Alcohol and sexual consent in Spain: when intoxication turns an encounter into sexual assault (Art. 178 CP)

Few situations create as much legal uncertainty as sexual encounters in which alcohol has been involved. The question underlying these cases is always the same: at what point does a consensual encounter become, in the eyes of the Criminal Code, a sexual assault? The answer does not depend on how much was drunk in the abstract, but on whether the person retained the capacity to consent. We explain this from the firm's technical standpoint, without alarmism and without promises, within the framework of Article 178 of the Spanish Criminal Code after the consent reform.

Consent as the core of Article 178 CP

Since the reform introduced by Organic Law 10/2022, Article 178 CP punishes as sexual assault any act that infringes another person's sexual freedom without their consent. The provision itself defines that consent: it exists only when freely expressed through acts that, in light of the circumstances of the case, clearly convey the person's will. The mere absence of an express refusal is not enough; a capable, freely expressed will is required.

That is why the relevant criminal question is not whether the victim had been drinking, but whether at the time of the events they retained a will capable of consenting. Alcohol comes into play precisely because, in sufficient doses, it can override or seriously impair that capacity.

Voluntary drinking versus overridden capacity

The key is to distinguish drinking from loss of capacity. Drinking, even to excess, does not automatically mean being unable to consent. It is worth separating four scenarios the firm handles in practice:

• Voluntary drinking without loss of capacity. The person has been drinking but retains a will capable of deciding freely: consent is valid and there is no offence.
• Voluntary drinking with serious loss of capacity, exploited by the offender. Intoxication is so intense that it overrides or seriously impairs the capacity to consent, and the offender takes advantage of that state. This is where Art. 178 CP operates.
• Surreptitious administration of alcohol. Where the victim is made to drink without their knowledge or by deception in order to weaken their will, the conduct approaches classic chemical submission.
• Exploiting a state of unconsciousness. If the person is unconscious or wholly unable to react, there is no room for valid consent.

The criminal dividing line is not drawn by the fact of having drunk, but by the serious loss of the capacity to consent and the offender's conscious exploitation of that state.

Disinhibition should not be confused with incapacity. Alcohol lowers inhibitions and may lead to decisions later regretted; that is not, in legal terms, the same as being unable to consent. A disinhibited but conscious, oriented and decision-capable person gives valid consent. The incapacity that matters in criminal law is something else: it means intoxication has reached a degree at which the will is no longer free or able to comprehend the act. Telling these two planes apart —later regret as against the absence of capacity at the time— is one of the most delicate and most decisive tasks in the proceedings, and it must rest on objective data rather than after-the-fact impressions.

Why there is no single level that overrides consent

Unlike road safety, where objective thresholds exist, in the sexual context there is no legally fixed alcohol level above which incapacity to consent is presumed. The assessment is always individualised, because the same level can affect two people very differently depending on their tolerance, weight, physical state or the pace of drinking.

This has a practical consequence of the first order: a high level does not on its own establish incapacity, nor does a moderate level automatically exclude it. What the court assesses is the real capacity to consent at the time of the events, reconstructed from the evidence as a whole.

The evidence: from the test to the medical expert report

By their very nature, these events usually take place in private, which puts the evidence at the centre of the proceedings. The elements typically handled are:

• Blood or urine tests and, where possible, the retrospective calculation of the level at the time of the events from the alcohol elimination curve (as a guide, around 0.15 g/l per hour).
• Reconstruction of the drinking: number and type of drinks, time interval, receipts, bills and witness accounts of what the person consumed.
• Security cameras and witnesses that allow the victim's physical state to be observed (gait, speech, orientation) before and after the events.
• Medical expert evidence correlating the estimated level with the real capacity to consent, taking individual tolerance into account.

Total anterograde amnesia —the so-called blackout, the complete absence of any memory of what happened— is a relevant indicator of incapacity, but not decisive on its own: a person may have no recollection and yet have acted with the appearance of will, which calls for careful analysis of the evidence as a whole.

Penalties: Art. 178, Art. 179 and the aggravating factors of Art. 180 CP

The classification and the penalty depend on the type of sexual act carried out:

Scenario	Penalties
Sexual assault without penetration (Art. 178 CP)	One to four years' imprisonment.
Rape: carnal access or insertion of body parts or objects (Art. 179 CP)	Four to twelve years' imprisonment; six to twelve years where the victim's will was overridden by any cause (Art. 179.2).
Aggravating factors of Art. 180 CP	Raise the ranges above (for example, joint action or special vulnerability): aggravated Art. 178 can reach two to eight years, and aggravated rape under Art. 179.1, seven to fifteen years.

The difference between one band and another is considerable, so the exact classification of the events is as important as the debate over whether or not there was consent. That is why it is advisable to have, from the outset, criminal defence lawyers specialising in alcohol-facilitated submission who can handle the legal, evidential and forensic dimensions at the same time.

The defendant's intoxication and Art. 20.2 CP

Frequently the defendant had also been drinking. It is worth clarifying its legal effect: voluntary intoxication does not exempt from liability. Article 20.2 CP recognises full intoxication as a defence, but only where it is involuntary or accidental and wholly deprives the person of the capacity to understand the unlawfulness of the act or to act in accordance with that understanding. Someone who becomes intoxicated by their own choice is not exempt on that ground.

The defendant's voluntary intoxication may, depending on the case, be assessed as a mitigating circumstance if it significantly affected his faculties, but it never shifts responsibility onto the victim for having consumed alcohol.

Lines of defence against the charge

There is no single defence: each case dictates its strategy depending on the facts and the available evidence. Always within respect for the presumption of innocence, the most common lines are:

• Chronological reconstruction of the drinking and of the sequence of events, to pinpoint the person's state at each moment.
• Challenging the prosecution's expert evidence and producing an alternative expert report on the correlation between the estimated level and the capacity to consent.
• Establishing the real capacity to consent: showing, through witnesses, footage and communications, that the person retained a will capable of deciding.
• Reasonable mistake about capacity: analysing whether the defendant could reasonably have believed, in the circumstances, that consent existed, which bears on intent.
• Assessment of mitigating factors and scrutiny of the chain of custody of the biological samples and the digital evidence.

The severity of the penalties has an immediate procedural effect: in the early stages, pre-trial detention and precautionary measures may be considered. Legal involvement from the very first statement is therefore decisive, and the suspect should scrupulously comply with any measure imposed, refrain from all contact with the complainant and channel every step through their lawyer.

Specialist defence with Alonso Sala

A charge of sexual assault linked to alcohol consumption demands a technical response from the outset, because much of the outcome turns on the evidence and the correct classification of the events. At Alonso Sala, a criminal defence firm based in Madrid (calle Velázquez 27) with coverage throughout Spain, we approach this type of proceeding with rigour, discretion and a detailed analysis of the expert evidence and the real capacity to consent. Each matter is studied individually, in light of its specific circumstances and the legal framework in force after the most recent reforms, in order to build the defence strategy that best fits the facts.