Minor, Serious and Very Serious Administrative Penalties in Spain: Classification, Deadlines and How to Appeal (2026)

1. What minor, serious and very serious administrative penalties are

Minor, serious and very serious administrative penalties are the three tiers Spanish administrative sanctioning law uses to grade the public authority's response to an infringement. Not every breach deserves the same punishment: the law requires the penalty to be calibrated against the harm caused, the risk to the public interest, intent, repeat offending, any benefit obtained and the degree of non-compliance.

That grading is not left to the discretion of the case officer. It must be set out in advance in primary legislation and comply with the principles of legality, typicity, proportionality, culpability and legal certainty in Articles 25 to 31 of Law 40/2015 of 1 October on the Legal Regime of the Public Sector.

In practice, most of the files we review at [Bufete Padilla](https://bufetepadillatorrevieja.com/en/contact) — offices in Torrevieja, Elche and Moraira — are won exactly here: the authority classifies as serious what the statute defines as minor, or justifies the grading with boilerplate that does not survive an appeal.

2. Core features of the Spanish sanctioning regime

Three features define the whole system:

1. Statutory reserve. Classifying conduct as minor, serious or very serious must be done by primary legislation, not by a regulation or municipal by-law lacking statutory cover (Art. 27 Law 40/2015).
2. No custodial penalties. An administrative penalty can never involve deprivation of liberty (Art. 25.3 of the Spanish Constitution). Conduct deserving imprisonment belongs in the criminal courts.
3. Grading and proportionality. Within the statutory range for each tier, the exact amount is set by weighing intent, persistence, the nature of the harm, repeat offending and any unlawful gain (Art. 29 Law 40/2015).

3. Comparison table: minor, serious and very serious

| Tier | Concept | Grading criteria | Typical examples |
|---|---|---|---|
| Minor | Lesser breaches of limited significance, with no serious or direct harm | No relevant intent; slight economic or social harm; formal errors or oversights | Slightly exceeding the speed limit; a one-off late filing with no financial loss; formal defects in a return |
| Serious | Conduct that materially breaches the law or creates clear harm or risk | Appreciable negligence; actual harm to third parties or the public interest; repeat minor offences | Running a red light; building works without a municipal licence; concealing data from the tax authority without fraudulent means |
| Very serious | Breaches of the highest gravity affecting safety, health, public finances or fundamental rights | Clear intent or wilful misconduct; fraudulent means; grave or irreparable harm; repeat serious offences | Driving under the influence of drugs or at double the alcohol limit; illegal toxic discharges; complex tax fraud or document forgery |

4. Requirements for a valid administrative penalty

To impose a valid penalty — minor, serious or very serious — the authority must clear six checks. Failing any one of them opens the door to annulment:

1. Prior statutory definition. The conduct must be defined as an infringement by a statute in force when the facts occurred. No analogy or extensive interpretation is allowed.
2. Competence of the body. Only the legally empowered authority may investigate and decide. Manifest lack of competence renders the act void ab initio (Art. 47.1(b) Law 39/2015).
3. A formal sanctioning procedure. Commencement decision, proposed resolution, evidence and a genuine [right to be heard](https://bufetepadillatorrevieja.com/en/blog/nulidad-liquidacion-alegaciones-no-valoradas-retroaccion-an-244-2026) — not a token one.
4. Proven culpability. Intent or at least negligence must be established. There is no strict liability in sanctioning law, and the burden of proof always lies with the authority under the presumption of innocence (Art. 53.2(b) Law 39/2015).
5. Proportionality. The penalty must match the actual gravity of the facts. A fine set at the top of the range without explaining why the minimum does not apply is usually annullable.
6. Service and access to court. The decision must be formally served stating the available remedies, the competent body and the deadline. Defective service does not start the appeal clock.