Kein vs. Nicht: German Negation Rules

Kein and nicht both translate to “not” in English — but German makes you choose the right one every time. In this lesson, we cover the core rule for when to use each word, then look at the exceptions that trip up most beginners.

The Basic Rule: Nouns vs. Everything Else

Kein negates a noun that would otherwise take ein or no article at all: Ich habe einen Hund. → Ich habe keinen Hund. Ich habe Zeit. → Ich habe keine Zeit. Kein declines exactly like ein (kein, keine, keinen, keinem...), matching the noun's gender and case. Nicht negates everything else: verbs, adjectives, adverbs, and whole sentences.

When Nicht Negates a Noun

Not every noun takes kein. A noun with a definite article (der/die/das) or a possessive article (mein/dein...) is negated with nicht instead: Das ist nicht der Bus. Das ist nicht mein Auto. Since every kein/nicht choice depends on which article the noun already has, it helps to be confident with der, die, das and gender first.

A Few Tricky Cases

To negate liking something, use nicht gern, not “kein gern”, since gern is an adverb: Ich spiele nicht gern Fußball. And some fixed phrases with kein are simply idiomatic, like Kein Problem! (No problem!) — Problem has no article here, so kein applies as normal, it just reads like a set expression.

Frequently Asked Questions

What is the basic rule for kein vs. nicht in German?

Kein negates a noun that would take “ein” or no article at all, while nicht negates verbs, adjectives, adverbs, and nouns that already have a definite or possessive article.

How does kein change according to gender and case?

Kein declines exactly like ein: kein, keine, keinen, keinem, and so on, matching the gender and case of the noun it negates.

Do you say “kein” or “nicht” with a definite article?

Nicht — nouns with a definite article (der/die/das) or a possessive article (mein/dein...) are negated with nicht, not kein, e.g. Das ist nicht der Bus.

How do you negate a verb in German?

With nicht, usually placed after the verb or at the end of the clause, e.g. Ich verstehe nicht.

Is “Kein Problem” an exception to the rule?

Not really — Problem has no article here, so kein applies normally; it's simply a fixed, frequently used phrase.

Once kein vs. nicht feels natural, the next challenge is word order — see our full breakdown of where nicht goes in a German sentence, or start from the beginning with our A1 German course.