Assist with or assist in—which phrase should you use? If you have ever hesitated before writing a sentence such as “She assisted with the project” or “She assisted in completing the project,” you are not alone.
Both constructions are grammatically correct, but they do not always work in exactly the same situations.
The confusion comes from the fact that assist can be followed by different prepositions, and the choice often depends on what comes next.
Assist with commonly introduces a task, activity, project, or thing that someone helps with. Assist in often introduces an activity or process, especially when it is followed by a noun or an -ing form.
The good news is that you do not need to memorize a complicated grammar rule. Once you understand the patterns, choosing between assist with and assist in becomes much easier.
This guide explains the difference, grammar patterns, pronunciation, formal and everyday usage, common mistakes, professional writing preferences, and more than 20 real-life examples.
Quick Answer
Both “assist with” and “assist in” are correct. The difference is mainly grammatical and contextual.
- Assist with + noun/activity: “I assisted with the presentation.”
- Assist in + noun/-ing activity: “I assisted in preparing the presentation.”
- Assist with is often more natural in everyday and general professional English.
- Assist in can sound more formal and is common when describing participation in a process or activity.
Simple rule: Use assist with when you mean “help with something,” and use assist in when you mean “help in doing or accomplishing something.”
Assist With or Assist In: Comparison Table
| Feature | Assist with | Assist in |
|---|---|---|
| Basic meaning | Help with something | Help in a process or activity |
| Part of speech | Verb + preposition | Verb + preposition |
| Pronunciation | assist /əˈsɪst/ + with /wɪð/ | assist /əˈsɪst/ + in /ɪn/ |
| Common pattern | assist with + noun | assist in + noun / gerund |
| Example | “He assisted with the project.” | “He assisted in completing the project.” |
| Tone | Neutral, natural | Often more formal |
| Everyday English | Very common | Less common |
| Business English | Very common | Common |
| Academic writing | Common | Common, especially for processes |
| Passive voice | “She was assisted with the application.” | “She was assisted in completing the application.” |
| Main focus | The thing being helped | The process or activity |
| Can precede -ing? | Yes: “assist with writing” | Yes: “assist in writing” |
| Can precede a noun? | Yes | Yes, depending on meaning |
| Best general choice | Often the safest choice | Useful when emphasizing participation in a process |
| Are they interchangeable? | Sometimes | Sometimes |
| Are both correct? | Yes | Yes |
Quick tip: If you could naturally replace assist with with help with, it is usually a good choice. If the sentence focuses on participating in an activity or process, assist in may fit better.
What Does “Assist” Mean?
Before comparing the two phrases, it helps to understand the verb assist itself.
Assist means to help someone do something or to help with a task, activity, or situation.
For example:
- “Can you assist me?”
- “The nurse assisted the doctor.”
- “She assisted with the research.”
- “They assisted in developing the new system.”
The verb is related to the idea of helping or supporting another person.
Is “Assist” Formal?
Assist is generally more formal than help.
Compare:
- “Can you help me?”
- “Can you assist me?”
Both are correct, but help is more natural in ordinary conversation. Assist is especially common in workplaces, customer service, official communication, academic writing, technical documents, and professional settings.
For example:
“Our staff will assist you with your application.”
This sounds professional and polite.
In casual conversation, however, a native speaker might simply say:
“Our staff will help you with your application.”
Assist as a Transitive Verb
Assist can take a direct object:
“The technician assisted the customer.”
It can also be followed by a prepositional phrase:
“The technician assisted with the installation.”
This flexibility is one reason learners sometimes become unsure about which construction to use.
What Does “Assist With” Mean?
Assist with means to help with a particular thing, task, responsibility, project, or activity.
The most common structure is:
assist with + noun
Examples:
- assist with a project
- assist with a task
- assist with paperwork
- assist with research
- assist with preparation
- assist with registration
- assist with installation
- assist with the process
Examples of Assist With
“Maria assisted with the event.”
Here, Maria helped with the event.
“The employee assisted with customer inquiries.”
The employee helped handle customer questions.
“I can assist with the paperwork.”
The speaker can help with the paperwork.
“Several volunteers assisted with the cleanup.”
The volunteers helped with the cleanup.
Assist With + -ing
You can also use assist with + gerund (-ing form).
Examples:
- “She assisted with organizing the conference.”
- “He assisted with preparing the report.”
- “They assisted with moving the equipment.”
- “We assisted with collecting the data.”
The -ing word functions as a noun-like activity.
So:
“She assisted with organizing the files.”
means:
“She helped with the activity of organizing the files.”
When Is “Assist With” Most Natural?
Use assist with when the focus is on the task, object, project, or responsibility that needs help.
For example:
“Can you assist with this report?”
The focus is the report.
“He assisted with the marketing campaign.”
The focus is the campaign.
“The receptionist assisted with customer requests.”
The focus is the requests.
This makes assist with particularly useful in workplace English.
Assist With in Professional Writing
You will often see this phrase in:
- job descriptions
- résumés
- business emails
- customer service messages
- workplace instructions
- project documentation
- administrative writing
For example:
“The intern assisted with preparing weekly reports.”
A job description might say:
“The administrative assistant will assist with scheduling meetings and maintaining records.”
This construction is clear and professional.
Common Collocations With “Assist With”
Some combinations sound especially natural:
- assist with a task
- assist with a project
- assist with research
- assist with preparation
- assist with planning
- assist with training
- assist with paperwork
- assist with installation
- assist with maintenance
- assist with development
- assist with arrangements
- assist with administration
These collocations are useful because they reflect common professional English patterns.
What Does “Assist In” Mean?
Assist in also means help, but it often emphasizes participation in an activity, process, operation, or outcome.
Common structures include:
assist in + noun
and
assist in + -ing verb
Examples:
“The software assists in data analysis.”
“She assisted in preparing the documents.”
“The team assisted in developing the new procedure.”
Assist In + -ing
One of the clearest patterns is:
assist in + gerund
For example:
“He assisted in developing the training program.”
The phrase emphasizes his participation in the process of developing the program.
Other examples include:
- assist in solving the problem
- assist in preparing the report
- assist in completing the application
- assist in improving performance
- assist in reducing costs
- assist in identifying errors
- assist in managing the project
- assist in creating the database
Assist In + Noun
Assist in can also be followed by a noun when the noun represents an area, process, or activity.
Examples:
“The technology assists in communication.”
“The program assists in education.”
“The treatment assists in recovery.”
However, the exact noun matters. Some combinations sound more natural than others.
For many ordinary physical tasks or specific objects, assist with may be more idiomatic:
“She assisted with the paperwork.”
rather than:
“She assisted in the paperwork.”
The second sentence may be grammatically possible in certain contexts, but it does not sound as natural in standard everyday English.
Assist In Often Sounds More Formal
Assist in frequently appears in formal, academic, technical, medical, scientific, and institutional writing.
For example:
“The findings may assist in identifying potential causes.”
That sounds natural in academic or technical prose.
You could say:
“The findings may help identify potential causes.”
That is simpler and more conversational.
This gives assist in a somewhat formal flavor.
Assist With or Assist In: The Key Difference
The easiest way to understand the distinction is to look at what receives the focus.
Assist With Focuses on the Thing Being Helped
“She assisted with the presentation.”
The presentation is the task she helped with.
“He assisted with the project.”
The project is the thing receiving attention.
Assist In Focuses on the Activity or Process
“She assisted in preparing the presentation.”
The emphasis is on the process of preparing it.
“He assisted in developing the project plan.”
The focus is on the activity of developing the plan.
This distinction is not an absolute grammatical rule. Native speakers can use the two patterns in overlapping situations.
A Useful Comparison
Compare these sentences:
I assisted with the report.
This means I helped with the report in some way.
I assisted in writing the report.
This tells us more specifically that I helped with the writing process.
The first focuses on the thing.
The second focuses on the activity.
That is the most useful practical distinction.
Can “Assist With” and “Assist In” Be Interchanged?
Sometimes, yes.
Consider:
“She assisted with the research.”
and:
“She assisted in the research.”
Both may be understood, but assisted with the research is generally more natural when simply describing someone helping with research.
Now compare:
“She assisted with conducting the research.”
and:
“She assisted in conducting the research.”
Both are grammatically possible. The second can sound slightly more formal and process-oriented.
So the two phrases overlap, but they are not always equally natural.
Best practice: Do not choose based on the idea that one preposition is always correct. Look at the noun or activity that follows assist.
Grammar: How to Use “Assist With”
The basic structure is:
Subject + assist + with + noun
Examples:
“Tom assisted with the project.”
“The technician assisted with the installation.”
You can also use:
Subject + assist + with + gerund
“Tom assisted with installing the equipment.”
Examples
- “She assisted with planning the meeting.”
- “He assisted with preparing the materials.”
- “We assisted with organizing the event.”
The with introduces the task or activity being helped.
Grammar: How to Use “Assist In”
The basic structure is:
Subject + assist + in + noun
or:
Subject + assist + in + gerund
Examples:
“The consultant assisted in the process.”
“The consultant assisted in improving the system.”
The second pattern is particularly useful in formal writing.
Why “-ing” After “In”?
The word in is a preposition. When a verb follows a preposition, English normally uses the -ing form, not the base form.
Therefore:
Correct:
“She assisted in preparing the documents.”
Incorrect:
“She assisted in prepare the documents.”
The same principle appears in other expressions:
- interested in learning
- involved in planning
- successful in solving
- experienced in managing
- assist in developing
Can You Say “Assist to”?
This is an important point.
Learners sometimes write:
“She assisted to prepare the report.”
In standard modern English, this is generally not the preferred construction.
Instead, write:
“She assisted in preparing the report.”
or:
“She assisted with preparing the report.”
Or, in simpler English:
“She helped prepare the report.”
The last version is especially natural in everyday English.
Assist Someone to Do Something
There is, however, another construction worth knowing:
“The guide assisted the visitors to enter the building.”
This pattern exists, particularly in some varieties of formal English, but assist someone in doing something or help someone do something is often more natural depending on the context.
For straightforward writing, avoid forcing assist to + verb.
Assist With or Assist In in American English
Both forms occur in American English.
However, assist with is extremely common in general professional and everyday contexts.
For example:
“Our team can assist with your request.”
This is a very natural customer-service expression.
Assist in is also common, particularly in formal, technical, academic, and institutional writing:
“The procedure assists in reducing errors.”
American English does not require one phrase to replace the other.
Assist With or Assist In in British English
British English also uses both constructions.
The same general distinction applies:
- assist with → help with a thing, task, or responsibility
- assist in → help with or participate in a process or activity
British professional writing may use assist in quite frequently, but this does not make assist with an American-only expression.
Both are standard English constructions.
Assist With or Assist In in Academic Writing
Academic writing often favors assist in when describing processes, functions, or outcomes.
For example:
“The model assists in identifying patterns in the data.”
This is formal and concise.
However, assist with is perfectly acceptable when referring to a specific academic task:
“The research assistant assisted with data collection.”
Another example:
“The student assisted with the preparation of the experiment.”
Here, with works naturally because the focus is the task.
Which Is Better for Academic Writing?
There is no universal rule.
Choose:
- assist with for a specific task, project, or responsibility
- assist in for an activity, process, or function
And remember that help is often clearer than assist when formality is not needed.
Assist With or Assist In in Business English
Both are useful in professional communication.
Use “Assist With” for Customer Service
“Our representative can assist with your request.”
“We can assist with the registration process.”
“Please contact us if you need assistance with your account.”
These sentences sound natural and professional.
Use “Assist In” for Processes
“This tool assists in improving workflow efficiency.”
“The department assists in developing company policies.”
“The system assists in identifying potential risks.”
Here, in naturally introduces the process or action.
20+ Real-Life Examples
The following examples show how native English usage changes according to context.
Everyday Conversation
- “Can you assist with these bags?”
- “She assisted with the cooking.”
- “I’ll assist with setting up the chairs.”
- “He assisted in finding the missing keys.”
- “Could you assist me with this form?”
Workplace English
- “The new employee assisted with the project.”
- “She assisted with preparing the monthly report.”
- “Our team assists with customer inquiries.”
- “The consultant assisted in developing the strategy.”
- “The software assists in identifying duplicate records.”
Business Emails
- “I’d be happy to assist with your request.”
- “Please let me know if I can assist with anything else.”
- “The finance team assisted in resolving the issue.”
- “We can assist with completing the registration.”
Academic Writing
- “The study assists in understanding consumer behavior.”
- “The research assistant assisted with data collection.”
- “The new method assists in detecting errors.”
- “Several students assisted with organizing the seminar.”
Professional Writing
- “The technician assisted with the installation.”
- “The system assists in monitoring network activity.”
- “The nurse assisted with patient preparation.”
- “The committee assisted in developing the recommendations.”
Social Media and Casual Posts
- “Huge thanks to everyone who assisted with the event!”
- “Our volunteers assisted with the cleanup.”
- “Thanks to everyone who assisted in making the day special.”
Notice how with is especially natural when the sentence names a thing or event, while in works well when the sentence describes a process or outcome.
Common Mistakes With Assist With and Assist In
Mistake 1: Using “Assist To” Automatically
Incorrect or awkward:
“She assisted to complete the application.”
Better:
“She assisted in completing the application.”
Also natural:
“She assisted with completing the application.”
Simplest:
“She helped complete the application.”
Mistake 2: Using “Assist In” With Every Noun
Awkward:
“He assisted in the paperwork.”
More natural:
“He assisted with the paperwork.”
Why? Paperwork is naturally understood as a task or thing someone helps with.
Mistake 3: Forgetting the -ing Form
Incorrect:
“The software assists in identify errors.”
Correct:
“The software assists in identifying errors.”
Because in is a preposition, the following verb takes the -ing form.
Mistake 4: Thinking One Phrase Is Always More Correct
It is incorrect to assume:
“Assist with is correct, but assist in is wrong.”
Both are standard constructions.
Likewise, it is wrong to claim:
“Assist in is formal, so it is always better.”
Formal does not automatically mean better. The best phrase is the one that fits the sentence naturally.
Mistake 5: Making Simple English Too Formal
Consider:
“I will assist in resolving your problem.”
This is grammatical and professional.
But in an informal conversation, you might simply say:
“I’ll help solve your problem.”
Clear writing does not require the most formal vocabulary available.
“Assist With” vs “Assist In” With Gerunds
This is one of the most useful areas to understand.
Both can be followed by an -ing form:
Assist With + -ing
“She assisted with preparing the presentation.”
Assist In + -ing
“She assisted in preparing the presentation.”
Both are correct.
The difference is subtle.
Assist with preparing presents the preparation as the task being helped with.
Assist in preparing presents preparation more strongly as the activity or process in which the person participated.
In many situations, the difference is small enough that either can work.
Which Sounds More Natural?
If you are unsure, assist with is often the safer general-purpose choice when referring to a specific thing or task.
For example:
“I assisted with the project.”
This is straightforward and natural.
If the sentence describes a process, assist in + -ing can be a particularly good choice:
“I assisted in developing the project.”
This sounds polished and professional.
However, if you want the most direct everyday English, help often wins:
“I helped develop the project.”
Good writing is not about choosing the most complicated expression. It is about choosing the clearest one.
Memory Tricks
Here are some simple ways to remember the difference.
Memory Trick 1: With = Thing
Think:
WITH = WHAT
Ask yourself:
“What am I helping with?”
If the answer is a thing, task, project, or responsibility, assist with is often a good choice.
assist with the project
assist with the paperwork
assist with the event
Memory Trick 2: In = Activity
Think:
IN = INVOLVED IN
If someone is participating in an activity or process, assist in may fit naturally.
assist in developing
assist in solving
assist in preparing
assist in reducing
Memory Trick 3: Help Test
Replace assist with help.
If you would naturally say:
“help with the project”
then:
“assist with the project”
is likely appropriate.
If you would say:
“help in developing the system”
then:
“assist in developing the system”
may work well.
Memory Trick 4: The -ing Test
When in is followed by a verb, remember:
in + -ing
So:
assist in preparing
not:
assist in prepare
A Simple Decision Guide
When choosing between the two phrases, follow these steps.
Step 1: Look at What Comes After “Assist”
Is it a thing, task, project, or responsibility?
Use assist with in many cases.
“assist with the project”
“assist with paperwork”
Step 2: Is It an Activity or Process?
If the focus is on doing something, assist in + -ing is often a strong choice.
“assist in completing the project”
“assist in improving performance”
Step 3: Consider the Tone
For ordinary professional English:
“assist with” is often natural.
For formal, academic, technical, or process-focused writing:
“assist in” can be especially suitable.
Step 4: Ask Whether “Help” Is Clearer
If the sentence sounds unnecessarily formal, replace assist with help.
“The program helps identify errors.”
This may be clearer than:
“The program assists in identifying errors.”
Both are grammatical, but the first is more direct.
Related Forms: Assistance and Assistant
Understanding the word family can also make these constructions easier.
Assistance
Assistance is the noun form.
Examples:
“Thank you for your assistance.”
“We need assistance with the application.”
“The customer requested assistance.”
Notice that assistance with is especially common.
Assistant
Assistant is a noun describing a person who helps, or an adjective in certain combinations.
Examples:
“She works as a research assistant.”
“The assistant manager reviewed the report.”
Assist
Assist is the verb:
“She assisted with the research.”
The three forms are:
- assist — verb
- assistance — noun
- assistant — noun/adjectival modifier
Assist With or Assistance With?
This is another useful distinction.
You can say:
“She assisted with the application.”
Or:
“She provided assistance with the application.”
Both are correct.
The second is more noun-heavy and may sound more formal.
For example:
“Thank you for your assistance with this matter.”
This is common in formal correspondence.
Assist With or Help With?
For many readers, this is actually the more useful comparison.
Help with is more common and conversational.
Assist with is more formal or professional.
Compare:
“Can you help with the project?”
“Can you assist with the project?”
Both are correct. The second sounds more formal.
In customer service:
“How may I assist you?”
is a standard professional expression.
In casual conversation:
“How can I help you?”
is usually more natural.
Assist In or Help In?
The same basic meaning applies.
“The research assists in understanding the problem.”
could become:
“The research helps in understanding the problem.”
But often, English would make the sentence even more direct:
“The research helps us understand the problem.”
This illustrates an important editing principle: do not preserve a formal construction merely because it is grammatical.
Choose the version that communicates the idea most clearly.
Formal vs Informal Usage
Formal
“The department will assist in resolving the matter.”
Neutral
“The department will assist with the matter.”
Informal
“The department will help with the problem.”
All three can communicate essentially the same idea, but their tone differs.
Assist often creates a more formal tone than help, while the choice between with and in depends more on the structure and meaning.
Style and Professional Writing Tips
When editing business, academic, or professional content, keep these principles in mind:
- Use assist with for specific tasks and responsibilities.
- Use assist in + -ing when emphasizing an activity or process.
- Do not assume assist in is always more formal and therefore better.
- Use help when plain language would be clearer.
- Avoid unnecessary repetition of assist in every sentence.
- Check the noun or verb following the preposition.
- Use in + -ing when a verb follows in.
- Read the complete sentence aloud to test naturalness.
FAQ: Assist With or Assist In
Is “assist with” grammatically correct?
Yes. Assist with is completely correct and widely used in standard English. It commonly means to help with a task, project, activity, responsibility, or thing.
Is “assist in” grammatically correct?
Yes. Assist in is also correct. It is especially common when describing participation in a process or activity, particularly before an -ing form.
Should I say “assist with” or “assist in”?
It depends on the context. Use assist with for many specific tasks, projects, and responsibilities. Use assist in when emphasizing participation in an activity or process.
Is “assist in doing” correct?
Yes. Assist in doing something is grammatically correct.
For example:
“The program assists in reducing costs.”
Because in is a preposition, the following verb uses the -ing form.
Is “assist with doing” correct?
Yes. Assist with doing something is also grammatically correct.
For example:
“She assisted with organizing the conference.”
However, depending on the sentence, assist in organizing or simply help organize may sound more natural.
Is “assist to” correct?
Assist to + base verb is generally not the best choice in standard modern English. Instead, use assist in + -ing, assist with + noun/-ing, or simply help + base verb.
For example:
“She helped prepare the report.”
Which is more formal: “assist with” or “assist in”?
Both can sound formal because assist itself is more formal than help. Assist in often has a particularly formal, academic, technical, or process-oriented feel, but this does not mean it is always preferable.
Is “assist with” more common than “assist in”?
In many everyday and professional contexts, assist with is very common, especially with nouns such as project, task, paperwork, event, research, installation, and request. Assist in is also common, particularly before -ing forms and in formal process-focused writing.
Can “assist with” and “assist in” mean the same thing?
Sometimes. They can overlap significantly, especially before an activity expressed with an -ing form. The choice often reflects what the writer wants to emphasize rather than a completely different meaning.
Final Verdict: Assist With or Assist In?
The final answer is simple:
Both “assist with” and “assist in” are correct.
There is no universal winner.
Choose assist with when you are talking about a thing, task, project, responsibility, or specific activity:
“She assisted with the project.”
“He assisted with the paperwork.”
“They assisted with organizing the event.”
Choose assist in when you want to emphasize participation in an activity, process, or outcome, especially with an -ing form:
“She assisted in developing the project.”
“He assisted in solving the problem.”
“The system assists in identifying errors.”
The most important grammar point is this:
assist in + -ing is correct, not assist in + base verb.
So write:
“assist in preparing”
not:
“assist in prepare.”
And remember that help is often the clearest alternative. In casual English, “help with” or “help do” may sound more natural than “assist with” or “assist in.”
The One-Sentence Rule to Remember
Use “assist with” for what you help with, and “assist in” for the activity or process you help carry out.
When both sound possible, choose the one that makes the sentence clearer and more natural—not simply the one that sounds more formal.
That is the real difference between assist with or assist in: both are legitimate English, but the best choice depends on what follows “assist,” what you want to emphasize, and how formal your writing needs to be.
Elon Parker is a dedicated writer at Wordscrowd, creating clear, informative, and engaging content for readers.
With a focus on useful information, Elon aims to make every article simple, reliable, and easy to understand.
