on own time

on (one's) own time

When one is not actively working at one's job; in one's free time. It's hard to pursue a degree on your own time when you're also working a full-time job.
See also: on, own, time
Farlex Dictionary of Idioms.

on one's own time

not while one is at work. The boss made me write the report on my own time. That's not fair. Please make your personal telephone calls on your own time.
See also: on, own, time
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • on (one's) own time
  • on one's own time
  • a full-time job
  • full-time job
  • gig economy
  • nine-to-five job
  • turnaround time
  • on the job
  • inning
  • a good innings