Capitalization Rules: Sentence and Name Decisions

Reviewed by the Grammarlyzer Editorial Team · Our Review Standards · Published January 22, 2026 · Updated July 16, 2026

Choose capitals by sentence role, name status, and the style governing titles.

Quick Answer

Capitalize: the first word of a sentence, proper nouns, formal titles directly before names, days and months, and the words required by the title style you follow.

Keep lowercase: common nouns, seasons used generically, and professional titles used generically or after a name. Title capitalization is style-specific, so apply one named guide consistently.

Memory Trick: Capitalize sentence starts and proper nouns; keep common words lowercase.

🔑 Key Takeaway

Capitalize proper nouns and the first word of sentences; keep common nouns and generic titles lowercase.

Quick Comparison

Case What to Do Quick Check
Required capitals Capitalize sentence starts, proper nouns, titles before names, and official title words. If the word is a specific name or starts the sentence, capitalize it.
Keep lowercase Leave seasons, generic job titles, and common nouns lowercase unless a title rule overrides them. If the word is generic rather than a specific name, keep it lowercase.

Common Mistakes

❌ Incorrect:

We're traveling to europe in the Spring.

✓ Correct:

We're traveling to Europe in the spring.

Two errors at once: "Europe" is a proper noun (capitalize), but seasons like "spring" stay lowercase. People often reverse both.
❌ Incorrect:

I asked my Manager, and then I met president Lee.

✓ Correct:

I asked my manager, and then I met President Lee.

A job title stays lowercase when it's generic ("my manager"), but capitalizes when it's a title directly before a name ("President Lee").
❌ Incorrect:

My favorite book is the lord of the rings.

✓ Correct:

My favorite book is The Lord of the Rings.

The ninth-edition MLA rule capitalizes the first word, last word, and principal words. Apply the current details of the style guide required for your document.
❌ Incorrect:

I study Biology and French at university.

✓ Correct:

I study biology and French at university.

General subjects such as biology stay lowercase, while names of languages and nationalities such as French are proper nouns and take capitals.

🎯 Test Your Knowledge

1. "I love hiking in the ___." (autumn/Autumn)

2. "We visited the ___ last summer." (grand canyon)

3. "Thank you, ___ Patel." (doctor, before a name)

4. "She is a ___ at the hospital." (nurse, generic)

5. "He's learning ___." (spanish)

Live Check: Catch Capitalization Slips in Real Text

In our July 15 browser test, Grammarlyzer marked all three lowercase forms in this exact sentence: the sentence start as Capitalization, and monday and london as Spelling. Each diagnostic suggested the corresponding capitalized form.

The correct version is: Last Monday, we flew to London for a conference. Capitalize the first word of the sentence, the day "Monday," and the place name "London."

The corrected sentence returned no issues. This one test establishes the three displayed results; it does not establish detection of every proper noun, title, or contextual capitalization choice.

Source-Backed Decisions That Need More Than One Slogan

MLA’s noun guidance distinguishes common nouns from proper nouns. Separate pages cover lowercase seasons, professional titles, and ninth-edition title capitalization. MLA’s page on directions versus regions describes an older edition, while a current Chicago Q&A shows why recognized and generic regional labels can differ. Consult the current required guide when a regional label is uncertain.

A practical order

First check the sentence start. Then ask whether the word is a specific name or a common category. Finally, apply the relevant style rule for professional titles and titles of works.

Frequently Asked Questions

Are seasons like spring and summer capitalized?

Seasons are normally lowercase because they are common nouns. Capitalize one when it is part of a proper name or a formally titled event.

When is a professional title capitalized?

Capitalize a formal title used directly before a person's name, as in President Lee. Lowercase a title used generically or after the name, unless a house style requires another treatment.

Which words are capitalized in a title of a work?

The ninth-edition MLA guidance says to capitalize the first word, the last word, and all principal words. For the treatment of other words, apply the current rules of your required style guide consistently.

Five Separate Capitalization Decisions

Sentence position: capitalize the opening word. Name status: capitalize a proper noun but not the common category it belongs to.

Professional title: check whether it directly precedes a name. Title of a work: apply the named style guide. Contextual category: distinguish a direction from a named region and a generic season from a formal event name.

Do not use importance as the test

A word does not become a proper noun merely because it matters in the document. Identify its grammatical and naming role.

Real-World Examples

📏 Proper Nouns:

She studied at Harvard University in Boston.

Harvard University and Boston are specific names.
📏 Titles with Names:

President Kim announced the policy. vs The president announced the policy.

The formal title precedes a name in the first sentence and is generic in the second.
⚠️ Seasons:

I love spring in Korea. (NOT Spring)

A generic season name is lowercase; a season inside a proper name or formal event title can take a capital.
⚠️ Directions:

Go north on the highway. vs She grew up in the South.

Use lowercase for a compass direction. Capitalize a recognized regional name; when the label is debatable, follow the current required style guide.
❌ Over-capitalizing:

The Manager sent an Email about the Meeting.

Wrong: common nouns like manager, email, meeting are not capitalized
💡 Rule:

When in doubt: is it a specific, unique name? → Capitalize. Is it a general category? → Lowercase.

The specific-versus-general test handles proper nouns; professional and work titles still require their own style rules.

The Over-Capitalization Trap in Business Writing

Business documents sometimes capitalize generic roles or document terms because the writer wants emphasis. Importance alone does not make manager, email, or meeting a proper noun. Check whether the term is an official name, a defined term governed by a house style, or an ordinary common noun.

For more practice, see Apostrophe Rules and Comma Rules.

Related Articles

Check Your Capitalization Now

In the recorded test, the checker marked the lowercase sentence start, day, and city in the displayed sentence. Use the manual name and style tests for other contexts.

Try Grammar Checker Free →