Spain Holiday Rental Fines: What 'Muy Grave' Actually Means (2026)

If you run a holiday rental in Spain as a foreign owner, sooner or later you will read the words muy grave on an official document and wonder how worried to be. The phrase travels badly. You meet it in tables where the brackets climb to half a million euros, in a demand your property manager forwards without context, and in conversations where a letter from the Government Delegation and a file from a regional tourism department end up treated as the same thing. With two separate obligations resting on the same flat, it is easy to worry about the wrong fine. And the phrase never travels alone: it arrives alongside leve and grave, the other two rungs of the same ladder.

This guide explains the ladder in plain English and, crucially, keeps the two regimes apart, because they come from different authorities, different laws, and different amounts.

The Spanish offence ladder: leve, grave, muy grave

Spanish administrative law almost never sets a single fine for an offence. Instead it classifies each breach into one of three categories, and attaches a range of amounts to each category. The three terms you will see are:

• Leve (minor). The rung for formal slips: a step taken late, a field badly completed. The bottom of the range.
• Grave (serious). The rung for substantive breach: the obligation that simply was not met, deliberate concealment, obstruction of an inspection.
• Muy grave (very serious). The top rung. Reserved for wilful conduct with real impact, and not every rule provides for it for every conduct. Six-figure fines live here.

Two points an English speaker should hold onto. First, the rung is not decided by how serious it feels to you; it is decided by the rule when it types the conduct. In many regional tourism laws repetition does push you from grave to muy grave, but some rules assign a fixed rung to a specific conduct, and then volume does not move the classification at all. The state guest-report regime is exactly that case, as you will see below. Second, within each rung there are usually degrees (minimum, medium, maximum), and the law generally requires starting at the minimum, climbing only if a specific aggravating circumstance is proven.

So muy grave is not a fixed fine. It is a bracket, and where you land inside it depends on conduct.

The two penalty regimes: national and regional

Here is the part that catches foreign owners. When people search “spain holiday rental fines” they imagine one penalty. There are two, they have nothing to do with each other, and they stack.

Two authorities. Two bodies of law. They are independent. You can have your licence perfectly in order and still be fined by the Ministry for not filing reports. You can file every report flawlessly and still be fined by your region for never having registered the dwelling. The same flat can attract both at once.

We cover each regime in depth in RD 933/2021 penalties and renting without a tourist licence in Spain. The rest of this guide reads them side by side, so the muy grave label means something concrete depending on which fine you are looking at.

Regime 1: the guest-registration fine (state)

This is the fine for failing to submit the traveller report to SES.HOSPEDAJES, the platform run by the Ministerio del Interior under Real Decreto 933/2021.

The decree itself sets the obligation but not the amounts. For the amounts it points to the general public-safety enforcement regime in Ley Orgánica 4/2015, de 30 de marzo, de protección de la seguridad ciudadana (the “Ley Mordaza”).

Here is the first surprise, and it is the reason this article exists. This regime never reaches muy grave. Article 8 of RD 933/2021 types only two rungs, and refers exclusively to Articles 36.20 (serious) and 37.9 (minor) of Ley Orgánica 4/2015¹. Never to Article 35, which is where very serious infractions live and which contains four closed types: risky assemblies at basic-service infrastructure, weapons and explosives causing very serious harm, events held against a prohibition, and light beams projected at pilots or drivers². None has anything to do with registers or lodging.

So the brackets under that regime are just two³:

The second surprise is that most people have the two rungs backwards. Not filing the report is serious from the very first omitted report (Article 8.2.b), “the omission of the mandatory communications”). Filing it late is the leve one (Article 8.3.b), “outside the established deadline”)¹. Volume does not move the classification: one unreported stay and fifty are equally serious.

What volume does move is the amount within the rung, and there the law favours a good-faith operator: Article 33.2 requires the fine for serious infractions to be imposed at the minimum degree, which for serious infractions is €601 to €10,400 (Article 39.1.b)⁴. The €30,000 is the ceiling of the maximum degree, reserved for facts of particular gravity. Climbing a degree requires proving one of four closed circumstances, and for a paperwork breach our reading is that only recidivism declared by a final decision is realistic.

Sanctioning power over serious and minor infractions sits with the Government Delegates in the autonomous communities (Article 32.1.c)⁵, not with the Ministerio del Interior, which sanctions only very serious ones. Inspection is carried out by the Dirección General de la Policía and the Guardia Civil. In Cataluña the sanctioning authority is the Generalitat’s Departament d’Interior and in País Vasco the Basque Government’s Department of Security (Article 32.2), with the Mossos d’Esquadra and the Ertzaintza investigating. (Note: RegistroViajero submits to SES.HOSPEDAJES today; the Cataluña and País Vasco systems are still in development.)

Acknowledging responsibility and paying voluntarily each carry a reduction of at least 20% on the proposed amount, and article 85.3 of Ley 39/2015 declares them cumulative⁶: do both and you are past 40%. The condition is waiving any administrative appeal against the fine. The full breakdown, including the most common real cases, is in RD 933/2021 penalties.

Regime 2: the tourist-licence fine (regional)

This is the fine for marketing a tourist-use dwelling (vivienda de uso turístico, VUT) without being registered in your region’s tourist registry. It is imposed by your autonomous community, under that community’s own tourism law, and this is where muy grave gets genuinely heavy.

Regional tourism laws use the same leve / grave / muy grave ladder. Operating without registration is usually classed as grave, sometimes muy grave for repeat offences or clandestine provision of the service. The very-serious brackets reach six figures in several communities. A sample from the full table in our renting without a licence post:

These figures come from the regional tourism laws in force on the publication date and are revised periodically, so confirm the current amount and exact classification against your community’s law before relying on any single number. The point is the scale: the regional muy grave rung dwarfs the state one, and it is a different fine entirely.

Which licence you need, the registry name, and where to apply all vary by region. That is the subject of the tourist licence in Spain by region guide.

”Muy grave” means different money depending on the regime

Put the two side by side, with the state amounts from Article 39.1 of Ley Orgánica 4/2015³ and the Balearic ones from article 123 of Ley 8/2012⁸, and the same label behaves very differently:

That empty cell is the practical conclusion of the whole article. If you read muy grave on a document, it cannot come from the guest report: the state ceiling for failing to report is the €30,000 of the serious infraction, and in practice the €601 to €10,400 minimum degree.

So when you see muy grave on a notice, the first question is not “how much” but which authority sent it. A letter from the Government Delegation about SES.HOSPEDAJES is the state regime, and there the classification can only be minor or serious. A letter from your autonomous community’s tourism department is the licence regime, and it is the only one of the two where muy grave is possible. They will not arrive on the same letterhead, and they are resolved through separate procedures.

Additional licence penalties: closure and repeat offences

The regional licence regime carries penalties that are not money, and are often worse:

• Listing removal. Airbnb, Booking and the other platforms require a valid regional registration number and remove listings that don’t display one. No listing, no bookings, regardless of any fine.
• Cessation of activity. Many regional tourism laws allow the Administration to order temporary or permanent closure of the dwelling as an accessory penalty, on top of the fine.
• Reoffending escalates the rung. A second offence commonly pushes a grave into muy grave, and can end in permanent closure and cancellation of the registration.

The state guest-registration regime does not close your dwelling and cannot be classified muy grave, but a file opened for a serious infraction signals sustained non-reporting, which is exactly the profile that draws repeat inspection.

How to avoid both fines: licence in order, reports on time

Two obligations, two regimes, and the same simple principle for each: do the thing, and keep proof you did it.

For the licence: register the dwelling with your autonomous community before you advertise it. In most regions this is a free declaración responsable, not a slow permit. Publish the number it assigns in every listing. The step-by-step is in the tourist licence by region guide.

For the guest report: the obligation returns with every single guest. Collect their data and file it to SES.HOSPEDAJES within the deadline, every time, and keep an auditable record. Doing that by hand at volume is where a late report (leve) quietly becomes a report that never goes out at all (grave).

That second obligation is the one RegistroViajero automates: a phone-based digital check-in for guests in 9 languages, real-time validation, and automatic submission to SES.HOSPEDAJES, with an auditable log of every report.

That log is precisely what keeps you out of the serious rung: proof that the report went out, and went out on time. We do not issue tourist licences and we do not replace your community, the regional regime is yours to comply with, but the daily state obligation is the one we take off your desk.

Complying doesn’t have to be work: here’s how RegistroViajero handles the guest report.

This article is for general information and does not replace professional legal advice. The amounts and classifications cited come from the laws in force on the publication date and may be updated; the final classification of any infraction is decided by the competent Administration in each case. Always verify the detail against the official source, the BOE, the SES portal, or your community’s tourism registry.