The short answer
You can enrol from the age of 16 years and 6 months. Starting about four to six months before the day you actually need the licence makes sense — the application, the theory and the practical run in parallel, but the authority and the available test dates set part of the pace. Autumn and winter are the quietest months.
Almost everybody enrols once the licence is already needed: the apprenticeship contract is signed, the university town is decided, the job starts in the summer. That is the latest possible moment and the most expensive one, because from then on every day of waiting hurts.
The age limits
- Enrolling: from 16 years and 6 months, for class B as for BF17
- Theory test: at the earliest three months before the minimum age for the class
- Practical test: at the earliest one month before the birthday on which you reach the minimum age
- Driving: at 17 accompanied via BF17, at 18 on your own
So for the youngest there is more than a year between enrolment and the earliest possible test — and that year is exactly why an early start with BF17 costs nothing and only takes the pressure off. Whether the early start is worth it is a post of its own.
Counting backwards
Take the day you have to be able to drive and work back from there: practical test, before it the twelve special drives, before those the practice lessons, before those the theory test, and right at the beginning the application at the licensing authority — the one step whose duration nobody controls. Four to six months is a realistic buffer; how the duration adds up is set out separately.
It is always the same two: early January and straight after the summer holidays. And every spring the same year group arrives at once — everybody wants the licence for their school leaving exams, everybody wants a test date in June. Start in the November before and you do the same training with far more calm, and get dates that are fought over in May.
Why autumn is good
Because two things come together: appointments are easier to get than in spring, and the three compulsory night drives can be done in passing in winter, because it gets dark early. In June a night drive in Düsseldorf starts no earlier than about 10 pm — which is why summer training so often drags at the very end.
The one real reason to wait
If you know the coming months will not allow regular driving. Two lessons a week over three months take you further than fourteen lessons in one summer with a six-month gap in front of them — and cost less.
If you know your deadline we count back together at the first conversation. After that signing up has a date attached rather than a feeling.
What to take away
The right moment to start does not come from how you feel about it, it comes from your deadline minus six months. Do that sum once and you never lose weeks again to an authority you brought in too late.