Have you ever sent a message and later noticed a simple spelling mistake? It happens more often than you think. A tiny mix-up can make an otherwise clear sentence look wrong. Some spelling errors happen because we type too fast or trust our memory. The tricky part is that these mistakes can slip past us, even when we know the word well. Luckily, fixing them is easier than you might expect.
One common mix-up is writing thier instead of their. Just two letters are out of order, but only one spelling is correct in standard English. The word their shows ownership, as in Their house is near the school. You may see this mistake in school assignments, work emails, text messages, and social media posts. Don’t worry if you’ve made it yourself. This guide explains the correct spelling, shows useful examples, and shares simple tricks to help you remember it.
Examples of Correct Usage
Using their correctly is easy once you understand possession and ownership. This word shows that something belongs to a person, group, organization, or animal.
Remember, thier is a common spelling mistake. The correct spelling is always their in standard English.
You can use their in school assignments, emails, business writing, and everyday conversations. It usually appears before a noun, such as house, ideas, or books.
Here are three common situations where you can use their correctly:
- Possession: Showing who owns something.
- Organizations: Describing something associated with a company or group.
- Animals: Identifying body parts or belongings associated with animals.
Learning these examples will improve your writing accuracy and help you avoid common spelling errors.
Possession
The main purpose of their is to show possession or ownership. It works as a possessive determiner and usually comes before a noun.
For example, you can write their house, their car, or their favorite book. These phrases tell readers who owns or uses something.
Here are some correct examples:
- Their house has a beautiful garden.
- The students forgot their homework.
- My friends brought their cameras.
- The children cleaned their room.
Conversation example:
Alex: Whose jackets are these?
Mia: They’re their jackets. They left them here.
Remember that their differs from theirs. You say their jackets but the jackets are theirs. Both forms express ownership, but they follow different grammar patterns.
Organizations
You can also use their when discussing companies, schools, teams, and other organizations. The word often refers to the people associated with these groups or to something belonging to them.
For example, a company might update its policies, or its employees might change their schedules. Your choice depends on what the sentence emphasizes.
Consider these examples:
- The employees submitted their reports.
- The students celebrated their school’s success.
- The players wore their team uniforms.
- The managers discussed their plans.
Conversation example:
Sam: Did the company announce its new policies?
Lily: Yes, their website has all the details.
In American English, an organization often takes it or its when treated as a single unit. However, they and their can refer to the people within that organization. Choose the form that fits your intended meaning.
Animals
The word their can describe things that belong to animals or are associated with them. You can use it for pets, wild animals, birds, and groups of creatures.
This usage follows the same possession rule as human examples. The word identifies whose body parts, nests, food, or belongings you’re describing.
Here are some examples:
- The dogs wagged their tails.
- The birds built their nests.
- The cats cleaned their paws.
- The horses returned to their stable.
Conversation example:
Noah: Where are the birds?
Emma: They’re near their nests in the trees.
You can also use their for a single animal when its sex is unknown or irrelevant. For example, The fox returned to their den may suit a gender-neutral context, though its den is also common for animals.
Examples of Incorrect Usage
Spelling mistakes can slip into your writing when you type quickly or overlook a small detail. One common error is writing thier instead of their.
Although the two spellings look similar, only their is correct in standard English. The letters e and i appear in the wrong order in thier.
You might make this mistake in school assignments, emails, text messages, social media captions, or work documents. A spell checker may catch it, but proofreading is still important.
Compare incorrect sentences with their corrected versions below. These examples will help you recognize the error and remember the correct spelling.
Incorrect
The following sentences contain spelling or word-choice mistakes. Notice how each error affects writing accuracy.
- Thier house is near the park.
- I borrowed thier laptop yesterday.
- The students forgot thier books.
- Thier dog loves playing outside.
The spelling thier is a transposition error because the letters i and e appear in the wrong order.
Writers sometimes make similar mistakes with words such as recieve, freind, beleive, and acheive. The correct spellings are receive, friend, believe, and achieve.
Conversation example:
Mia: I think I spelled their wrong in my email.
Jake: Check the letters. You wrote thier instead of their.
A quick review can catch this common spelling error before you share your writing.
Correct
Correcting thier is simple: switch the letters into the proper order to spell their. Then check whether the sentence uses the word to show possession.
Here are the corrected versions:
– Incorrect: Thier house is near the park. Correct: Their house is near the park.
– Incorrect: I borrowed thier laptop yesterday. Correct: I borrowed their laptop yesterday.
– Incorrect: The students forgot thier books. Correct: The students forgot their books.
– Incorrect: Thier dog loves playing outside. Correct: Their dog loves playing outside.
Quick memory trick: Remember the ei in their. You can also connect their with heir, a person who inherits something.
Before submitting essays, emails, or blog posts, proofread your work and use a spell checker. These small habits support polished writing, professionalism, and clear communication.
Their in Academic Writing
In academic writing, their shows possession or ownership. It connects a person or group to something that belongs to them. You can use it in essays, research papers, school assignments, and reports.
The spelling thier is incorrect in standard English. Always write their to keep your work clear and polished.
Examples:
- Students should submit their assignments before the deadline.
- Researchers shared their findings with the class.
- Each student must bring their own notebook.
- Teachers explained their expectations for the project.
Conversation example:
Liam: Have you finished your essay?
Emma: Yes, I checked my sources and corrected their titles.
Quick tip: Proofread your work before submitting it. A spell checker can catch thier, but you should also review your sentences for grammar and meaning.
Their in Professional Communication
Professional communication requires clear and accurate writing. You may use their in business emails, reports, presentations, and workplace messages. It helps show who owns something or who is responsible for an action.
Writing thier instead of their can make a message look less polished. Although one typo rarely changes your entire message, proofreading shows attention to detail.
Examples:
- Employees must complete their training this week.
- Managers shared their plans during the meeting.
- Clients received their updated invoices.
- Team members submitted their reports on time.
Conversation example:
Olivia: Did the clients receive their documents?
Noah: Yes, their documents were sent this morning.
Quick tips:
- Use their before a noun, such as their project.
- Check spelling before sending important emails.
- Use a spell checker to catch typing errors.
- Read your message once before clicking Send.
Common Sentences Using Their
The easiest way to learn their is to see it in everyday sentences. It usually appears before a noun and shows that something belongs to a person, group, or organization.
Remember that their is correct, while thier is a common spelling mistake. The two words contain the same letters, but the letters i and e appear in the wrong order in the misspelling.
Common examples:
- Their house is near the school.
- The children packed their lunch.
- My friends forgot their tickets.
- The players celebrated their victory.
- The company announced their new plans.
- The birds returned to their nests.
- Everyone should bring their own water.
- The students finished their homework.
Conversation example:
Mia: Where are the neighbors?
Jack: They’re cleaning their garden.
Here, they’re means they are, while their shows ownership.
Remember: In the sentence Their house is over there and they’re happy, each word has a different meaning.
Practice Exercise
Ready to test your spelling? Fill in each blank with their or thier. Choose the correct spelling based on standard English.
Every sentence below uses a situation you might encounter at school, home, or work. Pay attention to the letter order. The correct word is always spelled their when you need to show possession.
Questions
Complete each sentence with the correct spelling.
- The students left _____ books in the classroom.
- _____ dog enjoys running in the park.
- The workers finished _____ tasks early.
- My friends invited us to _____ house.
- The birds built _____ nests in the trees.
- The team celebrated _____ important win.
- The children packed _____ bags for the trip.
- The company updated _____ website yesterday.
Answers
Check your answers below. Each blank requires their, not thier.
- The students left their books in the classroom.
- Their dog enjoys running in the park.
- The workers finished their tasks early.
- My friends invited us to their house.
- The birds built their nests in the trees.
- The team celebrated their important win.
- The children packed their bags for the trip.
- The company updated their website yesterday.
Quick reminder: Think of the phrase their belongings to help remember the correct letter order. You can also use a spell checker, but learning the correct spelling helps you write with confidence.
Mini Quiz
Take this short quiz to check your understanding of their vs thier. Read each question carefully and select the best answer. The questions cover spelling, meaning, and correct usage.
1. Which spelling is correct?
Thier
Their
Theer
2. Which sentence is correct?
Thier car is outside.
Their car is outside.
There car is outside.
3. What does their usually express?
A place
A contraction
Possession or ownership
4. Which word means they are?
Their
There
They’re
5. Which sentence uses their correctly?
The kids forgot their bags.
The kids forgot thier bags.
The kids forgot they’re bags.
Check answers
Answer all five questions to see your score.
Final tip: Remember that their is the correct spelling. Avoid thier in school assignments, professional emails, text messages, and social media posts.
FAQs
1. Is thier ever the correct spelling?
No, thier is always a misspelling in standard English. The correct spelling is their, which shows possession or ownership.
2. What does their mean?
Their shows that something belongs to a person or group. For example, Their house is beautiful and close to school.
3. Why do people confuse their and thier?
People often type quickly or mix up letter order when writing. This simple spelling mistake can happen to anyone, even experienced writers.
4. How can I remember the correct spelling of their?
Remember the letter order in their, not thier. Connect their with heir to help you recall the correct spelling.
5. Can using thier affect my writing?
Yes, thier can make writing look less polished and professional. Proofread your work to catch spelling mistakes before sharing it.
Conclusion
Spelling mistakes can happen to anyone, especially when typing quickly. However, learning the correct spelling can help you write with confidence. Remember that thier is incorrect in standard English. The correct word is their, which shows possession or ownership. For example, you can write, Their friends arrived early. A simple check can help you avoid this common mistake in school assignments, emails, and social media posts.
Whenever you write, take a moment to check your spelling. If you see thier, change it to their. Try reading your sentences aloud and using a spell checker when needed. You can also practice writing simple sentences to remember the correct letter order. Although thier may look right at first, only their is the correct spelling. Keep these tips in mind, and you’ll make fewer spelling errors. With regular practice, your writing will become clearer, more accurate, and more professional.
Muaz is a language enthusiast and content writer at Businessleam, creating clear, helpful articles about words, meanings, grammar, phrases, and modern English.
