Have you ever written an email and stopped at a sentence like, “I’m not sure who to contact” or “I’m not sure whom to contact”? 🤔 If so, you are not alone. Many English speakers are unsure which form to use. This guide explains the difference between who to contact vs whom to contact so you can choose the right phrase with confidence.
The words who and whom have confused English learners and native speakers for years. The confusion becomes even more common when these words appear before an infinitive, as in who to contact and whom to contact. Both expressions are used in English, but they have different grammatical roles and different levels of formality.
In everyday American English, who to contact is the more natural and common choice. It is widely used in conversation, emails, messages, and other forms of everyday communication. Whom to contact is also grammatically correct in traditional formal English, especially when whom is being used as the object of the verb. However, it can sound more formal, old-fashioned, or stiff in casual situations.
So, should you write who to contact or whom to contact? 🤔 The best choice depends on the sentence, the level of formality, and the style of English you are using. In this guide, we will explain the difference in simple terms, show you clear examples, and help you understand when to use who to contact and when whom to contact is appropriate. Giving vs Given | Day Off vs Off Day | Aging vs Ageing
Quick Answer: Who to Contact vs Whom to Contact
Who to contact is the most natural choice in modern everyday and professional American English.
Whom to contact is traditionally correct when whom functions as the object of contact, but it sounds more formal. For most situations, especially normal emails, conversations, and digital communication, who to contact is the better choice.
Example:
- I don’t know who to contact about the problem. ✅
- I don’t know whom to contact about the problem. ✅ More formal
Both sentences are grammatical, but who to contact is much more common in ordinary modern English.
Understanding the Basics of Who to Contact vs Whom to Contact
To understand the difference, you first need to understand the basic difference between who and whom.
What Does “Who” Mean?
Who is a pronoun normally used for the subject of a verb.
For example:
- Who called you?
- Who sent this email?
- Who is responsible?
- Who wants to join us?
In these sentences, who performs the action or acts as the subject.
You can often test who by replacing it with he, she, or they.
For example:
Who called you?
You could answer:
He called me.
Because he is a subject pronoun, who works naturally in the question.
What Does “Whom” Mean?
Whom is traditionally the objective form of who.
It is used when the person is the object of a verb or preposition.
For example:
- Whom did you call?
- Whom did she invite?
- To whom should I speak?
- With whom did you travel?
You can often test whom by replacing it with him, her, or them.
For example:
Whom did you call?
The answer could be:
I called him.
Because him is an object pronoun, traditional grammar recommends whom.
The Basic Comparison
| Form | Type | Meaning | Example | Correct/Incorrect |
|---|---|---|---|---|
| Who | Subject pronoun | Refers to the person doing an action | Who called the office? | ✅ Correct |
| Whom | Object pronoun | Refers to the person receiving an action | Whom did you call? | ✅ Traditional/formal |
| Who to contact | Modern/common construction | The person you should contact | I know who to contact. | ✅ Correct |
| Whom to contact | Formal/traditional construction | The person whom you should contact | I know whom to contact. | ✅ Correct, formal |
The important point is that who to contact is not simply a grammar mistake. Modern English commonly uses who in places where traditional grammar would expect whom.
What Is the Difference Between Who to Contact and Whom to Contact?
The main difference is grammatical case and level of formality.
Consider this sentence:
I don’t know who to contact.
The hidden meaning is:
I don’t know who I should contact.
In the second sentence, who is the person being contacted. Traditional grammar might therefore use whom:
I don’t know whom I should contact.
However, modern English frequently uses who in this kind of construction.
That is why:
I don’t know who to contact.
sounds completely natural to most American English speakers.
The version:
I don’t know whom to contact.
is also grammatical, but it has a more formal tone.
A Simple Rule
If you are writing normal American English and you are unsure, use:
who to contact
It is clear, natural, and widely accepted.
Use:
whom to contact
when you deliberately want a formal or traditional grammatical style.
When Should You Use “Who to Contact”?
1. Everyday Conversation
In normal conversation, who to contact is usually the best choice.
Examples:
- Do you know who to contact?
- I’m not sure who to contact.
- Can you tell me who to contact?
- She asked me who to contact.
- We need to find out who to contact.
These sentences sound natural and comfortable.
Saying:
Do you know whom to contact?
is grammatically defensible, but many speakers would consider it unusually formal.
2. Professional Emails
Who to contact also works very well in professional writing.
For example:
Could you please let me know who to contact about the invoice?
This sounds polite and professional without sounding unnecessarily formal.
Another example:
Please let me know who to contact if I have additional questions.
This is clear and natural.
You do not need to use whom just because you are writing a business email.
3. Websites and Instructions
You may also see who to contact in help pages, company instructions, and customer-service information.
Examples:
- Learn who to contact for technical support.
- Here is who to contact about your application.
- The page explains who to contact if you need assistance.
The phrase is especially common in modern digital writing.
When Should You Use “Whom to Contact”?
1. Very Formal Writing
Whom to contact can be appropriate when the writing has a formal or traditional tone.
For example:
The committee will determine whom to contact regarding the investigation.
This sounds formal and polished.
2. Legal or Official Language
Some official documents may retain whom because traditional objective-case grammar is preferred in formal writing.
For example:
The applicant must identify whom to contact in case of an emergency.
The sentence is grammatical and formal.
3. When “To Whom” Is Used
A related structure is:
To whom should I send this letter?
Here, whom follows the preposition to.
Traditional grammar strongly favors:
To whom should I send the documents?
over:
To who should I send the documents?
However, everyday English often moves the preposition to the end:
Who should I send the documents to?
This is extremely common in American English.
The Easy “He/Him” Test
One of the most useful ways to understand who and whom is the he/him test.
Replace the unknown person with he or him.
- If he works, use who.
- If him works, traditional grammar uses whom.
Example 1
Who called?
Try:
He called.
That works.
So:
Who called? ✅
Example 2
Whom did you call?
Try:
I called him.
That works.
So:
Whom did you call? ✅
Example 3
I don’t know who to contact.
Expand the sentence:
I don’t know who I should contact.
Now try the pronoun:
I should contact him.
Traditional grammar therefore identifies the person as an object, which explains why whom can be used:
I don’t know whom I should contact.
But modern English commonly shortens this to:
I don’t know who to contact.
This is one reason the phrase can feel confusing.
Why “Who to Contact” Is So Common
English has changed over time.
Although traditional grammar distinguishes sharply between who and whom, everyday English has increasingly favored who.
The reason is simple: whom can sound formal, old-fashioned, or overly careful in many situations.
Compare these sentences:
I need to know who to contact.
and:
I need to know whom to contact.
Both can be grammatical. The first sounds normal and conversational. The second sounds more formal.
Modern English often prefers clarity and natural speech over strict preservation of older case distinctions.
The Chicago Manual of Style notes that whom can be grammatically appropriate while also acknowledging that it can sound noticeably formal or self-conscious in some contexts.
Sentence Breakdown: “Who to Contact”
Consider:
I don’t know who to contact about the problem.
Here is the structure:
- I = subject
- don’t know = main verb phrase
- who to contact = information that is unknown
- contact = infinitive verb
- who = person being identified
The full idea can be expressed as:
I don’t know who I should contact about the problem.
In everyday modern English, who to contact is a natural shortened construction.
More Examples
Can you tell me who to contact?
Meaning:
Can you tell me which person I should contact?
Another example:
We need to decide who to contact first.
Meaning:
We need to decide which person we should contact first.
Another:
She knows who to contact for technical support.
Meaning:
She knows which person she should contact for technical support.
Sentence Breakdown: “Whom to Contact”
Now consider:
I don’t know whom to contact.
The meaning is essentially the same:
I don’t know which person I should contact.
Traditional grammar treats whom as the object of contact.
This makes sense because you contact someone, not someone who performs the contacting.
For example:
I contacted him.
Not:
I contacted he.
Therefore, traditional grammar says:
I don’t know whom to contact.
However, modern usage accepts who to contact very widely.
Test Tip: Use the Expanded Sentence
Here is a useful test:
Step 1: Expand the phrase
Turn:
who to contact
into:
who I should contact
Step 2: Replace the pronoun
Try:
I should contact him.
Because him is an object, traditional grammar would support whom.
So:
whom to contact
is traditionally correct.
But remember: this test explains the traditional grammatical case. It does not mean that who to contact is wrong in modern American English.
That distinction is important.
Who to Contact vs Whom to Contact in Real Life
Imagine that you have received a message from your internet provider.
You need help, but you do not know which employee handles technical issues.
You ask a coworker:
Do you know who to contact about this?
Your coworker might say:
Yes. Contact Sarah in technical support.
This is the most natural everyday usage.
You could also say:
Do you know whom to contact about this?
This is grammatical, but it sounds more formal.
If you are chatting with a friend, who to contact is clearly the more natural option.
If you are writing a highly formal report, whom to contact may fit the tone better.
Case Study: A Workplace Email
Imagine an employee needs information about a company benefit.
The employee writes:
Hi James,
I have a question about the health benefits for new employees. Could you please let me know who to contact about this?
Thanks!
This is professional, polite, and completely natural.
There is no need to replace who with whom.
A more formal version could be:
Could you please let me know whom I should contact regarding this matter?
This version is also grammatical, but it is more formal and slightly heavier.
What Does This Show?
The choice is often not about right versus wrong.
It is about:
- grammatical tradition
- modern usage
- tone
- audience
- context
- readability
For most modern American communication, who to contact is the easier and more natural choice.
Grammar Rules Behind Who and Whom
Traditional English grammar distinguishes between subject case and object case.
The forms are:
| Subject | Object |
|---|---|
| I | me |
| he | him |
| she | her |
| we | us |
| they | them |
| who | whom |
This explains the traditional distinction.
Who = Subject
Who called you?
Who performs the action.
Whom = Object
Whom did you call?
The person receives the action of call.
But What About “Who to Contact”?
This is where real-world English becomes more flexible.
Traditional grammar can analyze the phrase as:
whom to contact
because the person is the object of contact.
But modern English frequently uses who instead.
This is not unusual. English has many areas where actual usage is more flexible than older prescriptive rules.
The Chicago Manual of Style’s current online material includes a dedicated section on “Who versus whom,” reflecting the continuing importance of the distinction while recognizing the complexities of modern usage.
Merriam-Webster also treats who and whom as different case forms while documenting how actual English usage affects the choice.
Is “Whom to Contact” More Correct?
Not necessarily.
A better way to think about it is:
Whom to contact = traditional and formal.
Who to contact = modern, natural, and widely accepted.
Calling who to contact simply “incorrect” would give learners an incomplete picture of contemporary American English.
For formal grammar exercises that specifically test objective pronouns, whom may be the expected answer.
For ordinary communication, who is usually the better choice.
Common Mistakes With Who to Contact vs Whom to Contact
Why do people make mistakes with these words? Several reasons are common.
1. Fast Typing
When people type quickly, they usually write the form that sounds natural.
That often leads to:
who to contact
rather than:
whom to contact
This is not necessarily a problem.
2. Autocorrect
Phones and browsers can sometimes influence word choice.
A writer may type one form and accept an automatic suggestion without checking the grammar.
3. Lack of Knowledge
Many English learners are taught:
who = subject
whom = object
That rule is useful, but it does not explain every modern usage pattern.
4. Overcorrecting
Some writers learn the rule and then start using whom everywhere.
For example:
Whom is coming to the meeting?
This is incorrect because whom cannot replace the subject who in that sentence.
The correct sentence is:
Who is coming to the meeting?
5. Trying to Sound More Professional
Some writers believe whom automatically makes writing more professional.
It does not.
A clear sentence is usually more effective than an unnecessarily formal one.
Similar Grammar Confusions
The confusion between who and whom is part of a larger group of commonly confused English forms.
| Confusing Forms | Correct Use | Example |
|---|---|---|
| who / whom | Subject vs. object | Who called? / Whom did you call? |
| your / you’re | Possessive / you are | Your phone / You’re ready |
| its / it’s | Possessive / it is | Its color / It’s blue |
| their / they’re | Possessive / they are | Their car / They’re here |
| then / than | Time / comparison | Then we left / Taller than me |
| affect / effect | Usually verb / usually noun | It affected me / The effect was clear |
| who’s / whose | Who is / possession | Who’s there? / Whose bag is this? |
| there / their / they’re | Place / possession / they are | There it is / Their home / They’re ready |
The best way to avoid these mistakes is to understand what each word does rather than memorize a list of spellings.
Who to Contact vs Whom to Contact in Different Contexts
Everyday Conversation
Use who to contact.
Examples:
Do you know who to contact?
I don’t know who to contact about my account.
Can you tell me who to contact?
These sound natural.
Professional Writing
Both forms can work, but who to contact is often the best choice because it is direct and easy to read.
Example:
Please let me know who to contact if I have any questions.
For a more formal document:
Please identify whom to contact regarding the matter.
Both can be appropriate depending on the tone.
Academic Writing
Academic writing often favors careful grammar and formal style.
You may encounter:
The researcher must determine whom to contact for additional information.
However, who to contact is not automatically wrong in academic writing. The overall style and publication guidelines matter.
Legal or Official Writing
Formal documents may prefer whom.
Example:
The applicant must specify whom to contact in an emergency.
Here, the traditional objective form fits the formal tone.
Creative Writing
Creative writers have more freedom.
A character might naturally say:
I don’t know who to contact.
A narrator with a highly formal voice might write:
She wondered whom to contact.
The choice can help establish the voice of the writing.
Social Media and Texting
Use who to contact.
Examples:
Does anyone know who to contact?
Anyone know who to contact about this?
I have no idea who to contact 😂
Social media favors natural, conversational language, so whom can feel unnecessarily formal.
Why the Difference Matters
The choice between who and whom can affect the tone of your writing.
1. Clarity
Who to contact is immediately understandable to most readers.
2. Professionalism
Professional writing does not require complicated language.
A simple sentence can sound more professional than an overly formal one.
3. Accuracy
Understanding traditional grammar helps you recognize why whom appears in formal writing.
4. Digital Communication
People now write emails, messages, comments, forms, and workplace chats every day.
Natural language matters because readers usually prefer clear communication.
As a useful principle:
“Clarity is often more important than formality.”
The goal is not to make every sentence sound old-fashioned. The goal is to communicate your meaning accurately.
Special Exception: When “Whom” Is Strongly Preferred
There are situations where whom remains especially useful.
One important example is when it directly follows a preposition in formal writing:
To whom should I send the documents?
With whom did you speak?
For whom is this package?
In these sentences, whom clearly functions as the object of the preposition.
In everyday American English, speakers often move the preposition:
Who should I send the documents to?
Who did you speak with?
These versions are natural in conversation.
The formal versions are not wrong. They simply have a more traditional style.
Who to Contact vs Whom to Contact: A Practical Decision Guide
If you are unsure which version to use, ask yourself what kind of writing you are doing.
Choose “Who to Contact” When:
- You are speaking casually.
- You are texting.
- You are writing a normal email.
- You are posting on social media.
- You want natural American English.
- You want the sentence to sound friendly.
- You are writing for a general audience.
Choose “Whom to Contact” When:
- You are writing very formally.
- You are following traditional grammar rules.
- You are preparing a formal document.
- The context strongly favors an objective pronoun.
- You want a deliberately formal tone.
Quick Recap Checklist
| Question | If Yes → Use |
|---|---|
| Is this everyday conversation? | Who to contact |
| Is this a casual message? | Who to contact |
| Is this a normal professional email? | Who to contact |
| Do you want natural modern American English? | Who to contact |
| Is the writing highly formal? | Whom to contact |
| Are you following traditional objective-case grammar? | Whom to contact |
| Does the phrase follow a preposition, such as “to”? | Often whom in formal writing |
Practice Examples
1. I don’t know ___ to contact about my account.
Best everyday answer:
I don’t know who to contact about my account. ✅
Formal alternative:
I don’t know whom to contact about my account. ✅
2. Can you tell me ___ to contact?
Natural choice:
Can you tell me who to contact? ✅
3. The manager asked me to identify ___ to contact.
Formal/traditional choice:
The manager asked me to identify whom to contact. ✅
Frequently Asked Questions
Is “who to contact” grammatically correct?
Yes. Who to contact is grammatically acceptable and very common in modern American English. It is the natural choice for most everyday and professional situations.
Is “whom to contact” grammatically correct?
Yes. Whom to contact follows the traditional distinction between subject and object pronouns. It is especially suitable when a formal or traditional tone is desired.
Which is more common: “who to contact” or “whom to contact”?
Who to contact is generally more natural in modern American English, especially in conversation, emails, texting, and other everyday communication.
Should I use “whom” in a professional email?
You can, but you usually do not need to. Who to contact sounds professional and natural in most business emails. Use whom when the tone is especially formal or when traditional grammar is important.
Is “whom” always more formal than “who”?
In many contexts, yes. Whom is traditionally associated with formal or careful writing, while who is much more common in ordinary speech. However, the difference depends on the sentence.
How can I remember when to use who or whom?
Use the he/him test. If you could replace the word with he, use who. If you could replace it with him, traditional grammar calls for whom.
For example:
Who called?
→ He called.
But:
Whom did you call?
→ I called him.
Remember, though, that modern English often uses who where traditional grammar would use whom.
Conclusion
The difference between who to contact and whom to contact is mainly about grammatical tradition, modern usage, and tone. Traditional grammar treats whom as the objective form because the person being contacted is the object of the verb. That explains why whom to contact is grammatically valid.
However, modern American English commonly uses who to contact, and it sounds natural in everyday speech, emails, workplace communication, texting, and online writing. You should not assume that who to contact is incorrect simply because whom to contact follows the traditional case rule.
If you want a simple rule to remember, choose who to contact for most normal communication. Choose whom to contact when you intentionally want a formal or traditional tone.
In short, who to contact is the natural modern choice, while whom to contact is the formal traditional choice. Understanding both will help you write with confidence.
When in doubt, choose clarity first: know who to contact—and know why. ✨
Hi, I’m Tyler Brooks, an English language writer at Gramcora. I am passionate about helping learners strengthen their grammar and writing skills with practical examples and easy-to-understand explanations.
