Registering with SES.Hospedajes is really two registrations — your entity and each of your establishments — and doing them leaves you with two separate sets of credentials: the portal ones and the web-service ones. Most of the friction comes from mixing them up. This guide walks the setup step by step, makes clear which credential does what, and explains what you need so Estadia can file on your behalf.
§ 01
What registering with SES.Hospedajes means
SES.Hospedajes is the Spanish Ministry of the Interior's platform for reporting guest data, the obligation set out in Royal Decree 933/2021. Registering is the step before you can report anything: you register who you are as the obligated party, and you register each property you operate. It is not the same as your tourist licence — a holiday let's registration number comes from the Ministry of Housing's Single Window, not from SES.Hospedajes. Two separate procedures, two separate authorities.
§ 02
Before you start: how you identify yourself
Registration happens on the Ministry of the Interior's electronic HQ, and the first thing it asks is for you to identify yourself digitally. Three methods are accepted: Cl@ve, a digital certificate — the FNMT one, for example — and the electronic DNI. Any of the three works; use whichever you already hold or find easiest to renew. If you work on a Mac, expect digital signing with AutoFirma to be more awkward than on Windows — the Ministry's Visual Guide includes a section specifically for registering from a Mac.
§ 03
Step 1 — Register the entity
First you register the entity: the obligated party, which is you as the owner or your agency. You go into the electronic HQ, identify yourself with one of the three methods, and complete the entity's details. This is also where you enable web-service reporting — the programmatic, system-to-system route — and the web-service credentials are generated when you register the entity. When it finishes, the system confirms the registration and assigns your landlord code (código de arrendador).
§ 04
Step 2 — Register the establishment
With the entity registered, you register each establishment: each property you put up for guests. It is a separate procedure, with its own details, repeated for every property. On completing it, the system assigns that property its establishment code (código de establecimiento). The rule sets a deadline: the establishment must be registered within ten days of completing the required administrative formalities and, in any case, before you start hosting.
§ 05
The two credentials: portal and web service
This is the mix-up that costs the most time. Registering leaves you with two sets of credentials that are not the same thing. The portal credentials — your digital certificate, or an access username and password — let you log into the electronic HQ and work by hand: register guests, check filings, cancel them. The web-service credentials are a different username and password, meant for a program to report on your behalf automatically. They have their own password and their own reset procedure, separate from the portal's. If you automate your filings, it is the web-service ones that matter: changing the portal password does not touch the web-service one, and vice versa.
§ 06
The landlord code and the establishment code
These are two identifiers the system itself assigns, and you will end up needing them. The landlord code (código de arrendador) identifies you as the obligated party — the entity — and is assigned when you register it. The establishment code (código de establecimiento) identifies a specific property and is assigned when you register it. Every communication sent to SES.Hospedajes carries both: the landlord code says who is reporting, the establishment code says from which property. If you later forget them, the portal has a lookup for each.
§ 07
Deadlines and what happens if you don't register
The system has been mandatory since 2 December 2024; the adaptation period is over. Once you are registered, every communication has a 24-hour deadline. And registration itself is an obligation with a penalty: not appearing in the register as an accommodation provider, or not reporting guest data at all, is a serious infringement, with fines of €601 to €30,000; reporting late, with errors, or incompletely is a minor infringement, €100 to €600. Registering on time is the cheapest way to comply.
§ 08
Where Estadia fits in
You do the registration yourself: it is a procedure between your entity and the Ministry, and no one can do it in your place. What Estadia does begins afterwards. Once you have your SES.Hospedajes credentials, you set them up in Estadia, and from then on Estadia files on your behalf — the reserva de hospedaje and the parte de viajeros — signed with your credentials, without you having to go back into the portal. The rule allows a third party to report on the obligated party's behalf as long as it is authorised to do so; that is exactly what Estadia does with yours. You register once; the day-to-day filings you handle from Estadia, in one click.
Frequently asked questions
Registering with SES.Hospedajes: the common questions
Do I need a digital certificate to register?
Not necessarily. The Ministry's electronic HQ accepts three identification methods: Cl@ve, a digital certificate and the electronic DNI. If you already have Cl@ve, that works; the FNMT digital certificate is another common option.
What is the difference between the portal credentials and the web-service ones?
The portal ones let you log into the electronic HQ and work by hand. The web-service ones are a separate username and password, for a program to report automatically on your behalf. They have separate passwords: changing one does not affect the other.
What is the landlord code (código de arrendador)?
It is the identifier the system assigns when you register your entity, marking you as the obligated party. It travels in every communication sent to SES.Hospedajes, alongside the establishment code of the property concerned.
Does Estadia register me with SES.Hospedajes?
No. Registration is a procedure between your entity and the Ministry, and you do it yourself. What Estadia does is file the communications for you once you are registered, signed with your own credentials.
Can an agency register and report for several owners?
Yes. The rule allows a third party to report on the obligated party's behalf, provided it is authorised to do so by one of the means accepted in law. That is the case of an agency managing several properties.
When is registration mandatory?
The system has been mandatory since 2 December 2024. The establishment must be registered within ten days of completing the required administrative formalities and, in any case, before you start hosting.