have an impact on

have an impact on (someone or something)

To affect or influence someone or something. Of course your decision has an impact on me—I'm your wife! Don't worry, your grade on that assignment has very little impact upon your overall grade for the semester.
See also: have, impact, on
Farlex Dictionary of Idioms.

have an impact on someone or something

to leave an impression on someone or something. The sharp change in interest rates had an impact on the housing market. Your story really had an impact on me.
See also: have, impact, on
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • have an impact on (someone or something)
  • impact
  • impact (up)on (someone or something)
  • impact on
  • halfhearted
  • half-hearted about (someone or something)
  • a shot in the locker
  • locker
  • fail (someone) on (something)
  • failing