Korean Speech Levels, When to Use Haeyo vs Hamnida
The official difference between Korean's haeyo and hamnida speech endings, based on the National Institute of Korean Language's own definitions.
Korean learners quickly notice that the same verb can end several different ways depending on who's being spoken to, and the two endings that come up constantly are -요 (as in 해요, haeyo) and -습니다/-ㅂ니다 (as in 합니다, hamnida). Both are polite. The difference between them is not politeness level, it's formality, and Korea's National Institute of Korean Language (국립국어원) defines that distinction directly.
The actual definitions, from the source
The National Institute of Korean Language's Standard Korean Dictionary defines these two endings precisely:
- 해요체 (haeyo-che): "하나의 상대 높임법. 상대편을 보통으로 높이는 뜻을 나타내는 종결형으로, 격식체인 '하오체'와 '하십시오체'를 쓸 자리에 두루 쓰는 비격식체이다." In translation: one of the speech-level categories that raises the listener to an ordinary degree of respect, and is classified specifically as a non-formal style used broadly in place of the formal 하오체 and 하십시오체 styles.
- 하십시오체 (hasipsio-che): "하나의 상대 높임법. 상대편을 아주 높이는 종결형." One of the speech-level categories that raises the listener to the highest degree of respect, and is classified as formal.
The key word in the official definition of 해요체 is 비격식체: non-formal. Both endings show respect to the listener. 해요체 does it in a non-formal register; 하십시오체 (and its close relative 합니다체, which hamnida belongs to) does it in a formal register. That is the entire distinction in one sentence: haeyo is polite-but-casual, hamnida is polite-and-formal.
When the Institute says each one is appropriate
A learner asked the National Institute of Korean Language's public language Q&A service directly whether haeyo-che is appropriate in official settings, such as giving a presentation or reporting to a superior. The Institute's answer pointed back to the classification itself: since haeyo-che is defined as a non-formal style (비격식체), whether it belongs in a formal, official setting can be judged based on that classification. In other words, the Institute doesn't issue a blanket "never use haeyo formally" rule, but it anchors the answer in the dictionary's own formal-versus-non-formal label, which in practice means hamnida-style endings are the safer and expected choice for things like presentations, news broadcasts, and formal reports to someone senior.
What this looks like in practice
Take the verb 가다 (gada, "to go") and 먹다 (meokda, "to eat") across both endings:
| Verb | Haeyo-che (non-formal polite) | Hamnida-style (formal polite) |
|---|---|---|
| 가다 (to go) | 가요 (gayo) | 갑니다 (gamnida) |
| 먹다 (to eat) | 먹어요 (meogeoyo) | 먹습니다 (meokseumnida) |
| 좋다 (to be good) | 좋아요 (joayo) | 좋습니다 (joseumnida) |
Both columns are polite. Neither one is rude or casual in the way dropping the ending entirely (반말, banmal) would be. The difference is register: haeyo-che is what you'd use with a coworker at lunch, a store clerk, or in most everyday polite conversation, while the hamnida-style ending is what you'd use giving a presentation, speaking in a news broadcast style, or addressing someone in a distinctly formal context.
Why Korean phrasebooks lean on haeyo-che
Most Korean phrasebooks built for foreign learners default to haeyo-che endings for a practical reason: it is the broadly applicable non-formal polite style, usable with strangers, service staff, coworkers, and most people you'd meet while traveling, without the stiffness that a formal ending can carry in a casual setting. Learning haeyo-che first covers the overwhelming majority of situations a traveler or early learner encounters, while hamnida-style endings become more relevant later, specifically for formal, public, or professional contexts.
A simple rule that follows from the official definition
Since the dictionary definition hinges on formality rather than a vague notion of "more polite," the practical rule becomes straightforward:
- Everyday polite conversation (shopping, ordering food, chatting with a coworker, talking to someone older but not in a formal setting): haeyo-che.
- Formal, public, or professional contexts (presentations, news-style speech, addressing someone significantly senior in an official capacity): hamnida-style endings.
Neither ending is ever appropriate to drop casually with someone clearly older or in a position of authority on a first meeting; that's a separate axis (politeness toward the listener) from the formality axis these two endings represent. Both haeyo-che and hamnida-style endings are polite toward the listener. Which one you reach for depends on how formal the situation is, not how much respect you intend to show.
Key takeaways
- 해요체 (haeyo) is officially defined as a non-formal (비격식체) way of showing ordinary respect to the listener; 하십시오체/합니다체 (hamnida) is defined as the formal way of showing the highest respect.
- Both endings are polite; the difference between them is formality of the situation, not degree of politeness toward the person.
- The National Institute of Korean Language points to this exact classification when asked whether haeyo-che fits formal settings like presentations or reports to a superior.
- As a practical default: use haeyo-che for everyday polite conversation, and switch to hamnida-style endings for presentations, broadcasts, or clearly formal, official contexts.