slightly formal to have a noticeable effect on something or someone
Any problems with the computers will impact on our schedules.Falling export rates have impacted on the economy.
(redirected from impact upon)
impact (up)on (someone or something)
To affect or influence someone or something. Of course your decision impacts on me—I'm your wife!Don't worry, your grade on that assignment won't impact upon your overall grade for the semester.
impact (up)on someone or something
[for something] to have an effect on someone or something. (Upon is formal and less commonly used than on.)This plant closing will impact upon the local economy for years to come.The day's troubles impacted on Rachel quite seriously.
impact on
v.
To have an effect on someone or something: The results of the election will impact on upcoming legislation.