Social Security determines disability through a five-step sequential evaluation. At each step, the Social Security Administration asks a specific question, and the answer either decides your claim on the spot or moves you to the next step. The same medical standard applies to both Social Security Disability Insurance (SSDI) and Supplemental Security Income (SSI): your physical or mental condition must prevent substantial work and must have lasted, or be expected to last, at least 12 months or result in death.
Step One: Are You Working Above the Earnings Limit?
The first question is the simplest. If you are working and earning more than a set monthly amount, the SSA treats that as “substantial gainful activity” (SGA) and denies your claim no matter how serious your condition is. For 2026, the monthly SGA thresholds are $1,690 for non-blind applicants and $2,830 for blind applicants, and the figures are adjusted each year for inflation.1Social Security Administration. Substantial Gainful Activity
The SSA looks at gross earnings before taxes, not take-home pay. A short, unsuccessful attempt to return to work generally will not sink your claim; examiners look at whether the earnings are sustained. If you are earning under the limit (or not working at all), the evaluation moves to step two.
Step Two: Is Your Condition Severe and Long-Lasting?
Step two combines two tests. First, your impairment must be severe enough to significantly limit basic work activities such as walking, standing, sitting, lifting, or understanding and remembering simple instructions. A condition that causes only a minimal limitation fails this screen.2eCFR. 20 CFR Part 404 Subpart P – Evaluation of Disability
Second, the condition must satisfy the duration requirement: it must have lasted, or be expected to last, at least 12 continuous months, or be expected to result in death.3Social Security Administration. 20 CFR 404.1509 – How Long the Impairment Must Last A serious but temporary injury with an expected recovery inside a year does not qualify. Both tests apply together at this step.4Social Security Administration. SSR 23-1p: Titles II and XVI: Duration Requirement for Disability
Some conditions clear this step almost automatically. The Compassionate Allowances program identifies diagnoses — mostly certain cancers, adult brain disorders, and rare childhood conditions — that so obviously meet the disability standard that claims can be approved in days or weeks rather than months.5Social Security Administration. Compassionate Allowances
Step Three: Does Your Condition Match a Listed Impairment?
The SSA maintains a Listing of Impairments organized by body system: musculoskeletal, cardiovascular, neurological, mental health, and others. Each listing sets out the specific clinical findings, test results, or documented symptoms that establish disability automatically.6eCFR. 20 CFR 404.1525 – Listing of Impairments in Appendix 1
If your medical evidence matches a listing — the right imaging results, lab values, or documented symptoms — you are found disabled, and the SSA does not go on to examine your age, education, or work history. If your condition does not match a listing exactly, you may still qualify by showing your impairment is medically equivalent in severity and duration to a listed one. That determination leans heavily on objective evidence: MRI results, blood work, psychiatric evaluations, and treatment records.
When your own records are not detailed enough, the SSA will pay for a consultative examination. The agency prefers to use your treating doctor for this exam, and turns to an independent physician when your doctor cannot perform it, lacks the necessary equipment, or when your records contain inconsistencies that need to be resolved.7Social Security Administration. Part II – Evidentiary Requirements Skipping a scheduled consultative exam can be grounds for denial.
Step Four: Can You Still Do Any Past Work?
If your condition does not meet or equal a listing, the SSA measures what you can still do against what your old jobs required. It first assesses your residual functional capacity (RFC): the most you can do physically and mentally on a sustained basis given your limitations. It then compares that RFC to the demands of your past relevant work.
Past relevant work means jobs you performed within the last five years that qualified as substantial gainful activity and lasted long enough for you to learn how to do them.8eCFR. 20 CFR 404.1560 – When We Will Consider Your Vocational Background The SSA considers both how you actually did the job and how the job is generally performed in the national economy. If you can still handle either version of any past job, your claim is denied at step four.
At a hearing, an Administrative Law Judge often calls a vocational expert to testify. The judge poses hypothetical scenarios reflecting your specific limitations, and the expert applies occupational data and professional experience to say whether someone with those limitations could still do your past work.9Social Security Administration (SSA). Testimony of a Vocational Expert That testimony frequently carries substantial weight in the final decision.
Step Five: Can You Adjust to Other Work?
If you cannot return to any past job, the evaluation reaches its final step. The question now is whether you can adjust to a different kind of work that exists in significant numbers in the national economy. The burden shifts at this step: the SSA must show suitable jobs exist, rather than requiring you to prove they do not.
To answer the question, the SSA applies the Medical-Vocational Guidelines, commonly called the Grids. The Grids weigh your RFC against three vocational factors: age, education, and work experience.10eCFR. 20 CFR Part 404 Subpart P – Determining Disability and Blindness
Age carries particular weight, and the SSA sorts applicants into three groups:
- Younger person (under 50): generally considered able to adapt to new work, though applicants 45 to 49 face slightly stricter standards.
- Person closely approaching advanced age (50 to 54): age becomes a more significant limiting factor.
- Person of advanced age (55 and older): age is treated as a serious barrier to adjustment, and the rules become considerably more favorable.
Education is categorized from illiteracy up through marginal (sixth grade or less), limited (seventh through eleventh grade), and high school and above.11Social Security Administration (SSA). Education as a Vocational Factor Lower education combined with advanced age and an RFC limited to sedentary work often produces approval under the Grids, especially where the applicant has no skills that transfer from past jobs. If the SSA cannot identify jobs you could realistically perform given all these factors together, your claim is approved.
The Same Medical Test, Two Different Programs
The five steps above decide the medical question, and they work identically for SSDI and SSI. What differs is the non-medical eligibility layered on top. SSDI requires enough recent work history: you generally need 40 Social Security work credits, with 20 of them earned in the 10 years before your disability began, though younger workers can qualify with fewer.12Social Security Administration. How Does Someone Become Eligible? – Disability Benefits SSI is needs-based, with a 2026 resource limit of $2,000 for an individual and $3,000 for a couple.13Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet Passing the medical evaluation gets you across the disability line; whether benefits actually issue, and under which program, depends on these separate rules.
After the Decision
You apply for disability benefits online at ssa.gov, by phone at 1-800-772-1213, or in person at a local Social Security office.14Social Security Administration. Apply Online for Disability Benefits Your application is forwarded to your state’s Disability Determination Services (DDS), which gathers medical evidence, arranges any needed consultative exam, and issues the initial decision. Most initial decisions take several months, and the majority of first-time applications are denied.15Social Security Administration. Disability Determination Process
A denial is not the end of the road, but the deadline is short. You have 60 days from the date you receive the decision to appeal, and that same 60-day clock resets at each subsequent level: reconsideration, hearing before an Administrative Law Judge, Appeals Council review, and finally federal district court.16Social Security Administration. Appeal a Decision We Made The hearing level has historically produced the highest approval rate. Missing a deadline generally means starting over with a new application, so if you disagree with a decision, file quickly.