Section 183a of the German Criminal Code (§ 183a StGB) makes it a criminal offense to perform sexual acts in public that intentionally or knowingly offend common decency, with a penalty of up to one year in prison or a fine.1Gesetze im Internet. German Criminal Code (Strafgesetzbuch – StGB) The provision is narrower than it looks: it does not criminalize nudity on its own, and it steps aside when the more specific exhibitionism statute under § 183 StGB applies.
What § 183a Actually Criminalizes
The statute reads: “Whoever performs sexual acts in public and thereby intentionally or knowingly offends common decency incurs a penalty of imprisonment for a term not exceeding one year or a fine.”1Gesetze im Internet. German Criminal Code (Strafgesetzbuch – StGB) A conviction requires three elements to line up.
First, the conduct must be sexual in nature. Masturbation, intercourse, and comparable physical sexual behavior clearly qualify. Second, it must happen in a public setting, meaning a place accessible to or observable by an indeterminate number of people. A park, a plaza, or a train car all count. Third, the act must actually offend someone. German courts use an “objective third party” standard, asking whether a reasonable person witnessing the act would have their sense of decency violated. The yardstick is contemporary community values, not the most prudish or the most permissive observer. If no one witnesses the conduct, or those who do are unbothered, the offense element generally fails.
The mental element matters too. The offender must act intentionally or knowingly with respect to the offense caused. Accidental exposure or conduct the actor could not reasonably expect to be observed falls outside the statute.
Nudity Alone Is Not a § 183a Offense
Simple nudity and a sexual act are not the same thing under German law, and the gap between them is wide. Germany has a long tradition of Freikörperkultur (FKK), and non-sexual public nudity is not listed as a criminal offense in the Strafgesetzbuch. Designated nude bathing areas, nude sections of parks, and nude saunas are common and entirely legal. Even outside those zones, a person sunbathing nude in a park does not automatically commit a crime.
For § 183a to apply, the conduct has to cross from mere nudity into something sexual. Standing naked at a bus stop does not reach the criminal threshold on its own. It can still trigger a regulatory fine, which is a separate track discussed below.
When § 183 Applies Instead
Section 183a contains a subsidiarity clause: it applies “unless the act is liable to a penalty under section 183.”1Gesetze im Internet. German Criminal Code (Strafgesetzbuch – StGB) When the conduct fits the narrower exhibitionism offense, prosecutors charge under § 183 and § 183a stays in reserve as the catch-all for public sexual conduct that does not match the exhibitionism definition.
Section 183 provides that “a man who vexes another person by committing an act of exhibitionism incurs a penalty of imprisonment for a term not exceeding one year or a fine.”1Gesetze im Internet. German Criminal Code (Strafgesetzbuch – StGB) The hallmark is a directed, confrontational encounter: a man exposes his genitals to a specific unwilling observer, typically with intent to shock or to derive sexual gratification from the reaction. The victim does not need lasting harm, but genuine vexation must be present.
Two features of § 183 shape when and how it is used. The statute is written to apply only to men. A woman who commits exhibitionist conduct is not charged under § 183 itself, though she can be prosecuted under § 183a or other applicable provisions. And § 183 is primarily an Antragsdelikt: prosecution generally requires the victim to file a formal written complaint (Strafantrag), unless prosecutors determine that a special public interest requires them to act on their own.2Gesetze im Internet. Strafgesetzbuch § 183 – Exhibitionistische Handlungen That public-interest exception commonly comes into play when the offender has prior convictions, the act occurred near children, or the circumstances were particularly aggressive.
Section 183a works the other way. It is an Offizialdelikt, meaning once prosecutors learn about an incident they are obligated to investigate and, if the evidence supports it, bring charges. No complaint from a victim or witness is required.
Penalties and the Day-Fine Calculation
A conviction under § 183a carries up to one year in prison or a fine.1Gesetze im Internet. German Criminal Code (Strafgesetzbuch – StGB) For first-time offenders, fines are far more common than custody. Fines are set through Germany’s day-fine system (Tagessätze), which ties the punishment to both the seriousness of the offense and the offender’s financial position.
The court works in two steps. It first sets the number of daily units based on the gravity of the offense and the offender’s culpability. Under § 40 StGB, the range runs from a minimum of 5 to a maximum of 360 units. It then fixes the value of each unit based on the offender’s net daily income, calculated by dividing monthly net income by 30. The daily rate can be as low as €1 or as high as €30,000. The total fine is the number of units multiplied by the daily rate. Some courts reduce the daily rate by roughly 10 to 15 percent for each dependent child, though the practice is not standardized.
Actual prison time is reserved for repeat offenders or cases with aggravating factors: conduct near schools or playgrounds, acts directed at children, or a pattern of escalating behavior. Courts also weigh whether the defendant has voluntarily sought therapy or shown genuine accountability.
Therapy as an Alternative to Prison
Section 183 includes a treatment-oriented sentencing option that reflects the medical understanding of exhibitionism as a condition that often responds to therapy. Under § 183(3), the court may suspend a prison sentence on probation “if there is reason to believe that the offender will only cease to commit acts of exhibitionism after lengthy medical treatment.”3Gesetze im Internet. German Criminal Code (Strafgesetzbuch – StGB) – Section 183
That option is not confined to men charged under § 183. Section 183(4) extends it to any man or woman convicted “because of an exhibitionist act” under other provisions carrying a maximum sentence of one year.1Gesetze im Internet. German Criminal Code (Strafgesetzbuch – StGB) A defendant whose clinical evaluation supports the likelihood of recidivism without treatment, and who shows willingness to undergo it, stands a meaningfully better chance of avoiding imprisonment.
The Regulatory Fallback Under § 118 OWiG
Not every act of public indecency rises to the criminal threshold. Conduct that disturbs public order but does not involve a sexual act may be handled as a regulatory offense (Ordnungswidrigkeit) under § 118 of the Act on Regulatory Offences, which covers anyone who “commits a grossly offensive act which is likely to disturb or endanger the public and to prejudice public order.”4Gesetze im Internet. Act on Regulatory Offences (Gesetz über Ordnungswidrigkeiten – OWiG)
This is the usual provision for non-sexual public nudity that causes a disturbance. The general OWiG fine range is €5 to €1,000 unless a specific statute sets a different maximum.4Gesetze im Internet. Act on Regulatory Offences (Gesetz über Ordnungswidrigkeiten – OWiG) A regulatory offense does not produce a criminal conviction and does not appear on a standard certificate of conduct (Führungszeugnis). For anyone facing allegations, that difference between § 118 OWiG and § 183a StGB has real practical weight.
Deadlines That Matter
Both § 183 and § 183a carry a maximum penalty of one year, which places them in the catch-all sentencing bracket under § 78(3) StGB with a three-year limitation period.5Gesetze im Internet. German Criminal Code (Strafgesetzbuch – StGB) – Section 78 Once three years have passed since the act, prosecution is barred.
For § 183 cases, a tighter deadline runs first. A victim who wants to request prosecution must file the Strafantrag within three months from the date they learn both about the offense and the identity of the offender.6Gesetze im Internet. German Criminal Code (Strafgesetzbuch – StGB) – Section 77b If the deadline falls on a weekend or public holiday, it extends to the next working day.7Federal Ministry of Justice and Consumer Protection. Request to prosecute Missing the three-month window bars the victim from requesting prosecution, though the state can still proceed on its own under the public-interest exception. Because § 183a is prosecuted ex officio, the three-month complaint rule does not restrict it; only the three-year limitation period does.