How to Say Thank You in Korean (+ 3 Polite Phrases You'll Use Every Day)

If you've watched any K-drama, you've heard "감사합니다" (gamsahamnida) at least a hundred times. It means "thank you" — and it's the safest, most polite version you can use anywhere in Korea.

But here's what nobody tells beginners: there are three other phrases you'll need just as often. Together, these four polite phrases cover about 80% of the small-talk situations you'll be in — ordering coffee, apologizing for bumping into someone, telling a taxi driver you don't know the address, agreeing with a host at dinner.

This guide covers all four: 알아요, 몰라요, 죄송합니다, 감사합니다. By the end, you'll know what each means, when to use it, and the social tone behind it — the part Google Translate can't teach you.

The 4 Polite Phrases Every Beginner Needs

Phrase	Hangul	Romanization	Meaning	Formality
I know	알아요	arayo	"I know" / "I understand"	Polite informal
I don't know	몰라요	mollayo	"I don't know" / "I'm not sure"	Polite informal
I'm sorry	죄송합니다	joesonghamnida	"I'm sorry" / "I apologize"	Formal polite
Thank you	감사합니다	gamsahamnida	"Thank you"	Formal polite

Notice the pattern: the first two end in -요 (polite informal — used with friends, casual situations), and the second two end in -합니다 (formal polite — used with strangers, elders, customer service). You don't need to memorize the grammar yet. Just know that length usually equals formality in Korean.

1. 알아요 (arayo) — "I know"

Use 알아요 when you want to confirm that you understand or already have the information. It's the most common way to say "got it" in a conversation.

• K-drama scene: The protagonist's friend explains a plan in detail. The protagonist nods: "알아요." (Got it. I understand.)
• Real life: A Korean friend asks if you remember the meeting location. You reply: "알아요." (I know it.)
• Tone: Friendly, light, conversational. Don't say it sharply — that turns it into "yeah yeah, I KNOW" (impatient).

Pronunciation tip: "ah-RAH-yo" — flat tone, no stress on any one syllable. The "ㄹ" sound is a soft tap, between English "r" and "l."

2. 몰라요 (mollayo) — "I don't know"

The opposite of 알아요. Use 몰라요 when you genuinely don't know something, or as a soft way to deflect a question you don't want to answer.

• K-drama scene: Detective asks the suspect where she was last night. She looks away: "몰라요." (I don't know. / I don't remember.)
• Real life: A taxi driver asks if you know the destination's exact address. You reply: "몰라요. GPS 주소 보여드릴게요." (I don't know — I'll show you the GPS address.)
• Tone: Neutral, sometimes apologetic. Drag the "MOL" slightly for emphasis ("MOL-la-yo") to convey "I really have no idea."

Cultural note: Koreans often use 몰라요 even when they partially know something, as a polite way to avoid being wrong. It's softer than saying "no" directly — see our guide on saying no in Korean for the full picture.

3. 죄송합니다 (joesonghamnida) — "I'm sorry"

The formal apology. Use 죄송합니다 when you bump into someone, arrive late, made a mistake at work, or apologize to a stranger. It carries genuine weight — Koreans don't toss "sorry" around the way Americans do.

• K-drama scene: A junior employee enters the boss's office late. Head down, both hands by his sides: "죄송합니다." (I sincerely apologize.)
• Real life: You step on someone's foot on the subway. You bow slightly: "죄송합니다." (Sorry — apologetic, not casual.)
• Tone: Sincere. Said with a small bow, eyes down or briefly meeting the other person's. Never said laughing.

When NOT to use it: If you bump into a close friend or family member, 미안해 (mianhae, casual sorry) is more natural. 죄송합니다 with a close friend can feel cold — like you're putting formal distance between you.

Pronunciation tip: "JWE-song-HAM-ni-da" — five syllables. The "JWE" at the start is the trickiest part for English speakers. It's not "joy"; it's a sharp "jweh" sound.

4. 감사합니다 (gamsahamnida) — "Thank you"

The phrase you came for. 감사합니다 is the safest, most respectful way to say thank you in Korean — works in 90% of situations, from a barista handing you coffee to a job interviewer wrapping up the meeting.

• K-drama scene: The protagonist receives a gift from a senior colleague. Slight bow, both hands receiving: "감사합니다." (Thank you, sincerely.)
• Real life: The cashier hands you your change at a convenience store. You smile: "감사합니다." (Thanks.)
• Tone: Warm but composed. Said with a small head nod or bow — not a wave or a thumbs-up.

The casual version: 고마워요 (gomawoyo) is the polite informal version, used with friends or people roughly your age. 고마워 (gomawo) is the casual "thanks" — friends only. As a beginner, default to 감사합니다 and you'll never offend anyone.

Pronunciation tip: "GAM-sa-HAM-ni-da" — five syllables, slight emphasis on "GAM" and "HAM." The "ㅂ" in "합니다" is a soft "p"/"b" hybrid — closer to "ham-nee-da" than "hap-nee-da."

Putting It All Together — A Mini Conversation

Imagine you've just arrived at a Korean café for the first time. Here's how all four phrases play out in a single interaction:

Situation	What you say	What it means
Barista asks if you've decided	아직 몰라요	"I don't know yet" (still deciding)
You bump into another customer	죄송합니다	"I'm sorry"
Barista explains a menu item	알아요	"I got it / I understand"
Barista hands you your drink	감사합니다	"Thank you"

Four phrases. One full coffee-shop interaction handled. This is the kind of fluency that compounds — once these four feel natural, the next four (yes, no, please, excuse me) are easy to layer on top.

Why This Matters for K-Drama Fans

If you've been watching K-dramas with subtitles, you've heard all four phrases hundreds of times — you just may not have noticed the pattern. Try this on your next episode: count how many times you hear 감사합니다 in a single episode. The answer is usually somewhere between 8 and 15.

That density is why beginners who learn these four phrases first feel like they "unlock" K-dramas. You stop relying on subtitles for the easy lines, which frees up attention for the harder vocabulary and grammar around them.

Common Beginner Mistakes

1. Saying 감사 alone. "감사" by itself isn't really a sentence — Koreans always add 합니다 or 해요. Think of it like saying "Thank" instead of "Thanks" in English.
2. Using 죄송합니다 with close friends. Sounds cold. Use 미안해 instead.
3. Confusing 알아요 with 알겠어요. Both mean roughly "I understand" — but 알겠어요 (algesseoyo) is more formal and used when you're agreeing to do something the speaker just asked. Stick with 알아요 as a beginner; you'll learn the nuance later.
4. Bowing too deeply. A small head nod (~15°) is plenty for everyday 감사합니다 / 죄송합니다. A 45° bow is reserved for formal apologies and respect for elders.

What to Learn Next

Once these four feel automatic, layer on:

• Greetings: 안녕하세요 (annyeonghaseyo, "hello") — see our Hi in Korean guide.
• Yes / No: 네 (ne) / 아니요 (aniyo) — covered in No in Korean.
• Sentence-building: Learn how 은/는, 이/가, 을/를 connect words into real sentences — our Korean Particles guide walks you through it.

The big picture: Korean rewards beginners who learn high-frequency phrases before grammar. Get these four reflexive, then add greetings, then add basic sentence patterns. Within a month you'll be ordering coffee, navigating a taxi, and recognizing far more K-drama lines without subtitles.

Practice with a Native Tutor

The phrases above are easy to read on a page and hard to say at conversational speed. The fastest fix: say them out loud with a native speaker who can correct your pronunciation and intonation in real time.

KTalk Live's free 25-minute trial class is built for beginners — your teacher will walk you through these four phrases (and a couple more) until your accent and timing feel natural. No textbook prep needed.