Who to contact or Whom to contact: Which Is Correct?

Updated 2026-10-03 · Which One Is Correct editorial team

Quick answer: Deciding whether to write who to contact or whom to contact often trips up English speakers. The short answer is that whom is technically correct because it serves as the object of the verb. However, who is widely accepted in modern informal writing and speech. Understanding the grammatical role helps you choose the best option for your specific context.

The Short Answer

Whom to contact is the grammatically correct choice in formal English, while who to contact is acceptable in casual usage. Traditional grammar rules dictate that whom should be used when the pronoun is the object of a verb or preposition.

Confusion arises because who and whom sound similar in modern speech, leading many writers to default to who for simplicity. In everyday conversation, the distinction has blurred, causing even native speakers to hesitate when writing professional emails or formal documents.

Side-by-Side Comparison

Form	Status	Use it when
who to contact	Informal	Writing casually or speaking to friends
whom to contact	Formal	Writing business emails or academic papers
Who	Subject	The pronoun performs the action in the sentence
Whom	Object	The pronoun receives the action or follows a preposition

Correct Example Sentences

Please tell me whom to contact if the system crashes tonight.
I need to know who to contact regarding the new office policy.
To whom should I address this urgent invoice immediately?
Let us know who to contact for scheduling your upcoming appointment.
Ask your manager whom to contact for emergency maintenance requests.
Can you clarify who to contact about the missing delivery package?
We must identify whom to contact before signing the final contract.
Find out who to contact for password resets and account issues.
Please list whom to contact in case of a power outage.
I am unsure who to contact about the billing discrepancy on my statement.

Common Mistakes and Fixes

Who should I contact for help with this?: Whom should I contact for help with this?
Not knowing who to contact delayed the process.: Not knowing whom to contact delayed the process.
That is the person who I will call.: That is the person whom I will call.
Who are you inviting to the gala event?: Whom are you inviting to the gala event?
Who did you speak to about the budget?: Whom did you speak to about the budget?
It is unclear who to assign this task to.: It is unclear whom to assign this task to.

A Quick Test You Can Use

Replace the pronoun with he or him to determine the correct form. If he fits naturally, use who; if him fits, use whom. For example, if you can say I will contact him, then whom is the correct choice in the phrase whom to contact.

Related Word Pairs

Then vs Than: Use then for time sequences and than for comparisons.
Its vs It's: Use its for possession and it's as a contraction for it is.
Their vs They're: Use their for possession and they're as a contraction for they are.
Affect vs Effect: Use affect as a verb and effect as a noun.
Lie vs Lay: Use lie for resting down and lay for placing something down.

More Example Sentences

Determine who to contact for access to the secure server.
The manual states whom to contact during a data breach.
Please specify who to contact when the printer jams.
It is vital to know whom to contact for legal advice.
Who to contact depends on which department handles the issue.
Consult the directory to see whom to contact for IT support.
Decide who to contact before sending the press release.
The form asks whom to contact in case of an emergency.
Identify who to contact for refunds and exchanges.
We need to establish whom to contact for vendor negotiations.

Quick Practice

to contact about the missing keys?

Who

The guide says to contact for repairs.

whom

to contact regarding the noise complaint?

Who

Please tell me to contact for billing errors.

whom

to contact if the lights go out?

Who

The instructions list to contact for feedback.

whom

Frequently Asked Questions

Can I use who in formal business writing?

While whom is preferred for strict grammar, using who in informal business contexts is increasingly common. If you want to appear strictly professional, stick with whom when it is the object.

Why do some people ignore the rule?

The distinction between who and whom is fading in spoken English. Many speakers use who for both subject and object roles, leading to widespread acceptance of who in casual digital communication.

Is whom to contact rude or outdated?

No, using whom is not rude. It simply signals attention to detail and formal grammar. In highly formal documents, using whom demonstrates precision and respect for standard English conventions.

What if I am still unsure which to use?

Try the he or him substitution test. If you can replace the word with him, use whom. If he works better, choose who. This simple trick resolves most ambiguity instantly.