owe someone 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.