I owe you one

Also found in: Acronyms.

I owe you one.

Inf. Thank you, now I owe you a favor.; I owe you something similar in return. Bob: I put the extra copy of the book on your desk. Sue: Thanks, I owe you one. Bill: Let me pay for your drink. Bob: Thanks a lot, I owe you one.
See also: one, owe