What is the Social Security’s definition of substantial gainful activity?

Whether an applicant can perform substantial gainful work is one of the Social Security Administration’s criteria for determining eligibility for disability benefits. Can you do any type of work, even if you cannot do your former job? Gainful work is any work done for pay or with the intention of profit. Work is considered substantial by the Social Security Administration if it entails significant physical activity, mental activity or some combination of both physical and mental activities. If a doctor determines that you can still do substantial gainful work, then you will not be eligible for disability benefits. Both part-time work and full-time work may be considered substantial gainful activity.