n
[C]
the money or advantage you gain from a business, project, or something you have done
　The immediate payback for them is publicity.
[U]AmE informal when you do something to make someone suffer because of something they have done to harm you
→revenge
　I guess it's payback time .
payback period
a) the period of time in which you will make a profit on an investment
b) the period of time over which you must pay back money you have borrowed