Social Security disability benefits are monthly payments from the federal government to people who can’t work because of a serious medical condition. There are two main programs: Social Security Disability Insurance (SSDI), which is based on your work history, and Supplemental Security Income (SSI), which is based on financial need. Both are administered by the Social Security Administration, but they have different eligibility rules, funding sources, and payment amounts.
Two Programs, Different Rules
SSDI is funded through the payroll taxes you and your employers paid while you worked. To qualify, you need a qualifying disability and enough work history to have earned sufficient credits. If approved, your monthly benefit is calculated from your past earnings, and certain family members (such as a spouse or dependent children) may also receive payments based on your record.
SSI does not require any work history. It’s designed for people who are 65 or older, blind, or disabled and who have very limited income and assets. SSI is funded from general tax revenue, not payroll taxes. The federal SSI payment for 2026 is up to $994 per month for an individual and $1,491 for a couple. Some states add a small supplement on top of the federal amount.
You can potentially qualify for both programs at the same time if your SSDI payment is low enough and your resources fall within SSI limits.
How the SSA Defines Disability
The Social Security Administration uses a strict definition. To qualify under either program, you must be unable to perform any “substantial gainful activity” because of a physical or mental condition that has lasted, or is expected to last, at least 12 months, or is expected to result in death. This is not a short-term disability standard. A broken leg that will heal in four months won’t qualify, but a degenerative joint condition that prevents you from working for a year or more could.
Substantial gainful activity (SGA) means work that earns above a certain monthly threshold. The SSA publishes updated SGA amounts each year. If you’re currently earning above that limit, the SSA will generally consider you capable of working, regardless of your medical condition. The threshold is higher for people who are legally blind.
The SSA evaluates both physical and mental conditions. Depression, anxiety disorders, PTSD, and other mental health conditions can qualify just as back injuries, cancer, or heart disease can. What matters is whether the condition, supported by medical evidence, prevents you from doing any type of work, not just your previous job.
Work Credits You Need for SSDI
SSDI requires you to have paid into Social Security through payroll taxes long enough to earn a minimum number of work credits. In 2026, you earn one credit for every $1,890 in covered earnings, up to a maximum of four credits per year (which means earning at least $7,560 in the year).
To qualify for SSDI, you must pass two tests: a “recent work” test and a “duration of work” test. Both depend on your age when the disability began.
The recent work test checks whether you’ve been working recently enough:
- Under age 24: You need six credits earned in the three years before your disability started.
- Age 24 to 31: You generally need credits for working half the time between age 21 and when your disability began.
- Age 31 or older: You need at least 20 credits in the 10 years immediately before your disability started.
The duration of work test requires a longer overall work history as you get older. Someone disabled before age 28 needs only about 1.5 years of work. By age 42, that rises to 5 years. At age 60, you’d need 9.5 years of total work credits. If you’re statutorily blind, you only need to meet the duration test and can skip the recent work requirement.
People who haven’t worked enough to qualify for SSDI may still be eligible for SSI if they meet income and asset limits.
How Much SSDI Pays
Your SSDI payment is based on your average lifetime earnings before your disability began. Higher earners who paid more in Social Security taxes receive larger monthly checks. The SSA calculates your benefit using a formula applied to your highest-earning years, similar to how retirement benefits are figured.
You can check your estimated disability benefit by creating an account on the SSA’s website at ssa.gov and reviewing your Social Security Statement. This shows your earnings record and a projected monthly benefit if you were to become disabled.
SSDI recipients also become eligible for Medicare, but not immediately. There’s a five-month waiting period after your disability onset date before benefits begin, and Medicare coverage typically starts 24 months after your disability onset. During that gap, you may need to rely on other health coverage.
How to Apply
You can apply for disability benefits online at ssa.gov, by phone, or in person at a local Social Security office. The application asks for detailed information about your medical conditions, treatments, medications, doctors, work history, and daily activities. You’ll want to gather medical records, contact information for all treating physicians, and a list of your jobs over the past 15 years before you start.
The SSA will request your medical records directly from your doctors. In some cases, the agency may ask you to attend a consultative exam with a doctor it selects, especially if your existing medical records don’t provide enough information. These exams are paid for by the SSA.
Initial decisions generally take six to eight months, though the timeline varies depending on how quickly the SSA can obtain your medical evidence and whether quality reviews are needed.
What Happens If You’re Denied
Most disability applications are denied at the initial stage. If that happens, you have the right to appeal through a multi-step process. The first level is called reconsideration, where a different reviewer looks at your case, including any new medical evidence you submit. If reconsideration is also denied, you can request a hearing before an administrative law judge. This hearing is where many applicants who were initially denied end up getting approved, because you (or your representative) can present your case directly and bring testimony from medical experts.
Beyond the hearing level, further appeals go to the Appeals Council and eventually to federal court, though most cases are resolved before reaching those stages. You typically have 60 days from the date of each denial to file your appeal, so it’s important to act quickly after receiving a decision.
Working While Receiving Benefits
Receiving disability benefits doesn’t necessarily mean you can never earn any income. The SSA offers several work incentives that let you test your ability to work without immediately losing your benefits. During a “trial work period,” you can work for up to nine months (within a rolling 60-month window) and still receive your full SSDI check, regardless of how much you earn. After the trial period, the SGA earnings limit determines whether your benefits continue.
SSI works differently because payments are reduced based on your income. For every dollar you earn from work (after certain exclusions), your SSI payment decreases, though you still come out ahead financially compared to not working at all.
Both programs also offer protections that make it easier to restart benefits if a work attempt doesn’t succeed, so trying to return to work carries less risk than many people assume.