” returns when they are mandatory.
• If you have grounds, claim cese de actividad (the self-employed benefit).
• Save the justificantes for both bajas and the returns — that is your proof of closure.

A real case: deregistering with the tax agency did not stop RETA

Common mistakes

• Filing the baja en RETA and forgetting the baja censal, or the other way round: the remaining obligations stay live and attract penalties.
• Missing the 6-day RETA window, which can leave you paying contributions you no longer owe.
• Not filing the final quarterly forms that apply to your regime (for example 303/130/131).
• Not claiming cese de actividad when you are entitled to it.
• Simply stopping payments without filing the baja, which builds a Social Security debt and can end in an embargo.

Debts and how to react

• If you don’t file the baja and stop paying, the cuota, recargo and Social Security debt build up.
• A Hacienda debt from unfiled returns can also grow through penalties and surcharges — close the censal and file the final modelos.
• You can request an aplazamiento/fraccionamiento of the debt — check the conditions.
• Sometimes there are grounds to challenge an assessment or the baja date — gather your justificantes and notices.

Related guides

Frequently asked questions

Official sources