One of the first things Korean learners discover is that Korean has multiple "levels" of politeness built directly into the grammar — different verb endings and different vocabulary are used depending on your relationship with the person you're speaking to. This isn't an optional flourish; it's a fundamental feature of the language. Get it wrong and you can seriously offend someone even if your Korean is otherwise correct. Get it right and native speakers will be genuinely impressed. Here is the honest guide to understanding and navigating the Korean honorific system.
Korean has 7 speech levels in theory, but in modern everyday Korean, 3 levels dominate: Formal Polite (합쇼체, hapshoche) — used in formal professional settings, broadcasts, presentations, and with customers. This is what you'll hear in news broadcasts and what most Korean language programs teach first. Standard Polite (해요체, haeyoche) — the most common speech level in modern Korean, used with strangers, acquaintances, colleagues you're not close to, and in most everyday polite situations. This is what you'll use most. Informal/Casual (해체, heche) — used with close friends, family, and people younger than you in informal settings. Using casual speech with someone who expects polite speech is rude. Using polite speech with close friends can feel cold or awkward.
The general rule: when in doubt, use Standard Polite (해요체). It's the safe default. Switch to Formal Polite in professional presentations or formal announcements. Only use Informal/Casual when the other person explicitly invites it (by speaking casually to you first or asking you to speak informally) or when you're clearly younger and they're a close friend. Age is important but relationship closeness matters more than age alone in modern Korean — close friends often speak casually regardless of age gap.
Beyond verb endings, Korean also has separate honorific vocabulary for certain concepts: "밥" (bap) is regular rice/meal, but "진지" (jinji) is the honorific version used when referring to a respected person's meal. "말" (mal) is regular speech, but "말씀" (malsseum) is the honorific version. "먹다" (meokda, to eat) becomes "드시다" (deushida) or "잡수시다" in honorific form. You don't need to memorize all of these immediately — knowing they exist and recognizing them when you encounter them is the first step.
The Bottom Line: Focus on mastering 해요체 (Standard Polite) first — it covers the majority of everyday Korean situations. Use 합쇼체 for formal professional contexts. Switch to 해체 only when the relationship clearly calls for it. When in doubt, more polite is always safer than more casual. The honorific system becomes intuitive with exposure — Korean dramas are excellent for seeing which level is used in which contexts.