2025 was the year of the “new registers”:

  • The Single Register of Short-Term Leases and the Digital Single Window (DSW) have been in place since 2 January 2025 and are mandatory since 1 July 2025 for advertising holiday homes and seasonal rentals on platforms such as Airbnb or Booking.

  • The Royal Decree 933/2021 and the platform SES.HOSPITALITY are fully mandatory as of 2 December 2024 for the registration and reporting of travellers in accommodation and self-drive car rental.

In 2026 the focus changes: it is no longer about “knowing the norm”, but about demonstrate compliance, The new system, with more data, more traceability and more inspection capacity on the part of the administrations.

In this article we tell you what 2026 will mark for the future:

  • Tourist accommodation and short-term rentals.

  • Small lodgings, hostels and rural houses.

  • Companies of rent a car.

And how we can help you enter 2026 with your homework done.

Where we are at the start of 2026

At this stage, the legal scenario is this:

  • Digital Single Window (DSW) y Single Registry of Leases already operational, with NRA/Registration Number mandatory to advertise holiday homes and seasonal rentals.

  • Online platforms must verify that each advertisement has a valid registration number and remove those that do not comply.

  • The Travellers' Registration according to RD 933/2021 is already done, as a general rule, through SES.HOSPITALITY, except in communities with their own systems, such as Catalonia or the Basque Country.

2025 has been the year of adaptation. 2026 will be the year in which administrations will begin to real cross-referencing:

  • Is this tourist dwelling in the Single Register and, moreover, is it declaring travellers in SES?

  • Does the number of bookings seen on the platform match the volume of travellers reported?

  • Are self-driving vehicles for hire complying with RD 933/2021 and correctly communicating their users?

2026 for holiday homes: from registration to continuous monitoring

For owners and managers of tourist accommodation, 2025 was the year of “getting the registration number and surviving the bureaucracy”.”.

In 2026, the challenge is different:

  • Have all documentation aligned:

    • Registration in the autonomous community.

    • Single Registration Number/NRA via Digital Single Window.

    • Registration and communication of travellers through SES.HOSPEDAJES (or regional system where applicable).

  • Avoid obvious inconsistencies, for example:

    • Active ads on platforms with no reported traveller movement in months.

    • Volume of bookings that does not match the number of registered travellers.

    • Accommodation listed on platforms but not listed in the Single Registry.

The Autonomous Communities have already begun to open sanctioning proceedings against unregulated or non-compliant accommodation.
All indications are that, by 2026, both the automated controls such as targeted inspections.

2026 for small hotels, guesthouses and hostels

Although the Single Registry and the One-Stop-Shop focus on short-term rentals and tourist accommodation (with certain classic accommodations excluded), the RD 933/2021 does impact virtually all types of accommodation., whether they are hotels, rural houses, hostels or tourist flats.

For these establishments, 2026 brings three key messages:

  1. Paper out, digital in

    • Handwritten sheets, paper input parts and systems without clear traceability are a risk.

    • What is expected is a flow digital, orderly and exportable if requested by an administration.

  2. Consistency between PMS, SES and billing

    • PMS, booking engine, SES.HOSPACES and billing system shall “tell the same story”: same stay, same travellers, same dates.

  3. Data protection under scrutiny

    • In 2025 the AEPD has already issued specific notes on how to handle identity documentation in order to comply with RD 933/2021 and minimise data protection risks.

    • In 2026 it will be increasingly important do not overstate data or stored in an unsafe manner.

2026 for rent a car: SES not optional

The RD 933/2021 does not only affect accommodation: it also affects car rental companies without drivers.

In 2026 we will see:

  • More companies moving away from using “old-fashioned” contract sheets with no integration and moving to systems that:

    • They register the driver in the format required by the RD.

    • They generate the automatic sending to SES.HOSPEDAJES.

  • Growing interest in automate from the lease itself, without staff having to duplicate data.

Here we will help you: We have specific rent a car modules, adapted templates and automatic submissions so that the process does not depend on “someone remembering”.

Mistakes of 2025 that are costly in 2026

If in 2025 many businesses were “on the fly”, in 2026 such small oversights become serious risks:

  • Not using SES.HOSPEDAJES even though obliged to do so, trusting that “no one is in control”.

  • Incomplete input parts, with minimum data but without complying with the 17 mandatory fields of RD 933/2021.

  • Absence of evidencedo not keep proof of delivery, logs or reports in case an inspection requests them.

  • Total disconnection between what the online advertisement says, what is in the Single Registry and what is communicated to SES.

2026 is the year to correct this: to adjust flows, unify tools and have a clear and coherent picture of the activity.

Plan 2026 in 5 steps with seshospedajes.es

A practical proposal that you can develop in the content:

  1. Auditing the current situation

    • Do I have all my accommodations registered in the Single Registry / Digital One-Stop-Shop where applicable?

    • Am I using SES.HOSPEDAJES or the system that corresponds to me in my community?

  2. Centralise passenger registration

    • Using a unique tool (such as the SES.Hosting) for all equipment to register guests or drivers in the same system.

    • Avoid scattered excels, papers and home-made solutions.

  3. Automate submission to the Ministry of the Interior

    • Configure the app to generate the files in the official format of the Hosting System and send them on time.

  4. Ensuring traceability and evidence

    • Saving logs, shipment reports and supporting documents.

    • Have a history of who recorded what, when and with what data.

  5. Minimum team training

    • There is no need to turn anyone into a lawyer, but there is a need to explain:

      • What is RD 933/2021.

      • What is SES.HOSPEDAJES.

      • What role the Digital Single Window plays in business.

The role of SES.Hospedajes in the “ecosystem 2026”.”

SES.Hospedajes.es does not replace the Digital One-Stop-Shop or the regional registers, but it has become a key part of this new ecosystem:

  • Compliance with RD 933/2021 without technical complications.

  • Adaptation to both accommodation as a rent a car.

  • Automation of the most time-consuming work:

    • Collect traveller data.

    • Generate parties and contracts.

    • Communicate to the Ministry of the Interior in a correct and timely manner.

In a context where administrations increasingly cross-reference data, the difference between “keeping up with the times” and “winging it” is noticeable.

Shall we get ready now?

2026 will not be the year of “another new law”, but the year when administrations really start to use all the data they are already receiving.

If you manage a tourist accommodation, a small accommodation or a rent-a-car company, now is the time to:

  • Review your registration in the Single Registry and the Digital One-Stop-Shop.

  • Order its Register of Travellers and communication to the Ministry of the Interior.

At seshospedajes.es we help you to convert RD 933/2021 into a process simple, automated and controlled, so they can focus on what's important: their business and their guests.

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