“Happy Birthday” in Korean (+ How to Get the Politeness Level Right)

---

How do you say “happy birthday” in Korean? The short answer is 생일 축하해요 (saengil chukhahaeyo). The longer, more useful answer is that this is only one of at least four correct answers, and picking the wrong one can make you sound either oddly formal with a friend or a little rude to your girlfriend's grandmother.

Here's the thing about Korean that catches English speakers out. In English, “happy birthday” is “happy birthday” whether you're saying it to your five-year-old nephew or your boss. Korean doesn't let you off that easily. The language builds respect and closeness directly into its grammar, so the phrase you use has to shift depending on who's standing in front of you. Get it right and it's a small, genuine sign that you understand how the culture works.

In this guide I'll walk you through the main phrase and its breakdown, all four politeness levels and when to use each one, the Korean birthday song, a bank of related phrases, the traditions that go with a Korean birthday, and how to pronounce all of it.

Table of contents

• How to Say “Happy Birthday” in Korean
• Getting the Politeness Level Right: Four Ways to Say It
• The Korean Birthday Song
• 14 Birthday and Well-Wishing Phrases
• Korean Birthday Traditions: Seaweed Soup and the First Birthday
• A Quick Word on Korean Age
• How to Pronounce “생일 축하해요”
• A Note on Hangul, the Alphabet That Makes This Easier
• 생일 축하해요! You're Ready to Celebrate in Korean

How to Say “Happy Birthday” in Korean

The everyday phrase you're after is:

• 생일 축하해요 (saengil chukhahaeyo) – “Happy birthday”

Worth breaking down, because it reveals something Korean does differently from English:

• 생일 (saengil) – “birthday” (생 = life/birth, 일 = day, so literally “birth day”)
• 축하해요 (chukhahaeyo) – “congratulations” (the polite form of 축하하다, chukhahada, “to congratulate”)

Notice that Korean doesn't actually wish anyone a “happy” day here. It congratulates them on having one. That's the same logic behind birthday greetings across much of East Asia, and it's a small but lovely reframing: you're marking the achievement of having lived another year, rather than simply hoping the day goes well.

The -해요 ending is what's called the 해요 (haeyo) speech level, the safe, everyday polite form. It works with colleagues, acquaintances, people a bit older than you, shopkeepers, anyone you're not on close casual terms with. If you only learn one version of this phrase, learn this one. It'll carry you through the vast majority of real situations.

Getting the Politeness Level Right: Four Ways to Say It

This is the part most phrasebooks skip, and it's the part that actually matters. Korean speech has built-in levels of formality, and swapping between them signals your relationship to the listener as clearly as a title would in English. Here's the ladder, from closest to most respectful:

• 생일 축하해 (saengil chukhahae) – casual (반말, banmal), for close friends, siblings, or people younger than you that you're on first-name terms with
• 생일 축하해요 (saengil chukhahaeyo) – standard polite, the safe default for almost everyone else
• 생일 축하합니다 (saengil chukhahamnida) – formal, used in speeches, announcements, work settings, or with someone you owe real respect
• 생신 축하드립니다 (saengsin chukhadeurimnida) – honorific, reserved for elders

That last one deserves a closer look. 생신 (saengsin) is the honorific form of “birthday”, used specifically when the birthday belongs to someone senior to you, a grandparent, a parent, an elderly teacher. And 드립니다 (deurimnida) comes from 드리다 (deurida), a humble version of “to give”, which Koreans attach to a verb to show extra deference toward the listener. Use the ordinary 생일 축하해요 with your grandmother and it isn't wrong exactly, but 생신 축하드립니다 is what shows you actually know how the language, and the culture, work.

The Korean Birthday Song

Yes, there's a Korean version, and it's sung to the exact same tune as the English “Happy Birthday to You”. The words are:

• 생일 축하합니다 (saengil chukhahamnida)
• 생일 축하합니다 (saengil chukhahamnida)
• 사랑하는 우리 [이름] 생일 축하합니다 (saranghaneun uri [ireum] saengil chukhahamnida) – “dear, beloved [name], happy birthday”
• 생일 축하합니다 (saengil chukhahamnida)

You'll notice the song sticks to the formal 합니다 level throughout, even when it's sung to a toddler. That's normal. Set lyrics like a song or a slogan don't flex the way live conversation does, so the formal form is simply what stuck when the tune was adapted into Korean.

14 Birthday and Well-Wishing Phrases

A generous bank of Korean to pull from, whether you're writing a card, texting, or looking for more to say once the main phrase is out.

Wishing them well:

• 행복하세요 (haengbokhaseyo) – “be happy”
• 건강하세요 (geonganghaseyo) – “stay healthy”
• 좋은 하루 보내세요 (joeun haru bonaeseyo) – “have a good day”
• 즐거운 생일 되세요 (jeulgeoun saengil doeseyo) – “have a joyful birthday”
• 더 멋진 한 해 되세요 (deo meotjin han hae doeseyo) – “have an even more wonderful year ahead”
• 오래오래 사세요 (oraeorae saseyo) – “live a long, long life” (a classic wish for grandparents)

The birthday setup:

• 생일 파티 (saengil pati) – “birthday party”
• 생일 케이크 (saengil keikeu) – “birthday cake”
• 선물 (seonmul) – “present” / “gift”
• 촛불을 꺼요 (chotbureul kkeoyo) – “blow out the candles”
• 소원을 빌어요 (sowoneul bireoyo) – “make a wish”

Extra ways to say congratulations:

• 축하해요! (chukhahaeyo) – “congratulations!” (works for any good news, not just birthdays)
• 축하드려요 (chukhadeuryeoyo) – a warmer, more respectful “congratulations”, sitting between the 해요 and 합니다 levels
• 정말 축하해요 (jeongmal chukhahaeyo) – “many congratulations” / “congratulations, really”

If you want these to actually stick rather than fade by next week, running them through spaced repetition works far better than reading a list once. We've built ready-made Anki flashcard decks for exactly this kind of phrase bank.

Korean Birthday Traditions: Seaweed Soup and the First Birthday

Two traditions are worth knowing if you're celebrating with Korean friends or family.

The first is 미역국 (miyeok-guk), seaweed soup, and it's eaten on birthdays by people of every age, not just children. The custom traces back to new mothers, who traditionally ate miyeok-guk after childbirth because the seaweed was believed to help recovery. Eating it on your own birthday is a quiet way of honouring your mother and the day she gave birth to you. There's a fun flip side too: Korean students are told never to eat miyeok-guk before an exam, because 미역 (seaweed) is slippery, and “slipping” (미끄러지다) is close enough in meaning to “failing” that mothers ban it from exam-day breakfast. On birthdays, though, it's practically mandatory.

The second is 돌잔치 (doljanchi), the first-birthday celebration, a genuinely big event, for some families bigger than the wedding itself. Historically, infant mortality was high enough that surviving to age one was a real milestone worth marking properly. The centrepiece is 돌잡이 (doljabi), a ritual where the baby is set in front of a table of objects, string for long life, money for wealth, a pencil or book for scholarly success, and whichever object the baby grabs is taken as a playful prediction of their future.

A Quick Word on Korean Age

You may have heard that Koreans count age differently, and it's true, sort of. Under the traditional system, known as 세는 나이 (senneun nai, “counting age”), a newborn was already considered one year old at birth, and everyone gained a year together on New Year's Day rather than on their individual birthday. So under the old counting, your Korean age could run one or even two years ahead of your international age.

In June 2023, the South Korean government officially standardised most legal and everyday contexts to 만 나이 (man nai), international age, so the gap is fading fast. You'll still hear people mention their Korean age casually, especially older generations, but it's no longer the default. Worth knowing, not worth worrying about.

How to Pronounce “생일 축하해요”

A few sounds worth getting right:

• 축하 (chukha), the tricky bit. Spelled with a ㄱ followed by a ㅎ, but Korean blends those two together when spoken, so it comes out closer to “chuka” than a hard “chuk-ha” with a pause in the middle. The initial ㅊ in 축 is already a puff-of-air “ch”, like the “ch” in “church”, not the softer sound of ㅈ.
• 생일 (saengil), say “sang-il”. The 애 vowel in 생 sounds like the “e” in “bed”, not like “ay” in “day”.
• The eu vowel (ㅡ), which shows up in 드립니다 (deurimnida). It's an unrounded “uh” sound, made with a flat, relaxed mouth and no lip rounding, quite different from “oo”. Try saying “uh” while pulling the corners of your mouth back into a flat line, almost a slight smile.
• Rhythm. Korean is syllable-timed, each syllable roughly equal length, unlike English, which leans hard on stressed syllables and rushes the rest. So 생일 축하해요 comes out even and clipped, sang-il-chu-ka-hae-yo, rather than swung with one syllable punched louder than the others.

If you want to hear all of this from native speakers rather than guessing from romanisation, we're big fans of KoreanClass101 for exactly this kind of listening practice.

A Note on Hangul, the Alphabet That Makes This Easier

One more thing that helps if Korean is new to you: Hangul, the Korean alphabet, is what's called a featural writing system, the only major one in the world built this way. When it was designed in 1443, the shapes of the consonants were drawn to mirror the shape your mouth and tongue make when producing that sound. ㄱ, for instance, echoes the tongue arching up to touch the back of the mouth for a “g” or “k” sound. It's a big part of why Hangul is famously quick to learn. If you haven't tackled it yet, our guide to the Korean alphabet will have you reading it within a few hours.

생일 축하해요! You're Ready to Celebrate in Korean

You've now got the everyday phrase, all four politeness levels and when each one applies, the birthday song, a full bank of related phrases, the traditions that go with them, and the pronunciation to pull it off. That's more than enough to celebrate a birthday properly in Korean, whether it's a colleague, a close friend, or your partner's grandmother.

If you want to keep building from here, our guide to saying hello in Korean is a natural next step for rounding out your everyday greetings. And if you'd like proper structured support turning phrases like these into real conversations with real people, that's exactly what we help you do inside the Fluent in 3 Months Bootcamp.

생일 축하해요, whoever you're celebrating with next!