SOCIAL INSURANCE · 6 MIN READ

SSDI: Qualifying, the 5-Step Test, and Work Incentives

Social Security Disability Insurance (SSDI) pays benefits to workers who become disabled before retirement age. Unlike SSI, SSDI is an earned benefit: eligibility depends on work history, not financial need. To qualify, a worker generally must be both fully insured and pass a recent-work test. For workers disabled at age 31 or older, that is the 20/40 rule — at least 20 QCs earned in the 40-quarter (10-year) period ending with the quarter of disability onset. Younger workers have reduced requirements, and blind workers need only fully insured status. Even after qualifying, benefits do not start immediately: there is a 5-month waiting period, and Medicare entitlement begins only after 24 months of SSDI entitlement (with exceptions such as ALS). Whether the worker is medically disabled is decided by the five-step sequential evaluation at 20 CFR §404.1520, applied in strict order: (1) Is the claimant engaged in substantial gainful activity (SGA)? If yes, denied. (2) Is there a severe impairment that significantly limits basic work activities and is expected to last at least 12 months or result in death? If not, denied. (3) Does the impairment meet or equal a Listing? If yes, allowed. (4) Can the claimant still perform past relevant work, given residual functional capacity? If yes, denied. (5) Considering age, education, and work experience, can the claimant adjust to other work in the national economy? If yes, denied; if no, allowed. The SGA dollar threshold is indexed annually, and a higher threshold applies to blind workers. Because the program wants beneficiaries to attempt a return to work, it offers layered work incentives. The Trial Work Period (TWP) allows 9 service months — months with earnings over an indexed threshold, not necessarily consecutive — within a rolling 60-month window, during which full benefits continue regardless of earnings. When the TWP ends, the 36-month Extended Period of Eligibility (EPE) begins: benefits are paid in any month earnings fall below SGA and merely suspended (not terminated) in months above it. Continuing Disability Reviews (CDRs) periodically recheck whether medical improvement has occurred, and the Ticket-to-Work program supports vocational rehabilitation.