Declining Politely in Korean: -기 때문에, -는데, -을 수밖에 없다
To decline politely in Korean, use -기 때문에 (because), -는데 to soften (가고 싶은데… — I'd love to, but), and -을 수밖에 없다 (I have no choice but to).
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Written by Alvin Lim Certified Korean Language Teacher (Level 2)
To turn someone down kindly in Korean, lean on -기 때문에 (because), soften with -는데 (가고 싶은데… — I’d love to, but), and reach for -을 수밖에 없다 when it’s truly unavoidable: 거절할 수밖에 없어요 (I have no choice but to decline).
Saying “no” gracefully is a real skill — and Korean gives you the exact tools to refuse a 약속 (plan) without hurting feelings.
In the last lesson you learned to handle a phone call. Now imagine that call is an invitation you can’t accept — let’s learn to decline it warmly, with a reason.
Ten words for declining gracefully
These are the words that show up when you have to say “sorry, I can’t.”
-기 때문에: stating your reason
When you need to give a clear, firm reason, attach -기 때문에 to the verb or adjective stem. It means “because” and puts the spotlight squarely on the cause.
시간이 없기 때문에 못 가요 = because I have no time, I can’t go 일이 많기 때문에 바빠요 = I’m busy because there’s a lot of work 비가 오기 때문에 약속을 취소했어요 = I cancelled the plan because it’s raining 몸이 아프기 때문에 쉬어야 해요 = I have to rest because I’m sick
-기 때문에 is stronger and more explicit than the softer -아서/어서 (“since”).
One rule to remember: you can’t use -기 때문에 before a command or suggestion — for that, use -으니까. But for explaining why you must decline, it’s clear and respectful.
How do you soften a “no”?
To cushion a refusal, start with -는데. It sets up a gentle “but/however” — you acknowledge the wish first, then deliver the obstacle.
가고 싶은데 일이 있어요 = I’d love to go, but I have work 좋은데 오늘은 좀 어려워요 = it sounds nice, but today’s a bit hard 맛있는데 배가 불러요 = it’s tasty, but I’m full 만나고 싶은데 다른 약속이 있어요 = I want to meet, but I have another plan
By leading with 가고 싶은데 (I want to go, but…), you sound warm instead of cold.
And when the situation truly leaves you no option, use -을 수밖에 없다 — “there’s nothing for it but to”: 거절할 수밖에 없어요 = I have no choice but to decline.
Watch the 르-irregular verbs that pop up here too: 모르다 → 몰라요 (I don’t know), 다르다 → 달라요 (it’s different), 빠르다 → 빨라요 (it’s fast) — the 르 drops and a doubled ㄹㄹ appears.
What does a gentle refusal sound like?
Here’s an invitation softly declined, reason and all:
All three tools work together: 가고 싶은데 softens the lead-in, 일이 있기 때문에 gives the firm reason, and 거절할 수밖에 없네요 frames it as unavoidable. Cap it with 미안해요 and 다음에 꼭 갈게요, and you’ve said “no” without burning a bridge.
⚡ 2-Minute Check
Q 1 / 5Frequently asked questions
What's the difference between -기 때문에 and -아서/어서 for “because”?
Both give a reason, but -기 때문에 is stronger and more explicit — it spotlights the cause: 시간이 없기 때문에 못 가요 = it's BECAUSE I have no time that I can't go. -아서/어서 is softer and more everyday: 시간이 없어서 못 가요 = I can't go since I have no time.
One key rule: -기 때문에 cannot be used for commands or suggestions, but -아서/어서 and -으니까 can. For a firm, clear reason when declining, -기 때문에 fits well.
How does -는데 soften a refusal?
-는데 sets up background or a gentle contrast — it's the verbal equivalent of “I'd love to, but…”. 가고 싶은데 일이 있어요 = I want to go, BUT I have work.
By acknowledging the invitation first (가고 싶은데), you cushion the “no” that follows. It makes you sound warm rather than blunt.
Note: verbs take -는데 (가는데), but adjectives and 싶다 take -은데 (좋은데, 가고 싶은데).
When do I use -을 수밖에 없다?
-을 수밖에 없다 means “there's no choice but to ___. ” It frames an outcome as unavoidable: 거절할 수밖에 없어요 = I have no choice but to decline; 기다릴 수밖에 없어요 = we can only wait.
The 밖에 means “outside of / except,” so literally “there's nothing outside of doing it. ” It always ends with 없다.
Use it when you want to show the decision was forced by circumstances, not by your own wish.