존댓말 vs 반말: Korean Politeness, Made Simple

The question I get most often in Seoul Mate: "When do I use 존댓말, and will Koreans think I'm rude if I get it wrong?" Deep breath. The honest answer: as a learner, you get a generous pass — and the system is more logical than it looks.

The two speech levels

Korean bakes politeness into the verb ending, not just word choice.

• 존댓말 (jondaenmal) — polite/formal speech. Ends in -요 or -습니다.
• 반말 (banmal) — casual/intimate speech. Drops the ending.

Same meaning, different temperature:

• 밥 먹었어요? (Did you eat? — polite)
• 밥 먹었어? (Did you eat? — casual)

The safe default

When in doubt, use 존댓말. With strangers, shopkeepers, elders, coworkers, anyone older, and anyone you just met — 요 is your friend. You will never offend someone by being too polite. That's the whole trick: politeness is the safe direction.

When can you switch to 반말?

Only when the relationship earns it. Two green lights:

1. They invite you. There's a lovely phrase: "말 놓자" (mal noja) — literally "let's put our words down," meaning "let's drop the formality." When someone says this, you're being welcomed closer.
2. Age + closeness. Close friends of similar age, or someone clearly younger who's comfortable, or family.