Happy Birthday in Korean: Formal, Polite & Casual Phrases With Happy Birthday Song

So you want to wish someone a happy birthday in Korean? Maybe you've got a Korean friend whose special day is coming up, or you're a K-pop fan who wants to send birthday wishes to your favorite idol. Whatever the reason, learning how to say happy birthday in Korean is actually pretty straightforward, but there are a few different versions depending on who you're talking to. Korean has this whole formality system built into the language, so the way you say it to your best friend is totally different from how you'd say it to your boss or an elder. Let me break down everything you need to know.

The basic phrase: 생일 축하해요

The most common way to say happy birthday in Korean is 생일 축하해요 (saengil chukahaeyo). This is the polite version that works in most everyday situations. You can use this with friends, coworkers, acquaintances, or pretty much anyone you're on friendly terms with but still want to show some respect.

Here's how to pronounce it: "seng-il choo-kah-heh-yo". The 생일 (saengil) part means "birthday" and 축하해요 (chukahaeyo) means "congratulations" or "celebrate". Put them together and you've got the Korean equivalent of "happy birthday".

This phrase hits that sweet spot of being respectful without sounding overly formal or stiff. If you only learn one version, make it this one.

Going formal: 생일 축하합니다

When you need to show more respect, like when you're talking to someone older, your boss, a teacher, or someone you don't know well, you use 생일 축하합니다 (saengil chukahamnida). This is the formal version.

Pronunciation wise, it sounds like "seng-il choo-kah-hahm-nee-dah". The structure is the same, you're just using the formal ending 합니다 (hamnida) instead of the polite 해요 (haeyo).

You'd definitely use this version if you're writing a birthday message to a client, addressing an elder at a formal gathering, or posting a public birthday greeting to someone in a position of authority. When in doubt with someone older or in a professional context, go formal.

Getting casual: 생일 축하해

With close friends or people younger than you, you can drop the formality and just say 생일 축하해 (saengil chukahae). This is the casual, informal version.

It sounds like "seng-il choo-kah-heh". You're basically dropping the polite ending entirely. This is what you'd text your best friend or say to your younger sibling.

Be careful with this one though. Using casual speech with someone you should be showing respect to can come off as rude or disrespectful in Korean culture. Age and relationship matter a lot in Korean, so make sure you've got that casual relationship established before you use this version.

The Korean birthday song

Just like in English, Koreans have a birthday song they sing at parties. The melody is exactly the same as the English "Happy Birthday" song, but the lyrics are in Korean.

The most common version goes:

The third line means "dear (name)" where 사랑하는 (saranghaneun) means "beloved" or "dear". You insert the person's name and add 씨 (ssi), which is a polite way to address someone, kind of like "Mr." or "Ms." but more casual.

Do they sing happy birthday in Korean? Absolutely. Birthday parties in Korea include cake, candles, and the birthday song just like in many other countries. Some people sing the English version, some sing the Korean version, and some families do both.

There's also a more traditional Korean birthday song called "생일 축하 노래" but the version above is way more common these days, especially among younger people.

Different ways to wish someone a happy birthday

Beyond the standard phrases, there are other ways to send birthday wishes in Korean:

Birthday wishes for different relationships

How you wish someone a happy birthday in Korean really depends on your relationship:

Sending birthday messages

When you send a birthday message in Korean, whether it's a text, a card, or a social media post, you can keep it simple with just 생일 축하해요 or add more personal touches.

Common additions include:

You can also add emojis, which Koreans use pretty liberally in casual messages. Birthday cake 🎂, party popper 🎉, and heart emojis are all common.

Korean birthday traditions

While we're talking about birthdays, it's worth knowing a few Korean birthday traditions. Koreans celebrate 돌 (dol), a baby's first birthday, with a huge party. There's also 칠순 (chilsun) for the 70th birthday and 팔순 (palsun) for the 80th, which are big family celebrations.

On birthdays, Koreans traditionally eat 미역국 (miyeokguk), which is seaweed soup. The tradition comes from the fact that mothers eat this soup after giving birth for its health benefits, so eating it on your birthday is a way to remember and honor your mother.

Birthday cakes are definitely a thing in modern Korea, usually decorated elaborately and often featuring fresh fruit. The whole candle-blowing and wish-making tradition happens here too.

Anyway, if you want to level up your Korean learning beyond birthday phrases, Migaku's browser extension and app let you look up Korean words instantly while watching K-dramas or reading Korean content online. You can save words, see definitions, and build your vocabulary from real content you actually enjoy. There's a 10-day free trial if you want to check it out.

Learning more Korean with YouTube videos

K-dramas and K-pop are actually great resources for learning Korean because you get exposed to natural conversation and different formality levels. You'll hear characters use casual speech with friends and formal speech with elders, which helps you understand when to use what. If you are learning the vocabulary of any specific topic in Korean, you can also search up videos on YouTube to get more thorough explanations.

Learning languages in 2026 is getting so convenient!