Red Book

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Introducing The Red Book

What's New In 2024?

Contacting Us

How Do We Define Disability?

Overview Of Our Disability Programs

Returning To Work

How Do Employment Supports Help?

Resources To Assist You Return To Work

Resources To Assist Youth With the Transition To A Successful Adulthood

SSDI and SSI Employment Supports

SSDI Only Employment Supports

SSI Only Employment Supports

Special Rules For Persons Who Are Blind

Additional Help With Health Care For Persons With Disabilities

Example of Concurrent Benefits With Employment Supports

Demonstration Projects Update


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How Do We Define Disability?

Our Definition of Disability

To meet our definition of disability, you must not be able to engage in any substantial gainful activity (SGA) because of a medically determinable physical or mental disability(ies) that is either:

  • Expected to result in death.
  • Has lasted or is expected to last for a continuous period of at least 12 months.


There is a separate definition of disability for children (under age 18) who are applying for the Supplemental Security Income (SSI) program. A child with a disability also qualifies for the SSI employment supports described later in this Red Book.

What is Substantial Gainful Activity (SGA)?

We use the term “substantial gainful activity” to describe a level of work activity and earnings.

Work is “substantial” if it involves doing significant physical or mental activities or a combination of both.

“Gainful” work activity may include:

  • Work performed for pay or profit.
  • Work of a nature generally performed for pay or profit.
  • Work intended for profit, whether or not a profit is realized.
  • Work performed on a part-time basis.

We use SGA as one of the factors to decide if you are initially eligible for Social Security Disability benefits or SSI. If you receive SSDI benefits, we use SGA to decide if your eligibility for benefits continue after you return to work and complete your Trial Work Period (TWP). If you receive SSI based on disability, we apply different standards to determine if your eligibility should continue.

We do not use SGA as a factor to determine initial eligibility for SSI if you are blind.

How Do We Evaluate Your Activity for SGA Purposes?

We generally use earnings guidelines to evaluate whether your work activity is SGA.

The amount of monthly earnings we consider to be SGA depends on the nature of your disability. The Social Security Act specifies a higher SGA amount for people who meet the definition of blindness described by the law. For details on our rules about earnings and blindness, refer to  Working While Disabled: How We Can Help (Publication No. 05-10095). We usually adjust these amounts every year based on increases in the national average wage index.

What If You Are Self-employed?

If you are self-employed and your disability is not blindness, how we evaluate your work activity for SGA purposes depends on certain factors. These determine whether we evaluate your work activity before or after you have received SSDI benefits for 24 months and the purpose of the evaluation. We will evaluate your work under the Three Tests or the Countable Income Test to determine if your work activity is SGA, depending on when you worked.

The Three Tests:

We apply 3 tests to evaluate your work activity when you initially apply for SSDI and before you have received SSDI benefits for 24 months. We will also use the 3 tests to evaluate your work activity during the re-entitlement period to determine if we can reinstate your benefits in the Extended Period of Eligibility (EPE) (see EXTENDED PERIOD OF ELIGIBILITY). Your self-employment work activity is SGA if one of the below criteria is met:

  • You render significant services to the business, and you have average monthly earnings over the SGA level.
  • Your work is comparable to the work of a person without a disability in your community who is engaged in the same or similar businesses.
  • Your work is worth more than the SGA level earnings in terms of its effects on the business or when compared to what you would have to pay an employee to do the work.

The Countable Income Test:

We apply the countable income test if you have received SSDI benefits for at least 24 months. We will only use the countable income test to determine whether you have engaged in SGA and if your disability has ended as a result of that SGA.

For current SGA guidelines, please refer to the publication Working While Disabled: How We Can Help (Publication No. 05-10095). If your average monthly countable earnings exceed the SGA amount, we will determine that your work is SGA. If there is evidence that you are not rendering significant services in the month, we will determine that your work is not SGA. If your monthly countable earnings average less than the allowed amount, we will decide that your work is not SGA.

For current SGA guidelines, please refer to the publication Working While Disabled: How We Can Help (Publication No. 05-10095).

If you are self-employed and your disability is blindness, we decide SGA based on certain factors. These include whether you have received a substantial income from the business and rendered significant services to the business. We make this determination using your countable earnings. We also use your countable earnings to determine whether your work is SGA and we can reinstate benefits during the EPE.

If you are self-employed, your disability is blindness, and you are age 55 or older, special rules apply. Your earnings may demonstrate SGA, however your work may require a lower level of skill and ability than the work you did before age 55, or when you became blind, whichever is later. If so, we will suspend, not terminate, your benefits. Your eligibility for SSDI benefits continues indefinitely, and we pay your benefits for any months’ earnings falling below SGA. For more information on SGA, refer to our website: