How SSDI Works: A General Process Overview

Social Security Disability Insurance (SSDI) is a federal insurance program funded through Social Security taxes. SSA decides each claim under current medical, work-credit, insured-status, and procedural rules.

This page explains the program generally. It does not determine whether a person is insured, disabled, or entitled to benefits.

Work Credits and Insured Status

Workers earn Social Security credits from covered earnings. The number and recency of credits required vary by age and when disability began. A Social Security Statement or SSA record can show credits and estimated benefits.

SSI is a separate needs-based program with income, resource, citizenship, and immigration-status rules. Some people apply for both programs, but SSA evaluates each program separately.

SSA's Disability Standard

SSA generally requires a medically determinable impairment that prevents substantial gainful activity and has lasted, or is expected to last, at least 12 months or result in death. SSDI does not provide partial or short-term disability benefits.

The Sequential Evaluation

SSA's adult disability review generally asks:

Whether current work is substantial gainful activity.
Whether an impairment is severe under SSA's rules.
Whether the impairment meets or medically equals a listed impairment.
Whether the person can perform relevant past work.
Whether other work exists under SSA's vocational rules.

Residual Functional Capacity, medical evidence, age, education, and work history can be relevant at different stages. A public description cannot reproduce SSA's determination from a few facts.

Application and Review

Applications request medical, work, and treatment information. A state Disability Determination Services office commonly develops the medical record for SSA. A consultative examination may be requested when the existing evidence is insufficient.

If SSA issues an unfavorable notice, the notice identifies the review procedure and deadline that apply to that claim. Review stages can include reconsideration, an ALJ hearing, Appeals Council review, and federal court.

Benefit Amount and Medicare

An SSDI payment is based primarily on the worker's covered earnings record, not the severity of a condition. Waiting-period, family-benefit, offset, and Medicare rules may also apply. SSA's estimate and award notice are the authoritative sources for an individual amount.

Official Sources

This page provides general program information and does not evaluate eligibility, evidence, or a claim deadline.