B1 for German Citizenship: Which Language Proof You Need
For German citizenship you must normally prove German at level B1 under §10 of the Nationality Act. A Goethe, telc or ÖSD B1 certificate counts, as does a DTZ result at B1 or a German school, vocational or university qualification. Exceptions exist for age, illness and the guest-worker generation. B1, not C1, is the standard.
What level of German does citizenship require?
Naturalisation under §10 of the German Nationality Act (StAG) requires 'sufficient knowledge of German', and in practice the authorities read that as level B1 of the Common European Framework. B1 is the rule for almost every adult applicant: you do not need C1, and a higher certificate brings no extra legal advantage.
The language proof is one requirement among several. Since 30 October 2025 a single minimum residence period of five years applies to everyone, after the Bundestag abolished the three-year 'fast-track' naturalisation for people with C1 and outstanding integration on 8 October 2025 — with no transitional rule, so it is gone even for applications already filed. Alongside B1 you must also pass the Einbürgerungstest, cover your living costs without SGB II or SGB XII benefits, have a clarified identity, no serious criminal record, and declare your commitment to the free democratic constitutional order. Dual citizenship remains permitted.
Which certificates are accepted as language proof
Four B1 certificates are accepted everywhere: the Goethe-Zertifikat B1, telc Deutsch B1, the ÖSD-Zertifikat B1 and the Deutsch-Test für Zuwanderer (DTZ) when the result is B1. A Goethe, telc or ÖSD exam usually costs €150–€250; the DTZ is free at the end of an Integrationskurs and around €120–€250 if you sit it externally. None of these certificates expires, so a B1 you passed years ago still counts.
You do not always need an exam. A German school-leaving certificate, completed German-language vocational training (Ausbildung) or a German-language university degree replaces the B1 proof. One detail trips up many applicants: the DTZ is graded separately for the written and the oral part, and a certificate showing A2 in one of them is normally not accepted as B1 proof — you would have to resit. Check with your local Einbürgerungsbehörde before you book anything.
Exceptions: when B1 is not required
§10 StAG waives the requirement if you cannot meet it because of a physical, mental or psychological illness, a disability, or your age. This is decided case by case and normally needs a supporting medical certificate.
There is a specific rule for the guest-worker generation: if you came to West Germany as a guest worker by 30 June 1974, or to the GDR as a contract worker by 13 June 1990 — and for the spouses who joined them — it is enough to communicate orally in everyday German, and the Einbürgerungstest is not required. Children under 16 naturalised together with a parent need no B1 certificate either: age-appropriate German development, usually shown by school reports, is sufficient and they take no Einbürgerungstest. From 16 on, a young person needs their own proof.
How to actually reach B1
The usual route is the Integrationskurs: 700 teaching units (Unterrichtseinheiten) of 45 minutes — 600 of language plus a 100-unit orientation course — ending with the DTZ and the 'Leben in Deutschland' test. The cost contribution is €2.29 per unit (about €1,600), waived if you receive Bürgergeld or are in financial need, and half of it is refunded if you pass the final test within two years.
Zero to B1 is roughly 600 teaching units ≈ 450 clock hours. In an intensive course of 20–25 units a week that is about 6–9 months; studying on your own for about an hour a day it is usually 12–18 months. Whichever route you take, daily contact with the language matters far more than which course you pick — and speaking is the part most applicants under-practise, even though the oral section is where B1 is won or lost.
Frequently asked questions
Is B1 enough for German citizenship, or do I need C1?
B1 is the standard requirement under §10 StAG and it is enough. C1 only ever mattered for the three-year fast-track naturalisation, and that route was abolished on 30 October 2025, so a higher certificate no longer shortens the five-year residence period.
Does the DTZ certificate count as proof of German for citizenship?
Yes, if your DTZ result is B1. The DTZ is graded separately for the written and the oral part, and a certificate showing A2 in one part is normally not accepted as B1 proof; in that case you can resit the exam externally for roughly €120–€250.
How long does it take to reach B1 from zero?
About 600 teaching units of 45 minutes, roughly 450 clock hours. That is 6–9 months in an intensive course of 20–25 units per week, or typically 12–18 months of self-study at about one hour a day.