The trial work period (TWP) allows disability beneficiaries to test their ability to work for at least nine months. During the TWP, Social Security beneficiaries may earn any amount and receive full Social Security Disability benefits.

Effective Jan. 1, 2001, earnings of $530 per month count as a trial work month. After completion of nine trial work months, the substantial gainful activity (SGA) level is used to determine whether earnings are substantial or not. If earnings fall below the SGA level, full benefits generally continue.

If earnings are higher than the SGA level, cash benefits are normally suspended while medical benefits continue. Beginning Jan. 1, 2001, a Social Security Disability SGA level is $740 a month, or $1,240for a person who is blind. This amount will be automatically adjusted annually based on increases in the national average wage index.