감사합니다 (gamsahamnida) might be the first Korean word you ever learned. But say it to your Korean friend’s little sister and you’ll sound like a business meeting; say 고마워 (gomawo) to your professor and you’ll sound rude. And you’re probably mispronouncing the middle of the word.
Here’s the complete map of saying thank you in Korean — every level from deep formality to text-message casual, plus the pronunciation detail 90% of learners miss.
The Big Three (Learn These First)
| Korean | Romanization | When to use |
|---|---|---|
| 감사합니다 | gam-sa-ham-ni-da | Default polite. Strangers, staff, work, elders. Never wrong. |
| 고마워요 | go-ma-wo-yo | Polite but warm. Acquaintances, friendly colleagues. |
| 고마워 | go-ma-wo | Casual. Close friends, younger people only. |
If you remember one thing: 감사합니다 is always safe. Politeness in Korean errs upward.
The Pronunciation Trap in 감사합니다
Written: 감사합니다 (gam-sa-hap-ni-da). Spoken: [감사함니다] — gam-sa-ham-ni-da.
The ㅂ becomes [m] before ㄴ. This is nasalization, one of Korean’s six sound-change rules, and it’s why the most common word in your Korean vocabulary never sounds quite like its spelling. Same rule powers 입니다 → [임니다]. Master it once, and thousands of words self-correct. (Deep dive: nasalization explained.)
감사합니다 vs 고맙습니다: The Question Everyone Asks
Both are formal “thank you.” Both are correct everywhere.
- 감사합니다 — Sino-Korean root 감사 (感謝). Feels slightly more official; dominant in announcements, service settings, business email.
- 고맙습니다 — native Korean root 고맙다. Feels slightly warmer and more personal; some Koreans prefer it for heartfelt thanks.
Real answer: Koreans mix them freely. Pick 감사합니다 as your default and understand both.
All 10 Ways to Say Thank You
| Korean | Romanization | Politeness | Notes |
|---|---|---|---|
| 대단히 감사합니다 | daedanhi gamsahamnida | very formal | ”Thank you very much” — ceremonies, speeches |
| 정말 감사합니다 | jeongmal gamsahamnida | formal+ | “Truly thank you” — genuine gratitude |
| 감사합니다 | gamsahamnida | formal | the universal default |
| 고맙습니다 | gomapseumnida | formal | native-root equivalent |
| 감사해요 | gamsahaeyo | polite | softer, everyday |
| 고마워요 | gomawoyo | polite | warm, friendly |
| 정말 고마워 | jeongmal gomawo | casual | ”thanks so much” between friends |
| 고마워 | gomawo | casual | standard between friends |
| 땡큐 / ㄱㅅ | ttaengkyu / g-s | very casual | Konglish “thank you” / texting initials of 감사 |
| 잘 먹겠습니다 | jal meokgesseumnida | situational | ”thanks for the meal” — said before eating |
That ㄱㅅ in row nine is real — Koreans abbreviate 감사 to its initial consonants when texting. More of those in our Korean texting slang guide.
How to Respond to Thank You
Textbooks teach 천만에요 (cheonmaneyo) — real Koreans almost never say it. Use these:
| Korean | Romanization | Feel |
|---|---|---|
| 아니에요 | anieyo | ”oh, it’s nothing” — the everyday default |
| 별말씀을요 | byeolmalsseumeullyo | ”don’t mention it” — formal |
| 괜찮아요 | gwaenchanayo | ”no problem” |
| 네 | ne | a warm “sure” — quick interactions |
Body Language: The Bow
A slight head nod accompanies 감사합니다 naturally. Depth scales with formality: quick nod for a barista, 15° for everyday respect, deeper for serious gratitude. Watch any K-drama checkout scene and you’ll absorb it in minutes.
Situational Bonus Phrases
선물 감사합니다! — Thank you for the gift! 도와주셔서 감사합니다. — Thank you for helping me. (very useful pattern: verb + 주셔서 감사합니다) 와 주셔서 감사합니다. — Thank you for coming.
The ~주셔서 감사합니다 pattern (“thank you for ~ing”) upgrades you from tourist Korean to real Korean with one template.
Keep Building Your Phrase Foundation
Pair this with hi in Korean and nice to meet you and you’ve got the golden trio of first conversations. The full Korean phrases guide organizes them all by situation.
And when you’re ready to read 감사합니다 as one instant chunk instead of five slow syllables — that’s exactly what the Batchim app trains, 15 minutes a day.