Confused about Who or Whom? You’re not alone! I know how frustrating it can be to pause in the middle of writing or speaking because you’re unsure which word is correct. I’ve been there too, second-guessing a sentence and wondering if it should be who or whom.
The good news is that the difference is much simpler than it seems once you understand the basic rule. You’re writing an email, preparing for an exam, or improving your English grammar, using the right word can make your communication more accurate and confident.
In this guide, I’ll explain the difference with easy rules, clear examples, and practical tips. By the end, you’ll know exactly when to use who and when to use whom without any confusion.
Quick Answer
The simplest way to remember the difference is this:
- Use who when referring to the subject of a sentence.
- Use whom when referring to the object of a verb or preposition.
For example:
- Who called you yesterday?
- Whom did you call yesterday?
A helpful trick is to replace the word with they or him/her:
- If they fits, use who.
- If him or her fits, use whom.
For example:
- He called you → Therefore, use who called you?
- You called him → Therefore, use whom did you call?
Meaning of “Who”
Who is a pronoun that refers to the subject of a sentence. The subject is the person performing the action.
In simple terms, if someone is doing something, you generally use who.
Examples:
- Who is coming to dinner tonight?
- Who wrote this article?
- Who wants a cup of tea?
- Who lives next door?
- Who won the football match?
In all these examples, the person represented by who performs the action.
British English Examples
- Who left their umbrella on the train?
- Who organised the meeting in London?
- Who prepared the report for the company?
American English Examples
- Who parked outside the office?
- Who ordered the pizza?
- Who designed this website?
Although the examples differ slightly in vocabulary and context, the grammar rule remains exactly the same in both British and American English.
Who as a Relative Pronoun
Besides questions, who also introduces additional information about a person.
Examples:
- The teacher who helped me was very kind.
- The doctor who treated my injury was excellent.
- The friend who visited yesterday lives nearby.
In these cases, who introduces a clause describing a person.
Meaning of “Whom”
Whom is the object form of who. It refers to the person receiving the action rather than performing it.
If a verb or preposition acts upon someone, whom is usually correct.
Examples:
- Whom did you invite to the party?
- Whom are you speaking to?
- Whom did the manager select?
- Whom should we contact for support?
In every example, the person represented by whom receives the action.
British English Examples
- To whom should I address the letter?
- Whom did the committee appoint?
- With whom are you travelling?
American English Examples
- Whom did the company hire?
- Whom are they interviewing today?
- To whom should I send the email?
Whom After Prepositions
One of the easiest places to identify whom is after prepositions such as:
- to
- with
- for
- by
- about
- from
- under
Examples:
- To whom does this package belong?
- With whom are you working?
- For whom was this gift intended?
- About whom were they talking?
These structures are especially common in formal writing.
Is “Whom” Becoming Less Common?
Yes, especially in spoken English.
In everyday American English, many people simply use who instead of whom.
For example:
Formal:
- Whom did you meet yesterday?
Informal:
- Who did you meet yesterday?
Although grammar experts may prefer whom, the informal version is widely accepted in conversation.
British English also shows this trend, although formal British writing still uses whom more frequently than casual speech.
Therefore, understanding whom remains useful even if you do not use it every day.
Keyword Comparison: Who vs Whom
Understanding the difference becomes easier when you compare the two directly.
| Feature | Who | Whom |
| Grammar role | Subject | Object |
| Performs action | Yes | No |
| Receives action | No | Yes |
| Matches with | He, She, They | Him, Her, Them |
| Common in speech | Very common | Less common |
| Formal writing | Common | Common |
| Informal conversation | Extremely common | Rare |
Examples
| Sentence | Correct Choice |
| ___ is calling you? | Who |
| You called ___? | Whom |
| ___ wrote the book? | Who |
| To ___ should I speak? | Whom |
| ___ wants coffee? | Who |
| You invited ___? | Whom |
The He/Him Test
The easiest method for deciding between who and whom is called the he/him test.
Step 1
Answer the question using either he or him.
Step 2
If the answer uses he, choose who.
Step 3
If the answer uses him, choose whom.
Example 1
Question:
- Who/Whom called the office?
Answer:
- He called the office.
Because he fits, the correct word is who.
Example 2
Question:
- Who/Whom did you invite?
Answer:
- I invited him.
Because him fits, use whom.
Example 3
Question:
- Who/Whom should receive the award?
Answer:
- He should receive the award.
Therefore, use who.
Example 4
Question:
- Who/Whom did the teacher praise?
Answer:
- The teacher praised him.
Therefore, use whom.
This trick works almost every time.
UK vs US Usage Differences
Interestingly, the grammatical rule does not change between British English and American English. However, the level of formality does differ slightly.
British English
British English tends to preserve traditional grammar rules in formal writing.
Examples:
- To whom it may concern
- The applicant whom we selected
- The customer with whom I spoke
These structures remain fairly common in business letters and official documents.
American English
American English often favours simpler and more conversational wording.
Examples:
Formal:
- Whom did you contact?
Informal:
- Who did you contact?
Formal:
- The candidate whom we hired
Informal:
- The candidate who we hired
As a result, many Americans rarely use whom in everyday speech.
Which Version Should You Use?
Use whom when:
- Writing formal emails.
- Creating academic papers.
- Preparing business reports.
- Communicating professionally.
Use conversational who when:
- Talking with friends.
- Posting on social media.
- Writing casual messages.
Common Mistakes People Make
Many English speakers make similar mistakes with these words.
1: Using “whom” as the subject
Incorrect:
- Whom wants to go shopping?
Correct:
- Who wants to go shopping?
The person performs the action, so use who.
2: Using “who” as the object
Incorrect:
- Who did you meet?
Technically formal grammar prefers:
- Whom did you meet?
However, the informal version is very common.
3: Forgetting prepositions
Incorrect:
- To who did you send the parcel?
Correct:
- To whom did you send the parcel?
4: Overusing “whom”
Some learners try to sound sophisticated by using whom everywhere.
Incorrect:
- Whom is responsible for this project?
Correct:
- Who is responsible for this project?
5: Ignoring sentence structure
Complex sentences can hide the correct answer.
Example:
- The employee who arrived late apologised.
- The employee whom the manager criticised apologised.
The first employee performs the action.
The second employee receives the action.
Correct Usage in Sentences
Here are practical examples from daily life.
Examples with Who
- Who opened the window?
- Who made this cake?
- Who called during lunch?
- Who sent these flowers?
- Who discovered the mistake?
- Who wants another cup of coffee?
- Who arranged the meeting?
- Who borrowed my notebook?
- Who owns this bicycle?
- Who lives here?
Examples with Whom
- Whom did you invite?
- Whom did they choose?
- Whom are you waiting for?
- Whom should we thank?
- Whom does this belong to?
- Whom did the police question?
- Whom were they discussing?
- Whom should I contact?
- Whom did the company promote?
- Whom did you recommend?
Formal and Informal Usage
The choice often depends on the level of formality.
Formal
- Whom did the board appoint?
- The student whom we selected accepted the scholarship.
- To whom should the complaint be addressed?
Informal
- Who did the board appoint?
- The student who we selected accepted the scholarship.
- Who should I send this to?
Both styles are acceptable depending on context.
Who or Whom in Relative Clauses
Relative clauses create additional confusion.
Subject Relative Clause
- The woman who called yesterday is my aunt.
- The man who fixed the car was helpful.
The person performs the action.
Object Relative Clause
- The woman whom I called yesterday is my aunt.
- The man whom we hired starts Monday.
The person receives the action.
In modern English, many speakers omit whom entirely.
Example:
- The woman I called yesterday is my aunt.
This version sounds natural in both UK and US English.
Who or Whom After Prepositions
This area often appears in exams and formal writing.
Examples:
- To whom are you speaking?
- For whom is this message intended?
- With whom did you travel?
- About whom are they arguing?
Modern spoken English usually moves the preposition.
Examples:
- Who are you speaking to?
- Who is this message for?
- Who did you travel with?
- Who are they arguing about?
Both versions are correct.
Tips to Remember the Correct Usage
Remember He Equals Who
If you can answer with he, use who.
Example:
- Who arrived first?
- He arrived first.
Remember Him Equals Whom
If the answer uses him, use whom.
Example:
- Whom did you invite?
- I invited him.
Look for Prepositions
Words like:
- to
- with
- by
- for
- from
often indicate whom.
Use Simpler Sentences
Break long sentences into smaller pieces to identify the subject and object.
Consider Formality
Formal writing generally prefers whom.
Casual conversation usually accepts who.
Examples from British English
- Whom did the council appoint?
- Who left the kettle on?
- To whom should the letter be addressed?
- Who organised the charity event?
- The employee whom the company promoted moved to Manchester.
Examples from American English
- Who ordered the burgers?
- Whom did the manager call?
- Who booked the hotel room?
- The person whom we hired starts tomorrow.
- Who are you talking to?
Why Learning This Rule Matters
Understanding grammar creates clearer communication.
Good grammar can help with:
- university applications
- job interviews
- professional emails
- academic writing
- business communication
In addition, correct usage builds confidence and improves credibility.
Although casual conversation often ignores these rules, knowing them allows you to choose the right level of formality for each situation.
Frequently Asked Questions
Is it always wrong to use “who” instead of “whom”?
No. In modern informal English, especially in the US, using who instead of whom is very common and widely accepted.
Is “whom” disappearing from English?
Not completely. It remains common in formal writing, legal documents, academic work, and business communication.
Do British and American English use different rules?
No. Both varieties follow the same grammatical rule. However, Americans tend to use whom less frequently in conversation.
Is “Who did you see?” incorrect?
Technically, formal grammar prefers Whom did you see? However, the version with who is extremely common in spoken English.
Why does “To whom it may concern” use “whom”?
Because the person receiving the concern is the object of the preposition to.
Can I avoid using “whom” completely?
In casual conversation, yes. In formal writing, however, using whom correctly can make your writing sound more professional.
What is the easiest way to remember the rule?
Use the he/him test:
- He = Who
- Him = Whom
This simple trick solves most cases.
Conclusion
The difference between who and whom may seem confusing at first, but the rule is actually straightforward. Who acts as the subject and performs the action, while whom acts as the object and receives the action.
The helpful he/him test provides an easy shortcut that works in most situations. If you can replace the word with he, use who. If you can replace it with him, use whom.
Although modern spoken English often favours who, especially in the United States, whom still has an important place in formal writing and professional communication. British English tends to preserve it slightly more often, but the grammar rule remains identical on both sides of the Atlantic.
By mastering this small but important distinction, you can write more clearly, sound more professional, and communicate with greater confidence. The next time you hesitate between who and whom, simply apply the rule and choose with confidence.
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James Anderson is a passionate language writer who loves making English words, phrases, slang, and text abbreviations easy to understand. He enjoys creating simple, accurate, and reader-friendly content that helps people learn with confidence. Through clear explanations and real-life examples, James aims to make language learning practical, engaging, and enjoyable for everyone.
