You qualify for SSDI if you pass two separate tests. First, you must have worked long enough, and recently enough, in jobs that paid Social Security taxes. Second, you must have a medical condition that keeps you from doing substantial work and that has lasted, or is expected to last, at least 12 months or to result in death.
Meeting one test without the other is not enough. Below is how the Social Security Administration (SSA) applies each one, and how it decides the medical question step by step.
Do you qualify for SSDI?
SSDI (Social Security Disability Insurance) is an insurance benefit you earned through work. That is why it has a work test. It is not based on financial need, so there is no limit on savings or a spouse’s income for SSDI itself.
A quick way to think about it:
- Did you work and pay Social Security taxes for several years, including recent years? If yes, you may meet the work test.
- Can you no longer earn more than SSA’s substantial gainful activity (SGA) amount because of your condition? For 2026, SGA is $1,690 a month, or $2,830 a month if you are statutorily blind.
- Has your condition lasted, or is it expected to last, at least 12 months? SSA calls this the duration requirement.
If you have little or no work history, SSDI may not be available, but SSI might be. SSI is a needs-based program with no work requirement. Our guide to SSI vs SSDI explains the difference.
The work requirement: credits and insured status
SSA measures your work in credits. In 2026, you earn one credit for every $1,890 in covered earnings, up to four credits a year. Your credits decide whether you are “insured” for disability, and SSA uses two tests to check.
The recent work test
This test asks whether you worked recently enough. It depends on your age when your disability began:
- In or before the quarter you turn 24: generally 1.5 years of work in the 3 years before your disability began.
- After 24 but before 31: work in about half the time between age 21 and the start of your disability.
- Age 31 or older: generally 5 years of work in the 10 years before your disability began. In credit terms, that is 20 credits in the 40 quarters ending when you became disabled.
The duration of work test
This test asks whether you worked long enough in total. The amount rises with age. SSA’s July 2026 disability booklet gives examples: 1.5 years of work if you became disabled before 28, 5 years at 42, 7 years at 50, and 9.5 years at 60. SSA notes the table is an estimate and does not cover every situation.
Your date last insured
Insured status does not last forever after you stop working. Once you have been out of work long enough, you pass a date SSA calls your date last insured. To get SSDI, you generally have to show you were disabled on or before that date. This matters most for people who stopped working years ago and are only now applying.
You can check your earnings record by signing in to your my Social Security account at ssa.gov. If the record is missing years you worked, that is worth fixing early.
The medical requirement
SSA’s definition of disability is strict. You must be unable to do any substantial gainful activity because of a medically determinable physical or mental impairment. The impairment must have lasted, or be expected to last, at least 12 continuous months, or be expected to result in death.
A few things follow from that definition:
- Partial or short-term disability does not count. A serious injury expected to heal within a year usually does not qualify on its own.
- A diagnosis is not enough. SSA looks at how your condition limits what you can do: sitting, standing, lifting, concentrating, keeping a schedule, getting along with others.
- Objective medical evidence carries the most weight. Exam findings, imaging, lab results and treatment notes from acceptable medical sources are what SSA relies on. Your own description matters, but SSA will not find you disabled on symptoms alone.
Our page on disability conditions covers how SSA looks at common conditions.
The five-step evaluation
SSA decides the medical side of every adult claim with the same five questions, in order. It is called the sequential evaluation process. If SSA can decide the claim at one step, it stops there.
- Are you working above the SGA level? If you are earning more than $1,690 a month in 2026 (non-blind), SSA generally finds you are not disabled, whatever your condition.
- Is your condition severe? It must significantly limit basic work activities and meet the 12-month duration requirement.
- Does your condition meet or equal a listing? SSA’s Listing of Impairments (the “Blue Book”) describes conditions that are severe enough on their own. If yours meets or medically equals one, you are found disabled.
- Can you still do your past work? SSA works out your residual functional capacity, which is the most you can still do, and compares it to jobs you held in recent years.
- Can you do any other work? SSA considers your capacity together with your age, education and work experience to decide whether you could adjust to other jobs in the national economy.
Most claims are not decided at step 3. For disabled workers who applied in 2023, SSA’s Annual Statistical Report on the SSDI Program, 2024, found that 45.7 percent of final medical allowances were based on medical and vocational factors considered together, rather than on meeting or equaling a listing. The full figure and its source are in our statistics report. Results vary and past outcomes do not predict any individual result.
How age changes the analysis
Age matters at step 5. SSA’s rules put claimants in age groups, and the older you are, the less SSA expects you to adjust to a new kind of work:
- Under 50: a “younger person.” SSA generally does not consider age to seriously affect your ability to adjust to other work.
- 50 to 54: “closely approaching advanced age.” Together with a severe impairment and limited work experience, age may seriously affect your ability to adjust.
- 55 and older: “advanced age.” SSA considers that age significantly affects your ability to adjust to other work.
- 60 and older: “closely approaching retirement age,” with additional special rules.
SSA also says it will not apply these categories mechanically in a borderline case. If you are within a few days to a few months of the next age group, SSA considers whether to use the older category.
In practice, this means the same medical record can lead to a different result at 52 than at 45, especially if your past work was physically demanding and your skills do not transfer to lighter jobs.
What to do if you were denied
Most people are not approved on their first try, so a denial is not a sign that you do not qualify. What matters is what you do next.
- Read the denial notice closely. It tells you whether you were denied on the work test (a “technical” denial) or on the medical question, and why.
- Appeal within 60 days. You generally have 60 days after you receive the notice to appeal, and SSA assumes you received it 5 days after it was mailed unless you show otherwise.
- Appeal rather than starting over. An appeal keeps your original application date, which protects your back pay. A new application generally does not.
- Fix the gaps in the record. Updated treatment notes, specialist records and clear statements about your limitations are usually what changes the outcome.
Our step-by-step appeal guide walks through each level, and the denied claims page explains how we can help from here.
Common questions
How many work credits do I need for SSDI?
It depends on your age when your disability began. Most people disabled at 31 or older need about 20 credits earned in the 10 years before they became disabled, plus enough total work for their age. Younger workers need fewer.
Can I work and still qualify?
You can work a little, but if you earn more than SGA ($1,690 a month in 2026 for non-blind applicants), SSA generally finds you are not disabled. Earnings below that level are still reviewed for what they say about your abilities.
Do I need a listed condition to qualify?
No. Many people are approved at step 5, when SSA finds that their limitations, age, education and work history rule out other work.
Can I get SSDI if I have never worked?
Generally not on your own record, because SSDI requires work credits. You may qualify for SSI, or for benefits on a parent’s or spouse’s record in some cases.