Kòp-kun: the Thai thanks, and the ending that has to match you

Saying it so it sounds Thai

Two syllables. Kòp is low. The o here stands for a long "aw", like "corp" without the r, not the short o in "top". It ends with your lips closing on a p you never release. Kun is flat and level. Both start with a k that has a small puff of air behind it, like the k in "kite".

Then the ending. ครับ (kráp) is high and short, and in quick speech many men drop the r so it comes out close to "káp". ค่ะ (kâ) falls, the way a firm "yes" falls in English.

You will see the phrase written khop khun, kob kun, kap kun and korp koon. Treat all of them as rough sketches and press Listen above instead. If you want the full story of why one phrase has four spellings, our deep dive on kòp-kun kâ and who says which ending takes it apart sound by sound.

When "thanks" isn't enough

Add มาก (mâak), "very", between the thanks and your ending:

In conversation Thais often say mâak twice, ขอบคุณมาก ๆ (kòp-kun mâak mâak), which lands near "thanks so much". Use it for the stranger who walked you to the right pier, not for the waiter who brought a straw.

You will also hear ขอบคุณนะครับ (kòp-kun ná kráp) and ขอบคุณนะคะ (kòp-kun ná ká). The นะ (ná) adds warmth, a little like "thanks, really". Women, note the change: after ná, the ending rises to a high ká instead of the falling kâ.

Kòp-jai: the casual thanks you probably shouldn't use yet

ขอบใจ (kòp-jai) is a lighter thanks. Parents say it to children, a manager says it to a junior, and close friends of the same age toss it at each other. It points downward or sideways, never up.

That makes it risky for a visitor. Said to the older woman who runs your guesthouse, or to a stranger who just helped you, kòp-jai sounds like you are speaking to them as a junior. Keep it for friends your own age or younger, and only once they use it with you. Until then, kòp-kun plus your ending is correct with everyone, from a street vendor to a hotel manager.

At the other end, ขอบพระคุณ (kòp-prá-kun) is the deeply respectful form Thais use with parents, teachers and elders. You will see it in formal letters and business notices ("thank you for using our service") and hear it in speeches and announcements. You do not need to say it.

What comes back: mâi bpen rai

Thank someone for a favour and the most likely answer is ไม่เป็นไร (mâi bpen rai), with their ending on it. It means "no worries", "it's nothing" and "you're welcome" all at once. It is also the right answer when someone thanks you: mâi bpen rai kráp, or mâi bpen rai kâ.

The same phrase answers an apology and shrugs off a small mishap, so it may be the most useful two seconds of Thai you learn. At a hotel desk you might instead hear ด้วยความยินดี (dûai kwaam yin dee), "with pleasure", which is more formal and more scripted.

Often there is no spoken reply at all. A smile, or a soft kráp or kâ, closes the exchange. That is not coolness. Thai simply does not require a "you're welcome" the way English does.

Who thanks whom: shops, stalls and taxis

In Thailand, service staff do most of the thanking. You will hear kòp-kun kâ every time you pay at a 7-Eleven, and the customer ahead of you may answer with nothing more than a nod. Saying it yourself is never wrong. It just means you will thank more often than the Thais around you, which costs nothing.

The pattern flips with people close to you. In many Thai families and close friendships, people say kòp-kun to each other less than English speakers do, and constant thanks can feel a little formal. It varies a lot from family to family. On a first trip you will rarely be in that position, but it explains why your Thai friend looks amused when you thank them for passing the rice.

Adding a wai to your thanks

The ไหว้ (wâi), palms together with a small dip of the head, adds respect to a thank you. Use it when someone older than you has helped, when you say goodbye to a host, or when someone wais you first in a formal setting. For someone your own age, your thumbs sit near your chin. For someone older, raise them to the tip of your nose. Nobody expects a visitor to get the height exactly right.

You do not need a wai for routine service. When a server, a shop assistant or a child wais you, smile and nod, and say kòp-kun with your ending if they have done something for you. Visitors who wai everyone are well meant but easy to spot. A spoken thanks with a smile is the everyday version. For more on who wais first, see when the wai goes with sà-wàt-dee.

Slips visitors make with kòp-kun

1. Copying the ending you just heard. A female cashier says kòp-kun kâ, and a male visitor says it straight back. You will be understood, and nobody will correct you, which is why this one survives whole trips. Men say kráp. Always.
2. Dropping the ending with older people. A bare kòp-kun is fine between friends. With anyone older, or anyone in uniform, add kráp or kâ.
3. Using kòp-jai because it is shorter. It is the version for juniors and close friends. With strangers, stick to kòp-kun.
4. Reading kòp like "top". The o in kòp is a long "aw", and the final p is unreleased, with no puff of air. A short "o" and a popped p are what give a visitor away.
5. Saying "you're welcome" in English when thanked. Mâi bpen rai with your ending is shorter and gets a bigger smile.
6. Waiing the 7-Eleven clerk. Kind, slightly awkward. A nod with your thanks is the local habit.