Thier or Their: Which Spelling Is Correct?

If you’re wondering about thier or their the correct spelling is their. The spelling thier is a common mistake and isn’t a standard English word. The confusion usually comes from switching the order of the letters i and e.

Their is one of the most common possessive words in English. You’ll see it in everyday speech and writing because it shows that something belongs to or is connected to more than one person. Once you understand how their works and why thier is wrong the difference becomes much easier to remember.

This guide explains the meaning of their the reason people misspell it common examples and the other words that often cause confusion. You’ll also see how their differs from there and they’re. Those three words sound alike but have completely different jobs in a sentence.

Quick Definition

Their is a possessive word used to show that something belongs to or is connected with two or more people. For example you could say Their house is across the street. Thier is an incorrect spelling and should not be used in standard English.

Direct Answer

Their is the correct spelling. Thier is always incorrect.

Comparison Table

Word or spelling	Meaning	Example sentence	When to use it
Their	Shows possession or connection	Their dog is very friendly.	Use it when something belongs to or is connected with people.
Thier	Incorrect spelling	Thier dog is very friendly.	Never use this spelling.
There	Refers to a place or introduces something	The books are over there.	Use it for location or in certain sentence structures.
They are	The full form behind they’re	They are ready to leave.	Use these words when you mean they are.
They’re	Short form of they are	They’re ready to leave.	Use it when they are fits the sentence.

Why People Spell Their Wrong

The spelling mistake happens because the letters i and e appear next to each other. Many English words contain these letters in different orders. That makes it easy to hesitate and put them in the wrong place.

When someone writes quickly the brain often fills in familiar words without checking every letter. If the writer has seen the incorrect form many times it can also begin to look familiar. That makes the error harder to notice during proofreading.

There is another reason this word causes trouble. Their sounds exactly like there and they’re in normal speech. You can’t hear the spelling difference. You have to use the meaning and grammar of the sentence to choose the right word.

For example consider these sentences.

• Their car is parked outside.
• The car is parked over there.
• They’re parked outside.

The first sentence shows possession. The second points to a place. The third uses a shortened form of they are. The pronunciation can sound almost identical but the meaning changes completely.

Learning the job each word performs is much more useful than trying to memorize the spellings separately.

What Their Means

Their is a possessive determiner. In simple terms it tells the reader that something belongs to or is connected with a group of people.

For example:

• Their house is near the school.
• The students finished their homework.
• The players celebrated their victory.
• My neighbors sold their car.
• The children packed their bags.

In each sentence their connects something with a group.

The house belongs to them. The homework belongs to the students. The victory belongs to the players. The car belongs to the neighbors. The bags belong to the children.

Their can also describe a relationship rather than direct ownership.

For example:

• The students thanked their teacher.
• The workers met with their manager.
• The children called their parents.
• The team changed their strategy.

A teacher doesn’t belong to the students. A manager doesn’t belong to the workers. Their simply shows the relationship between the people and the person or thing being mentioned.

Their Does Not Always Mean Ownership

This is a useful point because people sometimes think possessive words only describe things someone owns.

Their can show ownership but it can also show association connection or relationship.

Consider this sentence.

The students spoke to their teacher.

The teacher isn’t the property of the students. Their simply tells us which teacher the sentence refers to.

The same idea appears in sentences like these.

• The employees attended their meeting.
• The children visited their grandparents.
• The athletes thanked their coach.
• The customers shared their opinions.

In each example their connects a group of people with someone or something related to them.

That broad meaning makes their one of the most useful words in everyday English.

How To Remember The Spelling

The easiest way to remember the correct spelling is to focus on the word heir inside their.

Look at the letters.

t + heir = their

An heir is a person who may receive money property or another possession from someone who has died. The spelling of heir gives you the letter order you need for their.

This creates a simple memory trick.

Think their has heir inside it.

That helps you remember that the spelling is their and not thier.

Another useful trick is to say the word slowly in your head while looking at it. The sound won’t tell you the answer but repeated exposure to the correct visual pattern can make the spelling stick.

You can also connect their with other words from the same family.

• Their.
• Theirs.
• Themselves.
• Them.
• They.

These words all relate to the pronoun they.

Their And Theirs

• Their and theirs are closely related but they don’t work in exactly the same way.
• Their usually comes before a noun.
• Their house is beautiful.
• I like their idea.
• We met their parents.
• Theirs usually stands alone and replaces a noun phrase.
• That house is theirs.
• The idea was theirs.
• The decision was theirs.
• You wouldn’t normally say That house is their. The sentence needs theirs because the possessive word stands on its own.
• A simple pattern can help.
• Their + noun
• Theirs + no noun
• Compare these examples.
• Their car is new.
• The car is theirs.
• Their dog is friendly.
• The dog is theirs.
• Once you see this pattern a few times the difference becomes much easier.

Their And There

• This is one of the biggest spelling and grammar confusions in English. The words sound the same but their meanings are completely different.
• Their shows possession or connection.
• Their house is large.
• There usually refers to a place.
• The house is over there.
• There can also be used to introduce a statement.
• There is a problem with the computer.
• There are three people waiting outside.
• A useful memory trick is to connect there with here because both can refer to places.
• Here means a place close to the speaker.
• There usually refers to another place.
• Their does not describe a location. It shows a connection or possession.
• Compare these sentences.
• Their books are on the table.
• The books are over there.
• The first sentence tells you who the books belong to. The second tells you where the books are.

Real Examples Of Their In Sentences

The best way to understand a word is to see how people actually use it.

Their At Home

• The children put their toys away before dinner.
• Here their tells us that the toys belong to the children.
• My neighbors painted their front door blue.
• The door belongs to the neighbors or is connected with their home.
• The guests left their coats by the entrance.
• Their identifies the people who own the coats.

Their At School

• The students opened their books.
• The books belong to or were given to the students.
• The teachers discussed their plans for the new semester.
• Their connects the plans with the teachers.
• The children finished their projects on Friday.
• The projects are connected with the children.

At The Workplace

• The employees returned to their desks after lunch.
• Their identifies the desks associated with the employees.
• The managers reviewed their reports.
• The reports belong to or were prepared by the managers.
• The company asked its workers to share their ideas.
• Their refers to the workers and connects them with their ideas.

Their In Everyday Conversation

• Where did they park their car?
• I met your friends and talked to their parents.
• The neighbors invited us to their party.
• The players changed their uniforms after the game.
• These sentences show how naturally their appears in ordinary speech and writing.

Common Mistakes With Their

The most common mistake is writing thier instead of their. This is simply a letter order error.

Another common problem is choosing their when they’re is needed. The two words look similar but they have different functions.

Consider this sentence:

Their going to the movies tonight.

This is incorrect because the writer means they are going.

The correct sentence is:

They’re going to the movies tonight.

Now consider:

They’re car is parked outside.

This is incorrect because the writer is talking about a car that belongs to them.

The correct sentence is:

Their car is parked outside.

There is also a third mistake involving there.

Their is a problem with the printer.

This is incorrect because the sentence doesn’t show possession. It introduces the existence of a problem.

The correct sentence is:

There is a problem with the printer.

These three words cause so much trouble because they sound alike. Once you focus on their meaning instead of their sound the difference becomes much clearer.

A Simple Test For Their

• When you’re unsure which form to use ask yourself one question.
• Am I showing that something belongs to or is connected with them?
• If the answer is yes use their.
• They forgot their keys.
• The keys belong to them.
• The students met their teacher.
• The teacher is connected with the students.
• The workers finished their tasks.
• The tasks are connected with the workers.
• If you’re not showing possession or connection check the other two forms.
• If they are fits use they’re.
• If you’re pointing to a place or introducing something use there.
• This simple test covers most everyday cases.

Their In Formal Writing

Their is completely acceptable in formal writing. You can use it in essays reports business documents emails applications and academic work.

For example:

• The researchers presented their findings at the conference.
• The committee released their recommendations after the meeting.
• The applicants submitted their documents before the deadline.

There is nothing informal about their. It is a standard part of English grammar.

The important thing is choosing the correct word for the meaning you want.

Their With Singular They

Their can also be used when they refers to one person.

This may surprise some readers because they is often taught as a plural pronoun. In modern English singular they is widely used when a person’s gender isn’t known or when a person uses they as a pronoun.

For example:

• Someone left their phone on the table.
• The sentence refers to one person but the person’s identity isn’t known.
• You might also say:
• Alex forgot their jacket.
• If Alex uses they and their pronouns then their is the correct possessive form.
• This use is common in everyday English and is also accepted in major modern dictionaries and style guides.
• The key point is that their does not always mean several people. It can refer to one person in appropriate contexts.

Their With Indefinite Pronouns

Their often appears after words like someone anyone everyone and nobody.

For example:

• Everyone should bring their own lunch.
• Someone left their umbrella here.
• Nobody wants to lose their keys.

These sentences use their to avoid assigning a gender to an unknown person.

This form is especially common in modern English because it keeps sentences natural and concise.

Instead of writing:

Everyone should bring his or her own lunch.

many writers now use:

Everyone should bring their own lunch.

The second sentence is shorter and sounds more natural in everyday American English.

Why Thier Looks Almost Right

• The incorrect spelling looks believable because it contains all the correct letters. Nothing is missing. The only problem is their order.
• That kind of error is called a transposition. In simple terms it means two letters have changed places.
• You may make similar mistakes when typing quickly. Your brain knows the word but your fingers put the letters down in the wrong order.
• This is why proofreading can help. Don’t only look for words that seem completely wrong. Look for familiar words that look slightly strange.
• If you see thier on the page pause for a moment. The correct pattern is their.

How To Avoid The Mistake When Typing

If you often make this error start paying attention to the first four letters.

thei

Then add the final letter.

their

You can also create a small personal habit. Every time you type the word in an important document glance at the spelling before moving on.

You don’t need to do this forever. After enough correct exposure your brain will begin to recognize the word automatically.

Another useful habit is reading your work aloud. This won’t help you hear the difference between their there and they’re because they sound alike. However reading aloud can slow your pace and make visual errors easier to spot when you follow along on the screen.

Their In Questions

Their can appear naturally in questions just as it does in statements.

• Where are their keys?
• Did you see their new house?
• What happened to their dog?
• Have you met their parents?

In each example their appears before a noun. It tells us who the person or thing is connected with.

The same pattern works with many nouns.

• their car
• their job
• their family
• their school
• their plans
• their opinion
• their children
• their business

This makes their easy to recognize once you understand its basic role.

Their In Negative Sentences

• Their also works in negative sentences.
• They didn’t bring their tickets.
• The students haven’t finished their work.
• The players couldn’t find their coach.
• The customers didn’t receive their orders.

The word still shows possession or connection. The negative verb does not change its function.

This is useful to remember because some learners think possessive words change when the sentence becomes negative. They don’t.

Their In Past Present And Future Sentences

• Their doesn’t change based on tense.
• The verb changes but their stays the same.
• They lost their keys yesterday.
• They are looking for their keys now.
• They will replace their keys tomorrow.
• The time changes from past to present to future but the possessive word remains their.

This is another reason their is easy to use once you understand its job. You don’t need to change its form to match the tense of the sentence.

Their And Its

Their and its can both show possession but they refer to different kinds of subjects.

• Use their with they.
• The students finished their work.

Use its with a singular thing or organization when appropriate.

• The company changed its policy.
• The dog wagged its tail.

The choice depends on the subject.

Compare:

• The children packed their bags.
• The child packed his bag.
• The dog carried its toy.

These possessive forms help the reader understand who or what owns something or has a connection with it.

Their And Your

• Their refers to another person or group. Your refers to the person you are speaking to.
• Their house is on the corner.
• You are talking about another group.
• Your house is on the corner.
• You are speaking directly to someone about their house.
• The difference is simple once you identify who owns or is connected with the noun.

In Business English

Their appears frequently in workplace communication.

• Please ask the clients for their updated information.
• The employees submitted their reports before the deadline.
• The managers shared their feedback with the team.
• The customers received their confirmation emails.

Using the correct form matters in business writing because small errors can distract readers from the message. A spelling mistake may seem minor but several mistakes in a short email can make the writing look rushed.

A quick review before sending important messages is usually enough to catch them.

Their In Academic Writing

Students often use their in essays and research papers.

• The researchers compared their results with earlier studies.
• The authors explained their main argument clearly.
• The students supported their claims with evidence.

In academic writing their is completely normal. The word doesn’t make writing informal.

Students should pay particular attention to the difference between their there and they’re because these errors are easy to make and can stand out in polished work.

A Quick Memory Trick For Their There And They’re

• Think of the three words as having three different jobs.
• Their belongs with people.
• There points to a place or introduces something.
• They’re means they are.
• You can remember them with three simple questions.
• Who owns it?
• Use their.
• Where is it?
• Use there.
• Do you mean they are?
• Use they’re.

For example:

Their shoes are over there because they’re going hiking.

• The sentence uses all three words correctly.
• Their tells us who the shoes belong to.
• There tells us where the shoes are.
• They’re means they are.

Once you can separate those three jobs the spelling becomes much easier.

Practice Sentences

Try reading these sentences and notice the role of their in each one.

• The boys left their bikes outside.
• Their shows who the bikes belong to.
• The family sold their old house.
• Their connects the house with the family.
• The workers returned to their offices.
• Their shows the connection between the workers and offices.
• The students shared their notes.
• Their shows who the notes belong to.
• The players celebrated their win.
• Their connects the victory with the players.
• The neighbors invited us into their home.
• Their shows the relationship between the neighbors and the home.

The word doesn’t need a complicated explanation in any of these examples. It simply connects a noun with the people associated with it.

FAQs

Is thier or their correct?

Their is correct. Thier is a common spelling mistake caused by putting the i and e in the wrong order. Always use their in standard English writing.

Why is thier wrong?

Thier is not a standard English word. It contains the right letters but places them in the wrong order. The accepted spelling is their.

How can I remember the spelling?

A useful trick is to remember the word heir inside their. Think of it as t plus heir which gives you their.

What is the difference between their and they’re?

Their shows possession or connection. They’re is short for they are. If you can replace the word with they are and the sentence still makes sense then they’re is usually the right choice.

What is the difference between their and there?

Their shows possession or connection while there usually refers to a place or introduces something. In their house the word shows who the house is connected with. In over there it points to a location.

Can their refer to one person?

Yes. Their can be used with singular they. For example Someone forgot their phone refers to one unknown person. It can also refer to a person who uses they and their pronouns.

Is their a pronoun?

Their is commonly described as a possessive determiner when it comes before a noun. It is also sometimes called a possessive pronoun in general discussions of grammar. In simple terms it shows possession or connection.

Is their used in formal writing?

Yes. Their is standard English and works in formal and informal writing. You can use it in essays emails reports business documents and everyday messages.

Conclusion

If you came here looking for the answer to thier or their the answer is simple. Their is the correct spelling and thier is incorrect. The mistake happens when the i and e are placed in the wrong order.

The bigger challenge is often knowing the difference between their there and they’re. Remember the basic rule. Their shows possession or connection. There usually points to a place or introduces something. They’re means they are.

A simple memory trick can help you keep the spelling straight. Think of heir inside their. Then use the meaning of the sentence to choose between their there and they’re.

The next time you see the incorrect form thier in your draft stop and switch the letters. Write their. With a little practice the correct spelling will become second nature.

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Learn the correct spelling and meaning of their. See why thier is wrong and master the difference between their there and they’re.