Whom in Questions
Questions are where the who/whom distinction gets tested hardest, because English question word order pulls the object pronoun to the front of the sentence, far away from the verb or preposition it's actually the object of — which is exactly the structure that makes 'whom' feel unnatural even to writers who know the rule. Untangling a question's real subject and object is the whole trick here.
The basic pattern: front-moved objects
In a normal statement, the object sits after its verb: You called him. In a question, that object moves to the front: Whom did you call? The pronoun's grammatical job hasn't changed — it's still the object of 'call' — only its position in the sentence has moved, which is precisely why the substitution test requires mentally restoring the statement word order first: 'You called ___' clearly wants 'him,' so the question wants 'whom.'
Questions with a preposition at the end
When a question's preposition stays at the end rather than moving to the front with the pronoun, the same object logic still applies even though the preposition is no longer sitting right next to the pronoun: Who(m) did you give the book to? In this looser, more conversational structure, 'who' has become overwhelmingly standard even among careful speakers, while the stricter formal version keeps the preposition and pronoun together at the front: To whom did you give the book?
Subject questions never take whom
When the question word itself is the one performing the action, who is always correct, regardless of how the rest of the sentence is arranged: Who called the meeting? Who wrote this report? Testing with a restored statement confirms it: 'He called the meeting,' not 'Him called the meeting' — so whom would be a clear error in either of these.
Embedded questions inside a larger sentence
When a question is embedded inside a larger statement, the same rules apply to the embedded clause on its own terms: She wondered who had sent the flowers (subject of 'had sent' — he had sent them) versus She wondered whom the flowers were from (object of the implied 'from' — the flowers were from him). Isolating the embedded question and running the test on it alone, separately from the surrounding sentence, is the reliable method here too.
Why 'whom' in questions sounds especially stiff
Because question word order fronts the pronoun and often separates it from its verb by several words, 'whom' in a question reads as more consciously formal than 'whom' in a straightforward relative clause, where the pronoun sits closer to its grammatical role. This is part of why 'Whom did you invite?' can sound almost theatrically correct in casual conversation even to speakers who'd happily use 'whom' after a preposition without a second thought (to whom, for whom).
How dictionaries and usage guides now treat it
Most major current usage guides and dictionaries note that 'who' has become fully standard in questions in all but the most formal registers, and some explicitly recommend 'who' as the more natural choice in speech and informal writing, reserving 'whom' for prepositional constructions and for writing that specifically wants a formal tone. This represents one of the more clearly documented shifts in how a prescriptive rule has been revised over time in response to overwhelming, sustained usage in the opposite direction.
A worked example with a tricky insertion
Consider: Whom do you believe they hired? The temptation is to see 'do you believe' and assume it needs an object pronoun to follow, but restoring the underlying statement clarifies the real structure: 'they hired ___' clearly wants an object ('they hired him'), so 'whom' is in fact correct here — unlike the earlier 'who do you think will win' example, where the inserted clause doesn't change which slot the pronoun fills. The difference between these two patterns is exactly why each question needs its own quick test rather than a blanket assumption.
Practical advice for writers
In speech and informal writing, defaulting to 'who' in questions is now unlikely to draw criticism from anyone. In formal written contexts — cover letters, academic papers, official documents — it's worth running the quick substitution test on any question using who or whom, since this is one of the more visible grammar points that careful readers still notice, even as it continues to fade from everyday spoken usage.
How children acquire this pattern
Language-acquisition research on English-speaking children shows that question-word fronting (moving the object pronoun to the sentence's start) is mastered early and reliably, while the specific choice between who and whom in that fronted position is acquired much later, if at all, and largely through explicit teaching rather than natural exposure — because casual adult speech around children overwhelmingly models 'who' in questions regardless of grammatical role, children have little natural input from which to infer the whom rule on their own, unlike most of the rest of English grammar, which they absorb without formal instruction.
Whom in indirect and rhetorical questions
Indirect questions embedded inside a larger statement (I don't know who/whom to call) follow the identical rule as direct questions, just without a question mark: the pronoun's role inside its own embedded clause decides the choice, independent of the sentence surrounding it. Rhetorical questions — ones not actually seeking an answer — follow the same logic too: Whom did they think they were fooling? still needs the object form, since 'they were fooling' takes an object regardless of whether a genuine answer is expected.
Whom versus who after 'than' and 'as' in questions
A less common but genuinely tricky case arises in comparative questions: Who(m) did they trust more, John or Mary? Because the comparison structure can obscure which verb the pronoun belongs to, it helps to expand the comparison mentally: 'did they trust him more, or did they trust her more' — both slots are objects, confirming 'whom' as the formally correct choice, even though 'who' remains overwhelmingly what most speakers would actually say out loud.
Summary heuristic for questions specifically
For questions, the fastest reliable heuristic is: restate the question as a statement using the pronoun in its natural resting place, then check whether he/she/they or him/her/them fits. If the restated statement needs a subject pronoun, use who; if it needs an object pronoun, use whom. This single mental step resolves the great majority of who/whom confusion in questions, including the trickier cases where an inserted clause like 'do you think' or 'do you believe' tempts a writer to misjudge which slot the pronoun is actually filling.
Whom in journalistic headlines
Newspaper headlines almost always favor 'who' over 'whom' even in strictly grammatical object positions, largely for brevity and because headline style intentionally favors the more casual, compressed register readers expect from a headline rather than the more formal register expected of body copy. This creates a visible split within a single publication: a headline might read 'Who Should Be Blamed?' while the article's body text, held to fuller formal standards, might use 'whom' in the identical grammatical position, illustrating again how strongly register drives this particular choice.
A final practical note for writers
Because getting whom wrong in either direction — using it where who belongs, or the reverse — draws attention from careful readers without actually causing confusion about meaning, many professional editors treat this as a lower-priority correction compared to genuine clarity or factual errors elsewhere in a piece. Writing for a general audience, defaulting to 'who' in almost all questions is a safe, modern choice; reserving 'whom' for the small set of clearly formal, prepositional contexts where it still feels natural is usually the better balance than trying to apply it everywhere the traditional rule would technically require.
Frequently asked questions
Is 'Whom shall I say is calling?' correct?
No — this is a classic hypercorrection. 'Is calling' needs a subject, so the correct form is 'Who shall I say is calling?' The inserted phrase 'shall I say' doesn't change the fact that the pronoun is the subject of 'is calling.'
Do British and American English differ on whom in questions?
Not fundamentally — both traditions describe the same underlying rule. British formal writing may retain 'whom' slightly more consistently in certain institutional or legal contexts, but the decline of whom in everyday speech has occurred in both varieties.
Is it wrong to always just use 'who' in questions?
In casual and most professional writing, no — 'who' is now standard even where a strict grammarian would technically call for 'whom.' Only in the most formal registers, or directly after a preposition, does using 'who' instead of 'whom' risk reading as a genuine error rather than an accepted informal choice.
Should I use whom in a job interview or formal speech?
It's optional even in fairly formal spoken contexts — most listeners no longer expect strict whom usage in speech. Written formal communication (cover letters, official reports) is where it's still more consistently expected. Reading your draft aloud is a quick way to judge whether the register calls for the stricter form.