Who to Contact or Whom to Contact: Meaning & Usage 2026

This guide explains the difference between who to contact and whom to contact, the grammar rule behind it, and exactly when to use each form.

What Does “Whom to Contact” Mean?

“Whom to contact” is the grammatically precise, formal version of the phrase. It uses whom — the object pronoun — because the person being referred to is the receiver of the action contact.

In grammar terms: you contact him, her, or them — not he, she, or they. Since him/her/them are object pronouns, whom is the correct formal choice.

Example: “Please advise whom to contact regarding this invoice.”

Common uses:

• Formal business correspondence
• Academic and professional writing
• Legal and official documents
• Any context requiring strict grammatical precision

The Him/Her Test

The fastest way to check whether whom is correct — substitute him or her into the answer:

“Who/whom should I contact?” → Answer: “Contact her.” ✅ → Her is an object pronoun → use whom

If the answer uses him, her, or them → whom is correct. If the answer uses he, she, or they → who is correct.

What Does “Who to Contact” Mean?

“Who to contact” is the informal, conversational version of the same phrase. It uses who — the subject pronoun — in place of whom.

While technically less precise by strict grammar standards, “who to contact” is so widely used and accepted in everyday speech and informal writing that it is rarely considered an error outside of formal contexts.

Example: “Do you know who to contact about this issue?”

Common uses:

• Casual conversation and informal speech
• Everyday emails and workplace chat
• Social media and digital communication
• Any context where natural, relaxed language is preferred

“Who to Contact” in Modern Usage

Language evolves. “Whom” is gradually declining in everyday spoken English — even among educated speakers. Most style guides acknowledge that “who to contact” is fully acceptable in informal settings and that insisting on “whom” in casual conversation can sound unnecessarily stiff.

The Key Difference Between Who or Whom

Subject Pronoun or Object Pronoun

This is the grammar rule that determines everything:

• Who = subject pronoun — like he, she, they
• Whom = object pronoun — like him, her, them

The person being contacted is receiving the action — making them the object. That is why whom is technically correct in formal writing.

The Preposition Rule

When whom follows a preposition — to, for, with, by — it is almost always required in formal writing. This is one area where even casual writers tend to use whom.

• “To whom it may concern” ✅ (standard formal opening)
• “For whom the bell tolls” ✅ (literary)
• “With whom did she speak?” ✅ (formal)
• “To who it may concern” ❌ (non-standard)

Preposition + whom = standard formal English — even in contexts where who is otherwise acceptable.

When to Use Who to Contact or Whom to Contact

Use “Whom to Contact” When:

• Writing formal business letters or official correspondence
• Producing legal, academic, or governmental documents
• Following strict grammar style guides like Chicago or AP
• The phrase follows a preposition (to whom, for whom)
• You want to project precision and professionalism

Examples:

• “Please specify whom to contact in the event of an emergency.”
• “The form asks whom to notify in case of absence.”

Use “Who to Contact” When:

• Communicating in casual, everyday conversation
• Writing informal emails, chats, or workplace messages
• Speaking to someone in a relaxed, natural setting
• Formal precision is not required or expected

Examples:

• “I’m not sure who to contact about this.”
• “Can you tell me who to contact for a refund?”

Memory trick:

• Replace with him or he and see which fits:
  • “Contact him“ → use whom
  • “He called” → use who
• The m in whom matches the m in him and them — all object pronouns

FAQs — Who to Contact or Whom to Contact

How do I use whom correctly?

Use whom when the person is the object of a verb or preposition — when you could replace it with him, her, or them. Example: “Whom did you ask?” = “You asked her.” The him/her test works every time.

Does anyone still use whom?

Yes — whom is still widely used in formal writing, legal documents, and professional correspondence. In casual speech it is declining, but phrases like “to whom it may concern” and “for whom” remain standard in formal contexts.

Is it who or whom should I say is calling?

“Who should I say is calling?” is correct here. The person is the subject of is calling — performing the action — so who is the right choice. Apply the he/she test: “She is calling” → subject pronoun → who.

What are common mistakes with whom?

The most common mistakes include: using whom when who is needed (“Whom is calling?” ❌), using who after prepositions in formal writing (“To who it may concern” ❌), and over-correcting by inserting whom everywhere regardless of grammar role.

Conclusion

The grammar rule is clear — “whom to contact” is the formally correct choice because the person being contacted is the object of the verb. “Who to contact” is the natural, widely accepted choice in everyday conversation and informal writing.

In professional and formal contexts — especially after prepositions — whom signals precision and care. In casual speech and everyday writing — who sounds natural and is never a serious error. Know the rule, apply it where it matters, and you will always make the right choice.