Have you ever typed a sentence and suddenly wondered, “Is it their or thier?”
This is a very common spelling mistake. The letters look almost the same, and thier can feel natural when you type quickly. But there is an important difference: their is the correct English spelling, while thier is a misspelling.
You may see this confusion in school assignments, emails, text messages, social media posts, workplace writing, and everyday conversations. Even strong English learners sometimes mix up these letters.
The word their is a possessive determiner. It shows that something belongs to or is connected with more than one person. For example, “The students finished their homework.”
People usually search for:
- their or thier correct spelling
- their meaning
- how to spell their
- their pronunciation
- their examples
- their definition
- their grammar
- difference between their and thier
- why is thier wrong
- how to remember their spelling
The good news is that this mistake is easy to fix once you learn one simple rule.
In this guide, you’ll learn the meaning, pronunciation, examples, usage, grammar rules, common mistakes, expert tips, and simple explanations in easy English.
Their or Thier – Quick Answer
👉 Their = correct spelling
👉 Thier = incorrect spelling
Their is used to show possession or connection with people or, in some cases, a singular person when gender is unknown or not specified.
Examples:
- The children packed their bags.
- The employees returned to their offices.
- Someone left their phone here.
- The players celebrated their victory.
- They brought their own food.
Simple Rule:
👉 Always spell it their, not thier.
A useful memory trick is to remember that “ei” comes after th in their:
th + ei + r = their
What Does Their Mean?
Their is a possessive word. It tells us that something belongs to, relates to, or is connected with someone.
For example:
The students opened their books.
Here, their shows that the books belong to the students.
Their is commonly used with plural nouns:
- their house
- their car
- their parents
- their ideas
- their teacher
It can also be used with singular they:
Every student should bring their notebook.
Synonyms and Related Terms
Their does not have a perfect synonym in every sentence, but related possessive expressions include:
- belonging to them
- owned by them
- associated with them
Related Words
Do not confuse their with:
- there — refers to a place or position
- they’re — short for “they are”
- thier — incorrect spelling
These three words are among the most common English spelling and grammar confusions.
The Origin of Their
The word their has a long history in the English language.
It developed from older forms related to the pronoun they. Over time, English speakers and writers used forms similar to their to express possession.
Modern English eventually settled on their as the standard spelling.
The incorrect form thier is not a separate English word. It is usually a spelling error caused by putting the letters i and e in the wrong order.
How to Pronounce Their
Their is usually pronounced like:
their → thair
It has one syllable.
The pronunciation is very close to there, which is why context is important when speaking.
For example:
Their house is beautiful.
and
The house is over there.
The words sound almost identical, but their meanings and spellings are different.
Common Pronunciation Mistake
There is no special pronunciation for thier because thier is not the standard English word.
When you mean possession, pronounce and write their.
British English vs American English Usage
| Feature | British English | American English | Notes |
|---|---|---|---|
| Correct spelling | their | their | Same spelling |
| Incorrect spelling | thier | thier | Misspelling |
| Meaning | Possession/connection | Possession/connection | Same basic meaning |
| Pronunciation | Similar to “thair” | Similar to “thair” | Nearly identical |
| Formal writing | their | their | Standard form |
| Texting | their | their | Informal writing may contain typos |
There is no British-versus-American spelling difference between their and thier.
Their is correct in both varieties of English.
Which One Should You Use: Their or Thier?
Use their whenever you want to show possession or connection.
Use “their” in:
- School assignments
- Essays
- Emails
- Business writing
- Text messages
- Social media
- Websites
- Reports
- Everyday conversations
Quick examples
✔ Their dog is very friendly.
✔ The workers finished their project.
❌ Thier dog is very friendly.
❌ The workers finished thier project.
The second form is simply a spelling mistake.
Common Mistakes With Their or Thier
Mistake 1: Writing “thier”
❌ They forgot thier keys.
✔ They forgot their keys.
Why it happens:
The letters i and e are easy to reverse.
Tip: Remember their, not thier.
Mistake 2: Confusing Their With There
❌ The students left there books at home.
✔ The students left their books at home.
Why:
Their shows possession. There usually refers to a place.
Mistake 3: Confusing Their With They’re
❌ Their going to the store.
✔ They’re going to the store.
Why:
They’re means they are.
Try replacing the word with “they are.” If the sentence works, you probably need they’re.
Mistake 4: Thinking “thier” Has a Different Meaning
❌ I thought “thier” was another form of their.
✔ Thier is simply a misspelling.
There is no standard English meaning for thier.
Mistake 5: Using Their With a Singular Noun Incorrectly
This can depend on the sentence.
✔ The children brought their lunches.
Here, their refers to multiple children.
But singular they is also standard in many situations:
✔ Every student should check their answer.
Their in Everyday Examples
At Work
The employees shared their ideas during the meeting.
At School
The students submitted their assignments.
In Social Media
Everyone is sharing their favorite photos.
In Daily Life
The neighbors painted their house.
an Email
Please ask the team to send their final report.
a Text Message
The kids are bringing their games.
Online Content
Users can create their own accounts.
Conversation
They said their car was outside.
Their in Different Contexts
Education
Students often use their when talking about people who own or have something.
Students should bring their books to class.
Business
In professional writing, correct spelling matters because small mistakes can affect credibility.
The company asked employees to update their information.
Social Media
People frequently use their in posts, comments, and captions.
Everyone has their own opinion.
Grammar Learning
For beginners, the biggest challenge is remembering the difference between:
their = possession
there = place
they’re = they are
This three-word comparison is one of the most useful English grammar lessons to learn.
Their or Thier – Google Searches and Common Questions
People often search “their or thier” because spell-check tools may catch thier after the word has already been typed.
Common long-tail searches include:
- Is thier a word?
- Is their the correct spelling?
- How do you spell their?
- What does their mean?
- How do you use their in a sentence?
- Is thier grammatically correct?
- What is the difference between their and there?
- What is the difference between their and they’re?
- Why do I keep spelling their wrong?
- How do you remember the spelling of their?
These questions all point to the same basic answer: their is the correct spelling.
Comparison Table: Their vs Thier
| Feature | Their | Thier |
|---|---|---|
| Correct spelling | ✅ Yes | ❌ No |
| Standard English word | ✅ Yes | ❌ No |
| Shows possession | ✅ Yes | ❌ No |
| Used in formal writing | ✅ Yes | ❌ No |
| Used in texting | ✅ Yes | ❌ Only as a typo |
| Pronunciation | “thair” | Not a standard word |
| Common issue | Confused with there/they’re | Letters reversed |
Their in Professional Life
Correct spelling is especially important in professional communication.
Imagine sending a customer an email that says:
“Please contact thier manager.”
The reader will understand the meaning, but the spelling error looks careless.
A better version is:
“Please contact their manager.”
In resumes, reports, emails, proposals, and business documents, always use their.
Their for Students and Beginners
If you are learning English, do not feel bad about making this mistake.
The words their, there, and they’re are confusing even for native speakers.
Start with these three simple rules:
- Their = belongs to them
- There = a place
- They’re = they are
Examples
That is their house.
The house is over there.
They’re going home.
Learning these three patterns can prevent many common English mistakes.
Common Uses of Their
You will often see their before:
- house
- car
- family
- friends
- parents
- children
- job
- school
- team
- ideas
- opinions
- belongings
- responsibilities
For example:
They brought their children.
The company changed their policy.
The players wore their uniforms.
Simple Trick to Remember Their
Here is an easy memory rule:
Their = possession.
Think about something belonging to people.
They have a car → It is their car.
They have a house → It is their house.
Think of it this way:
When you see their, think:
“It belongs to them.”
Also remember the spelling:
THEIR
not
THIER
The e comes before the i.
Expert Tips to Avoid the Thier Mistake
- Slow down when typing.
The mistake often happens because the letters are reversed quickly. - Remember the phrase “their things.”
Both words begin with the. - Use spell-check.
Most modern writing tools will identify thier as a spelling error. - Learn their, there, and they’re together.
Comparing them makes their differences easier to remember. - Read your writing aloud.
Their and there sound similar, so check the meaning rather than the sound. - Practice with short sentences.
Repeated exposure makes the spelling automatic.
Related Searches People Also Ask
Is “thier” a word?
No. Thier is a common misspelling of their.
How do you spell their correctly?
The correct spelling is their: T-H-E-I-R.
What does their mean?
Their shows possession or connection with one or more people.
Is their and there the same?
No. Their shows possession, while there usually refers to a place.
Is their and they’re the same?
No. They’re is a contraction of they are.
Why do people spell their as thier?
The letters i and e are easy to reverse, especially when typing quickly.
FAQs About Their or Thier
Is “their” correct spelling?
Yes. Their is the standard and correct spelling.
Is “thier” ever correct?
No. Thier is not the standard spelling of an English word meaning possession.
What is the meaning of their?
Their means belonging to or connected with them.
How do you pronounce their?
Their is usually pronounced like “thair.”
What is an example of their?
“The children packed their bags.”
What is the difference between their and there?
Their shows possession. There commonly refers to a place.
What is the difference between their and they’re?
Their shows possession, while they’re means they are.
Is their used in formal writing?
Yes. Their is completely appropriate in formal, academic, and professional writing.
Can their refer to one person?
Yes. Singular they can use their when referring to one person.
Example:
Every applicant should bring their identification.
How can I remember the spelling of their?
Remember: their = belonging to them, and spell it T-H-E-I-R.
Final Verdict
Their is the correct spelling.
Thier is a common spelling mistake caused by switching the e and i.
The easiest rule is:
Their = belongs to them
There = a place
They’re = they are
Conclusion
The confusion between their or thier is completely understandable, but the answer is simple.
Always use their when you want to show possession or a connection with someone.
For example:
They love their new home.
Never write thier when you mean their. It is simply a misspelling.
The best memory trick is to think “their things belong to them.” Once you connect their with possession, the correct spelling becomes much easier to remember.
Camila Green is an English language writer who specializes in confusing word comparisons and spelling explanations. She creates simple, beginner-friendly guides on topics like “niece or neice” and other common English mistakes. Her writing focuses on clarity, real-life examples, and easy learning. At VerrsaPick, she helps readers improve their English with practical and engaging content.
