The basic rule: you need a medical condition that stops you from working for at least 12 months

Social Security Disability Insurance (SSDI) requires two things. First, you must have a medical condition — physical, mental, or both — that prevents you from doing substantial work. Second, that condition must be expected to last at least 12 months or result in death. Social Security does not pay for temporary injuries or short-term illnesses, even severe ones.

The agency uses the term substantial gainful activity to describe work that earns a certain amount of money. In 2024, that threshold is $1,550 per month for non-blind applicants and $2,590 for blind applicants. If you earn more than that, Social Security will assume you can work and deny your claim, regardless of your condition. If you earn less, you may still be denied if the agency believes you could earn more with your condition.

Social Security does not care why you cannot work — whether you quit, were fired, or left due to illness. It only cares whether your medical condition itself makes work impossible.

Key Takeaways

  • Your condition must prevent substantial work (earning roughly $1,550 monthly) and be expected to last at least 12 months or result in death.
  • Social Security reviews your medical records, work history, and age to decide; younger applicants face stricter standards than those over 55.
  • You must have worked long enough to earn sufficient work credits, usually 40 total with at least 20 earned in the last 10 years.
  • The agency compares your condition to its list of disabling conditions, but will also consider how your condition affects your ability to do any job.
  • Most initial applications are denied; reconsideration and appeals are common steps, and many people are approved only after requesting a hearing before a judge.

Work credits: how much you must have worked

Before Social Security will even review your medical condition, you must have worked enough to earn work credits. You earn one credit for each $1,730 of wages in 2024 (the amount changes yearly). You can earn up to four credits per year, so earning $6,920 in a year gives you the maximum four credits for that year.

Most people need 40 work credits total, with at least 20 of those earned in the 10 years before you become disabled. If you became disabled before age 24, the rules are different and require fewer credits. If you are blind, you need only 40 credits total with no requirement about when they were earned.

Work credits are based on your own earnings record. Volunteer work, unpaid family work, and work done under the table do not count. If you have not worked enough, you cannot receive SSDI no matter how severe your condition is.

Medical evidence: what Social Security needs to see

Social Security will request your medical records from your doctors, hospitals, and any mental health providers you have seen. The agency looks for objective findings — test results, imaging, physical exam notes — rather than your own description of pain or symptoms. For mental health conditions, it looks for documentation of diagnosis, treatment, and how the condition affects your daily functioning.

You do not need to be hospitalized or have surgery to may have access to. You do need consistent treatment and medical records that show your condition limits what you can do. If you have not seen a doctor in months or years, Social Security will have little to review and will likely deny your claim.

The agency compares your condition to its Blue Book, a list of conditions that automatically may have access to if your medical evidence meets specific criteria. Conditions include arthritis, cancer, heart disease, diabetes, depression, schizophrenia, and many others. If your condition is in the Blue Book and your medical records match the criteria, approval is more likely. If your condition is not listed, Social Security will still consider it, but the process is more difficult.

Age and work capacity: why younger applicants face harder scrutiny

Social Security uses your age as part of its decision. If you are over 55, the agency assumes it is harder for you to learn new work skills and transition to a different job. If you are under 50, it assumes the opposite — that you have time and ability to retrain. This does not mean younger people cannot may have access to; it means Social Security requires stronger medical evidence that you cannot do any work at all.

The agency also considers your education and past work. If you have only done manual labor and your condition prevents manual work, Social Security will ask whether you could do office work instead. If you have no high school diploma and limited English, the agency may find it harder for you to transition to desk work. These factors do not determine your case alone, but they influence how Social Security weighs your medical condition against your ability to work.

The five-step evaluation process Social Security uses

Social Security follows a specific sequence when reviewing your claim. Step one is whether you are currently working and earning substantial income. If you are, your claim is denied immediately. Step two is whether your condition is severe enough to significantly limit your ability to work. If Social Security finds it is not, your claim is denied.

Step three compares your condition to the Blue Book. If your medical evidence meets the criteria for a listed condition, you are approved. If it does not, Social Security moves to step four: whether you can do your past work. If the agency finds you can still do work you have done before, your claim is denied. If you cannot, Social Security moves to step five: whether you can do any other work that exists in the economy, given your age, education, and work history.

Step five is where most denials happen. Even if you cannot do your old job, Social Security may find that other work exists that you could do. You can appeal this finding, and many people are approved only after appealing.

Why most initial applications are denied

Social Security denies roughly 65 to 70 percent of initial applications. This does not mean most people are not disabled; it means the initial review is strict and many people lack complete medical records or do not present their case clearly.

Common reasons for denial include incomplete medical evidence, gaps in treatment, earnings above the substantial gainful activity threshold, or insufficient work credits. Another common reason is that Social Security believes you can do sedentary work — desk jobs — even if you cannot do physical labor.

If your claim is denied, you can request reconsideration, which sends your case to a different reviewer. If reconsideration is denied, you can request a hearing before an administrative law judge. Many people are approved at the hearing stage because they can explain their condition in person and present additional medical evidence.

What happens after you are approved

If Social Security approves your claim, you will receive a monthly payment. The amount depends on your earnings record — the higher your past earnings, the higher your payment. You will also become covered by Medicare after you have been on SSDI for 24 months, even if you are under 65.

Once approved, you must report changes to Social Security: if you return to work, if your condition improves, or if your address changes. If you earn more than the substantial gainful activity amount, your benefits will stop. If you earn less, you may still receive partial benefits. Social Security will also review your case periodically to confirm you still cannot work.

Frequently Asked Questions

Can I get SSDI if I have never worked?

No. SSDI requires work credits earned through your own employment. If you have never worked or worked very little, you do not have enough credits. You may be able to receive Supplemental Security Income (SSI) instead, which is a different program for people with low income and limited resources, regardless of work history.

Does Social Security consider pain or fatigue as a disability by itself?

Not by itself. Social Security requires medical evidence that your pain or fatigue limits your ability to function — for example, test results showing organ damage, imaging showing structural problems, or documented treatment that is not working. Your own report of pain matters, but only if medical records support it.

What if my doctor says I cannot work but Social Security denies me?

A doctor's statement that you cannot work is helpful, but Social Security makes its own decision based on your medical records and the agency's rules. Doctors and Social Security sometimes disagree. If you are denied, you can appeal and present your doctor's opinion as evidence at a hearing. Many people are approved at the hearing stage.

Can I work part-time and still receive SSDI?

Yes, if you earn less than the substantial gainful activity threshold (about $1,550 monthly in 2024). You can also test your ability to work through the trial work period, which allows you to work and earn any amount for nine months without losing benefits. After the trial work period ends, your benefits will stop if you earn above the threshold.

How long does it take to get a decision on my claim?

Initial decisions typically take three to six months. If you request reconsideration, add another three to six months. If you request a hearing, the wait is usually six months to over a year, depending on your local hearing office. Many people are approved at the hearing stage after waiting this long.