I want to start working a few hours too. I talked to them a year or so ago and they said I could make $720/month without it affecting SSDI benefits. More income than that and they would deduct the difference on my benefits the next month. Not sure if that is before or after taxes though and not sure the $720 figure is still accurate.

If you are capable of working full time they will allow you a nine month grace period to make sure you can handle the work. If not then they resume your SSDI check and your insurance.

So yeah to answer your question contact them before you work to see what rules are currently in effect.