The last date a product can be sold legally.
When to use
sale deadline, store display period, legal sale restriction
The nuance
Use 유통기한 only for the legal sale period in stores. Selling after this date is prohibited.
유통기한 (yu-tong-gi-han, yutonggihan) · 소비기한 (so-bi-gi-han, sobigihan)
유통기한 refers to the sale period, while 소비기한 indicates the safe consumption period.

One lane per word — no nested boxes, just the gist.
The last date a product can be sold legally.
When to use
sale deadline, store display period, legal sale restriction
The nuance
Use 유통기한 only for the legal sale period in stores. Selling after this date is prohibited.
The last date a product can be safely consumed.
When to use
safe consumption period, consumer health standard, post-sale safety
The nuance
Use 소비기한 to indicate the safe consumption period, regardless of sale status.
이 우유는 유통기한이 지났으니 판매할 수 없어요.
i u-yu-neun yu-tong-gi-han-i ji-nass-eu-ni pan-mae-hal su eop-eo-yo., i u yu neun yu tong gi han i ji nass eu ni pan mae hal su eop eo yo.
Correct because selling after 유통기한 is prohibited.
이 우유는 소비기한이 지났으니 판매할 수 없어요.
i u-yu-neun so-bi-gi-han-i ji-nass-eu-ni pan-mae-hal su eop-eo-yo., i u yu neun so bi gi han i ji nass eu ni pan mae hal su eop eo yo.
Wrong because 소비기한 doesn't regulate sale; 유통기한 should be used.
이 치즈는 소비기한이 지났으니 먹지 마세요.
i chi-jeu-neun so-bi-gi-han-i ji-nass-eu-ni meok-ji ma-se-yo., i chi jeu neun so bi gi han i ji nass eu ni meok ji ma se yo.
Correct as consumption after 소비기한 is unsafe.
이 치즈는 유통기한이 지났으니 먹지 마세요.
i chi-jeu-neun yu-tong-gi-han-i ji-nass-eu-ni meok-ji ma-se-yo., i chi jeu neun yu tong gi han i ji nass eu ni meok ji ma se yo.
Wrong because 유통기한 relates to sale, not consumption safety.
유통기한 내에 제품을 구매하세요.
yu-tong-gi-han nae-e je-pum-eul gu-mae-ha-se-yo., yu tong gi han nae e je pum eul gu mae ha se yo.
Correct as it advises buying within the legal sale period.
소비기한 내에 제품을 구매하세요.
so-bi-gi-han nae-e je-pum-eul gu-mae-ha-se-yo., so bi gi han nae e je pum eul gu mae ha se yo.
Wrong because 소비기한 doesn't guide purchase timing.
유통기한이 지난 음식은 상점에서 내려야 해요.
yu-tong-gi-han-i ji-nan eum-sik-eun sang-jeom-e-seo nae-ryeo-ya hae-yo., yu tong gi han i ji nan eum sik eun sang jeom e seo nae ryeo ya hae yo.
Correct because food past 유통기한 must be removed from shelves.
소비기한이 지난 음식은 상점에서 내려야 해요.
so-bi-gi-han-i ji-nan eum-sik-eun sang-jeom-e-seo nae-ryeo-ya hae-yo., so bi gi han i ji nan eum sik eun sang jeom e seo nae ryeo ya hae yo.
Wrong because 소비기한 doesn't affect sale restrictions.
Which word indicates the period when sale is prohibited?
Which word refers to the safe consumption period?
Which is more important for the purchase timing, 유통기한 or 소비기한?