Capitalization rules
Capital letters mark the start of a sentence, proper nouns (specific names of people, places, organisations, days, months, and languages), the pronoun 'I', and the first word of a direct quotation. Common nouns (general words like city, teacher, or season) stay lowercase even when they refer to something specific.
How to use capitalization rules
When do you capitalize the first word of a sentence and 'I'?
Always capitalize the first letter of a new sentence, no matter how short the sentence is, and always capitalize the pronoun 'I' wherever it appears in a sentence, not just at the start.
- I left my umbrella on the train. It was raining hard when I noticed.
- my friend and i are planning a trip to Hanoi.→ My friend and I are planning a trip to Hanoi.
Which nouns are proper nouns and always take a capital letter?
Capitalize proper nouns: the specific, one-of-a-kind name of a person, place, organisation, nationality, language, day, or month: Istanbul, Ramadan, the United Nations, Portuguese, Tuesday, September.
The common noun equivalent of the same idea stays lowercase: a city, an organisation, a language, a weekday, a month; only the specific name is capitalized, not the category it belongs to.
- We're meeting on Tuesday to discuss the São Paulo conference.
- we're meeting on tuesday to discuss the conference.→ We're meeting on Tuesday…
- My neighbour speaks fluent Portuguese and a little Turkish.languages are proper nouns
Do seasons, decades and general time words take a capital letter?
Seasons (spring, summer, autumn, winter) are common nouns in English and stay lowercase, even though months and days are capitalized. The same applies to general periods like 'the twenty-first century' or decades written as words.
- The festival takes place every summer in Manchester.seasons stay lowercase
- The Festival takes place every Summer in Manchester.neither 'festival' nor 'summer' is a proper noun → the festival … every summer
When do job titles and family words take a capital letter?
Capitalize a title or family word only when it's used as part of someone's name or directly in place of it: 'President Kagame', 'I asked Mum'. When the same word is used generally, describing a role rather than naming someone, it stays lowercase.
- I asked my mum if Doctor Aziz was available this afternoon.'mum' general → lowercase; 'Doctor Aziz' = title + name → capital
- I asked my Mum if the doctor was available this afternoon.'Mum' isn't used as a name here → my mum; the doctor is general → lowercase
How do you capitalize the title of a book, film or report?
In the title of a book, film, article, or report, capitalize the first word, the last word, and every important word in between: nouns, verbs, adjectives, adverbs. Short articles (a, an, the), short prepositions (of, in, on) and coordinating conjunctions (and, but) stay lowercase unless they open or close the title.
- She's reading 'The Old Man and the Sea' for her literature class.
- She's reading 'The Old Man And The Sea' for her literature class.short words like 'and' and 'the' inside a title normally stay lowercase
How do you capitalize quotations and acronyms?
Capitalize the first word of a direct quotation if it begins a full sentence, and write acronyms and initialisms fully in capital letters: NASA, IELTS, UNESCO.
- The manager said, “We will announce the results on Friday.”
- I'm sitting the Ielts exam next month in Istanbul.→ I'm sitting the IELTS exam next month in Istanbul.
Common mistakes with capitalization rules
Find what is wrong in each one, then open it to check.
1i really enjoyed the trip to lagos last spring.What's wrong? Show the fix
I really enjoyed the trip to Lagos last spring.
Both 'I' and the proper noun 'Lagos' need capital letters; 'spring' correctly stays lowercase as a season.
2My Father works as an Engineer in Manchester.What's wrong? Show the fix
My father works as an engineer in Manchester.
'Father' and 'engineer' are used generally here, not as titles attached to a name, so both stay lowercase; only 'Manchester' is a proper noun.
3We celebrate new year's eve with fireworks every year.What's wrong? Show the fix
We celebrate New Year's Eve with fireworks every year.
Named holidays are proper nouns and take capital letters on every important word: New Year's Eve.
4He studies Chemistry and history at university.What's wrong? Show the fix
He studies chemistry and history at university.
General school subjects are common nouns and stay lowercase, unlike the proper noun form of a language (e.g. French, which is also a nationality).
5The Doctor told me to rest for a Week.What's wrong? Show the fix
The doctor told me to rest for a week.
Neither 'doctor' (used generally, not as a title with a name) nor 'week' is a proper noun, so both stay lowercase.
6I'm learning english to prepare for the ielts exam.What's wrong? Show the fix
I'm learning English to prepare for the IELTS exam.
Languages (English) are proper nouns, and IELTS is an acronym; both need full capitalization.
7The company's Headquarters moved to the City Centre last Month.What's wrong? Show the fix
The company's headquarters moved to the city centre last month.
Headquarters, city centre and month are all common nouns here, not specific names, so none of them takes a capital letter.
Practise
Write your own
Write a sentence of your own with capitalization rules, about you, your studies or your town.
Capitalization rules in IELTS
Speaking
- Capitalization can't be heard, but examiners do notice whether you say proper nouns clearly and confidently: nationalities, languages and place names ('I'm Vietnamese, and I studied in Hanoi') are exactly the words that would be capitalized in writing.
- There's no direct capitalization penalty in Speaking, but consistent, natural stress on proper nouns supports pronunciation and intelligibility scoring.
Writing
- In Task 2, inconsistent capitalization of proper nouns (countries, nationalities, organisations) is marked as a punctuation error under Grammatical Range and Accuracy, even when the grammar itself is correct.
- Never capitalize common nouns for emphasis (e.g. 'the Government', 'the Internet' as a stylistic choice); in modern usage both stay lowercase unless referring to a specific named body, and over-capitalizing reads as inconsistent, not formal.