What Is the Difference Between Banmal and Jondaetmal?

 

Written by a Korean-born writer who spent three decades in the airline industry, sharing what growing up in Korea actually looks like.

Introduction: "Should We Drop the Formalities Now?"

A foreign student has been learning Korean for several months. She orders coffee at cafes in flawless formal speech, and she's always spoken to her Korean friend in polite jondaetmal.

Then one day, a friend she's known for months asks her, smiling, "Should we drop the formalities now?" The student freezes for a moment.

Grammatically, she understands the sentence, but she has no idea exactly what she's being asked to agree to. Is she not supposed to keep using formal speech? Why is this question coming up right now?

In short: Banmal and jondaetmal differ in actual grammar, not just tone, and switching from formal to casual speech in Korean usually requires an explicit mutual agreement, almost like a small social ritual, rather than happening automatically.

The two concepts of banmal and jondaetmal are terms any foreigner learning Korean hears early on. But exactly how the two differ, and why switching between them sometimes feels like a ritual you need permission for, is hard to fully grasp from a grammar textbook alone.

This piece unpacks the real difference between these two speech styles and the rules that govern switching between them.

For the broader picture of why age drives so much of this in the first place, this earlier piece breaks down the social side of the equation.

What Exactly Is Different, Grammatically

The Sentence Ending Changes Completely

The difference between banmal and jondaetmal isn't a matter of word choice, it's a grammatical difference in which the entire sentence-ending shifts. The jondaetmal sentence "Bap meogeosseoyo?" ("Have you eaten?") becomes "Bap meogeosseo?" in banmal.

In settings that call for even more formality, an even stiffer expression like "Siksahasyeotsseumnikka?" might be used instead. Korea's system of speech formality isn't simply divided into two levels, it can break down into several layers depending on the situation.

That said, in everyday conversation, the distinction a foreign learner encounters first, and most often, is this core divide between banmal and jondaetmal. Picking the wrong one in front of a room full of people, even briefly, is the kind of small stumble that can make a learner's face turn red instantly.

Concrete Differences Across Sentence Types

To make this difference clearer, here are a few examples of how the same sentence changes between banmal and jondaetmal.

Sentence Type	Jondaetmal	Banmal
Question	Bap meogeosseoyo? (Have you eaten?)	Bap meogeosseo?
Statement	Jeo ije gayo (I'm leaving now)	Na ije ga
Suggestion	Gachi gasillaeyo? (Would you like to go together?)	Gachi gallae?
Exclamation	Jeongmal joneyo (That's really nice)	Jinjja jota
Addressing someone	Title or name + -ssi, instead of a direct pronoun	Neo ("you"), or the person's name directly

As the table shows, the difference shows up not just in sentence endings, but in how you refer to the other person. In a jondaetmal relationship, directly calling someone neo is rare, people use a title or name plus -ssi instead.

Jondaetmal Is a Language of Distance, Not Just Age

Explaining jondaetmal purely in terms of age isn't quite accurate. It's used broadly with people you've just met, in formal settings, with customers, and with anyone of higher rank.

Even when an age gap isn't large, jondaetmal remains the default as long as enough closeness hasn't built up yet. It functions less as "this person is older than me" and more as "there's still some distance between us."

Two coworkers who started on the same day, both in their late twenties, might still speak jondaetmal to each other a full year later, simply because neither one has ever brought up dropping the formalities.

What "Dropping the Formalities" Really Means: A Ritual of Permission

Switching to Banmal Isn't Automatic, It Requires Agreement

This is where foreign learners are often surprised. Even when two people confirm they're the same age, switching to banmal still doesn't happen automatically.

Korean has an expression, mareul nota ("to drop the formal speech"), referring to setting aside jondaetmal for a more comfortable register. This switch is typically initiated when one person proposes it, "Should we drop the formalities?", and the other agrees.

It usually requires passing through a small ritual in which both people acknowledge the relationship has moved to a closer stage.

I spoke only in jondaetmal with one of my oldest friends for more than ten years. When we first met, there was a small age gap between us, and once we'd both grown comfortable with formal speech, there was never really a moment that prompted a change.

Then, one year, after spending several days together on a trip, I still remember the moment she asked me, "Don't you think we could drop the formalities now?" Grammatically, it was a tiny shift. But in that moment, I felt the relationship move into an entirely different stage.

Why One-Sided Banmal Relationships Persist Naturally

In Korean relationships, it's common for an asymmetric pattern to persist between two people with an age gap: the older person uses banmal, the younger continues using jondaetmal.

From a Western perspective, this might feel unfair, but Koreans tend to accept it as a natural custom rather than a sign of inequality. Among friends closer in age, though, it's become increasingly common for both people to switch to banmal together.

There's one major exception to all of this: the moment two people discover they're exactly the same age, which skips the ritual entirely — that phenomenon gets its own article.

Suddenly Switching to Jondaetmal as a Joke

The switch between banmal and jondaetmal isn't always serious. Among friends normally comfortable using banmal, one person suddenly switching to exaggerated jondaetmal as a joke is a fairly common bit.

If a friend shows up late, someone might tease them with, "Oh my, I had no idea you'd be running so late," delivered in deliberately over-the-top formal speech. This isn't meant to create distance, it's the opposite, this kind of humor is only possible because the two people are already close.

Relationships Where Jondaetmal Persists as an Exception

Some Families Use Jondaetmal Between Parents and Children

The use of jondaetmal and banmal doesn't always track precisely with closeness. In some Korean households, children are raised from a young age to use jondaetmal with their parents even into adulthood, seen as a mark of a family that emphasized formality.

Plenty of other families speak comfortably in banmal with their parents too. The line isn't determined purely by age or closeness, it varies with a family's culture or personal choice.

Why Some Parents Use Jondaetmal With Babies Who Can't Even Talk Yet

Some Korean parents speak to their newborns in jondaetmal, even before the child has learned to speak. At first glance, this seems pointless.

It's closer to an intentional parenting approach: rather than a child learning banmal first and picking up jondaetmal separately later, the idea is to build jondaetmal into their speech from the start, so it never feels unfamiliar or comes across as ill-mannered later on.

Even as the child naturally grows into using banmal with parents or close family, the underlying intention is to make sure jondaetmal itself never feels foreign to them.

Common Misunderstandings

• ❌ Myth: The moment you learn someone's age, switching to banmal automatically becomes fine.
• ⭕ Reality: Even once ages are confirmed as the same, switching usually requires one person to propose it first and the other to agree.
• ❌ Myth: Jondaetmal is only used with people older than you.
• ⭕ Reality: It's used broadly with new acquaintances and in formal settings, functioning more as a marker of distance than age alone.
• ❌ Myth: It's always natural to use banmal between parents and children.
• ⭕ Reality: In some Korean households, even adult children continue using jondaetmal with their parents, depending on that family's upbringing.

What Koreans Actually Say

The lines below aren't direct quotes from real interviews — they're representative of the kind of language Koreans commonly use in these situations.

Foreigner: "You've known this person's age for months, why still use formal speech?" Korean: "There was never really a moment to drop it. It just felt comfortable to stick with polite speech." (thinking: I genuinely never thought to change it.)

Foreigner: "Why did you propose dropping the formalities first?" Korean: "I guess I just felt comfortable enough. Staying formal forever starts to feel distant."

Foreigner: "Why do you still use jondaetmal with your own parents?" Korean: "I was raised that way since I was little. Banmal actually feels more awkward to me now."

Practical Advice for Foreign Readers

Default to Jondaetmal When You're Not Sure

When unsure exactly what stage a relationship is at, defaulting to jondaetmal is the safest choice. Sticking with formal speech is almost never seen as rude, but switching to banmal too early can easily come across as disrespectful.

Wait to Be Invited, or Ask Directly

If a foreign reader feels genuinely close to a Korean friend, it's natural to either wait for the other person to propose dropping the formalities, or ask directly: "Should we drop the formalities now?" This is almost never taken as rude.

If a Friend Suddenly Starts Using Banmal First

Sometimes a Korean friend simply starts mixing in banmal naturally, without any explicit proposal. This generally means the friend feels the relationship has become comfortable enough, not a sign of rudeness.

It's completely fine to match their banmal. If it still feels awkward, a short line like "I'll drop the formalities too, then" makes for an easy transition.

Stick With Jondaetmal at Work Unless Told Otherwise

If working at a Korean company, it's safest to keep using jondaetmal unless a coworker explicitly proposes switching. The workplace calls for formality, and jondaetmal often stays in place during work hours even once people feel genuinely close.

Don't Worry Too Much About Getting It Wrong

Foreign readers shouldn't feel too anxious about mixing up banmal and jondaetmal while learning Korean. Koreans are generally forgiving of this kind of mistake, and often respond warmly to the effort of trying to learn Korean at all.