If you are on an F-1 Student Visa, you can work 20 hours per week on campus during term and full-time in vacations. Off-campus work needs CPT or OPT authorisation. Working without it ends your status.
That is the main line to remember. The mistake students make is assuming any paid work is fine as long as it is part-time. In the US, the place and the authorisation matter more than the pay.
If you want the broader cost and visa picture too, keep the current rules beside the full country guide at /study-abroad/usa.
Do not treat this as a side detail. If you go over the limit or take the wrong kind of work, the risk is not a small fine. It can end your student status.

