Have you ever wondered if to write “based on” or “based off of” in an essay, email, article, or everyday conversation? Both expressions are commonly used in English, and they generally communicate the same basic idea: something is developed, influenced, or created from another thing. However, they differ in usage, tone, and acceptance in formal writing. Understanding these differences can help you choose the right phrase for your audience and writing situation.
The phrase “based on” is the more widely accepted choice in standard written English. It works well in academic papers, professional documents, business communication, and everyday conversations. Meanwhile, “based off of” is common in informal American English, especially when discussing movies, books, ideas, and adaptations. Although many native English speakers use it naturally, some readers consider it less precise or less formal than “based on.” In this guide, you will learn the meanings of both expressions, explore their differences, review practical examples, and discover how to choose the most appropriate phrase.
Quick Answer
“Based on” is the preferred expression in formal and standard English because it clearly indicates that something relies on or derives from something else. “Based off of” is also widely used, particularly in informal American English, but it may sound less formal. When in doubt, choose “based on.”
Why People Confuse It
People often confuse “based on” and “based off of” because both expressions describe a relationship between an original source and something developed from it.
For example, a movie might be created from a novel, a business decision might rely on research, or an opinion might develop from personal experience. In each situation, speakers may use either expression to communicate a similar idea.
Several factors contribute to this confusion.
- Similar meanings: Both phrases can indicate that something originates from, depends on, or takes inspiration from another thing.
- Everyday speech: People frequently hear “based off of” in conversations, television shows, podcasts, and online discussions.
- Regional preferences: “Based off of” is especially common in American English, although “based on” remains widely used across English-speaking regions.
- Different levels of formality: Speakers may use “based off of” casually but choose “based on” when writing professional or academic material.
- Changing language habits: Common expressions can become more widespread even when some style guides continue to prefer another form.
The main point is that the phrases overlap in meaning, but they do not always create the same impression. Choosing between them often depends on your audience, purpose, and desired writing style.
First Word: Based On
“Based on” is a standard English expression meaning founded on, supported by, derived from, or developed using something as a starting point.
It is the safest choice when you want clear, natural, and professional writing.
The word “based” indicates that something has a foundation or source. The preposition “on” connects that foundation to the information, experience, evidence, or material supporting it.
Meaning of Based On
Depending on the context, “based on” can mean:
- Founded on: Something has a particular foundation.
- Supported by: A statement or conclusion relies on evidence.
- Derived from: Something comes from an existing source.
- Influenced by: An idea or decision develops partly because of something else.
- Created using: A product or creative work uses existing material as its source.
Examples of Based On
- The movie is based on a bestselling novel.
- Our decision was based on the available evidence.
- Her opinion is based on personal experience.
- The teacher created the lesson based on the students’ needs.
- The report is based on recent research.
- This character is based on a real person.
- The company developed its strategy based on customer feedback.
- His prediction was based on historical trends.
In each example, “based on” identifies the source, evidence, or foundation behind something.
When to Use Based On
Use “based on” when writing:
- Academic essays and research papers
- Business reports and professional emails
- News articles and informative content
- Formal presentations and proposals
- Reviews of books, movies, and television shows
- Explanations involving evidence or research
- Everyday messages when you want a neutral, widely accepted expression
Example: “The recommendation is based on the results of the latest survey.”
This sentence sounds clear and professional because it identifies the evidence supporting the recommendation.
Second Word: Based Off Of
“Based off of” is an informal expression commonly used to mean derived from, modeled after, or developed using something as a starting point.
It is particularly common in conversational American English. Speakers often use it when discussing creative works, personal ideas, designs, and adaptations.
Although many people use this expression naturally, some readers and editors prefer “based on,” especially in formal writing.
Meaning of Based Off Of
In everyday use, “based off of” can communicate several related ideas:
- Derived from: Something comes from an existing source.
- Modeled after: Something follows the characteristics of an example.
- Inspired by: Something takes ideas from another work or experience.
- Developed from: Something begins with an existing idea or design.
The intended meaning usually becomes clear from the surrounding sentence.
Examples of Based Off Of
- The movie is based off of a popular video game.
- Her character was based off of someone she knew in college.
- The designer created the dress based off of an old photograph.
- This fictional town was based off of a real location.
- The new product was developed based off of customer suggestions.
- His drawing was based off of a photograph.
- The television series is based off of a collection of short stories.
- The game was designed based off of feedback from players.
These sentences are understandable and commonly heard, especially in casual American conversation.
However, in edited writing, you can usually replace “based off of” with “based on” without changing the intended meaning.
For example:
- Less formal: The movie is based off of a novel.
- Preferred in standard writing: The movie is based on a novel.
Is Based Off Of Grammatically Correct?
“Based off of” is an established expression in contemporary English usage, and it is common in informal American speech. However, it remains less widely preferred in formal edited English than “based on.”
Some critics object to the expression because “off” can suggest separation rather than a foundation or supporting source. Others accept it as a natural development in everyday language.
The practical distinction is straightforward: “Based off of” is understandable and widely used, but “based on” is generally the better choice for formal and professional writing.
Comparison Table
| Feature | Based On | Based Off Of |
|---|---|---|
| Basic meaning | Founded on or derived from something | Derived from or modeled after something |
| Formality | Neutral and suitable for formal writing | Generally more informal |
| Academic writing | Preferred | Usually better replaced with “based on” |
| Business communication | Recommended | May sound too conversational |
| American English | Very common | Common, especially in informal speech |
| British English | Standard and widely accepted | Less conventional |
| Movie and book adaptations | Commonly used | Also used, especially in casual conversation |
| Grammar and usage preference | Standard choice | Accepted in common usage but sometimes criticized |
| Best choice when uncertain | Yes | Usually no |
The key difference is not that one expression is always understandable and the other is not. Both can communicate a similar meaning, but “based on” is the more versatile and widely preferred option.
When to Use Each
Choosing between “based on” and “based off of” becomes easier when you consider your writing situation.
1. Use Based On in Formal Writing
When writing an academic assignment, research report, business proposal, or professional email, choose “based on.”
Examples:
- The findings are based on reliable evidence.
- The final grade is based on the student’s performance.
- Our proposal is based on the client’s requirements.
This expression is direct, professional, and unlikely to distract readers.
2. Use Based On for Research and Evidence
When explaining how you reached a conclusion, “based on” is the natural choice.
Examples:
- Based on the available data, sales are expected to increase.
- The conclusion is based on several independent studies.
- Based on your feedback, we have updated the design.
In these examples, the phrase connects a decision or conclusion to the information supporting it.
3. Use Based On for Creative Adaptations
When discussing a movie, novel, television series, or video game, “based on” clearly identifies the original source.
Examples:
- The film is based on a true story.
- The series is based on a fantasy novel.
- The character is based on a historical figure.
Although “based off of” also appears in these contexts, “based on” is the more conventional choice.
4. Use Based Off Of in Casual Conversation if It Fits Your Voice
In relaxed conversations, especially in American English, “based off of” may sound natural to the speaker and audience.
For example:
- “I based the design off of your original sketch.”
- “The game is based off of an older version.”
- “She based her character off of her best friend.”
These sentences are readily understandable. Nevertheless, “based on” would also work in each case and would be more suitable if the conversation were part of a formal presentation or published document.
5. Follow Your Organization’s Style Guide
Some workplaces, publications, and educational institutions have specific preferences for word choice.
If a style guide recommends “based on,” follow that guidance consistently. This is particularly important for professional editors, content writers, students, and anyone producing material for a specific publication.
Examples: Based On vs. Based Off Of
The following examples demonstrate how both expressions work and why “based on” is often the better choice in standard writing.
Example 1: A Movie
- Preferred: The movie is based on a bestselling book.
- Informal alternative: The movie is based off of a bestselling book.
Explanation: Both sentences communicate that the book is the movie’s source. The first is the more conventional choice.
Example 2: A Research Report
- Preferred: The report is based on the latest scientific findings.
- Less formal alternative: The report is based off of the latest scientific findings.
Explanation: “Based on” is more appropriate when discussing evidence and research.
Example 3: A Business Decision
- Preferred: Our decision was based on customer feedback.
- Informal alternative: Our decision was based off of customer feedback.
Explanation: The first sentence is more polished for business communication.
Example 4: A Drawing
- Preferred: The artist created the drawing based on a photograph.
- Informal alternative: The artist created the drawing based off of a photograph.
Explanation: Both expressions indicate that the photograph served as the source.
Example 5: A Fictional Character
- Preferred: The character is based on a real person.
- Informal alternative: The character is based off of a real person.
Explanation: “Based on” is suitable for both formal writing and casual conversation.
Example 6: A School Project
- Preferred: My presentation is based on the information in our textbook.
- Informal alternative: My presentation is based off of the information in our textbook.
Explanation: Students should generally choose “based on” for assignments.
Example 7: A Product Design
- Preferred: The new design is based on customer suggestions.
- Informal alternative: The new design is based off of customer suggestions.
Explanation: The preferred version sounds more professional in a workplace setting.
Example 8: A Personal Opinion
- Preferred: Her opinion is based on years of experience.
- Informal alternative: Her opinion is based off of years of experience.
Explanation: “Based on” clearly identifies the foundation of her opinion.
Example 9: A Video Game
- Preferred: The game is based on a classic adventure novel.
- Informal alternative: The game is based off of a classic adventure novel.
Explanation: Both versions are understandable, but the first is the more standard construction.
Example 10: A Marketing Strategy
- Preferred: Our marketing strategy is based on customer behavior.
- Informal alternative: Our marketing strategy is based off of customer behavior.
Explanation: “Based on” is preferable in reports, proposals, and presentations.
Example 11: A Historical Story
- Preferred: The novel is based on events from the nineteenth century.
- Informal alternative: The novel is based off of events from the nineteenth century.
Explanation: The first version is a natural choice for literary discussions.
Example 12: A Personal Experience
- Preferred: I based my advice on what I learned from my mistakes.
- Informal alternative: I based my advice off of what I learned from my mistakes.
Explanation: “Based on” is concise and widely accepted.
Example 13: A Lesson Plan
- Preferred: The teacher based the lesson plan on the students’ abilities.
- Informal alternative: The teacher based the lesson plan off of the students’ abilities.
Explanation: The preferred version works well in educational and professional contexts.
Example 14: A True Story
- Preferred: The television series is based on the life of a famous scientist.
- Informal alternative: The television series is based off of the life of a famous scientist.
Explanation: “Based on” is the conventional expression for identifying the source of a dramatized story.
Example 15: A Prediction
- Preferred: The forecast is based on current weather data.
- Informal alternative: The forecast is based off of current weather data.
Explanation: When referring to data or evidence, “based on” is the clearest choice.
What do these examples show?
In most cases, you can replace “based off of” with “based on” while keeping the intended meaning. The choice of “based on” generally produces more conventional, polished writing without making the sentence sound unnatural.
Common Mistakes
Even experienced English speakers sometimes misuse these expressions. Understanding the following mistakes can improve your grammar and word choice.
Mistake 1: Assuming Both Phrases Are Equally Formal
Although both expressions are common, they do not have the same level of acceptance in formal writing.
Incorrect assumption: “Based off of” is always just as suitable as “based on.”
Better approach: Use “based on” in academic, professional, and edited writing unless you have a specific reason to retain the informal expression.
Mistake 2: Using Based Off Of in Academic Essays
Consider this sentence:
“My conclusion is based off of the evidence.”
The meaning is clear, but the phrasing may sound less polished in an academic essay.
Better version: “My conclusion is based on the evidence.”
Mistake 3: Thinking Based Off Of Is Always Grammatically Impossible
Some people claim that “based off of” is never correct English.
That claim is too absolute. The expression is widely used in contemporary English, especially in informal American speech. However, it is not the preferred choice in many formal contexts.
A better approach is to distinguish between common conversational usage and standard edited usage.
Mistake 4: Adding Unnecessary Words
Writers sometimes create unnecessarily complicated sentences when a shorter expression would communicate the same idea.
Wordy: “The project was created based off of the information that was provided to us.”
Clearer: “The project was based on the information provided to us.”
The revised sentence is shorter and easier to understand.
Mistake 5: Confusing Inspiration With Direct Adaptation
“Based on” can describe a close relationship with a source, but it can also describe a broad foundation or influence.
For example:
- The film is based on a novel.
- The painting was inspired by a dream.
These sentences are not necessarily interchangeable. The first identifies a source, while the second emphasizes inspiration.
Choose words that accurately describe the relationship rather than focusing only on which phrase sounds more formal.
Mistake 6: Ignoring the Audience
Language choices depend partly on context.
A casual conversation with friends may allow informal expressions that would be less suitable in a university assignment or business report.
Tip: When writing for an unfamiliar audience, choose the expression that is clear, conventional, and widely accepted.
Memory Trick
Remember this simple rule:
“Based ON” is the standard choice for writing.
Think of the word “on” as a foundation that supports something.
For example, a house stands on a foundation, and a conclusion rests on evidence. Similarly, a report can be based on research.
Use this memory trick:
- Based ON = standard, formal, and versatile.
- Based OFF OF = common in informal American English.
Here is another easy way to remember the distinction:
If you are writing an essay, preparing a report, publishing an article, or sending a professional email, choose “based on.”
If you are having a casual conversation and naturally use “based off of,” your meaning will usually be understood.
When you are unsure, remember the simplest rule: Choose “based on” to avoid unnecessary criticism of your word choice.
American vs. British English
The expressions “based on” and “based off of” are not used identically in every English-speaking community.
American English
In American English, both expressions are common, but they often appear in different contexts.
“Based on” is widely used in formal writing, professional communication, journalism, and everyday speech.
“Based off of” is also common, particularly in informal conversations and discussions about movies, books, games, designs, and creative projects.
Examples:
- American standard usage: The movie is based on a true story.
- American informal usage: The movie is based off of a true story.
Both sentences are understandable, although the first is the more conventional option for formal writing.
British English
In British English, “based on” is the standard and widely accepted expression.
“Based off of” is less conventional and may sound informal or influenced by American usage to some British readers.
Examples:
- Preferred: The documentary is based on historical records.
- Less conventional: The documentary is based off of historical records.
For academic writing, professional communication, and British English content, “based on” is the safer choice.
Which Expression Should International English Learners Use?
If you are learning English as a second language, writing for an international audience, or producing SEO content, choose “based on.”
It is widely understood across English-speaking regions and works naturally in formal and informal situations.
This makes it a practical choice for students, teachers, writers, editors, and content creators.
Similar Words and Expressions
Several other expressions can replace “based on” or “based off of,” depending on the intended meaning.
| Expression | Meaning | Example |
|---|---|---|
| Founded on | Established using something as a foundation | The policy is founded on fairness. |
| Derived from | Originating from a particular source | The word is derived from Latin. |
| Built on | Developed using something as a foundation | The project is built on earlier research. |
| Grounded in | Firmly supported by evidence or principles | Her argument is grounded in facts. |
| Inspired by | Influenced by an idea, person, or experience | The painting was inspired by nature. |
| Adapted from | Changed from an original work into another form | The play was adapted from a novel. |
| Modeled after | Designed to resemble an existing example | The building was modeled after a historic structure. |
| Informed by | Shaped by information or experience | The policy was informed by public feedback. |
| Drawn from | Obtained or taken from a source | The examples were drawn from real conversations. |
| Rooted in | Having its origin or foundation in something | The tradition is rooted in local history. |
Which Alternative Should You Choose?
The best alternative depends on what you want to communicate.
- Use founded on when emphasizing the underlying principles of something.
- Use derived from when describing the origin of information, words, or ideas.
- Use grounded in when emphasizing evidence or sound reasoning.
- Use inspired by when describing creative influence rather than direct dependence.
- Use adapted from when a work has been changed from an original source.
- Use modeled after when something has been designed to resemble another thing.
These alternatives can make your writing more precise because they describe the relationship between the source and the result more specifically.
FAQs:
1. Is Based On or Based Off Of Correct?
Both expressions are used in contemporary English, and both can communicate that something comes from or relies on a source. However, “based on” is the standard, widely preferred expression in formal and professional writing.
2. Is Based Off Of Grammatically Correct?
“Based off of” is common in informal English, particularly in the United States. Some readers and editors consider it nonstandard or less desirable in formal writing. For the broadest acceptance, use “based on.”
3. Why Do Americans Say Based Off Of?
Many Americans use “based off of” as a conversational alternative to “based on.” It is particularly common when discussing movies, books, designs, fictional characters, and ideas. Its popularity in everyday speech does not mean it is the preferred choice for formal writing.
4. Is Based Off Of Informal?
Yes, it is generally considered more informal than “based on.” Although it appears in many everyday conversations and published discussions, “based on” is more conventional in academic, business, and professional contexts.
5. Should I Use Based On in an Academic Essay?
Yes. “Based on” is the recommended choice for academic essays, research papers, reports, and assignments. It communicates the relationship between evidence and conclusions clearly and avoids distracting readers with a disputed usage choice.
6. Is Based Off Of More Common in American English?
“Based off of” is particularly familiar in informal American English. However, “based on” is also extremely common in the United States and remains the more widely preferred option in formal writing.
7. Can I Replace Based Off Of With Based On?
In most sentences, yes. For example, “The film is based off of a novel” can become “The film is based on a novel.” The revised sentence preserves the intended meaning while using the more conventional expression.
8. Which Phrase Is Better for SEO Articles?
“Based on” is generally the better choice for SEO articles because it is natural, widely accepted, and appropriate for an educational or professional audience. However, when discussing the exact phrase “based off of,” include it where relevant to answer readers’ questions accurately.
Final Verdict
When choosing between “based on” and “based off of,” “based on” is the best default choice for standard English writing. It is appropriate for academic assignments, professional emails, business reports, creative discussions, and everyday communication. Its broad acceptance makes it especially useful when writing for an international audience.
“Based off of” is common in informal American English and is generally understood to express a similar meaning. Nevertheless, some readers consider it less formal or less conventional. If your goal is to write clearly, professionally, and confidently, use “based on” unless the context specifically calls for informal conversational language.
Remember This
- Based on: The standard and preferred expression for formal and everyday writing.
- Based off of: A common informal expression, particularly in American English.
- For essays and professional documents: Choose “based on.”
- For casual conversations: “Based off of” may be acceptable when it suits your audience.
- When in doubt: Use “based on” for clear, conventional English.
Conclusion
Understanding the difference between “based on” and “based off of” helps you make better word choices in everyday conversations, academic assignments, and professional writing. Although both expressions can communicate a similar relationship between a source and a result, they differ in formality and general acceptance. “Based on” remains the more conventional option, while “based off of” is widely used in informal American English.
The easiest way to remember the distinction is to choose “based on” whenever you want your writing to sound clear, polished, and professional. If you are explaining research findings, describing a movie adaptation, discussing a design, or presenting an argument, this expression will usually serve you well. By understanding the context and audience, you can communicate naturally while maintaining good English usage.
