owe someone one
owe (one) one
To be indebted to someone for something they did. Thanks for not ratting me out to the boss about being late this morning—I owe you one!
owe someone oneINFORMAL
If you owe someone one, you feel very grateful to them for something they have done for you. `I've got the engine going again.' `Thanks, mate — I owe you one!'
owe someone onefeel indebted to someone. informal
1990 Paul Auster The Music of Chance ‘I guess I owe you one,’ Floyd said, patting Nashe's back in an awkward show of gratitude.