Korean Formal vs Informal: When and How to Switch
Understand when to use formal vs informal Korean speech. Learn the key verb endings, practical rules, and how K-dramas show these switches in context.
If Korean honorifics feel overwhelming, start here. The practical reality is that most conversations use just two registers: polite informal (해요체) for everyday formal situations, and casual speech (반말) for close relationships. Master these two and you'll handle 90% of what you hear in K-dramas.
The Two Main Registers You Need
Korean technically has 6+ speech levels, but in practice, modern Korean uses mainly:
1.
해요체(hae-yo-che) — Polite informal: The -요 ending. Used in most social situations where you're being respectful but not excessively stiff.
2.
반말(ban-mal) — Casual speech: No -요 ending. Used with close friends, younger people, or family.
The other levels (합쇼체, 해체, etc.) appear in specific contexts — news broadcasts, military, historical dramas, addressing audiences — but 해요체 and 반말 cover everyday drama dialogue.
해요체 — Polite Informal (-요 endings)
해요체 is the most versatile and widely used speech level. It's polite enough for strangers and workplaces, yet warm enough for daily conversation. The key is the -요 suffix added to verb stems.
Forming 해요체: • Verb stems ending in ㅏ or ㅗ vowel → add 아요 (가다 → 가요) • Most other verb stems → add 어요 (먹다 → 먹어요) • 하다 verbs → 해요 (공부하다 → 공부해요)
어디 가요?
Eo-di ga-yo?
Where are you going?
가다 → 가요
뭐 먹어요?
Mwo meok-eo-yo?
What are you eating?
먹다 → 먹어요
한국어 공부해요.
Han-guk-eo gong-bu-hae-yo.
I study Korean.
공부하다 → 공부해요
괜찮아요.
Gwaen-cha-na-yo.
I'm okay. / It's okay.
괜찮다 → 괜찮아요
반말 — Casual Grammar
반말 is simply 해요체 with the -요 dropped — plus some vowel adjustments. Once you know 해요체, 반말 is easy.
• 가요 → 가 • 먹어요 → 먹어 • 공부해요 → 공부해 • 괜찮아요 → 괜찮아
The exception: some verbs have different endings entirely (있어요 → 있어, not 있요).
어디 가?
Eo-di ga?
Where are you going? (casual)
가요 → 가
뭐 먹어?
Mwo meok-eo?
What are you eating? (casual)
먹어요 → 먹어
괜찮아?
Gwaen-cha-na?
Are you okay? (casual)
괜찮아요 → 괜찮아
나 이거 싫어.
Na i-geo si-reo.
I don't like this.
싫어요 → 싫어 (drop -요)
Key Verb Endings Compared
Here's a quick reference for the most common verb endings in both registers:
Present tense (formal → casual)
먹어요 → 먹어
meok-eo-yo → meok-eo
eat (polite) → eat (casual)
Past tense (formal → casual)
먹었어요 → 먹었어
meok-eot-seo-yo → meok-eot-seo
ate (polite) → ate (casual)
Intention/promise (formal → casual)
할게요 → 할게
hal-ge-yo → hal-ge
I'll do it (polite) → I'll do it (casual)
Question ending (formal → casual)
뭐예요? → 뭐야?
mwo-ye-yo? → mwo-ya?
What is it? (polite) → What is it? (casual)
Quick Context Guide: Which to Use When
Use this as a quick reference:
Always 해요체:• Meeting someone for the first time • Anyone older than you (until they say otherwise) • Work colleagues (especially seniors) • Customer service situations
반말 is appropriate:• Close friends of similar age • Younger siblings or relatives • After both people agree to drop formalities • Small children
It depends:• Classmates — start with 해요체, switch to 반말 once comfortable • Online: often 반말 or 해요체 depending on community norms
FAQ
What happens if I accidentally use 반말 with the wrong person?▾
Do I need to learn 합쇼체 (very formal)?▾
Practice with Scenarios
🎬Practice in a Scenario →
Notice how characters switch between 해요체 and 반말 as the relationship progresses through the story.