You don't have to/probably won't do X, but at least do Y: 을 것

을 것 까지는 없겠지만 is placed between two actions to say that the first is not necessary or likely, but the second is the least one should do: ‘you don’t have to/probably won’t do X, but at least do Y’. As a result, the second clause is always a command or strong recommendation:

대부분 사우디사람이 영어를 할 수 있어서 아랍어를 유창하게 할 것 까지는 없겠지만 쉬운인사는 배워야 해요.

Since most Saudis can speak English it’s not necessary to master Arabic, but you should at least learn some simple greetings.

결혼식에  초대할 때 비싼 선물을 살 것 까지는 없겠지만 부부에게 돈을 줘야 돼요.

When you’re invited to a Korean wedding it’s not necessary to buy an expensive present but you should at least give the couple money.

아무리 다이어트를 한다고 해도 밥을 안 먹을 것까지는 없겠지만 양을 조금 줄이는 게 좋을 거예요.

No matter how much you diet, it’s not necessary to stop eating but if you reduce the portion sizes a little that would be good.

아무리 스트레스를 받는다고 해도 회사를 그만둘 것까지는 없겠지만 하루 쉬는 게 좋겠어요.

No matter how much stress you’re under, it’s not necessary to quit your job — just taking a day off would be good.

부모님을 만나기 전에 샤워를 할 것 까지는 없겠지만 셔츠는 갈아입어야 돼요.

Before going to visit my parents you don’t have to take a shower, but the least you should do is change that shirt.

가수가 아무리 아프다고 해도 공연을 최소 할 것 까지는 없겠지만 연기는 해야 해요.

Even if the singer is really sick, they shouldn’t cancel the performance but they could at least postpone it.

날마다 여자친구에게 전화를 할 것 까지는 없겠지만 주말마다 전화를 해야 해요.

You probably won’t call your girlfriend everyday but you should at least call on weekends.

아무리 바쁘다고 해도 주방 전체 청소할 것 까지는 없겠지만 설거지는 해야 해요.

I know that you’re busy so you probably won’t clean the entire kitchen but you should at least wash the dishes.

Learning Korean?
Want to see my favorite and most comprehensive Korean course?
Yes, show me