master's or masters: What's the difference & usage? 2026

If you’ve ever wondered whether to write “master’s” or “masters”, you’re not alone. Many students, professionals, and writers face this dilemma every day. The confusion often arises because both forms are correct in certain contexts but carry different meanings. Choosing the wrong one can make your writing look unprofessional, especially in academic or formal settings.

Understanding the difference is essential not just for grammar enthusiasts but also for anyone applying to universities, writing resumes, or drafting emails. The distinction matters for both UK and US English, although slight variations exist in spelling and usage.

In this article, we’ll break down the difference between “master’s” and “masters,” provide clear examples, highlight common mistakes, and give practical tips to remember the correct usage. By the end, you’ll have complete confidence in using these terms correctly.

Quick Answer

Simply put, “master’s” with an apostrophe is possessive, often referring to a degree (e.g., Master’s degree), meaning it belongs to a master. On the other hand, “masters” without an apostrophe is plural, referring to multiple people who are masters of a subject or skill.

Example:

Correct: She is pursuing a master’s degree in psychology.
Correct: The university organized a seminar for all the masters in engineering.

If you need an instant rule of thumb: use the apostrophe for degrees, and omit it when talking about multiple experts.

Meaning of the Correct Form

1. Master’s (with apostrophe)

“Master’s” is a possessive form. It is most commonly used in academic contexts to refer to a degree someone has earned.

Examples:

She completed her master’s in business administration last year.
He is applying for a master’s program in the UK.
My sister received her master’s certificate in literature.

UK vs US:

In both British and American English, master’s degree is standard and always includes the apostrophe.
In formal documents or CVs, writing “Masters degree” without the apostrophe is considered incorrect.

2. Plural Masters (without apostrophe)

“Masters” is the plural of “master”. It can refer to multiple experts, teachers, or skilled individuals.

Examples:

The art exhibition featured works by the masters of Renaissance painting.
Several chess masters competed in the tournament.
Yoga masters often teach advanced meditation techniques.

UK vs US:

Usage is identical in both British and American English.
Remember: No apostrophe is needed because this is not possessive.

Meaning of the Incorrect Form

A common mistake is writing “Masters” when referring to a degree or academic achievement.

Incorrect:

I just completed my Masters in Psychology.
She enrolled in a Masters program last fall.

Why it’s wrong:

In these cases, the apostrophe is essential to show possession the degree belongs to a master.

Another less common error is using “Master’s” for plural masters.

Incorrect:

The conference invited all the master’s of photography.

Correct:

The conference invited all the masters of photography.

Mistakes like these are especially common in informal writing, social media, or casual emails.

Keyword Comparison / Key Differences

Feature	Master’s (with apostrophe)	Masters (without apostrophe)
Form	Possessive	Plural
Meaning	Belonging to a master; academic degree	Multiple experts or skilled people
Common Usage	Master’s degree, master’s program	Masters in art, chess masters
Example (UK)	He earned his master’s degree in history.	Several masters attended the conference.
Example (US)	She is enrolled in a master’s program in the US.	The tournament hosted many chess masters.
Apostrophe Needed?	Yes	No

Key takeaway: The apostrophe signals possession, while the absence indicates plurality.

Common Mistakes People Make

Omitting the apostrophe in degrees:
- Incorrect: I completed my Masters in Biology.
- Correct: I completed my master’s in Biology.
Adding apostrophe for plurals:
- Incorrect: The chess master’s competed.
- Correct: The chess masters competed.
Confusing context: Using “masters” when talking about a single person:
- Incorrect: She is one of the top masters of cooking.
- Correct: She is a master of cooking.
Using US spelling rules in UK context incorrectly:
- In UK English, people might say “Master’s degree in Mathematics,” which is correct, same as in US English. Avoid dropping the apostrophe.
Using lowercase incorrectly in formal writing:
- Incorrect: He has a master’s degree in physics.
- Correct: He has a Master’s degree in Physics. (Capitalize in formal contexts if part of a title)

Correct Usage in Sentences

UK English Examples:

She has decided to pursue a Master’s degree in Sociology at Oxford University.
The conference was attended by renowned masters of classical music.
John’s master’s dissertation focused on environmental policy.
Art lovers admired the paintings of the old masters at the gallery.

US English Examples:

He is applying to a Master’s program in Computer Science at Harvard.
Chess masters from all over the country participated in the tournament.
The university awards a Master’s degree upon successful completion of the course.
The seminar featured world-renowned writing masters sharing their expertise.

Tips: In both UK and US English, when referring to a degree, “Master’s” should always include the apostrophe.

Tips to Remember the Correct Usage

Apostrophe = Possession:
- If it shows that the degree belongs to a master, use master’s.
No Apostrophe = Plural:
- If you are talking about more than one master, omit the apostrophe.
Think “Master’s Degree” as a title:
- Visualize the apostrophe as saying, “This is the degree of a master.”
Quick mnemonic:
- M.A. = Master’s Achievement → apostrophe signals the achievement belongs to the master.
Check the context:
- Academic context = master’s
- Referring to experts or skilled people = masters
Crosscheck for UK vs US spelling:
- Both regions use the apostrophe for degrees.
- Capitalization may vary depending on formal writing style guides.

FAQs

1. Can I write “Masters degree” without the apostrophe?
No. Always write master’s degree to show the possessive form.

2. Is “master’s” only used for degrees?
Primarily, yes, in modern English. Historically, it could also refer to someone who possesses authority.

3. How do I pluralize “master’s degree”?
You can say master’s degrees to refer to multiple degrees. Example: “Many students earned their master’s degrees this year.”

4. Are there any UK/US differences in usage?
Very minor. Both use master’s degree. Capitalization rules may differ depending on style guides.

5. Can “masters” be used for sports or games?
Yes. Example: “The Masters Golf Tournament features the best masters in the sport.”

6. How do I remember which one to use?
Remember: apostrophe = possession (degree), no apostrophe = plural (people).

7. Is “Master’s program” correct in both UK and US English?
Yes. Always include the apostrophe to indicate it is a program for someone pursuing a master’s degree.

Conclusion

In summary, the difference between master’s and masters is simple but important:

Master’s (with apostrophe): Possessive, used for academic degrees.
Masters (without apostrophe): Plural, used for multiple experts or skilled individuals.

By remembering the apostrophe rule and checking the context, you can write confidently and accurately in both UK and US English. This clarity will improve your academic writing, professional communication, and everyday writing.

Action Tip: Next time you write about degrees or experts, pause for a second and ask yourself: “Is this possession or plurality?” This simple check will help you avoid common mistakes and master the usage of master’s and masters effortlessly.