Effects of Cannabis Legalization on Consumption and Crime

Germany has not generally legalized cannabis, but rather opened up limited exceptions for adults to the generally continuing ban.

Since April 1, 2024, adults may possess up to 25 grams of cannabis outside their own home and up to 50 grams at their place of residence. A maximum of three living cannabis plants for private personal consumption is also permitted. Anyone who wants to understand how this model came about can find the development in the history of cannabis in Germany. (Source: Federal Ministry of Justice / Laws on the Internet, accessed 2026 – Cannabis Consumption Act)

The crucial difference from a commercial market: there are no freely accessible specialty stores for recreational cannabis. The KCanG only allows certain methods of acquisition and cultivation, in particular private home cultivation and communal cultivation in growing clubs.

The following actions remain generally prohibited:

• Sale and commercial trade in recreational cannabis

• Distribution to friends or acquaintances, even without payment

• Import and export of cannabis

• Possession and cultivation by minors

• Possession above the legal limits

• Production of THC extracts outside the legal exceptions

There are further gradations between the permitted amount, an administrative offense, and a criminal offense. This is why enforcement may feel different regionally, although the federal law applies uniformly. The legal uncertainties in the federal states offer a complementary assessment.

As of spring 2026, there is no statistically significant increase that clearly coincides with partial legalization.

A study published in 2026 analyzed 23 repeated surveys between spring 2022 and spring 2026. Among 35,957 respondents aged 14 to 64, both consumption within the past twelve months and daily or almost daily consumption remained largely stable. The evaluation examined whether the trend changed in a statistically recognizable way after the KCanG came into force; the researchers found no such trend shift. (Source: Kotz et al., 2026 – Cannabis use prevalence before and early after partial legalisation)

This is not a final all-clear. Two years is a short period for a comprehensive assessment, and survey data do not capture every consumption group equally well. In addition, home cultivation and growing clubs needed time to establish themselves as legal sources of supply in the first place.

Three points are important for the current balance:

• The data contradict the assumption of an immediate, general consumption surge.

• They do not prove that consumption patterns or risks cannot change in the long term.

• They do not allow any statement about whether individual groups have intensified their consumption.

Why do stable consumption figures still say little about risks?

Stable prevalence only means that significantly more people are not consuming – not that the quantity, THC content, or form of consumption remain unchanged.

Two people count equally in an annual prevalence, although one person tried it once and the other consumes highly potent products daily. For the health assessment, frequency, dose, age at the start of consumption, and form of consumption are therefore at least as relevant as the total number of consumers.

Another question concerns the sources of supply. In a survey of 1,478 people who had consumed cannabis in the previous year, about half obtained at least part of their cannabis from generally legal sources; however, only a minority used exclusively legal sources. This suggests a beginning shift, not a complete replacement of illegal offers. (Source: Manthey et al., 2025 – Legal and Illegal Sources of Cannabis in Germany Shortly After Legalisation)

Medical cannabis is not legally part of this recreational market. Medical cannabis pharmacies such as cannabispromed dispense cannabis medicines as part of a medical prescription; they are not points of sale for recreational cannabis. This separation is important so that medical treatment, private home consumption, and the respective legal limits are not confused.

Registered cannabis crime has fallen sharply, primarily because many previous possession and home cultivation cases are no longer criminal offenses.

In 2023, the police crime statistics recorded 215,865 offenses related to cannabis and preparations. In 2024, there were 101,345 cases – a decline of 53.1 percent. The Federal Criminal Police Office expressly points out that comparability is limited due to the change in the key content brought about by partial legalization. (Source: Federal Criminal Police Office, 2025 – Police Crime Statistics 2024)

For 2025, the BKA time series shows 42,909 registered cannabis offenses. This figure is also no direct measure of how much was illegally traded or consumed: It only reflects criminal offenses of which the police became aware and which were recorded according to the applicable offense keys. (Source: Federal Criminal Police Office, 2026 – Police Crime Statistics 2025, Time Series of Cases)

Anyone who asks, “How many cannabis offenses are there since legalization?” should therefore distinguish three things:

• Fewer registered cases mean a real relief for people who would have been prosecuted for small amounts of possession.

• The decline follows predominantly from the new legal situation and does not automatically prove less illegal trade.

• Police statistics only capture the visible field; the density of controls, investigation priorities, and recording keys influence the figures.

An additional effect: If simple possession offenses are eliminated, the composition of the remaining statistics changes. Trade, import, and distribution offenses can therefore emerge more strongly in proportion, even if their absolute number does not increase.

Has the black market become smaller due to partial legalization?

There are indications of a partial shift to legal sources of supply, but no reliable evidence that the black market has already shrunk significantly.

The second EKOCAN interim report does not yet expressly assess the consequences for organized crime conclusively. This is understandable: The reform is young, growing clubs had a delayed start, and legal offers do not meet demand comprehensively. The report summarizes research results that were available up to March 2026; this period is too short for a final assessment. (Source: Manthey et al., 2026 – EKOCAN: Second Interim Report on the Evaluation of the KCanG)

The current situation can be assessed as follows:

• Home-grown cannabis may divert some demand away from the illegal market.

• Medical cannabis is only available with a doctor's prescription and does not replace recreational sales.

• Growing clubs create legal options, but are not available everywhere.

• Friends, acquaintances and illegal suppliers remain relevant sources for many users.

The criminal justice impact thus consists of two parallel developments: simple acts of consumption are prosecuted significantly less often, while the fight against illegal trading structures remains necessary.

No general immediate increase in consumption among young people has been proven so far, but early intervention and prevention remain central challenges.

An analysis of twelve representative studies from 2008 to 2025 found no evidence of an immediate effect on the 12-month prevalence of cannabis use among young people one year after partial legalization. Although there was an increase among young men, this continued a trend that had already been in place for some time. (Source: Orth, Eckhardt and Nitzsche, 2026 – Trends in cannabis use among young people between 2008 and 2025)

At the same time, EKOCAN reports that young people who use cannabis accessed early intervention and counseling services significantly less often after the reform. Previously, police encounters sometimes led to contact with youth welfare services, the public prosecutor's office, or prevention programs. If this occasion is removed, it is a relief for occasional users; however, for problematic use, early access to support may be missing. (Source: Manthey et al., 2026 – EKOCAN: Second Interim Report on the Evaluation of the KCanG)

Parents and guardians should pay particular attention to:

• significantly more frequent or daily use,

• decreased performance, withdrawal, or persistent lack of motivation,

• use before school, training, or work,

• unsuccessful attempts to reduce use,

• repeated driving or riding as a passenger under the influence.

Not every experience of use leads to addiction or mental distress. However, regular or daily use in adolescence, especially when started early, is associated with higher risks of addiction as well as cognitive and social problems. Mental distress, the social environment, and individual vulnerabilities also play a role. (Source: Federal Centre for Health Education, 2024 – Cannabis Use Among Young People)

Whether cannabis can affect motivation and everyday life is discussed in more detail in the article Cannabis and Motivation.

Sale, distribution, import, consumption in protected zones, as well as possession and cultivation outside the legal limits, remain prohibited.

A typical misconception is: “If I have legally grown cannabis, I can give some to a friend.” This is not true. Cannabis from private home-grown cultivation is intended exclusively for personal consumption.

An everyday scenario illustrates the pitfalls: Lea harvests cannabis from two plants she grew herself and takes 20 grams to a party. Her possession may be within the permitted limit. However, if she gives five grams to her adult friend, the distribution is prohibited despite the legal home-grown cannabis. If she then drives home under the influence of THC, road traffic laws may also apply.

Five basic rules help provide legally sound guidance:

• Check quantities: maximum 25 grams when out and about and 50 grams at home.

• Do not give anything away: Giving away, gifting, or jointly procuring cannabis may also be unlawful.

• Observe protected zones: No consumption in the immediate presence of minors or at legally protected places and within sight of them.

• Store safely: Plants, flowers, and propagation material must be protected from children and third parties.

• Do not drive under the influence: From 3.5 nanograms of THC per millilitre of blood serum, driving a motor vehicle may generally constitute an administrative offense; stricter rules apply to persons under 21 and those in their probationary period.

Since effects and THC metabolism cannot be reliably assessed by intuition, Cannabis and Driving provides in-depth guidance. Mixed use is particularly difficult to predict; the Comparison of Cannabis and Alcohol shows why a simple ranking of risks is insufficient. (Source: Federal Ministry of Justice / Laws on the Internet, accessed 2026 – Cannabis Consumption Act) (Source: Federal Ministry of Justice / Laws on the Internet, accessed 2026 – Road Traffic Act)

The measurable consequences of partial legalization so far are clearly visible in criminal proceedings rather than in consumption. Cannabis offenses have decreased significantly because limited possession and home-grown cannabis are no longer generally criminal offenses for adults. At the same time, previous population data show no statistically significant break in trends in consumption that clearly coincides with the reform. However, the black market has not disappeared: legal sources of supply are gaining importance, but they do not yet fully meet demand. Regarding youth protection, the most important open question lies less in rising prevalence rates than in weaker access to early intervention. For adults, it remains crucial not to confuse partial legalization with full liberalization: trade, distribution, import, and driving under the influence remain prohibited.

The following original sources support the figures, study results, and legal information used in the article.

• (Source: Kotz et al., 2026 – Cannabis use prevalence before and early after partial legalisation)

• (Source: Orth, Eckhardt and Nitzsche, 2026 – Trends in cannabis use among young people between 2008 and 2025)

• (Source: Manthey et al., 2025 – Legal and Illegal Sources of Cannabis in Germany Shortly After Legalisation)

• (Source: Manthey et al., 2026 – EKOCAN: Second Interim Report on the Evaluation of the KCanG)

• (Source: Federal Criminal Police Office, 2025 – Police Crime Statistics 2024)

• (Source: Federal Criminal Police Office, 2026 – Police Crime Statistics 2025, Time Series of Cases)

• (Source: Federal Centre for Health Education, 2024 – Cannabis Use Among Young People)

• (Source: Federal Ministry of Justice / Laws on the Internet, accessed 2026 – Cannabis Consumption Act)

• (Source: Federal Ministry of Justice / Laws on the Internet, accessed 2026 – Road Traffic Act)