If you’re on Title II disability benefits there is what is called the Substantial Gainful Activity (SGA) amount. For 2011, the SGA amount is $1,000 a month. I cringe as I write this since I know how easy it is for people to be confused by the SGA amount. The SGA amount is gross earnings, before taxes. You can have a lot less than $1,000 a month is take home pay and still be over SGA.