He achieved success at the expense of his health.

I need to keep track of my monthly expenses.

This dress is very expensive.

She bought an expensively designed dress for the party.

I need to submit my expense account by the end of the month.

The company reimburses employees for their business expenses.

I need to budget my living expenses carefully.

I had to pay for the repairs myself, so the out-of-pocket expenses were quite high.