The first question Social Security will ask to determine whether you are disabled is whether your condition(s) prevents you from performing what is called substantial gainful activity. For 2014, substantial gainful activity is $1070 gross per month.
This means that to be found disabled we have to prove that you are not earning, on average, more than $1,070 gross income per month.
There are special rules that apply if you are self-employed. There are also separate earning allowances if you are legally blind.
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