Your SSD benefits are determined by your past work history, the amount of income you currently receive, and your current household situation. The “average” monthly SSD benefit is $1,236 per month, with about 90 percent of all beneficiaries getting less than $2,000 per month. SSD benefits only replace about half of the worker’s past earnings for most beneficiaries. Generally speaking, you may work no more than 20 hours per week and cannot make more than $1,350 per month while you are receiving disability benefits.