it/that will cost (one)

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it/that will cost (one)

1. Something will cost a large amount of money, especially compared to a cheaper or simpler option. You can opt to rent a larger van instead of the sedan, but it will cost you. A: "Jane and Joe want to upgrade their tickets to first class." B: "There's still time to do it, but that'll cost them. Are they sure it's worth it?" A: "Will you promose not to tell Mom?" B: "It'll cost you."
2. Something will have a negative impact on one's performance or chance of success. A: "Uh oh, the quarterback just fumbled the ball on his own 20 yard line!" B: "Ouch, that'll cost them big time. They really can't afford to give up any more points this late in the game." You can try to fluff up your résumé a bit when you apply for the job, but it'll cost you if your interviewers find out.
See also: cost, that, will

it will ˈcost you

(spoken) used to say that something will be expensive: There is also a de luxe model available, but it’ll cost you.
See also: cost, will
References in classic literature ?
It isn't so very long to Cowes now and, thank heavens, that'll cost us nothing.
He shows leadership where the Prime Minister and Chancellor have remained submerged." David Hillman of the Robin Hood Tax campaign, added: "Good on him for slapping the wrists of Goldman Sachs, but why is the Government keeping schtum on a sleight of hand that'll cost us millions?"
Yep, you'd better get those Union Jacks dusted down for a right old knees-up, taking in Llandudno, Caernarfon, Bangor and Welshpool over a two-day jolly that'll cost us an arm and a leg.
'We could catch a bus, but that'll cost us more money.
That'll cost us dear because the one thing we are short of at the moment is defenders.