Thier or Their: Which Spelling Is Correct?

Their is the correct spelling. Thier is a common spelling mistake and is not accepted as a standard English word.

Their is a possessive determiner that shows something belongs to or is connected with people, animals, or things. For example, “Their house is near the school” shows that the house belongs to them.

Many people misspell their because the letters appear in an unusual order. The correct spelling places the e before the i.

Quick Answer: Thier or Their?

Their: Correct spelling. It shows possession or association.

Thier: Incorrect spelling. It is a common typing and spelling error.

Correct: Their children attend the same school.

Incorrect: Thier children attend the same school.

Remember this simple rule: Write their, not thier.

Quick Facts: Their vs. Thier

Feature	Their	Thier
Spelling status	Correct	Incorrect
Part of speech	Possessive determiner	Not a standard English word
Meaning	Belonging to them	No standard meaning
Pronunciation	/ðer/ or /ðɛr/	No standard pronunciation
Usage	Standard English	Spelling mistake
Example	Their car is new.	Thier car is new.
Regional difference	Used in American and British English	Not a regional alternative

What Does Their Mean?

Their is a possessive determiner in English. It shows that something belongs to, relates to, or is associated with more than one person.

It usually comes before a noun.

Examples:

Their house has a beautiful garden.

The students forgot their homework.

Their parents arrived early.

We visited their new restaurant.

The workers completed their tasks.

In each sentence, their connects something with a person or group.

Their as a Possessive Determiner

A possessive determiner identifies ownership or association. It appears before a noun and tells readers who something belongs to.

Consider these examples:

Their books are on the table.

Their decision surprised everyone.

Their company opened a new office.

Their dog enjoys playing outside.

The word their does not usually stand alone before a complete noun phrase. It needs a noun or another word that introduces one.

For example:

Their house is large.

Their new house is large.

Their beautiful garden needs attention.

Here, their identifies the owner of the house or garden.

Can Their Refer to One Person?

Yes. Their can refer to one person when the person’s gender is unknown, irrelevant, or when they use they/them pronouns.

This usage is called singular they.

Examples:

Someone left their umbrella in the office.

Every student should bring their notebook.

The doctor said their appointment was confirmed.

Alex forgot their phone at home.

In these sentences, their refers to one person rather than a group.

Singular their is widely accepted in modern English. It is useful when you do not know someone’s gender or want to avoid identifying it.

Their in Everyday Conversations

People use their in speaking and writing to discuss ownership, relationships, responsibilities, and personal information.

Examples:

They invited us to their wedding.

My neighbors sold their old car.

The children cleaned their room.

Everyone should respect their teachers.

The company changed their working hours.

The meaning remains connected to a person or group, even when the sentence structure changes.

What Does Thier Mean?

Thier is not a standard English spelling. It is usually a typing error or spelling mistake made when writing their.

It does not have an accepted dictionary meaning in standard English.

For example:

Incorrect: Thier parents live nearby.

Correct: Their parents live nearby.

The mistake happens because people sometimes place the letters i and e in the wrong order.

Why Do People Write Thier Instead of Their?

There are several common reasons:

Letter confusion: People accidentally type i before e.

Typing speed: Fast typing can cause spelling errors.

Visual similarity: The two spellings look almost identical.

Limited proofreading: Writers may overlook the reversed letters.

Memory mistakes: Some learners remember the sound but not the exact spelling.

Although the mistake is understandable, standard written English requires their.

Their vs. Thier: Key Differences

The main difference is that their is a correct English word, while thier is a misspelling.

Comparison	Their	Thier
Correct spelling	Yes	No
Grammatical function	Possessive determiner	None in standard English
Shows ownership	Yes	No
Used before nouns	Yes	No
Accepted in formal writing	Yes	No
Used in academic writing	Yes	No
Example	Their school is nearby.	Thier school is nearby.

There is no difference in meaning because thier does not have a standard meaning.

The correct choice is always their when you intend to express possession or association.

Their, There, and They’re: Understanding the Difference

Many English learners confuse their with two other words: there and they’re.

These words sound similar, but their meanings and grammatical functions differ.

1. Their: Shows Possession

Their indicates that something belongs to or relates to someone.

Examples:

Their children are playing outside.

I borrowed their laptop.

Their house needs renovation.

2. There: Refers to a Place or Introduces Something

There can refer to a location or help introduce a statement.

Examples:

Your shoes are over there.

There is a book on the desk.

We went there last weekend.

When there refers to a place, it answers the question “Where?”

3. They’re: Short for They Are

They’re is a contraction of the two words they are.

Examples:

They’re waiting for the bus.

They’re happy with the results.

They’re planning a family trip.

You can check whether they’re is correct by replacing it with they are.

For example:

“They’re waiting outside.”

“They are waiting outside.”

Both sentences make sense.

Their vs. There vs. They’re: Comparison Table

Word	Meaning	Example
Their	Belonging to them	Their house is beautiful.
There	A place or introductory word	The keys are there.
They’re	They are	They’re ready to leave.
Thier	Incorrect spelling	Thier house is beautiful.

How to Choose the Correct Word

Use this simple test before writing:

If you mean ownership, use their.

If you mean a place, use there.

If you mean they are, use they’re.

If you write thier, correct the spelling to their.

For example:

“They’re taking their bags over there.”

This sentence uses all three correct words.

They’re = They are.

Their = Belonging to them.

There = A location.

Their in Sentences: 20 Examples

The following examples demonstrate how to use their correctly in everyday English.

Their house is located near the park.

The children packed their school bags.

Their parents arrived before dinner.

Everyone should bring their identification.

The students completed their assignments.

Their new business is growing quickly.

We visited their family last weekend.

The employees received their monthly salaries.

Their dog sleeps near the front door.

The players celebrated their victory.

Someone forgot their jacket in the classroom.

Their garden looks beautiful in spring.

The neighbors painted their house yesterday.

Each student must submit their application.

Their opinions were different from ours.

The children shared their toys with friends.

The company announced their latest project.

Their wedding will take place next month.

My friends invited us to their dinner party.

The teachers prepared their lessons carefully.

These examples show that their can refer to groups or individual people through singular they.

Common Mistakes When Using Their

Spelling mistakes involving their often happen because of similar-looking words or incorrect letter order.

Understanding these mistakes can improve your writing.

Mistake 1: Writing Thier Instead of Their

This is the exact spelling problem behind the keyword.

Incorrect: Thier family lives in New York.

Correct: Their family lives in New York.

The correct spelling places e before i.

Mistake 2: Confusing Their With There

Their shows possession, while there can indicate a place.

Incorrect: Their is a restaurant near my house.

Correct: There is a restaurant near my house.

However:

Correct: Their restaurant is near my house.

The correct choice depends on the sentence’s meaning.

Mistake 3: Using Their Instead of They’re

Their shows possession. They’re means they are.

Incorrect: Their going to school.

Correct: They’re going to school.

However:

Correct: Their children are going to school.

A useful trick is to replace they’re with they are. If the sentence still makes sense, they’re is probably correct.

Mistake 4: Using Thier in Formal Writing

The misspelling may appear in casual messages, comments, or social media posts. However, it should not appear in professional documents.

Incorrect: Please send thier documents before Friday.

Correct: Please send their documents before Friday.

Always proofread important writing to catch this type of error.

How to Remember the Correct Spelling of Their

Remembering their becomes easier when you use a simple spelling technique.

1. Remember “E Before I”

The correct spelling is T-H-E-I-R.

The letters e and i appear in this order:

THEIR

Do not reverse them into T-H-I-E-R.

Although “i before e” is a familiar English spelling guideline, it has exceptions. It does not apply to every English word.

For their, simply remember the exact letter sequence.

2. Connect Their With Ownership

Think of their as a word that shows ownership.

Examples:

Their house.

Their car.

Their family.

Their responsibilities.

When discussing something that belongs to people, remember their.

3. Memorize a Simple Sentence

Use this sentence to remember the spelling:

Their things are important to them.

Notice that their contains the letters e before i.

Repeating this sentence can help reinforce the correct spelling.

4. Use a Spelling Check

If you frequently type thier, use a spelling checker.

Most modern word processors identify this spelling as an error and suggest their.

However, always review the suggestion. Spell-checking tools may not identify every contextual mistake involving their, there, and they’re.

Frequently Asked Questions

Is Thier a Correct English Word?

No. Thier is not a standard English word. It is a common misspelling of their. The correct spelling is T-H-E-I-R, which shows ownership or association.

Is It Their or Thier?

Their is the correct spelling. Thier is incorrect in standard English. For example, write “Their house is beautiful,” not “Thier house is beautiful.”

Why Is Their Spelled With E Before I?

Their follows the spelling pattern T-H-E-I-R. The letters e and i appear in that order. Remembering the exact spelling helps prevent the common mistake of reversing these letters.

Is Their Singular or Plural?

Their can be both singular and plural. Traditionally, it refers to something belonging to multiple people. Modern English also uses singular their when referring to one person.

Examples:

Their parents are teachers. (Plural)

Someone forgot their phone. (Singular)

What Is the Difference Between Their and They’re?

Their shows possession, while they’re is a contraction of they are.

Examples:

Their car is expensive.

They’re buying a new car.

You can replace they’re with they are to check whether the contraction fits.

Can I Use Their in Formal Writing?

Yes. Their is completely acceptable in formal, academic, professional, and everyday writing. It is also appropriate when using singular they to refer to someone whose gender is unknown or unspecified.

Conclusion

Their is the correct spelling, while thier is a common spelling mistake.

Use their when showing ownership or association. It can refer to multiple people or one person through singular they.

Remember the correct letter order: T-H-E-I-R. Keep the e before the i, and avoid reversing them.

Understanding the difference between their, there, and they’re will also help you write more accurately.