In the past, the term “adviser” was used as a trade name. The word “adviser” was once used as a trade name.

You’re composing a letter to your financial adviser. Or is it an advisor? You stop typing, the cursor blinks, and then you see a word you’ve typed 100 times that looks wrong. Both.

It’s more common than you would think with that little hesitation. Google won’t even blink if you type either one in a search bar. Neither one will be picked up by the spell check. But still many people secretly wonder if they’re using the “right” one, every time they write it.

The short version: You are NOT out of your mind. Both spellings are correct. Not a typographical error, this is a case where the writing wasn’t the problem. One of those English words that can be divided into two accepted spellings and both are right.

It doesn’t mean it’s a random selection, though. Style Guides get opinions. Industries have habits. In fact, if you’re targeting a particular audience, the spelling they expect is more important than you think.

So let’s get this straight. At the end of this, you will know which spelling to use, why the mix up began in the first place, and how to ensure that a minor style choice doesn’t make your writing appear incoherent.

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The word for a person who gives advice or guidance is both “adviser” and “advisor”. They are the same in meaning, pronunciation, and grammar. It is a matter of style and not correctness.

For instance, one college could have an “academic adviser” in one handbook and an “academic advisor” in another, and that’s okay.

While a business card of a financial professional may read “Senior Investment Advisor,” a document of the same type may read “adviser to the board” in a formal document. There is no right or wrong with either.

For posterity: adviser and advisor are the same word in two different suits.

The Origin of Adviser and Advisor

This one comes back to the role of agent nouns in English; words that we make when we want to describe “a person who does the action.”

Usually, verbs that have been borrowed from French will tend to have “er” added to them, and some Latin-based verb will tend to have “or” added to them (like teacher, writer, director, actor).

Advise is a verb, and the pattern you should follow would be to get the “er” ending from English that most speakers of the language use by default: adviser.

Actually, this is the older and more traditional spelling, and this is the spelling that most style guides still gravitate towards.

The influence of the noun “advisory” and other “or” ending professions such as doctor, professor, and counselor, which had already become common, is evident in the arrival of “advisor.”

As “advisor” began to be used in job postings and official papers, it became commonplace—particularly in a business or government setting.

So it’s not a British vs American English thing. It’s the story of 2 spellings that coexisted and never really became one.

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Style Guide Differences

This is not a real split between “color” and “colour”, but rather which spelling is preferred by different style guides and industries.

Journalism (AP Style)

Most American newspapers and news sites prefer advisers in AP Style. When you’re writing in a journalism style or according to the AP style guide, an adviser is better.

Business and Finance

Advisor is the most favored word in the context of business and finance.

The spelling “or” is common in job titles such as “Financial Advisor” or “Investment Advisor,” as it has been for decades, and is often the way these job positions are branded by licensing entities and firms.

Academic Writing

In academic environments, there’s indeed a real division. Some universities prefer the term “academic adviser,” others find it easier to use “academic advisor,” and it’s sometimes a matter of the spelling that appeared in the handbook decades ago, and has never been changed.

Government and Legal Writing

With government and legal writing, the older, formal traditions are more likely to use adviser, although you will find it in official titles, too.

Preferred Spelling by Context

Context	Preferred Spelling	Example
Journalism (AP Style)	Adviser	The senator’s adviser did not comment.
Financial services	Advisor	She is a Financial Advisor in the Financial Services firm.
Academic writing	Either (check style guide)	Speak with your academic adviser/advisor.
Government documents	Adviser (traditionally)	The national security adviser briefed the president.
General writing	Either	My advisor provided me with excellent feedback.

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Which Spelling to Use?

Now the fun really begins. Don’t memorize a rule! Simply connect with your audience.

For a newspaper or magazine in the United States, use an adviser. It is the house style default and will probably be changed by editor to editor anyway.

Use advisor if you’re in finance, consulting, or any profession that includes “advisor” in the official title of your job. For people who don’t know, even if you’re technically correct, it looks poor when you’re challenging a whole entire industry.

This is, of course, as is to be expected, the case in the UK and other Commonwealth countries, where both are seen, but adviser is a bit more frequently used in formal and journalistic contexts.

If you are just writing a blog post, email, or something that does not require a strict style guide, then choose one and stick to it.

It is important that it is consistent rather than the actual choice.

Avoid using the alternate names of adviser and advisor in the same document.

Common Errors in Using Adviser and Advisor

Error #1: Changing the Spelling in the Same Document

Error #1: Changing the spelling of words in the same document. It occurs all the time when writers copy and paste from various sources. Use the find and search function before publishing to find both spellings, then fix it.

Error #2: Thinking One Is a Typographical Error

Error #2: Confusing one with a typographical error. People really do send email to coworkers to “fix” the other spelling. One doesn’t need to be repaired, and the other doesn’t need to be mended. Avoid the embarrassing email.

Error #3: Using Advisor in AP Style Journalism

Mistake #3: Using advisors in AP Style journalism. This is marked as an error in editing if you’re writing for an AP Style publication. Before submission, here are some things to know.

Error #4: Changing an Official Job Title

Pitfall #4: Using the term “adviser” in a formally registered job title as “Advisor”. Even if grammatically correct, using “Financial Adviser” in a press release or bio may be inconsistent with the company’s official name when the company’s name is “Financial Advisor.”

Error #5: Thinking It Is British vs. American

Mistake #5: Thinking it is British vs. American. It’s easy to put this in the same category as color and colour, but it’s not. The two spellings are found in the U.S., U.K., and anywhere else. It is a style thing, and not geographical.

Error #6: Overthinking Casual Writing

Mistake #6: Thinking too much when writing casually. Truthfully, even a good writer can get this wrong. Either spelling will do if you’re texting a friend or writing a quick note. Use the precise tone for formal purposes.

Examples

Example 1

Instructs people properly in the fundamentals of their faith.
Teaches people correctly the basics of their faith.

Example 2

“I’d like to reach out to you, before finalizing the budget for next month, to discuss the details with your financial advisor”, wrote in an email.

See business context, which is pushed towards advisors.

Example 3

Headline:
“White House Adviser Resigns as Policy Change Takes Root.”

This is the preference of advisers in political and journalistic writing, which adhered to AP Style.

Example 4

“Just met with my career advisor, so glad I am so clear on next steps!” (tweet)

This type of writing is generally not subject to much critical analysis in casual writing.

Example 5

“The Board shall appoint an independent adviser to examine all financial disclosures,” in a formal document.

The more traditional spelling is used in legal and governance papers.

Example 6

The application of these two particular advisers are quite similar.

These are two specific advisers that share a similar application.

Search Trends and Usage

This is a general guideline for word usage in writing, rather than data from live searches as would be used for this article. There are however some patterns that should be familiar.

It’s because job postings and LinkedIn profiles are written that way that Advisor rules the roost in finance, careers, and business-related searches.

Adviser is more of a presence in news reporting, politics, government reporting, and academic style guides.

Overall, advisor has slightly more search volume globally, perhaps due to its prevalence across a wide range of industries from marketing, higher education, to finance, where it serves as the name for professionals.

When optimizing for search, it’s worth considering using both spellings, somewhere in the natural flow of your writing, as people will search for the word either way depending on their habit and industry background.

Adviser and Advisor – Comparison Table

Feature	Adviser	Advisor
Homonyms	Those that sound the same but have different meanings	Same, no difference
Preferred Use	AP Style, government, legal writing	Finance, business, job titles
Origin	Older, more traditional spelling	Later variant, associated with “advisory”
Common In	Journalism, formal documents	Corporate titles, LinkedIn, marketing
Accuracy	Correct	Correct

FAQs

Should it be adviser or advisor?

Both are correct spellings and have the same meaning. The choice of which to use will depend on the style guide you are using or the industry you are writing for, rather than on the rules of grammar.

Which spelling is the more common one?

Advisor is more prevalent in business and finance-related positions and titles, whereas adviser is more prevalent in journalism, government writing, and AP Style.

Who is the American and the British adviser?

No, that’s a common thought, but it’s not true. The two spellings are used worldwide in the U.S., U.K., and all other English-speaking countries. It is not a regional difference like colour/color.

What is the Role of a Financial Counsellor?

A financial advisor assists clients in handling finances, making investment plans, and planning for objectives such as retirement.

The spelling of the job title varies from company to company, but the position itself is identical, no matter what spelling is used.

Why Is the Same Word Spelt Differently?

Sometimes English agent nouns evolved two alternative endings: “er” and “or”, and the latter did not completely replace the former over time.

Does Spell Check Treat One as a Misspelling?

No. Both adviser and advisor are accepted by most spell checkers as standard dictionary words.

What’s the Difference Between Adviser and Advisor?

Use the same spelling as the official job title you had or are applying for.

If the position is titled Advisor, use that spelling in your resume.

Is One Spelling More Formal?

Adviser is sometimes viewed as the more traditional or formal option. This is one reason why legal and governmental documents tend to use it.

However, advisor is not incorrect in formal writing.

Conclusion

There is no mistake in the words adviser and advisor.

The true answer is context.

Business/finance leans towards advisor, while adviser is common in journalism, government, and other formal writing. In every case, consistency within the writing is what matters most.

One takeaway: Choose a spelling according to your audience or style guide and maintain it throughout the document. It will help your writing more than you can possibly imagine.

Whenever you next proofread something you’ve written some time ago, search for both spellings. You may be surprised at the frequency with which they’ve made unnoticed moves in your writing.