Who vs Whom: When to Use Each (2026)
Quick answer: use who for the subject of a sentence — the person doing the action ("who called?"). Use whom for the object — the person the action is done to ("whom did you call?"). The quick test: replace the word with he/she (subject) or him/her (object). If him fits, you want whom; if he fits, you want who.
Key takeaways
- Who = subject. It performs the verb: "Who edited this chapter?"
- Whom = object. It receives the action: "Whom did the editor contact?"
- The him/her test: rewrite the clause with he/him. Him → whom. He → who.
- After a preposition, use whom: "to whom it may concern", "with whom you worked".
- Everyday speech usually drops whom — in fiction dialogue, "Who did you call?" is correct-sounding. Keep whom for formal prose, reports and cover letters.
The rule, then the reason
Who and whom are the same word wearing two cases, exactly like he/him and she/her. English marks the difference only in this one pair of pronouns; every other relative pronoun (that, which) uses one form for both.
| Sentence | Word | Why |
|---|---|---|
| Who wrote the foreword? | who (subject) | the person does the writing |
| Whom did you ask to write it? | whom (object) | the person receives the asking |
| The author who signed with us lives nearby. | who (subject) | who performs signed |
| The author whom we signed lives nearby. | whom (object) | we perform signed; whom receives it |
The him/her test, step by step
- Find the clause the word belongs to.
- Swap in he or him (or she/her).
-
If him/her sounds right, the word is an object → whom. If he/she sounds right, it is a subject → who.
-
"…the agent who/whom I emailed." → "I emailed him." → him → whom.
- "…the agent who/whom emailed me." → "He emailed me." → he → who.
Where writers over-correct
The most common error is not using whom too little — it is using it too much, to sound formal:
- ❌ "Whom is calling?" → He is calling → Who is calling?
- ❌ "Whom wrote this?" → He wrote this → Who wrote this?
- ✅ "Whom did you hire?" → You hired him → correct.
If in doubt in a sentence that already sounds natural with who, leave it. A wrong whom reads worse than a plain who.
Quick self-check before you publish
- Ask: is this person doing the verb, or receiving it?
- Doing → who. Receiving → whom.
- Still unsure? Rewrite the sentence so you never need the choice: "Which agent did you email?" reads clean and is always correct.
Frequently asked questions
Is "whom" still used in 2026?
Yes, in formal writing — reports, cover letters, academic prose and third-person narration. In dialogue and casual blog copy, who is normal and no longer reads as an error.
Can I always use "who" instead of "whom"?
In most speech, yes. In formal prose a missing whom after a preposition ("to who it may concern") is noticed. Fix the prepositional cases first; they are the ones readers spot.
What about "whoever" vs "whomever"?
Same rule, same test. "Give it to whoever wants it" (he wants it → subject) but "Give it to whomever you choose" (you choose him → object).
Does spell-check catch this?
No — both are real words, so a spell-checker passes either one. Only a read-back or an editor catches the wrong case.
Where this goes next
Whom-that-should-be-who and who-that-should-be-whom are the kind of thing a copy edit catches across a whole manuscript in one pass — faster and more consistent than fixing them one by one. See our editing and proofreading service.
Related guides
Keep going: how to write a book, the types of book editing, book editing services and proofreading services. For a dictionary definition, see whom (Cambridge Dictionary).
Disclosure: Harmony Publishing is a self-publishing company and links to its own services where they match a step. The language guidance here is practical, not a rule for every style guide.
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