Capitalization & Spelling Rules
In German, capitalization is not just a style choice — it is a grammatical rule that lets you instantly identify nouns in a sentence. Unlike English, where only proper nouns and the word I are always capitalized, every single noun in German gets a capital letter, no matter where it falls.
Spelling rules, especially the choice between ß and ss, trip up English speakers at every level. Mastering these two areas will sharpen your reading, make your writing look native, and eliminate the telltale errors that mark non-native text.
All Nouns Are Capitalized
Every noun in German — common, abstract, or compound — is written with a capital first letter. There are no exceptions based on position or frequency.
| English | Correct German | Common Error |
|---|---|---|
| the house | das Haus | das haus |
| a dog | ein Hund | ein hund |
| freedom | die Freiheit | die freiheit |
| the weather | das Wetter | das wetter |
This rule also covers nominalized words — verbs and adjectives that are promoted to noun status by an article. When a word acts as a noun, it earns a capital:
| Base word | Nominalized form | Meaning |
|---|---|---|
| schreiben (to write) | das Schreiben | the writing / a letter |
| gut (good) | das Gute | the good / goodness |
| reisen (to travel) | das Reisen | traveling |
| alt (old) | ein Alter | an old man |
A practical check: if you can place der/die/das/ein/eine in front of it, capitalize it.
The Formal 'Sie' and Special Capitalization Cases
The formal pronoun Sie (you, formal singular and plural) is always capitalized in all its forms, to distinguish it from sie (she/they).
| Form | Formal Sie (capital) | sie = she/they (lowercase) |
|---|---|---|
| Nominative | Sie kommen morgen. | sie kommt morgen. |
| Accusative | Ich rufe Sie an. | Ich rufe sie an. |
| Dative | Ich helfe Ihnen. | Ich helfe ihnen. |
| Possessive | Ihr Termin | ihr Termin |
Confusing lowercase sie for formal Sie changes the entire meaning of a sentence.
Other capitalization notes:
- Days of the week and months are nouns: Montag, Dienstag, Januar, Oktober
- Nationality adjectives modifying a noun stay lowercase: ein deutsches Auto, die englische Sprache
- Nationality words used as nouns are capitalized: ein Deutscher (a German man), eine Engländerin (an English woman)
ß vs. ss — The Vowel Length Rule
The letter ß (called Eszett or scharfes S) and the digraph ss both represent the same /s/ sound. The rule for choosing between them:
ß after a long vowel or diphthong — ss after a short vowel
| Vowel type | Word | Meaning | Why |
|---|---|---|---|
| Long vowel (a:) | die Straße | street | long ā |
| Long vowel (o:) | groß | big | long ō |
| Long vowel (i:) | Fuß | foot | long ū (oo) |
| Diphthong (aɪ) | heißen | to be called | ei = diphthong |
| Short vowel (a) | das Wasser | water | short a |
| Short vowel (ʏ) | müssen | must | short ü |
| Short vowel (ɛ) | essen | to eat | short e |
Quick test: mentally stretch the vowel. Straaaaaße sounds natural → use ß. Waaaaaasser sounds unnatural → use ss.
Reform note: The 1996 spelling reform removed many old uses of ß after short vowels. daß → dass, muß → muss, paßt → passt. If you see the old forms in pre-1996 texts, do not copy them.
Swiss note: Switzerland and Liechtenstein do not use ß at all — they write ss everywhere (Strasse, grossen). Both are regionally correct.
📖 Examples
Mein Hund frisst das Essen sehr schnell.
My dog eats the food very quickly.
Die Straße vor unserem Haus wird nächste Woche repariert.
The street in front of our house will be repaired next week.
Haben Sie Ihr Buch mitgebracht, Herr Müller?
Did you bring your book, Mr. Müller? (formal)
Das Schreiben von E-Mails auf Deutsch ist gar nicht so schwer.
Writing emails in German is not that hard at all.
Ich muss morgen früh aufstehen, weil ich einen wichtigen Termin habe.
I have to get up early tomorrow because I have an important appointment.
Das Gute an dieser Stadt ist die frische Luft und die ruhigen Straßen.
The good thing about this city is the fresh air and the quiet streets.
Wir treffen uns jeden Montag im Café an der Hauptstraße.
We meet every Monday at the café on the main street.
Sie spricht fließend Deutsch, aber ich lerne noch.
She speaks German fluently, but I am still learning.
⚠️ Common Mistakes
ich esse gern pizza und trinke jeden morgen kaffee.Ich esse gern Pizza und trinke jeden Morgen Kaffee.
All nouns must be capitalized in German regardless of position. 'Pizza', 'Kaffee', and 'Morgen' (morning used as a noun) all need capital letters. Sentences also begin with a capital letter.
Das Wasser ist heiss.Das Wasser ist heiß.
'heiß' ends with the diphthong 'ei' /aɪ/, which counts as a long sound. After a diphthong, German uses ß, not ss or the plain letter s.
Sprechen sie Deutsch, Frau Weber?Sprechen Sie Deutsch, Frau Weber?
The formal second-person pronoun 'Sie' is always capitalized. Lowercase 'sie' means 'she' or 'they', which completely changes the meaning of the sentence.
ein Deutsches Auto und ein Englischer Filmein deutsches Auto und ein englischer Film
Nationality adjectives that describe a noun (attributive use) are NOT capitalized in German. They only become capitalized when used as nouns themselves, e.g., 'ein Deutscher' (a German man).
✏️ Exercises
Test your understanding. Click an option or type your answer, then check.
Which sentence uses capitalization correctly?
Which word is spelled correctly?
How is 'the street' written correctly in German?
Which sentence correctly addresses someone formally?
Which sentence uses the nationality adjective correctly?
Which word is spelled correctly according to modern German spelling rules?
Das ___ (schreiben) von Briefen ist eine alte Tradition.
Ich ___ (müssen) morgen früh aufstehen, weil der Zug um sechs Uhr fährt.
Das ___ (gut) an dieser Idee ist, dass sie sehr einfach umzusetzen ist.
Wir essen heute Abend in dem neuen Restaurant an der ___ (hauptstraße).