Choosing a Speech Level: A Decision Guide

English lets you hover comfortably at "polite enough" in a single flat register — you can say "could you send me that file?" to your boss, your barista, and your little brother and never once be wrong. Korean does not grant that luxury. Every sentence forces you to commit to a speech level before the verb even leaves your mouth, and the commitment is visible in the ending. That is intimidating at first, but it becomes automatic once you run the choice through a fixed procedure. This page gives you that procedure: a two-second scan you do before the sentence, not mid-verb.

The two-second scan

Before you speak or write, ask four questions in order and stop at the first that applies:

1. Am I writing to a general reader? → 한다체
2. Is the setting formal or public, or the status gap large? → 합니다체
3. Am I talking with an adult I don't clearly outrank (or any stranger)? → 해요체
4. Is 반말 actually licensed here? → 해체 / 반말 — and if you're not sure, stay in 해요체.

The whole art is running this scan up front. Deciding halfway through a verb is how you end up stalling on 하…—세요? —어? Decide the register first; then conjugate to it.

Step 1 — Are you writing to a general reader? → 한다체

If the words are going onto a page for a general audience — a report, an essay, a news article, a diary, product copy — the register is the neutral written plain style, 한다체. It addresses no particular listener, so it carries none of the politeness machinery of speech.

The exception inside writing is anything addressed to a specific reader — a personal letter, an email, a chat message — which behaves like speech and takes 해요체 or 합니다체. Step 1 is for writing aimed at everyone, not at one named person.

Step 2 — Is the setting formal or public, or the gap large? → 합니다체

Some settings are formal by their nature, regardless of how you feel about anyone present: a presentation, a ceremony, a first business meeting, a service announcement, broadcasting, the military, the news desk. And some relationships carry a large enough status gap — addressing a customer, a high official, a large audience — that formality is expected. In all of these, reach for the crisp formal-polite 합니다체.

Step 3 — Talking with an adult you don't clearly outrank? → 해요체

This is the workhorse. For essentially any individual adult you're speaking with — a stranger, an acquaintance, a coworker, a shopkeeper, a friend's parent, anyone whose relationship to you isn't securely "junior" — the safe, warm, everyday register is 해요체. It is polite without being stiff, which is why it dominates daily Korean life.

Step 4 — Is 반말 actually licensed? → 해체

Casual 반말 is not something you grant yourself. It has to be licensed: a close friend of similar age (usually by mutual agreement — see 말 놓다), someone clearly younger, a family junior, or a child. If one of those clearly holds, drop into 반말; if it doesn't clearly hold, you stay in 해요체.

The asymmetry: when unsure, round up

Here is the single most useful principle in the whole module, and it is not symmetric. Under-shooting politeness offends far more than over-shooting it. Casual speech to someone who expected deference reads as disrespect — a real social injury. Speech that is too formal merely feels a touch stiff or distant, which is mildly awkward at worst. The costs are wildly unequal, so when you genuinely cannot tell, round up to 해요체 or 합니다체.

There is a timing reason too: you can always be granted 반말 later — a senior will often invite it — but you cannot un-say an unlicensed 반말. The formal-to-casual door opens easily; the casual-to-formal retreat is embarrassing. Erring formal keeps every door open.

Common Mistakes

1. Choosing by how you feel about the person instead of the social calculus. Warm feelings toward an older coworker are not a license for 반말 — age, status, setting, and explicit license decide the register, not affection.

2. Under-shooting with a stranger. 반말 to someone you've just met is a classic transfer error — English casualness doesn't map onto it.

3. Under-formalizing a genuinely formal setting. A formal presentation or first business contact expects 합니다체; sliding into 해요체 there can read as too casual.

4. Freezing mid-verb. Trying to decide the register while conjugating produces a stalled 하…—어…—세요? Run the four-step scan before you start the sentence; the ending then follows automatically.

Quick reference

Key Takeaways

• Run a four-step scan before the sentence: writing → 한다체; formal/public → 합니다체; ordinary talk with an adult → 해요체; licensed casual → 반말.
• 해요체 is the low-risk default with individuals — when torn between it and 합니다체, choose 해요체.
• Decide register by social calculus (age, status, setting, explicit license), not by how friendly you feel.
• The error is asymmetric: under-shooting politeness offends much more than over-shooting, so round up when unsure — you can be granted 반말 later, but you can't un-say it.