Drugs and blood tests in Germany: THC limits and their impact on your driving licence
In Germany, driving under the influence of cannabis is considered a serious traffic offence, especially when the active ingredient THC (Tetrahydrocannabinol) is detected in the blood.
Because THC affects perception, concentration and reaction time, the traffic authorities handle such cases with maximum strictness.
What is the legal THC limit in the blood?
The threshold at which a driver is considered to be in violation is:
1.0 ng/ml of THC in blood plasma
(1.0 ng/ml THC im Blutplasma)
This limit is very low and is sufficient on its own to trigger sanctions, even if no dangerous behaviour was observed while driving.
What happens if this limit is exceeded?
Legal and administrative consequences:
| Situation | Fine (€) | Flensburg points | Driving ban / licence |
|---|---|---|---|
| THC > 1.0 ng/ml, no accident | €500 | 2 points | 1-month driving ban |
| Repeat offence | €1000–1500 | 2 points | driving ban of 3 months or more |
| Signs of habitual use or addiction | – | – | immediate licence withdrawal + mandatory MPU |
A positive blood test may lead to:
Immediate notification of the licensing authority (Führerscheinstelle)
A requirement to undergo a medical-psychological assessment (MPU) to prove that you are fit to drive
Administrative withdrawal of your licence, even without a formal criminal conviction
Refusal to reissue the licence unless you can prove long-term abstinence from cannabis
Driving days after consumption? Legally very risky
THC can remain detectable in the blood for several days, especially in cases of frequent or chronic use.
This means that even if you no longer feel high, a blood test may still show a value above 1.0 ng/ml, with all corresponding consequences.
What about medical cannabis?
Even if you use cannabis on prescription, you are not automatically exempt from responsibility. You must be able to show that:
you have a valid legal prescription
you were not impaired in a way that affects your driving ability
your health condition and medication are compatible with driving
Otherwise, even medical cannabis can lead to severe problems with your driving licence.
Conclusion
In Germany, having more than 1.0 ng/ml THC in your blood while driving is enough to put your driving licence at immediate risk, even without an accident.
Repeated incidents or evidence of regular consumption can result in a long-term or permanent withdrawal of the licence and extensive MPU requirements.
If you consume cannabis for any reason, the legally safest option is to refrain completely from driving until all traces of the substance have left your body.
The editorial team of this website strives to provide accurate information based on thorough research and multiple sources. Nevertheless, errors or incomplete data may occur. Please regard the information in this article as an initial reference and always consult the competent authorities for binding and up-to-date information.
