If you are on Social Security Disability Insurance (SSDI), you can work up to 45 hours per month if you are self-employed, which averages out to 10 hours per week. There are also income limitations, with the maximum earnings for SSI being $841 per month for a single person and $1,261 per month for eligible couples in 2022. Students under 22 years old have a maximum annual amount of $8,230.