Their vs There vs They're: The Difference Explained Once and for All

Their, there and they're sound exactly the same, and that is the whole problem. When you speak, the confusion never shows. It only appears in writing, which is why this mix-up is one of the most common spelling errors people make, from first emails to university essays and the official documents covered in our guide to CEFR levels in visa applications. A spell-checker will not save you either, because all three are correctly spelled words. It just picks the wrong one.

The good news is that these three words do completely different jobs, and once you can name the job, the choice becomes automatic. This guide separates them by function, gives you a substitution test for each, and finishes with a short check so you can see whether the rule has stuck.

Their shows possession

Their means belonging to them. It always sits in front of a noun, because it is telling you who owns that noun.

• They packed their bags the night before.
• The students handed in their essays.
• My neighbours painted their front door red.

The test: if you can replace the word with our, your or my and the sentence still makes grammatical sense, you need their. "They packed our bags" has the same shape, so their is correct.

There shows place, or introduces a fact

There has two uses, but they are related. First, it points to a place, the opposite of here. Second, it introduces the existence of something, in phrases like there is and there are.

• Put the box over there.
• We are going there next week.
• There is a problem with the booking.
• There are three options left.

The test: there contains the word here, and both are about location. If your sentence is about where something is, or about something existing, you want there.

They're is they are, always

They're is a contraction. The apostrophe stands in for the missing letter a in are. If you cannot expand it back into they are, it is wrong.

• They're waiting outside. (they are waiting)
• I think they're Italian. (they are Italian)
• They're going to be late. (they are going to be late)

The test is the strongest of the three: read the sentence with they are in place of they're. If it still works, the contraction is right. "They are waiting outside" is fine, so they're is correct. If it sounds broken, you wanted their or there instead.

Putting the three tests together

Here is the whole system in one place. When you reach one of these words, run the tests in this order:

1. Can you expand it to they are? Write they're.
2. Is it about a place, or does it say something exists? Write there.
3. Does it own the next word? Write their.

Try it on this sentence, which uses all three: "They're going to leave their coats over there." Expand the first to they are, check that coats belong to them, and confirm that the last word points to a place. Every one checks out.

A short practice check

Fill the gap in each sentence, then run the test to confirm.

1. ___ house is the one with the blue gate.
2. I heard ___ moving to Spain next year.
3. Is ___ any milk left in the fridge?
4. The children left ___ shoes by the door, and now ___ looking for them over ___.

Answers: 1. Their (the house belongs to them). 2. they're (they are moving). 3. there (something existing). 4. their, they're, there.

If those felt automatic, the rule has stuck. If the last one made you pause, it is worth writing out five of your own sentences using all three, because production fixes the pattern faster than reading does. Homophones like these are one family of common mix-ups; usage pairs such as less vs fewer and farther vs further are another, and both kinds are among the first distinctions learners meet. Getting them automatic early pays off, and a quick English level test will confirm they are no longer quietly costing you marks.