Can you say 수고하셨습니다 to your boss?

If your feed leans Korean at all, you have been watching people say goodbye to summer all month. The song underneath it is 할카리’s おつかれSummer, a 2003 J-pop track that came back through short-form video twenty-two years later and got an official music video out of it; in Korean it goes around as 수고했어, 여름. Billboard Korea’s interview with NCT WISH on 7 August 2026 credits the group as one of the drivers of the challenge in Korea, and the meme archive at 인스타공백닷컴 logs its run as June through August, the kind of thing you post when something is finishing (Billboard Korea, 7 August 2026; 인스타공백닷컴, 2 August 2026).

You can post that caption without a second thought, because summer is not going to take offense.

The person sitting two desks away might. 수고했어 is the casual form of a verb that Korean’s own etiquette standard tells you not to point upward, and it is the single most common thing learners say to a boss at 6 p.m. So here is the version worth having in your notes.

Can you say 수고하셨습니다 to your boss?

Not according to the standard. The 국립국어원 — the National Institute of Korean Language — has answered this repeatedly, and the answer does not move: “according to Standard Language Etiquette, expressions like 수고하다 or 고생하다 can give the impression of assessing a superior’s efforts, so using 수고하셨습니다/고생하셨습니다 to a superior is not appropriate.” The institute’s suggested replacements are 안녕히 계십시오 or 고맙습니다, depending on the situation (국립국어원 온라인가나다, answered 24 February 2025).

Two things follow from that, and you need both.

The first is that the honorific ending is not what is being judged. 수고하셨습니다 already has -시- in it and already ends in -습니다. It is as polite as Korean grammar knows how to make a sentence, and the standard still says no — because the objection is to the verb, not the ending.

The second is that real workplaces break this rule constantly. The institute’s own question board is the evidence: the answer above has been read more than 106,000 times, and the same question keeps arriving in new words — from an office worker who had just said it to their boss and wanted to know if that was wrong (answered 19 April 2025), from someone asking whether 고생하세요 is any better on the way out the door (answered 30 June 2025), from a team member looking for something to say when the manager comes back from a meeting (answered 4 September 2025). Nobody asks a question that many times about a rule everyone follows.

So the honest shape of the answer is: the standard is clear, the practice is not, and you are better off knowing which one you are choosing.

What 수고 actually means

The reason the rule exists is sitting in the dictionary entry, and it takes about ten seconds to see.

표준국어대사전 defines the noun 수고 as 일을 하느라고 힘을 들이고 애를 씀. 또는 그런 어려움 — putting in effort and taking pains in order to do something, or the difficulty involved. The verb 수고하다 is the same thing in verb form: 일을 하느라고 힘을 들이고 애를 쓰다.

Read that as a sentence you are saying to someone. 수고하셨습니다 means “you expended effort and took pains.” That is a description of how hard someone worked — which is to say, an assessment of their labor. English does the same thing and hides it better: “you worked hard today” is a perfectly nice sentence to say downward and a slightly odd one to say to a director.

Its heavier neighbor works the same way. 고생하다 is recorded with the Sino-Korean origin 苦生 and glossed 어렵고 고된 일을 겪다 — to undergo difficult and grueling things. So 고생하셨습니다 says something stronger than 수고하셨습니다: not just that they put in effort, but that they went through something hard. Learners often reach for it thinking heavier equals more respectful. It is not more respectful. It is a bigger claim about the other person’s experience, which is exactly the thing the standard objects to.

The related adjective 수고롭다, 일을 처리하기가 괴롭고 고되다, points the same direction: this whole word family is about effort as a burden.

Who you can say it to

The full passage from Standard Language Etiquette, quoted by the institute in its answers, is unusually specific about direction. Sorting it into a table is the fastest way to hold it:

You are speaking to	수고 forms	The standard’s wording
A superior	avoid	수고하십시오 on your way out “is not desirable to use to a superior” — the listener may be displeased
A peer, same age or rank	fine	먼저 갑니다. 수고하세요. is given as a model
Someone junior to you	fine	잘 가세요. 수고했습니다. is given as a model
Someone leaving while you stay	use the neutral form	안녕히 가십시오, 안녕히 가세요
A friend, casually	fine	the casual 수고했어 lives here

That passage also notes something worth noticing about why the mistake is so persistent: “young people who say this do not think it is inappropriate as a greeting, but the person hearing it may be displeased” (국립국어원, answered 19 April 2025). The rule survives in the standard partly because the two sides of the conversation do not experience the sentence the same way. As a learner you are unlikely to hear that reaction, since nobody corrects a foreigner’s 수고하셨습니다.

What to say instead

Everything below comes from the institute’s own answers.

Leaving before your boss does:

먼저 들어가겠습니다. — “I’ll head in first.”
먼저 가겠습니다. or 먼저 나가겠습니다.
내일 뵙겠습니다. — “I’ll see you tomorrow.”

Acknowledging that someone senior has just done something demanding:

오늘도 애 많이 쓰셨습니다. — the institute offers this one directly, and notes that usage examples show 애쓰다, 마음과 힘을 다하여 무엇을 이루려고 힘쓰다, being used about superiors.
고맙습니다. or 감사합니다. — thanking someone is never structurally a judgment of them.

Staying while someone else leaves:

안녕히 가십시오. or 안녕히 가세요.

One form to skip: the same passage advises against 먼저 실례하겠습니다, noting that while many older speakers no longer find it jarring, it still does not sit right in Korean.

Why this one keeps getting argued about

If you have Korean colleagues, you may have already noticed the gap between this rule and Monday morning. You are not imagining it, and the institute knows.

In September 2025 someone wrote in to argue the position should be retired — that treating 수고 and 고생 as near-negative assessments forces people toward literary words like 노고 that nobody uses in daily speech, and that the guidance reflects a vertical, authoritarian model of workplace language rather than how people actually talk now. The institute’s reply, on 22 September 2025, was three lines long: it would record the comment as a suggestion (국립국어원 온라인가나다).

So as of this writing the standard has not changed, and the disagreement is on the record at the institute’s own address. That is the accurate picture to carry: not “the rule is dead,” and not “you will offend someone,” but a norm that is still official, still taught, and increasingly contested.

If you want a rule of thumb for the gap, use the direction of the risk. Saying 먼저 들어가겠습니다 to a manager who would not have minded 수고하셨습니다 costs you nothing. The reverse can cost you something small with someone who was raised on the standard. Asymmetric risk, easy call.

The mental model: check the verb, not the ending

This is the part that transfers past this one phrase, and it is why the topic is worth ten minutes.

Most of the politeness machinery you have studied is grammatical. You raise the subject with -시-, you raise the listener with the speech level you pick, you swap in the humble form of a verb. All of that is adjustable at the ending, which is where beginner courses put the work.

수고하셨습니다 is the case where that machinery runs out. The problem is not encoded in the ending at all — it is in the lexical meaning of the stem, which positions you as the person appraising the listener’s effort. No ending fixes a stem like that. And notice what the institute’s own workaround is: it does not suggest a more honorific form of 수고하다. It suggests a different word, 애쓰다, and a different speech act, thanking.

So the check to run, whenever a phrase feels risky upward, is two questions in order:

What does this verb literally say about the listener? If the answer is a description of their effort, their state, their ability, or their difficulty, you are making an evaluation, and honorific endings do not neutralize it.
Can I switch to thanking or to describing myself instead? 고맙습니다 is about your gratitude. 먼저 들어가겠습니다 is about your own departure. Neither one puts you in the assessor’s chair.

That pair of questions is what you actually keep. It is the same habit the sentence-ending 게 rewards from the other direction — knowing what a form does to the person you are speaking to, not just what it translates as.

So can you use 수고했어 at all?

Yes, and often. It is one of the most useful things you can say to a peer, and the standard explicitly allows 수고 downward and sideways.

수고했어. — to a friend or someone junior, after anything that took effort.
수고했어요. — the same, slightly more polite, still not upward.
먼저 갑니다. 수고하세요. — leaving, to a peer.
수고했어, 여름. — and to the season, which is the caption that started this.

The last one is worth a second of attention, because it shows the rule from outside. Nobody worries about the register of that caption. There is no listener to appraise, no seniority in the room, so a verb that would be delicate at 6 p.m. on Friday is completely relaxed at the end of August. Register in Korean is rarely a property of the word by itself. It is a property of the word plus who is standing in front of you.

What to take from this

수고하다 literally means to expend effort and take pains, so 수고하셨습니다 reads as an assessment of how hard the listener worked.
The 국립국어원 standard says not to aim 수고하셨습니다 or 고생하셨습니다 at a superior. Honorific endings do not fix it, because the problem is in the stem.
고생하셨습니다 is the heavier one, not the more respectful one.
Upward, use 먼저 들어가겠습니다, 내일 뵙겠습니다, 고맙습니다, or 애쓰셨습니다.
Sideways and downward, 수고했어 and 수고하세요 are fine and normal.
Real workplaces break this rule daily and the norm is being argued over at the institute itself. Knowing the rule and choosing is different from not knowing it.

Here is the thing about a distinction like this one: reading it takes four minutes, and it still will not be there when you need it at 6 p.m. What makes it stick is meeting 먼저 들어가겠습니다 in a sentence, at your level, more than once — which is the argument in how I improved my Korean listening. up103 builds listening practice out of the notes you already keep, so the phrases you just decided to learn are the ones that come back at you. Founding Learners get 6 months free, then 50% off for life, at app.up103.com.

— 민지, up103