to (one's) cost

to (one's) cost

To one's detriment; due to one's personal experience with something negative. Unfortunately, he's not as forgiving as we all had thought, as I found out to my cost.
See also: cost
Farlex Dictionary of Idioms.

to your ˈcost

(know, discover, etc. something) because of something unpleasant that has happened to you: Joanne’s not a very reliable person, as I’ve recently discovered to my cost.
See also: cost
Farlex Partner Idioms Dictionary
See also:
  • at expense
  • at somebody's expense
  • at someone's expense
  • at (one's) expense
  • be remembered as (something)
  • be remembered as/for something
  • at doorstep
  • at (one's) doorstep
  • be in (one's) good graces
  • be in somebody's good graces