Cost/pay/charge the earth - Idioms by The Free Dictionary
cost/pay/charge the earth
cost the earth
To be exorbitant or burdensome in expense. A: "Your new car looks pretty slick!" B: "I should hope so, it cost the earth!" All these new taxes and service charges are going to cost the earth.
cost (or charge or pay) the earth cost (or charge or pay) a large amount of money. British informal
cost/pay/charge the ˈearth (British English, informal) cost/pay/charge a lot of money: It needn’t cost the earth to refurbish your offices.