Theory of crime · Article 21 CP · Throughout Spain

Criminal mitigating circumstances

Confessing, making amends or suffering undue delay: powerful levers to reduce the sentence.

Article 21 of the Spanish Criminal Code lists the mitigating circumstances: serious addiction, state of disturbance, confession, reparation of harm, undue delay in the proceedings. Properly argued, they reduce the sentence — sometimes by one or two degrees when highly qualified.

In brief. the mitigating circumstances of Article 21 reduce the sentence: incomplete ground (21.1), serious addiction (21.2), state of disturbance (21.3), confession before learning of the proceedings (21.4), reparation of harm (21.5), undue delay (21.6) and mitigation by analogy (21.7). When highly qualified, a mitigating factor lowers the sentence by one or two degrees.

Repères

21
Article of the Criminal Code listing the mitigating circumstances.
21.6
Undue delay in the proceedings: a frequent and effective mitigation.
24h
English-speaking lawyer, mitigation strategy throughout Spain.

What lightens the sentence

Mitigating factors act on the measure of the sentence. They do not remove liability but, under Article 66, require the court to individualise the sentence downwards according to their number and intensity.

Some are very powerful. Confession (21.4), reparation of harm (21.5) and undue delay (21.6) are frequently accepted and, when highly qualified, lead to a reduction of one or two degrees.

Strategy is prepared early. Compensating the victim, acknowledging the facts at the right time or documenting the delays of the proceedings are decisions taken from the investigation stage.

What we argue

The mitigating circumstances

Art. 21.1 CP

Incomplete ground

A non-essential element of an exclusion ground missing: sentence reduction.
Art. 21.2 CP

Serious addiction

Acting because of a serious dependence on alcohol or drugs.
Art. 21.3 CP

Disturbance or passion

Acting under a state of disturbance, anger or a powerful stimulus.
Art. 21.4 CP

Confession

Confessing to the authorities before learning of the proceedings.
Art. 21.5 CP

Reparation of harm

Repairing or reducing the victim’s harm before trial.
Art. 21.6 CP

Undue delay

Extraordinary, unjustified delay not attributable to the accused.
Art. 21.7 CP

Mitigation by analogy

Any circumstance of analogous significance to the above.
Art. 66 CP

Effect on the sentence

One factor imposes the lower half; highly qualified, one or two degrees less.
Art. 21.2 CP

Highly qualified factor

Particular intensity justifying a reinforced reduction.
Effects

Overview of the mitigating factors

Circumstance Article Effect on sentence Key condition
Incomplete ground 21.1 One to two degrees less Non-essential element missing
Serious addiction 21.2 Lower half Dependence at the time
Disturbance / passion 21.3 Lower half Powerful stimulus
Confession 21.4 Lower half Before knowing of proceedings
Reparation of harm 21.5 Lower half Before trial
Undue delay 21.6 Lower half or more Delay not attributable to accused
Analogy 21.7 Lower half Analogous significance
Highly qualified 66 One to two degrees less Particular intensity

Indicative elements based on the Spanish Criminal Code. The effect depends on the number and intensity of the factors and on any aggravating circumstances. This overview does not replace a lawyer’s analysis.

Our difference

Mitigation is built, not improvised

Each mitigating factor has precise conditions. Confession must precede knowledge of the proceedings; reparation must be real and before trial; undue delay must be documented in the detail of the proceedings.

We prepare mitigation from the investigation stage. A payment to the victim, a well-timed acknowledgement of the facts or a rigorous record of the delays can, together, bring the sentence down by one or two degrees.

01

Identifying every applicable mitigating factor

02

Confession and reparation strategy

03

Documenting undue delay in the proceedings

04

Seeking the highly qualified mitigating factor

How we act

A structured defence at every stage

Phase 01

Analysis of the facts and circumstances

Phase 02

Reparation and confession at the right time

Phase 03

Plea of the mitigating factors and their qualification

Phase 04

Individualisation of the sentence at judgment

Who we represent

Very different situations

D

People under investigation

Accused persons seeking to reduce the sentence through mitigating factors.

S

People with addictions

People whose dependence played a role in the commission of the acts.

R

Those willing to make amends

People ready to compensate the victim to mitigate their liability.

P

Long-standing defendants

People whose proceedings drag on without justification.

FAQ

What you should know

What are mitigating circumstances for?
They reduce the sentence. Under Article 66, one mitigating factor imposes the lower half and, if highly qualified, a reduction of one or two degrees.
Does confession always mitigate?
Only if it occurs before the perpetrator learns of the proceedings against them (Art. 21.4). A later acknowledgement falls under mitigation by analogy.
Does compensating the victim help?
Yes. Reparation of harm (Art. 21.5), made before trial, is a frequent and effective mitigation, even if partial.
What is undue delay?
An extraordinary, unjustified delay in the proceedings not attributable to the accused (Art. 21.6), which mitigates the sentence and may be highly qualified.
Can several factors be combined?
Yes. The combination of mitigating factors, absent aggravating ones, can bring a reduction of one or two degrees.
When should strategy be prepared?
From the investigation stage. Reparation, confession and documenting delays are decided early. The firm assists 24/7 in Spain.

Speak to a criminal lawyer

In a fast-track case, the days you have are the case.

Criminal defence in English before the courts of Alicante and the rest of Spain, for residents and for visitors who have flown home.

Logotipos-abogacia-scje
Paseo De La Castellana 216 8º 28046 Madrid
Alicante – Playa de San Juan Av. Ansaldo 31, local 16, 03540 Alicante
London: 20 Wenlock Road, N1 7GU, United Kingdom
Paris: 72 Faubourg St Honoré, 75008, France
info@societejuridique.com

Société de Conseil Juridique et Expert is a law firm with offices in Madrid, Alicante, London and Paris, specialising in criminal law, technology law and economic and corporate crime. We provide strategic guidance in complex criminal proceedings, intellectual property and technological resources for legal decision-making with advanced forensic analysis. Our multidisciplinary team combines legal experience, legal intelligence and personal attention to deliver effective solutions adapted to each case. Legal assistance available 24 hours a day and online consultations.

Copyright © 2026 Société de Conseil Juridique et Expert S.L.

EspanolEnglishFrancaisРусскийItalianoDeutsch
WhatsApp · Urgencias 24h