SCIWhat SSDI is
SSDI pays a monthly cash benefit to people who can no longer work because of a disability and who have paid enough into Social Security through past work. Because you earned it, your savings, your home, and a spouse's income don't affect eligibility. After 24 months of benefits you also get Medicare.
Do you have enough work credits?
You earn up to four work credits a year. In 2026 one credit = $1,890 in earnings, so $7,560 earns the maximum four credits for the year. Most people need 40 credits, with 20 earned in the last 10 years before becoming disabled (the "recent work" and "duration of work" tests). Younger workers need far fewer — someone disabled in their 20s may qualify with as few as 6 credits. If you've worked steadily and recently, you're likely insured. Check your status in your my Social Security account.
The medical bar: SSA's definition of disability
SSA uses a strict, all-or-nothing definition: you must be unable to do substantial gainful activity (earning more than $1,690/mo in 2026, or $2,830 if blind) because of a medical condition expected to last at least 12 months or end in death. There is no partial or short-term SSDI.
Conditions are measured against SSA's "Blue Book" listings. Spinal cord injury is evaluated under listing 11.08 (spinal cord disorders) — generally requiring evidence from at least three months after onset showing complete loss of function (11.08A) or significant disorganization of motor function in two extremities (11.08B). Strong applications include detailed records from your SCI / physiatry team. Very severe cases can be fast-tracked through Compassionate Allowances.
How much will you get?
Your SSDI amount is based on your lifetime earnings (your average indexed monthly earnings run through a formula to get your "primary insurance amount") — not on how severe your disability is. In 2026 the average disabled-worker benefit is about $1,630/mo; the maximum at full retirement age is $4,152/mo.
The 5-month wait and 24-month Medicare clock
SSDI has a 5-month waiting period — benefits start the 6th full month after your established onset date. Separately, Medicare begins after you've been entitled to SSDI for 24 months (ALS and end-stage renal disease are exceptions with little or no wait). Plan for that coverage gap.
Family (auxiliary) benefits
Your dependents may also receive monthly benefits on your record — typically a spouse caring for your child, and minor or disabled children — up to a family maximum. A child disabled before age 22 can collect on your record as a Disabled Adult Child, potentially for life.
When SSDI stops or changes
- You earn over SGA (Substantial Gainful Activity — SSA's "able to work" earnings line). Earning more than $1,690/mo (2026) after your work-incentive periods generally ends cash benefits — but the rules are forgiving if you understand them. See working while on benefits.
- Medical improvement. SSA periodically runs a Continuing Disability Review; benefits continue unless they find you've medically improved enough to work.
- You reach full retirement age. SSDI automatically converts to retirement benefits at the same dollar amount — nothing you need to do.
Sources: SSA 2026 COLA Fact Sheet, SSA: How you qualify, SSA Blue Book 11.00.